/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:03:33,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:03:33,708 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:03:33,734 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:03:33,788 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 15:03:33,812 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:03:33,813 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:03:33,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:03:33,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:03:33,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:03:33,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:03:33,816 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:03:33,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:03:33,817 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:03:33,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:03:33,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:03:33,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:03:33,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:03:33,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:03:33,818 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:03:33,818 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:03:33,818 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:03:33,818 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:03:33,819 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:03:33,819 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:03:33,819 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:03:33,819 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:03:33,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:03:33,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:03:33,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:03:33,820 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:03:33,820 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:03:33,820 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:03:33,820 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:03:33,820 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:03:33,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:03:33,820 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:03:33,821 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:03:34,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:03:34,158 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:03:34,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:03:34,161 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:03:34,163 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:03:34,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl [2021-06-05 15:03:34,164 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-equiv.wvr.bpl' [2021-06-05 15:03:34,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:03:34,200 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:03:34,201 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:03:34,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:03:34,202 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:03:34,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:03:34" (1/1) ... [2021-06-05 15:03:34,222 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:03:34" (1/1) ... [2021-06-05 15:03:34,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:03:34,231 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:03:34,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:03:34,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:03:34,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:03:34" (1/1) ... [2021-06-05 15:03:34,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:03:34" (1/1) ... [2021-06-05 15:03:34,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:03:34" (1/1) ... [2021-06-05 15:03:34,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:03:34" (1/1) ... [2021-06-05 15:03:34,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:03:34" (1/1) ... [2021-06-05 15:03:34,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:03:34" (1/1) ... [2021-06-05 15:03:34,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:03:34" (1/1) ... [2021-06-05 15:03:34,249 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:03:34,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:03:34,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:03:34,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:03:34,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:03:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:03:34,325 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:03:34,326 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:03:34,326 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:03:34,326 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:03:34,326 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:03:34,326 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:03:34,326 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:03:34,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:03:34,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:03:34,327 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:03:34,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:03:34,327 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:03:34,327 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 15:03:34,327 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 15:03:34,328 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 15:03:34,328 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 15:03:34,505 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:03:34,506 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-06-05 15:03:34,506 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 15:03:34,507 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 15:03:34,507 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-06-05 15:03:34,508 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:03:34 BoogieIcfgContainer [2021-06-05 15:03:34,508 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:03:34,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:03:34,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:03:34,512 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:03:34,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:03:34" (1/2) ... [2021-06-05 15:03:34,513 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d66360d and model type parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:03:34, skipping insertion in model container [2021-06-05 15:03:34,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:03:34" (2/2) ... [2021-06-05 15:03:34,514 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-equiv.wvr.bpl [2021-06-05 15:03:34,519 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:03:34,519 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:03:34,519 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:03:34,520 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:03:34,601 INFO L149 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2021-06-05 15:03:34,620 INFO L255 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-06-05 15:03:34,637 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:03:34,638 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:03:34,638 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:03:34,638 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:03:34,638 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:03:34,638 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:03:34,638 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:03:34,638 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:03:34,646 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 110 flow [2021-06-05 15:03:34,666 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 105 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:34,669 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:34,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 15:03:34,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:34,679 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:34,679 INFO L430 AbstractCegarLoop]: === Iteration 1 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:34,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:34,688 INFO L82 PathProgramCache]: Analyzing trace with hash 848381826, now seen corresponding path program 1 times [2021-06-05 15:03:34,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:34,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334496905] [2021-06-05 15:03:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:34,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:34,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334496905] [2021-06-05 15:03:34,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334496905] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:03:34,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:03:34,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:03:34,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668936806] [2021-06-05 15:03:34,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:03:34,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:34,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:03:34,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:03:34,948 INFO L87 Difference]: Start difference. First operand has 105 states, 103 states have (on average 2.9029126213592233) internal successors, (299), 104 states have internal predecessors, (299), 0 states have call successors, (0), 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 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 15:03:35,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:35,028 INFO L93 Difference]: Finished difference Result 253 states and 745 transitions. [2021-06-05 15:03:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:03:35,029 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 16 [2021-06-05 15:03:35,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:35,044 INFO L225 Difference]: With dead ends: 253 [2021-06-05 15:03:35,044 INFO L226 Difference]: Without dead ends: 247 [2021-06-05 15:03:35,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:03:35,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-05 15:03:35,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 143. [2021-06-05 15:03:35,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.936619718309859) internal successors, (417), 142 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 417 transitions. [2021-06-05 15:03:35,111 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 417 transitions. Word has length 16 [2021-06-05 15:03:35,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:35,111 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 417 transitions. [2021-06-05 15:03:35,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 15:03:35,112 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 417 transitions. [2021-06-05 15:03:35,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 15:03:35,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:35,114 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:35,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:03:35,114 INFO L430 AbstractCegarLoop]: === Iteration 2 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:35,115 INFO L82 PathProgramCache]: Analyzing trace with hash 890214852, now seen corresponding path program 2 times [2021-06-05 15:03:35,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:35,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789795195] [2021-06-05 15:03:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:35,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:35,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789795195] [2021-06-05 15:03:35,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789795195] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:03:35,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:03:35,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:03:35,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603007695] [2021-06-05 15:03:35,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:03:35,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:35,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:03:35,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:03:35,164 INFO L87 Difference]: Start difference. First operand 143 states and 417 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 15:03:35,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:35,213 INFO L93 Difference]: Finished difference Result 262 states and 765 transitions. [2021-06-05 15:03:35,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:03:35,215 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 16 [2021-06-05 15:03:35,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:35,218 INFO L225 Difference]: With dead ends: 262 [2021-06-05 15:03:35,218 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 15:03:35,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:03:35,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 15:03:35,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 145. [2021-06-05 15:03:35,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.923611111111111) internal successors, (421), 144 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 421 transitions. [2021-06-05 15:03:35,239 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 421 transitions. Word has length 16 [2021-06-05 15:03:35,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:35,241 INFO L482 AbstractCegarLoop]: Abstraction has 145 states and 421 transitions. [2021-06-05 15:03:35,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 15:03:35,242 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 421 transitions. [2021-06-05 15:03:35,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:03:35,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:35,249 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:35,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 15:03:35,250 INFO L430 AbstractCegarLoop]: === Iteration 3 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:35,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:35,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1702344252, now seen corresponding path program 1 times [2021-06-05 15:03:35,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:35,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609208545] [2021-06-05 15:03:35,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:35,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:35,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:35,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609208545] [2021-06-05 15:03:35,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609208545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:35,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255089382] [2021-06-05 15:03:35,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:35,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:03:35,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:35,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255089382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:35,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:35,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 15:03:35,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884802772] [2021-06-05 15:03:35,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:03:35,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:35,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:03:35,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:03:35,467 INFO L87 Difference]: Start difference. First operand 145 states and 421 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 15:03:35,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:35,515 INFO L93 Difference]: Finished difference Result 199 states and 578 transitions. [2021-06-05 15:03:35,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:03:35,515 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 18 [2021-06-05 15:03:35,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:35,517 INFO L225 Difference]: With dead ends: 199 [2021-06-05 15:03:35,517 INFO L226 Difference]: Without dead ends: 199 [2021-06-05 15:03:35,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:03:35,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-06-05 15:03:35,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 149. [2021-06-05 15:03:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 3.0067567567567566) internal successors, (445), 148 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 445 transitions. [2021-06-05 15:03:35,526 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 445 transitions. Word has length 18 [2021-06-05 15:03:35,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:35,526 INFO L482 AbstractCegarLoop]: Abstraction has 149 states and 445 transitions. [2021-06-05 15:03:35,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 15:03:35,526 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 445 transitions. [2021-06-05 15:03:35,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:03:35,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:35,527 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:35,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 15:03:35,742 INFO L430 AbstractCegarLoop]: === Iteration 4 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:35,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:35,742 INFO L82 PathProgramCache]: Analyzing trace with hash -735916285, now seen corresponding path program 1 times [2021-06-05 15:03:35,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:35,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756547570] [2021-06-05 15:03:35,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:35,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:35,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756547570] [2021-06-05 15:03:35,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756547570] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:03:35,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:03:35,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:03:35,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189493262] [2021-06-05 15:03:35,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:03:35,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:35,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:03:35,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:03:35,810 INFO L87 Difference]: Start difference. First operand 149 states and 445 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:35,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:35,886 INFO L93 Difference]: Finished difference Result 246 states and 702 transitions. [2021-06-05 15:03:35,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:03:35,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 18 [2021-06-05 15:03:35,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:35,888 INFO L225 Difference]: With dead ends: 246 [2021-06-05 15:03:35,888 INFO L226 Difference]: Without dead ends: 214 [2021-06-05 15:03:35,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:03:35,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-06-05 15:03:35,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2021-06-05 15:03:35,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.901840490797546) internal successors, (473), 163 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 473 transitions. [2021-06-05 15:03:35,903 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 473 transitions. Word has length 18 [2021-06-05 15:03:35,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:35,903 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 473 transitions. [2021-06-05 15:03:35,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:35,904 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 473 transitions. [2021-06-05 15:03:35,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:03:35,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:35,904 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:35,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 15:03:35,905 INFO L430 AbstractCegarLoop]: === Iteration 5 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:35,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:35,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1382578898, now seen corresponding path program 1 times [2021-06-05 15:03:35,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:35,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347396022] [2021-06-05 15:03:35,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:35,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:35,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347396022] [2021-06-05 15:03:35,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347396022] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:03:35,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:03:35,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 15:03:35,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456425470] [2021-06-05 15:03:35,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:03:35,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:35,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:03:35,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:03:35,944 INFO L87 Difference]: Start difference. First operand 164 states and 473 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 15:03:35,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:35,966 INFO L93 Difference]: Finished difference Result 153 states and 416 transitions. [2021-06-05 15:03:35,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:03:35,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 18 [2021-06-05 15:03:35,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:35,968 INFO L225 Difference]: With dead ends: 153 [2021-06-05 15:03:35,968 INFO L226 Difference]: Without dead ends: 137 [2021-06-05 15:03:35,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:03:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-06-05 15:03:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 133. [2021-06-05 15:03:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.7954545454545454) internal successors, (369), 132 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 15:03:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 369 transitions. [2021-06-05 15:03:35,972 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 369 transitions. Word has length 18 [2021-06-05 15:03:35,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:35,972 INFO L482 AbstractCegarLoop]: Abstraction has 133 states and 369 transitions. [2021-06-05 15:03:35,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 15:03:35,973 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 369 transitions. [2021-06-05 15:03:35,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:03:35,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:35,973 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:35,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 15:03:35,973 INFO L430 AbstractCegarLoop]: === Iteration 6 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:35,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:35,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1747969668, now seen corresponding path program 2 times [2021-06-05 15:03:35,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:35,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283441732] [2021-06-05 15:03:35,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:36,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:36,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283441732] [2021-06-05 15:03:36,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283441732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:36,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802797360] [2021-06-05 15:03:36,075 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 15:03:36,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:36,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:36,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:03:36,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:36,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802797360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:36,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:36,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 15:03:36,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118098314] [2021-06-05 15:03:36,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:03:36,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:36,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:03:36,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:03:36,191 INFO L87 Difference]: Start difference. First operand 133 states and 369 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:36,243 INFO L93 Difference]: Finished difference Result 205 states and 550 transitions. [2021-06-05 15:03:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:03:36,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 18 [2021-06-05 15:03:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:36,246 INFO L225 Difference]: With dead ends: 205 [2021-06-05 15:03:36,246 INFO L226 Difference]: Without dead ends: 205 [2021-06-05 15:03:36,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:03:36,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-05 15:03:36,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 136. [2021-06-05 15:03:36,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.837037037037037) internal successors, (383), 135 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 15:03:36,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 383 transitions. [2021-06-05 15:03:36,251 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 383 transitions. Word has length 18 [2021-06-05 15:03:36,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:36,251 INFO L482 AbstractCegarLoop]: Abstraction has 136 states and 383 transitions. [2021-06-05 15:03:36,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:36,251 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 383 transitions. [2021-06-05 15:03:36,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:03:36,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:36,252 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:36,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:36,473 INFO L430 AbstractCegarLoop]: === Iteration 7 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:36,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:36,473 INFO L82 PathProgramCache]: Analyzing trace with hash -141666181, now seen corresponding path program 2 times [2021-06-05 15:03:36,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:36,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027069608] [2021-06-05 15:03:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:36,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:36,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:36,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:36,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027069608] [2021-06-05 15:03:36,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027069608] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:03:36,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:03:36,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:03:36,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446166175] [2021-06-05 15:03:36,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:03:36,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:36,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:03:36,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:03:36,498 INFO L87 Difference]: Start difference. First operand 136 states and 383 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:36,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:36,569 INFO L93 Difference]: Finished difference Result 253 states and 641 transitions. [2021-06-05 15:03:36,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:03:36,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 18 [2021-06-05 15:03:36,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:36,571 INFO L225 Difference]: With dead ends: 253 [2021-06-05 15:03:36,571 INFO L226 Difference]: Without dead ends: 244 [2021-06-05 15:03:36,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:03:36,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-06-05 15:03:36,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 160. [2021-06-05 15:03:36,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.811320754716981) internal successors, (447), 159 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 447 transitions. [2021-06-05 15:03:36,577 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 447 transitions. Word has length 18 [2021-06-05 15:03:36,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:36,578 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 447 transitions. [2021-06-05 15:03:36,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 447 transitions. [2021-06-05 15:03:36,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:03:36,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:36,579 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:36,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 15:03:36,579 INFO L430 AbstractCegarLoop]: === Iteration 8 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:36,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:36,579 INFO L82 PathProgramCache]: Analyzing trace with hash -2044687976, now seen corresponding path program 3 times [2021-06-05 15:03:36,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:36,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389428861] [2021-06-05 15:03:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:36,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:36,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:36,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389428861] [2021-06-05 15:03:36,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389428861] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:03:36,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:03:36,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:03:36,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818966827] [2021-06-05 15:03:36,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:03:36,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:36,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:03:36,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:03:36,602 INFO L87 Difference]: Start difference. First operand 160 states and 447 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:36,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:36,657 INFO L93 Difference]: Finished difference Result 211 states and 560 transitions. [2021-06-05 15:03:36,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:03:36,658 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 18 [2021-06-05 15:03:36,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:36,659 INFO L225 Difference]: With dead ends: 211 [2021-06-05 15:03:36,659 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 15:03:36,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:03:36,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 15:03:36,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 160. [2021-06-05 15:03:36,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.792452830188679) internal successors, (444), 159 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:36,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 444 transitions. [2021-06-05 15:03:36,665 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 444 transitions. Word has length 18 [2021-06-05 15:03:36,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:36,665 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 444 transitions. [2021-06-05 15:03:36,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:36,665 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 444 transitions. [2021-06-05 15:03:36,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:03:36,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:36,666 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:36,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 15:03:36,667 INFO L430 AbstractCegarLoop]: === Iteration 9 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:36,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:36,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1877852891, now seen corresponding path program 3 times [2021-06-05 15:03:36,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:36,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001841473] [2021-06-05 15:03:36,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:36,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:36,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:36,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:36,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001841473] [2021-06-05 15:03:36,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001841473] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:03:36,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:03:36,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:03:36,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095012009] [2021-06-05 15:03:36,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:03:36,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:36,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:03:36,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:03:36,712 INFO L87 Difference]: Start difference. First operand 160 states and 444 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:36,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:36,760 INFO L93 Difference]: Finished difference Result 190 states and 515 transitions. [2021-06-05 15:03:36,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:03:36,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 18 [2021-06-05 15:03:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:36,766 INFO L225 Difference]: With dead ends: 190 [2021-06-05 15:03:36,766 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 15:03:36,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:03:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 15:03:36,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 142. [2021-06-05 15:03:36,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8085106382978724) internal successors, (396), 141 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:36,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2021-06-05 15:03:36,770 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2021-06-05 15:03:36,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:36,772 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2021-06-05 15:03:36,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:36,772 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2021-06-05 15:03:36,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:03:36,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:36,773 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:36,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 15:03:36,773 INFO L430 AbstractCegarLoop]: === Iteration 10 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:36,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:36,773 INFO L82 PathProgramCache]: Analyzing trace with hash -663824830, now seen corresponding path program 4 times [2021-06-05 15:03:36,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:36,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900671567] [2021-06-05 15:03:36,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:36,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:36,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900671567] [2021-06-05 15:03:36,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900671567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:36,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529828676] [2021-06-05 15:03:36,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:36,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:36,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:36,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:03:36,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:36,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:36,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529828676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:36,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:36,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 15:03:36,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086196196] [2021-06-05 15:03:36,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 15:03:36,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:36,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 15:03:36,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:03:36,970 INFO L87 Difference]: Start difference. First operand 142 states and 396 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:37,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:37,036 INFO L93 Difference]: Finished difference Result 193 states and 511 transitions. [2021-06-05 15:03:37,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:03:37,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 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 15:03:37,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:37,042 INFO L225 Difference]: With dead ends: 193 [2021-06-05 15:03:37,042 INFO L226 Difference]: Without dead ends: 193 [2021-06-05 15:03:37,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:03:37,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-06-05 15:03:37,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2021-06-05 15:03:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.8085106382978724) internal successors, (396), 141 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:37,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 396 transitions. [2021-06-05 15:03:37,048 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 396 transitions. Word has length 18 [2021-06-05 15:03:37,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:37,048 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 396 transitions. [2021-06-05 15:03:37,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:37,048 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 396 transitions. [2021-06-05 15:03:37,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:03:37,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:37,049 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:37,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 15:03:37,265 INFO L430 AbstractCegarLoop]: === Iteration 11 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:37,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:37,265 INFO L82 PathProgramCache]: Analyzing trace with hash 810916037, now seen corresponding path program 4 times [2021-06-05 15:03:37,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:37,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197248082] [2021-06-05 15:03:37,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:37,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:37,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197248082] [2021-06-05 15:03:37,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197248082] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:03:37,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:03:37,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:03:37,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692948657] [2021-06-05 15:03:37,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:03:37,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:37,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:03:37,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:03:37,306 INFO L87 Difference]: Start difference. First operand 142 states and 396 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:37,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:37,372 INFO L93 Difference]: Finished difference Result 197 states and 512 transitions. [2021-06-05 15:03:37,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:03:37,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 18 [2021-06-05 15:03:37,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:37,374 INFO L225 Difference]: With dead ends: 197 [2021-06-05 15:03:37,374 INFO L226 Difference]: Without dead ends: 188 [2021-06-05 15:03:37,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:03:37,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-06-05 15:03:37,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 164. [2021-06-05 15:03:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.791411042944785) internal successors, (455), 163 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 15:03:37,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 455 transitions. [2021-06-05 15:03:37,380 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 455 transitions. Word has length 18 [2021-06-05 15:03:37,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:37,380 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 455 transitions. [2021-06-05 15:03:37,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:37,380 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 455 transitions. [2021-06-05 15:03:37,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:03:37,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:37,381 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:37,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 15:03:37,381 INFO L430 AbstractCegarLoop]: === Iteration 12 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:37,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:37,382 INFO L82 PathProgramCache]: Analyzing trace with hash -951885686, now seen corresponding path program 5 times [2021-06-05 15:03:37,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:37,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808656185] [2021-06-05 15:03:37,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:37,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:37,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:37,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808656185] [2021-06-05 15:03:37,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808656185] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:03:37,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:03:37,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:03:37,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954953493] [2021-06-05 15:03:37,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:03:37,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:37,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:03:37,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:03:37,405 INFO L87 Difference]: Start difference. First operand 164 states and 455 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:37,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:37,500 INFO L93 Difference]: Finished difference Result 248 states and 641 transitions. [2021-06-05 15:03:37,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:03:37,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 18 [2021-06-05 15:03:37,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:37,502 INFO L225 Difference]: With dead ends: 248 [2021-06-05 15:03:37,502 INFO L226 Difference]: Without dead ends: 245 [2021-06-05 15:03:37,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:03:37,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-06-05 15:03:37,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 164. [2021-06-05 15:03:37,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.773006134969325) internal successors, (452), 163 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 452 transitions. [2021-06-05 15:03:37,508 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 452 transitions. Word has length 18 [2021-06-05 15:03:37,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:37,508 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 452 transitions. [2021-06-05 15:03:37,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:37,509 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 452 transitions. [2021-06-05 15:03:37,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:03:37,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:37,509 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:37,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 15:03:37,510 INFO L430 AbstractCegarLoop]: === Iteration 13 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:37,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:37,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1324312115, now seen corresponding path program 5 times [2021-06-05 15:03:37,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:37,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427847566] [2021-06-05 15:03:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:37,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:37,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:37,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427847566] [2021-06-05 15:03:37,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427847566] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:03:37,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:03:37,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:03:37,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804915688] [2021-06-05 15:03:37,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:03:37,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:37,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:03:37,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:03:37,533 INFO L87 Difference]: Start difference. First operand 164 states and 452 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:37,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:37,588 INFO L93 Difference]: Finished difference Result 190 states and 503 transitions. [2021-06-05 15:03:37,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:03:37,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 18 [2021-06-05 15:03:37,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:37,595 INFO L225 Difference]: With dead ends: 190 [2021-06-05 15:03:37,596 INFO L226 Difference]: Without dead ends: 190 [2021-06-05 15:03:37,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:03:37,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-06-05 15:03:37,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 161. [2021-06-05 15:03:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.775) internal successors, (444), 160 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:37,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 444 transitions. [2021-06-05 15:03:37,611 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 444 transitions. Word has length 18 [2021-06-05 15:03:37,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:37,611 INFO L482 AbstractCegarLoop]: Abstraction has 161 states and 444 transitions. [2021-06-05 15:03:37,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 444 transitions. [2021-06-05 15:03:37,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:03:37,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:37,614 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:37,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 15:03:37,614 INFO L430 AbstractCegarLoop]: === Iteration 14 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:37,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:37,614 INFO L82 PathProgramCache]: Analyzing trace with hash 11936556, now seen corresponding path program 6 times [2021-06-05 15:03:37,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:37,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933914258] [2021-06-05 15:03:37,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:37,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:37,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933914258] [2021-06-05 15:03:37,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933914258] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:03:37,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:03:37,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:03:37,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56013905] [2021-06-05 15:03:37,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:03:37,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:37,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:03:37,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:03:37,648 INFO L87 Difference]: Start difference. First operand 161 states and 444 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:37,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:37,702 INFO L93 Difference]: Finished difference Result 164 states and 446 transitions. [2021-06-05 15:03:37,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:03:37,703 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 18 [2021-06-05 15:03:37,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:37,704 INFO L225 Difference]: With dead ends: 164 [2021-06-05 15:03:37,704 INFO L226 Difference]: Without dead ends: 160 [2021-06-05 15:03:37,704 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:03:37,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-05 15:03:37,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-06-05 15:03:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.779874213836478) internal successors, (442), 159 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 15:03:37,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 442 transitions. [2021-06-05 15:03:37,709 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 442 transitions. Word has length 18 [2021-06-05 15:03:37,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:37,709 INFO L482 AbstractCegarLoop]: Abstraction has 160 states and 442 transitions. [2021-06-05 15:03:37,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:37,710 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 442 transitions. [2021-06-05 15:03:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 15:03:37,711 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:37,711 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:37,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 15:03:37,711 INFO L430 AbstractCegarLoop]: === Iteration 15 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:37,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:37,712 INFO L82 PathProgramCache]: Analyzing trace with hash 459545933, now seen corresponding path program 6 times [2021-06-05 15:03:37,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:37,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326881467] [2021-06-05 15:03:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:37,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:37,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326881467] [2021-06-05 15:03:37,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326881467] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:03:37,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:03:37,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:03:37,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085726312] [2021-06-05 15:03:37,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:03:37,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:37,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:03:37,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:03:37,767 INFO L87 Difference]: Start difference. First operand 160 states and 442 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:37,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:37,810 INFO L93 Difference]: Finished difference Result 153 states and 422 transitions. [2021-06-05 15:03:37,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:03:37,811 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 18 [2021-06-05 15:03:37,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:37,811 INFO L225 Difference]: With dead ends: 153 [2021-06-05 15:03:37,812 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 15:03:37,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:03:37,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 15:03:37,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 135. [2021-06-05 15:03:37,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.791044776119403) internal successors, (374), 134 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 15:03:37,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 374 transitions. [2021-06-05 15:03:37,818 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 374 transitions. Word has length 18 [2021-06-05 15:03:37,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:37,818 INFO L482 AbstractCegarLoop]: Abstraction has 135 states and 374 transitions. [2021-06-05 15:03:37,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 15:03:37,818 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 374 transitions. [2021-06-05 15:03:37,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:37,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:37,819 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:37,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 15:03:37,819 INFO L430 AbstractCegarLoop]: === Iteration 16 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:37,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:37,820 INFO L82 PathProgramCache]: Analyzing trace with hash 442648773, now seen corresponding path program 1 times [2021-06-05 15:03:37,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:37,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299947254] [2021-06-05 15:03:37,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:37,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:37,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299947254] [2021-06-05 15:03:37,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299947254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:37,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619610755] [2021-06-05 15:03:37,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:37,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:37,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:38,133 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 16 treesize of output 10 [2021-06-05 15:03:38,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:38,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:38,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:38,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:10 [2021-06-05 15:03:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:38,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619610755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:38,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:38,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 15:03:38,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898324094] [2021-06-05 15:03:38,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:38,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:38,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:38,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:38,190 INFO L87 Difference]: Start difference. First operand 135 states and 374 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 15:03:38,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:38,653 INFO L93 Difference]: Finished difference Result 382 states and 1086 transitions. [2021-06-05 15:03:38,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:03:38,653 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) Word has length 20 [2021-06-05 15:03:38,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:38,656 INFO L225 Difference]: With dead ends: 382 [2021-06-05 15:03:38,656 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 15:03:38,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 281.2ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:38,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 15:03:38,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 186. [2021-06-05 15:03:38,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.8162162162162163) internal successors, (521), 185 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 521 transitions. [2021-06-05 15:03:38,663 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 521 transitions. Word has length 20 [2021-06-05 15:03:38,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:38,663 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 521 transitions. [2021-06-05 15:03:38,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 15:03:38,663 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 521 transitions. [2021-06-05 15:03:38,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:38,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:38,664 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:38,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:38,885 INFO L430 AbstractCegarLoop]: === Iteration 17 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:38,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:38,885 INFO L82 PathProgramCache]: Analyzing trace with hash 600946541, now seen corresponding path program 2 times [2021-06-05 15:03:38,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:38,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259062632] [2021-06-05 15:03:38,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:38,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:38,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259062632] [2021-06-05 15:03:38,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259062632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:38,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129483080] [2021-06-05 15:03:38,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:39,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:39,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:39,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:39,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:39,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:39,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:39,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:39,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:39,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:39,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:20 [2021-06-05 15:03:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:39,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129483080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:39,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:39,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 15:03:39,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633538671] [2021-06-05 15:03:39,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:03:39,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:39,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:03:39,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:39,372 INFO L87 Difference]: Start difference. First operand 186 states and 521 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:40,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:40,433 INFO L93 Difference]: Finished difference Result 399 states and 1155 transitions. [2021-06-05 15:03:40,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:03:40,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:03:40,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:40,435 INFO L225 Difference]: With dead ends: 399 [2021-06-05 15:03:40,435 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 15:03:40,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 796.8ms TimeCoverageRelationStatistics Valid=219, Invalid=1041, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:03:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 15:03:40,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 189. [2021-06-05 15:03:40,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.8191489361702127) internal successors, (530), 188 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:40,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 530 transitions. [2021-06-05 15:03:40,442 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 530 transitions. Word has length 20 [2021-06-05 15:03:40,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:40,442 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 530 transitions. [2021-06-05 15:03:40,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:40,443 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 530 transitions. [2021-06-05 15:03:40,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:40,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:40,443 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:40,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 15:03:40,649 INFO L430 AbstractCegarLoop]: === Iteration 18 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:40,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:40,649 INFO L82 PathProgramCache]: Analyzing trace with hash 424405109, now seen corresponding path program 3 times [2021-06-05 15:03:40,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:40,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368997684] [2021-06-05 15:03:40,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:40,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:40,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:40,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368997684] [2021-06-05 15:03:40,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368997684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:40,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566969090] [2021-06-05 15:03:40,786 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 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 15:03:40,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:03:40,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:40,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:40,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:40,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:40,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:40,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:40,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:40,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:40,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:41,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566969090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:41,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:41,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 15:03:41,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888587307] [2021-06-05 15:03:41,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:03:41,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:41,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:03:41,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:41,064 INFO L87 Difference]: Start difference. First operand 189 states and 530 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:41,941 INFO L93 Difference]: Finished difference Result 363 states and 1048 transitions. [2021-06-05 15:03:41,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:03:41,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:03:41,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:41,943 INFO L225 Difference]: With dead ends: 363 [2021-06-05 15:03:41,943 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 15:03:41,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 701.0ms TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:03:41,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 15:03:41,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 192. [2021-06-05 15:03:41,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.8219895287958114) internal successors, (539), 191 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 539 transitions. [2021-06-05 15:03:41,950 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 539 transitions. Word has length 20 [2021-06-05 15:03:41,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:41,950 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 539 transitions. [2021-06-05 15:03:41,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,950 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 539 transitions. [2021-06-05 15:03:41,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:41,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:41,951 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:42,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:42,174 INFO L430 AbstractCegarLoop]: === Iteration 19 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:42,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:42,174 INFO L82 PathProgramCache]: Analyzing trace with hash -409333331, now seen corresponding path program 4 times [2021-06-05 15:03:42,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:42,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265477178] [2021-06-05 15:03:42,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:42,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:42,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:42,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:42,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265477178] [2021-06-05 15:03:42,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265477178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:42,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900837722] [2021-06-05 15:03:42,307 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:42,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:42,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:42,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:42,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:42,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:42,456 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:42,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:42,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:42,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:42,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:42,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900837722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:42,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:42,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:03:42,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450985094] [2021-06-05 15:03:42,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:42,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:42,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:42,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:42,532 INFO L87 Difference]: Start difference. First operand 192 states and 539 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:43,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:43,053 INFO L93 Difference]: Finished difference Result 310 states and 882 transitions. [2021-06-05 15:03:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:03:43,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 20 [2021-06-05 15:03:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:43,055 INFO L225 Difference]: With dead ends: 310 [2021-06-05 15:03:43,055 INFO L226 Difference]: Without dead ends: 298 [2021-06-05 15:03:43,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 403.1ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:43,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-06-05 15:03:43,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 210. [2021-06-05 15:03:43,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.875598086124402) internal successors, (601), 209 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:43,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 601 transitions. [2021-06-05 15:03:43,061 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 601 transitions. Word has length 20 [2021-06-05 15:03:43,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:43,061 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 601 transitions. [2021-06-05 15:03:43,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:43,061 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 601 transitions. [2021-06-05 15:03:43,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:43,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:43,062 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:43,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:43,285 INFO L430 AbstractCegarLoop]: === Iteration 20 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:43,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:43,285 INFO L82 PathProgramCache]: Analyzing trace with hash -908838833, now seen corresponding path program 1 times [2021-06-05 15:03:43,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:43,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329245868] [2021-06-05 15:03:43,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:43,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:43,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329245868] [2021-06-05 15:03:43,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329245868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:43,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763666556] [2021-06-05 15:03:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:43,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:43,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:43,497 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 16 treesize of output 10 [2021-06-05 15:03:43,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:43,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:43,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:43,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:10 [2021-06-05 15:03:43,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:43,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763666556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:43,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:43,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-06-05 15:03:43,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134865857] [2021-06-05 15:03:43,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:43,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:43,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:43,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:43,535 INFO L87 Difference]: Start difference. First operand 210 states and 601 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:43,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:43,942 INFO L93 Difference]: Finished difference Result 423 states and 1216 transitions. [2021-06-05 15:03:43,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:03:43,943 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 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 20 [2021-06-05 15:03:43,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:43,945 INFO L225 Difference]: With dead ends: 423 [2021-06-05 15:03:43,945 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 15:03:43,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:43,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 15:03:43,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 216. [2021-06-05 15:03:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.8883720930232557) internal successors, (621), 215 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 621 transitions. [2021-06-05 15:03:43,952 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 621 transitions. Word has length 20 [2021-06-05 15:03:43,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:43,952 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 621 transitions. [2021-06-05 15:03:43,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:43,953 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 621 transitions. [2021-06-05 15:03:43,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:43,953 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:43,953 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:44,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 15:03:44,176 INFO L430 AbstractCegarLoop]: === Iteration 21 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:44,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:44,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1199871497, now seen corresponding path program 2 times [2021-06-05 15:03:44,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:44,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427886869] [2021-06-05 15:03:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:44,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:44,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427886869] [2021-06-05 15:03:44,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427886869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:44,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233055268] [2021-06-05 15:03:44,263 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:44,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:44,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:44,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:44,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:44,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:44,464 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:03:44,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:44,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:44,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:44,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:03:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:44,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233055268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:44,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:44,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:03:44,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860452405] [2021-06-05 15:03:44,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:44,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:44,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:44,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:44,510 INFO L87 Difference]: Start difference. First operand 216 states and 621 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:44,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:44,841 INFO L93 Difference]: Finished difference Result 332 states and 961 transitions. [2021-06-05 15:03:44,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:03:44,841 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 20 [2021-06-05 15:03:44,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:44,845 INFO L225 Difference]: With dead ends: 332 [2021-06-05 15:03:44,845 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 15:03:44,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:03:44,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 15:03:44,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 219. [2021-06-05 15:03:44,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.8944954128440368) internal successors, (631), 218 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:44,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 631 transitions. [2021-06-05 15:03:44,852 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 631 transitions. Word has length 20 [2021-06-05 15:03:44,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:44,852 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 631 transitions. [2021-06-05 15:03:44,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:44,852 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 631 transitions. [2021-06-05 15:03:44,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:44,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:44,853 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:45,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:45,076 INFO L430 AbstractCegarLoop]: === Iteration 22 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:45,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:45,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2066945939, now seen corresponding path program 3 times [2021-06-05 15:03:45,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:45,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424506200] [2021-06-05 15:03:45,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:45,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:45,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424506200] [2021-06-05 15:03:45,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424506200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:45,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910221423] [2021-06-05 15:03:45,162 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:45,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:03:45,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:45,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:45,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:45,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:45,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:45,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:45,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:45,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:45,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 15:03:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:45,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910221423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:45,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:45,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 15:03:45,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052548619] [2021-06-05 15:03:45,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:45,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:45,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:45,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:45,457 INFO L87 Difference]: Start difference. First operand 219 states and 631 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:46,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:46,013 INFO L93 Difference]: Finished difference Result 343 states and 998 transitions. [2021-06-05 15:03:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:03:46,013 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 20 [2021-06-05 15:03:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:46,015 INFO L225 Difference]: With dead ends: 343 [2021-06-05 15:03:46,015 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 15:03:46,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 443.9ms TimeCoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:03:46,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 15:03:46,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 222. [2021-06-05 15:03:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.9004524886877827) internal successors, (641), 221 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:46,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 641 transitions. [2021-06-05 15:03:46,022 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 641 transitions. Word has length 20 [2021-06-05 15:03:46,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:46,022 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 641 transitions. [2021-06-05 15:03:46,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 641 transitions. [2021-06-05 15:03:46,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:46,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:46,023 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:46,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:46,241 INFO L430 AbstractCegarLoop]: === Iteration 23 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:46,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:46,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1904435179, now seen corresponding path program 4 times [2021-06-05 15:03:46,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:46,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271331782] [2021-06-05 15:03:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:46,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:46,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271331782] [2021-06-05 15:03:46,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271331782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:46,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304995202] [2021-06-05 15:03:46,323 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 15:03:46,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:46,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:46,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:46,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:46,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:46,448 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:46,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:46,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:46,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:46,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:46,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:46,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304995202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:46,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:46,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:46,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868953938] [2021-06-05 15:03:46,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:46,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:46,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:46,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:46,510 INFO L87 Difference]: Start difference. First operand 222 states and 641 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 15:03:46,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:46,792 INFO L93 Difference]: Finished difference Result 318 states and 927 transitions. [2021-06-05 15:03:46,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:03:46,792 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 20 [2021-06-05 15:03:46,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:46,794 INFO L225 Difference]: With dead ends: 318 [2021-06-05 15:03:46,794 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 15:03:46,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 215.2ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:46,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 15:03:46,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 224. [2021-06-05 15:03:46,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.905829596412556) internal successors, (648), 223 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 648 transitions. [2021-06-05 15:03:46,800 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 648 transitions. Word has length 20 [2021-06-05 15:03:46,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:46,800 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 648 transitions. [2021-06-05 15:03:46,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 15:03:46,800 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 648 transitions. [2021-06-05 15:03:46,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:46,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:46,801 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:47,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 15:03:47,002 INFO L430 AbstractCegarLoop]: === Iteration 24 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:47,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:47,002 INFO L82 PathProgramCache]: Analyzing trace with hash -453703043, now seen corresponding path program 5 times [2021-06-05 15:03:47,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:47,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471833869] [2021-06-05 15:03:47,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:47,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:47,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471833869] [2021-06-05 15:03:47,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471833869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:47,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433080974] [2021-06-05 15:03:47,089 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:47,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:47,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:47,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:47,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:47,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:47,256 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:03:47,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:47,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:47,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:47,267 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:03:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:47,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433080974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:47,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:47,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:03:47,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960701300] [2021-06-05 15:03:47,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:47,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:47,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:47,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:47,298 INFO L87 Difference]: Start difference. First operand 224 states and 648 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:47,572 INFO L93 Difference]: Finished difference Result 328 states and 946 transitions. [2021-06-05 15:03:47,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:47,572 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 20 [2021-06-05 15:03:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:47,574 INFO L225 Difference]: With dead ends: 328 [2021-06-05 15:03:47,574 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 15:03:47,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 193.8ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:47,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 15:03:47,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 224. [2021-06-05 15:03:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.905829596412556) internal successors, (648), 223 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 648 transitions. [2021-06-05 15:03:47,580 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 648 transitions. Word has length 20 [2021-06-05 15:03:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:47,580 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 648 transitions. [2021-06-05 15:03:47,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:47,581 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 648 transitions. [2021-06-05 15:03:47,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:47,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:47,581 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:47,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:47,804 INFO L430 AbstractCegarLoop]: === Iteration 25 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:47,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:47,805 INFO L82 PathProgramCache]: Analyzing trace with hash -236278157, now seen corresponding path program 6 times [2021-06-05 15:03:47,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:47,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586958678] [2021-06-05 15:03:47,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:47,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:47,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586958678] [2021-06-05 15:03:47,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586958678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:47,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268358922] [2021-06-05 15:03:47,925 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:47,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:03:47,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:47,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:47,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:48,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:48,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:48,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:48,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:48,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:48,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:48,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268358922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:48,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:48,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 15:03:48,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353439869] [2021-06-05 15:03:48,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:03:48,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:48,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:03:48,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:48,178 INFO L87 Difference]: Start difference. First operand 224 states and 648 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:49,086 INFO L93 Difference]: Finished difference Result 462 states and 1347 transitions. [2021-06-05 15:03:49,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:03:49,087 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:03:49,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:49,089 INFO L225 Difference]: With dead ends: 462 [2021-06-05 15:03:49,089 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 15:03:49,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 785.3ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:03:49,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 15:03:49,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 235. [2021-06-05 15:03:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.965811965811966) internal successors, (694), 234 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 694 transitions. [2021-06-05 15:03:49,097 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 694 transitions. Word has length 20 [2021-06-05 15:03:49,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:49,097 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 694 transitions. [2021-06-05 15:03:49,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,097 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 694 transitions. [2021-06-05 15:03:49,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:49,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:49,098 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:49,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 15:03:49,309 INFO L430 AbstractCegarLoop]: === Iteration 26 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:49,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:49,309 INFO L82 PathProgramCache]: Analyzing trace with hash 188465799, now seen corresponding path program 5 times [2021-06-05 15:03:49,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:49,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754336341] [2021-06-05 15:03:49,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:49,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:49,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754336341] [2021-06-05 15:03:49,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754336341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:49,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993722599] [2021-06-05 15:03:49,397 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:49,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:49,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:49,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:49,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:49,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:49,554 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:03:49,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:49,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:49,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:49,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:03:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:49,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993722599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:49,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:49,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:03:49,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058822416] [2021-06-05 15:03:49,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:49,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:49,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:49,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:49,592 INFO L87 Difference]: Start difference. First operand 235 states and 694 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:49,790 INFO L93 Difference]: Finished difference Result 327 states and 955 transitions. [2021-06-05 15:03:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:49,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 20 [2021-06-05 15:03:49,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:49,792 INFO L225 Difference]: With dead ends: 327 [2021-06-05 15:03:49,792 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 15:03:49,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 175.1ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:49,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 15:03:49,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 238. [2021-06-05 15:03:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.970464135021097) internal successors, (704), 237 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 704 transitions. [2021-06-05 15:03:49,798 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 704 transitions. Word has length 20 [2021-06-05 15:03:49,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:49,799 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 704 transitions. [2021-06-05 15:03:49,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,799 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 704 transitions. [2021-06-05 15:03:49,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:49,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:49,799 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:50,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:50,013 INFO L430 AbstractCegarLoop]: === Iteration 27 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:50,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:50,013 INFO L82 PathProgramCache]: Analyzing trace with hash -839684061, now seen corresponding path program 6 times [2021-06-05 15:03:50,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:50,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174517385] [2021-06-05 15:03:50,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:50,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:50,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174517385] [2021-06-05 15:03:50,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174517385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:50,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577438681] [2021-06-05 15:03:50,083 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:50,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:03:50,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:50,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:50,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:50,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:50,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:50,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:50,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:50,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:50,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:38 [2021-06-05 15:03:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:50,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577438681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:50,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:50,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 15:03:50,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212073670] [2021-06-05 15:03:50,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:50,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:50,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:50,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:50,360 INFO L87 Difference]: Start difference. First operand 238 states and 704 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:50,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:50,858 INFO L93 Difference]: Finished difference Result 341 states and 1001 transitions. [2021-06-05 15:03:50,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:03:50,858 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 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 20 [2021-06-05 15:03:50,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:50,859 INFO L225 Difference]: With dead ends: 341 [2021-06-05 15:03:50,859 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 15:03:50,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 506.8ms TimeCoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:03:50,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 15:03:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 241. [2021-06-05 15:03:50,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.975) internal successors, (714), 240 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:50,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 714 transitions. [2021-06-05 15:03:50,865 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 714 transitions. Word has length 20 [2021-06-05 15:03:50,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:50,865 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 714 transitions. [2021-06-05 15:03:50,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 714 transitions. [2021-06-05 15:03:50,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:50,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:50,866 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:51,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 15:03:51,089 INFO L430 AbstractCegarLoop]: === Iteration 28 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:51,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:51,089 INFO L82 PathProgramCache]: Analyzing trace with hash -516097883, now seen corresponding path program 7 times [2021-06-05 15:03:51,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:51,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887965645] [2021-06-05 15:03:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:51,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:51,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:51,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887965645] [2021-06-05 15:03:51,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887965645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:51,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994230705] [2021-06-05 15:03:51,171 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:51,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:51,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:51,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:51,271 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:51,272 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:51,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:51,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:51,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:51,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994230705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:51,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:51,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:51,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817495802] [2021-06-05 15:03:51,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:51,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:51,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:51,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:51,331 INFO L87 Difference]: Start difference. First operand 241 states and 714 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 15:03:51,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:51,485 INFO L93 Difference]: Finished difference Result 310 states and 911 transitions. [2021-06-05 15:03:51,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:03:51,486 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 20 [2021-06-05 15:03:51,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:51,487 INFO L225 Difference]: With dead ends: 310 [2021-06-05 15:03:51,487 INFO L226 Difference]: Without dead ends: 299 [2021-06-05 15:03:51,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 181.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:51,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-06-05 15:03:51,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 235. [2021-06-05 15:03:51,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.965811965811966) internal successors, (694), 234 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:51,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 694 transitions. [2021-06-05 15:03:51,492 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 694 transitions. Word has length 20 [2021-06-05 15:03:51,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:51,492 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 694 transitions. [2021-06-05 15:03:51,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 15:03:51,492 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 694 transitions. [2021-06-05 15:03:51,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:51,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:51,493 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:51,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 15:03:51,716 INFO L430 AbstractCegarLoop]: === Iteration 29 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:51,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:51,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1628624025, now seen corresponding path program 7 times [2021-06-05 15:03:51,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:51,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266880442] [2021-06-05 15:03:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:51,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:51,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:51,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:51,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266880442] [2021-06-05 15:03:51,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266880442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:51,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386342371] [2021-06-05 15:03:51,836 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:51,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:51,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:51,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:51,935 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:51,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:51,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:51,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:51,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:51,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386342371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:51,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:51,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:03:51,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546909397] [2021-06-05 15:03:51,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:51,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:51,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:51,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:51,997 INFO L87 Difference]: Start difference. First operand 235 states and 694 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:52,248 INFO L93 Difference]: Finished difference Result 350 states and 1025 transitions. [2021-06-05 15:03:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:03:52,248 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 20 [2021-06-05 15:03:52,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:52,249 INFO L225 Difference]: With dead ends: 350 [2021-06-05 15:03:52,250 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 15:03:52,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 15:03:52,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 246. [2021-06-05 15:03:52,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 3.012244897959184) internal successors, (738), 245 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 738 transitions. [2021-06-05 15:03:52,257 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 738 transitions. Word has length 20 [2021-06-05 15:03:52,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:52,257 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 738 transitions. [2021-06-05 15:03:52,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,257 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 738 transitions. [2021-06-05 15:03:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:52,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:52,258 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:52,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 15:03:52,473 INFO L430 AbstractCegarLoop]: === Iteration 30 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:52,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:52,473 INFO L82 PathProgramCache]: Analyzing trace with hash -162237149, now seen corresponding path program 8 times [2021-06-05 15:03:52,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:52,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7978803] [2021-06-05 15:03:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:52,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:52,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7978803] [2021-06-05 15:03:52,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7978803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:52,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334127773] [2021-06-05 15:03:52,564 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:52,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:52,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:52,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:52,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:52,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:52,649 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:52,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:52,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:52,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:52,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:52,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:52,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334127773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:52,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:52,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:52,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10544279] [2021-06-05 15:03:52,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:52,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:52,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:52,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:52,709 INFO L87 Difference]: Start difference. First operand 246 states and 738 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 15:03:52,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:52,941 INFO L93 Difference]: Finished difference Result 351 states and 1041 transitions. [2021-06-05 15:03:52,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:03:52,942 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 20 [2021-06-05 15:03:52,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:52,943 INFO L225 Difference]: With dead ends: 351 [2021-06-05 15:03:52,943 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 15:03:52,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:52,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 15:03:52,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 256. [2021-06-05 15:03:52,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.062745098039216) internal successors, (781), 255 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 781 transitions. [2021-06-05 15:03:52,949 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 781 transitions. Word has length 20 [2021-06-05 15:03:52,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:52,949 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 781 transitions. [2021-06-05 15:03:52,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 15:03:52,950 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 781 transitions. [2021-06-05 15:03:52,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:52,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:52,950 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:53,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 15:03:53,165 INFO L430 AbstractCegarLoop]: === Iteration 31 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:53,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:53,165 INFO L82 PathProgramCache]: Analyzing trace with hash -428870833, now seen corresponding path program 8 times [2021-06-05 15:03:53,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:53,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450736930] [2021-06-05 15:03:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:53,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:53,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450736930] [2021-06-05 15:03:53,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450736930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:53,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163875354] [2021-06-05 15:03:53,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:53,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:53,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:53,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:53,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:53,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:53,323 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:53,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:53,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:53,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:53,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:03:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:53,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163875354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:53,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:53,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:53,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908893910] [2021-06-05 15:03:53,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:53,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:53,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:53,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:53,383 INFO L87 Difference]: Start difference. First operand 256 states and 781 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:53,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:53,571 INFO L93 Difference]: Finished difference Result 333 states and 1000 transitions. [2021-06-05 15:03:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:03:53,571 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 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 20 [2021-06-05 15:03:53,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:53,572 INFO L225 Difference]: With dead ends: 333 [2021-06-05 15:03:53,572 INFO L226 Difference]: Without dead ends: 324 [2021-06-05 15:03:53,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:03:53,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-06-05 15:03:53,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 259. [2021-06-05 15:03:53,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 3.065891472868217) internal successors, (791), 258 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 15:03:53,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 791 transitions. [2021-06-05 15:03:53,587 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 791 transitions. Word has length 20 [2021-06-05 15:03:53,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:53,587 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 791 transitions. [2021-06-05 15:03:53,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:53,587 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 791 transitions. [2021-06-05 15:03:53,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:53,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:53,588 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:53,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:53,802 INFO L430 AbstractCegarLoop]: === Iteration 32 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:53,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:53,803 INFO L82 PathProgramCache]: Analyzing trace with hash -105284655, now seen corresponding path program 9 times [2021-06-05 15:03:53,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:53,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869030821] [2021-06-05 15:03:53,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:53,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:53,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869030821] [2021-06-05 15:03:53,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869030821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:53,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001749574] [2021-06-05 15:03:53,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:53,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:53,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:53,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:53,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:54,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:54,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:54,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:54,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:54,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:54,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:54,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:54,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001749574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:54,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:54,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:03:54,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882119081] [2021-06-05 15:03:54,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:54,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:54,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:54,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:54,162 INFO L87 Difference]: Start difference. First operand 259 states and 791 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:54,864 INFO L93 Difference]: Finished difference Result 353 states and 1060 transitions. [2021-06-05 15:03:54,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:03:54,864 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 15:03:54,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:54,865 INFO L225 Difference]: With dead ends: 353 [2021-06-05 15:03:54,865 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 15:03:54,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 582.0ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:03:54,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 15:03:54,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 256. [2021-06-05 15:03:54,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 3.062745098039216) internal successors, (781), 255 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:54,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 781 transitions. [2021-06-05 15:03:54,871 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 781 transitions. Word has length 20 [2021-06-05 15:03:54,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:54,872 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 781 transitions. [2021-06-05 15:03:54,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:54,872 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 781 transitions. [2021-06-05 15:03:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:54,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:54,873 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:55,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 15:03:55,077 INFO L430 AbstractCegarLoop]: === Iteration 33 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:55,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:55,077 INFO L82 PathProgramCache]: Analyzing trace with hash 431638013, now seen corresponding path program 9 times [2021-06-05 15:03:55,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:55,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251702917] [2021-06-05 15:03:55,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:55,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:55,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251702917] [2021-06-05 15:03:55,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251702917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:55,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467405376] [2021-06-05 15:03:55,181 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:55,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:55,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:55,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:55,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:55,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:55,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:55,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:55,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:55,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:55,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:23 [2021-06-05 15:03:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:55,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467405376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:55,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:55,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:03:55,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723391684] [2021-06-05 15:03:55,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:55,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:55,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:55,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:55,434 INFO L87 Difference]: Start difference. First operand 256 states and 781 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:56,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:56,350 INFO L93 Difference]: Finished difference Result 485 states and 1380 transitions. [2021-06-05 15:03:56,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:03:56,350 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 15:03:56,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:56,352 INFO L225 Difference]: With dead ends: 485 [2021-06-05 15:03:56,352 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 15:03:56,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 689.0ms TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:03:56,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 15:03:56,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 293. [2021-06-05 15:03:56,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 3.095890410958904) internal successors, (904), 292 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:56,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 904 transitions. [2021-06-05 15:03:56,359 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 904 transitions. Word has length 20 [2021-06-05 15:03:56,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:56,359 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 904 transitions. [2021-06-05 15:03:56,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:56,359 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 904 transitions. [2021-06-05 15:03:56,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:56,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:56,360 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:56,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 15:03:56,581 INFO L430 AbstractCegarLoop]: === Iteration 34 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:56,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:56,581 INFO L82 PathProgramCache]: Analyzing trace with hash 226719879, now seen corresponding path program 10 times [2021-06-05 15:03:56,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:56,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121044696] [2021-06-05 15:03:56,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:56,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:56,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:56,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121044696] [2021-06-05 15:03:56,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121044696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:56,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920459639] [2021-06-05 15:03:56,683 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:56,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:56,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:56,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:56,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:56,788 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:56,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:56,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:56,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:56,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 15:03:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:56,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920459639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:56,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:56,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:03:56,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468482502] [2021-06-05 15:03:56,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:03:56,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:56,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:03:56,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:03:56,840 INFO L87 Difference]: Start difference. First operand 293 states and 904 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 15:03:57,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:57,037 INFO L93 Difference]: Finished difference Result 371 states and 1128 transitions. [2021-06-05 15:03:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:03:57,038 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 20 [2021-06-05 15:03:57,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:57,039 INFO L225 Difference]: With dead ends: 371 [2021-06-05 15:03:57,039 INFO L226 Difference]: Without dead ends: 360 [2021-06-05 15:03:57,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:03:57,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-06-05 15:03:57,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 295. [2021-06-05 15:03:57,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 3.0884353741496597) internal successors, (908), 294 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:57,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 908 transitions. [2021-06-05 15:03:57,047 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 908 transitions. Word has length 20 [2021-06-05 15:03:57,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:57,047 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 908 transitions. [2021-06-05 15:03:57,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 12 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 15:03:57,047 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 908 transitions. [2021-06-05 15:03:57,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:57,048 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:57,048 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:57,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:57,269 INFO L430 AbstractCegarLoop]: === Iteration 35 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:57,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:57,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2027400643, now seen corresponding path program 10 times [2021-06-05 15:03:57,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:57,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246249636] [2021-06-05 15:03:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:57,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:57,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246249636] [2021-06-05 15:03:57,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246249636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:57,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3667553] [2021-06-05 15:03:57,356 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:57,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:57,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:57,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:03:57,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:57,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:57,479 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:57,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:57,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:57,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:57,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 15:03:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:57,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3667553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:57,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:57,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:03:57,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206503353] [2021-06-05 15:03:57,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:03:57,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:57,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:03:57,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:03:57,519 INFO L87 Difference]: Start difference. First operand 295 states and 908 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 15:03:57,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:57,749 INFO L93 Difference]: Finished difference Result 412 states and 1240 transitions. [2021-06-05 15:03:57,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:03:57,749 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 20 [2021-06-05 15:03:57,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:57,751 INFO L225 Difference]: With dead ends: 412 [2021-06-05 15:03:57,751 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 15:03:57,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:03:57,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 15:03:57,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 298. [2021-06-05 15:03:57,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0875420875420874) internal successors, (917), 297 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:57,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 917 transitions. [2021-06-05 15:03:57,757 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 917 transitions. Word has length 20 [2021-06-05 15:03:57,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:57,757 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 917 transitions. [2021-06-05 15:03:57,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 15:03:57,757 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 917 transitions. [2021-06-05 15:03:57,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:57,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:57,758 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:57,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-05 15:03:57,981 INFO L430 AbstractCegarLoop]: === Iteration 36 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:57,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:57,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1645911141, now seen corresponding path program 11 times [2021-06-05 15:03:57,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:57,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95894333] [2021-06-05 15:03:57,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:58,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:58,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95894333] [2021-06-05 15:03:58,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95894333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:58,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420215295] [2021-06-05 15:03:58,085 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:58,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:58,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:58,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:58,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:58,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:58,209 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:03:58,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:58,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:58,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:58,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:10 [2021-06-05 15:03:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:58,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420215295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:58,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:58,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 15:03:58,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992165584] [2021-06-05 15:03:58,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:58,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:58,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:58,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:58,271 INFO L87 Difference]: Start difference. First operand 298 states and 917 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 15:03:58,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:58,740 INFO L93 Difference]: Finished difference Result 460 states and 1382 transitions. [2021-06-05 15:03:58,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:03:58,740 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 15:03:58,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:58,742 INFO L225 Difference]: With dead ends: 460 [2021-06-05 15:03:58,742 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 15:03:58,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 405.9ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:03:58,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 15:03:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 298. [2021-06-05 15:03:58,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 3.0875420875420874) internal successors, (917), 297 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:58,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 917 transitions. [2021-06-05 15:03:58,749 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 917 transitions. Word has length 20 [2021-06-05 15:03:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:58,750 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 917 transitions. [2021-06-05 15:03:58,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 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 15:03:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 917 transitions. [2021-06-05 15:03:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:03:58,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:58,751 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:58,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:58,969 INFO L430 AbstractCegarLoop]: === Iteration 37 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:03:58,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:58,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1815317715, now seen corresponding path program 12 times [2021-06-05 15:03:58,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:58,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514492650] [2021-06-05 15:03:58,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:59,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:03:59,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:59,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514492650] [2021-06-05 15:03:59,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514492650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:59,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310863030] [2021-06-05 15:03:59,080 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:59,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:03:59,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:59,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:03:59,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:59,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:59,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:03:59,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:59,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:59,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:59,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:03:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:59,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310863030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:59,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:59,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:03:59,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73515783] [2021-06-05 15:03:59,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:03:59,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:59,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:03:59,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:03:59,318 INFO L87 Difference]: Start difference. First operand 298 states and 917 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 15:04:00,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:00,042 INFO L93 Difference]: Finished difference Result 552 states and 1617 transitions. [2021-06-05 15:04:00,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:04:00,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 15:04:00,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:00,044 INFO L225 Difference]: With dead ends: 552 [2021-06-05 15:04:00,044 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 15:04:00,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 639.4ms TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:04:00,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 15:04:00,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 306. [2021-06-05 15:04:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1180327868852458) internal successors, (951), 305 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:00,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-06-05 15:04:00,051 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-06-05 15:04:00,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:00,051 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-06-05 15:04:00,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 15:04:00,051 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-06-05 15:04:00,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:04:00,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:00,052 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:00,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-06-05 15:04:00,269 INFO L430 AbstractCegarLoop]: === Iteration 38 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:00,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:00,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1895521031, now seen corresponding path program 11 times [2021-06-05 15:04:00,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:00,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795275570] [2021-06-05 15:04:00,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:00,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:00,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:00,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795275570] [2021-06-05 15:04:00,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795275570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:00,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718439626] [2021-06-05 15:04:00,349 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:00,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:00,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:00,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:04:00,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:00,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:00,452 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:00,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:00,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:00,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:00,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:10 [2021-06-05 15:04:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:00,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718439626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:00,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:00,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:04:00,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512196408] [2021-06-05 15:04:00,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:04:00,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:00,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:04:00,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:04:00,494 INFO L87 Difference]: Start difference. First operand 306 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 15:04:00,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:00,724 INFO L93 Difference]: Finished difference Result 408 states and 1237 transitions. [2021-06-05 15:04:00,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:04:00,724 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 20 [2021-06-05 15:04:00,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:00,725 INFO L225 Difference]: With dead ends: 408 [2021-06-05 15:04:00,725 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 15:04:00,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:00,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 15:04:00,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 309. [2021-06-05 15:04:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.1201298701298703) internal successors, (961), 308 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:00,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 961 transitions. [2021-06-05 15:04:00,733 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 961 transitions. Word has length 20 [2021-06-05 15:04:00,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:00,733 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 961 transitions. [2021-06-05 15:04:00,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 15:04:00,733 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 961 transitions. [2021-06-05 15:04:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:04:00,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:00,734 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:00,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 15:04:00,954 INFO L430 AbstractCegarLoop]: === Iteration 39 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:00,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:00,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1371296405, now seen corresponding path program 12 times [2021-06-05 15:04:00,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:00,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849870322] [2021-06-05 15:04:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:01,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:01,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849870322] [2021-06-05 15:04:01,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849870322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:01,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113466849] [2021-06-05 15:04:01,019 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:01,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:04:01,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:01,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:04:01,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:01,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:01,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:04:01,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:01,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:01,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:01,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:21 [2021-06-05 15:04:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:01,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113466849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:01,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:01,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-05 15:04:01,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666341766] [2021-06-05 15:04:01,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:04:01,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:01,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:04:01,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:04:01,237 INFO L87 Difference]: Start difference. First operand 309 states and 961 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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 15:04:01,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:01,664 INFO L93 Difference]: Finished difference Result 429 states and 1298 transitions. [2021-06-05 15:04:01,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:04:01,664 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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 15:04:01,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:01,666 INFO L225 Difference]: With dead ends: 429 [2021-06-05 15:04:01,666 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 15:04:01,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=113, Invalid=393, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 15:04:01,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 312. [2021-06-05 15:04:01,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.122186495176849) internal successors, (971), 311 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 971 transitions. [2021-06-05 15:04:01,672 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 971 transitions. Word has length 20 [2021-06-05 15:04:01,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:01,673 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 971 transitions. [2021-06-05 15:04:01,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 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 15:04:01,673 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 971 transitions. [2021-06-05 15:04:01,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:04:01,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:01,674 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:01,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 15:04:01,896 INFO L430 AbstractCegarLoop]: === Iteration 40 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:01,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:01,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1694882583, now seen corresponding path program 13 times [2021-06-05 15:04:01,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:01,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516463152] [2021-06-05 15:04:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:01,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:01,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516463152] [2021-06-05 15:04:01,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516463152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:01,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990766905] [2021-06-05 15:04:01,968 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:02,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:04:02,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:02,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:02,058 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:02,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:02,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:02,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:02,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:04:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:02,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990766905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:02,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:02,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:04:02,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435490818] [2021-06-05 15:04:02,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:04:02,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:02,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:04:02,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:02,109 INFO L87 Difference]: Start difference. First operand 312 states and 971 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 15:04:02,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:02,295 INFO L93 Difference]: Finished difference Result 391 states and 1193 transitions. [2021-06-05 15:04:02,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:04:02,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) Word has length 20 [2021-06-05 15:04:02,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:02,296 INFO L225 Difference]: With dead ends: 391 [2021-06-05 15:04:02,296 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 15:04:02,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:04:02,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 15:04:02,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 306. [2021-06-05 15:04:02,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1180327868852458) internal successors, (951), 305 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:02,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-06-05 15:04:02,301 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-06-05 15:04:02,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:02,302 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-06-05 15:04:02,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 15:04:02,302 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-06-05 15:04:02,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:04:02,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:02,303 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:02,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-05 15:04:02,525 INFO L430 AbstractCegarLoop]: === Iteration 41 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:02,525 INFO L82 PathProgramCache]: Analyzing trace with hash -455362805, now seen corresponding path program 13 times [2021-06-05 15:04:02,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:02,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318749015] [2021-06-05 15:04:02,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:02,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:02,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:02,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318749015] [2021-06-05 15:04:02,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318749015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:02,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89680980] [2021-06-05 15:04:02,640 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:02,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:04:02,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:02,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:02,726 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:02,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:02,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:02,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:02,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:04:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:02,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89680980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:02,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:02,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:04:02,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088555634] [2021-06-05 15:04:02,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:04:02,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:02,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:04:02,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:04:02,785 INFO L87 Difference]: Start difference. First operand 306 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 15:04:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:03,017 INFO L93 Difference]: Finished difference Result 431 states and 1307 transitions. [2021-06-05 15:04:03,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:04:03,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 20 [2021-06-05 15:04:03,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:03,019 INFO L225 Difference]: With dead ends: 431 [2021-06-05 15:04:03,019 INFO L226 Difference]: Without dead ends: 421 [2021-06-05 15:04:03,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 223.8ms TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:03,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-05 15:04:03,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 309. [2021-06-05 15:04:03,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.1136363636363638) internal successors, (959), 308 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:03,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-06-05 15:04:03,025 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-06-05 15:04:03,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:03,025 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-06-05 15:04:03,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 15:04:03,025 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-06-05 15:04:03,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:04:03,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:03,026 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:03,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 15:04:03,237 INFO L430 AbstractCegarLoop]: === Iteration 42 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:03,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:03,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2048743317, now seen corresponding path program 14 times [2021-06-05 15:04:03,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:03,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132156322] [2021-06-05 15:04:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:03,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:03,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:03,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:03,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132156322] [2021-06-05 15:04:03,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132156322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:03,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993045172] [2021-06-05 15:04:03,354 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:03,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:03,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:03,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:04:03,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:03,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:03,452 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:03,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:03,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:03,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:03,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:04:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:03,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993045172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:03,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:03,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:04:03,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027401725] [2021-06-05 15:04:03,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:04:03,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:03,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:04:03,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:03,516 INFO L87 Difference]: Start difference. First operand 309 states and 959 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 15:04:03,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:03,805 INFO L93 Difference]: Finished difference Result 424 states and 1287 transitions. [2021-06-05 15:04:03,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:04:03,805 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) Word has length 20 [2021-06-05 15:04:03,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:03,807 INFO L225 Difference]: With dead ends: 424 [2021-06-05 15:04:03,807 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 15:04:03,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:03,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 15:04:03,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 309. [2021-06-05 15:04:03,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.1136363636363638) internal successors, (959), 308 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-06-05 15:04:03,812 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-06-05 15:04:03,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:03,812 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-06-05 15:04:03,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 15:04:03,812 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-06-05 15:04:03,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:04:03,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:03,813 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:04,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:04,030 INFO L430 AbstractCegarLoop]: === Iteration 43 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:04,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:04,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1782109633, now seen corresponding path program 14 times [2021-06-05 15:04:04,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:04,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812193568] [2021-06-05 15:04:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:04,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:04,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:04,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812193568] [2021-06-05 15:04:04,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812193568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:04,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290435866] [2021-06-05 15:04:04,106 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:04,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:04,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:04,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:04:04,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:04,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:04,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:04,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:04,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:04,219 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:04,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:04:04,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:04,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290435866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:04,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:04,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:04:04,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159012082] [2021-06-05 15:04:04,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:04:04,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:04,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:04:04,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:04,273 INFO L87 Difference]: Start difference. First operand 309 states and 959 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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 15:04:04,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:04,484 INFO L93 Difference]: Finished difference Result 398 states and 1210 transitions. [2021-06-05 15:04:04,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:04:04,484 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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 20 [2021-06-05 15:04:04,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:04,486 INFO L225 Difference]: With dead ends: 398 [2021-06-05 15:04:04,486 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 15:04:04,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:04:04,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 15:04:04,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 312. [2021-06-05 15:04:04,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.1157556270096465) internal successors, (969), 311 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:04,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 969 transitions. [2021-06-05 15:04:04,492 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 969 transitions. Word has length 20 [2021-06-05 15:04:04,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:04,492 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 969 transitions. [2021-06-05 15:04:04,492 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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 15:04:04,492 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 969 transitions. [2021-06-05 15:04:04,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:04:04,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:04,493 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:04,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:04,709 INFO L430 AbstractCegarLoop]: === Iteration 44 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:04,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:04,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2105695811, now seen corresponding path program 15 times [2021-06-05 15:04:04,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:04,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461309754] [2021-06-05 15:04:04,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:04,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:04,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461309754] [2021-06-05 15:04:04,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461309754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:04,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46612466] [2021-06-05 15:04:04,784 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:04,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:04,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:04,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:04:04,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:04,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:04,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:04:04,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:04,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:04,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:04,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:26 [2021-06-05 15:04:04,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:04,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46612466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:04,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:04,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:04:04,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472566625] [2021-06-05 15:04:04,995 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:04:04,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:04,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:04:04,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:04:04,995 INFO L87 Difference]: Start difference. First operand 312 states and 969 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 15:04:05,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:05,931 INFO L93 Difference]: Finished difference Result 464 states and 1400 transitions. [2021-06-05 15:04:05,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:04:05,944 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 15:04:05,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:05,946 INFO L225 Difference]: With dead ends: 464 [2021-06-05 15:04:05,946 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 15:04:05,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 779.9ms TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:04:05,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 15:04:05,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 309. [2021-06-05 15:04:05,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 3.1136363636363638) internal successors, (959), 308 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 959 transitions. [2021-06-05 15:04:05,953 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 959 transitions. Word has length 20 [2021-06-05 15:04:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:05,953 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 959 transitions. [2021-06-05 15:04:05,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 15:04:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 959 transitions. [2021-06-05 15:04:05,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:04:05,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:05,954 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:06,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 15:04:06,168 INFO L430 AbstractCegarLoop]: === Iteration 45 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:06,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:06,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1652348817, now seen corresponding path program 15 times [2021-06-05 15:04:06,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:06,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512234972] [2021-06-05 15:04:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:06,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:06,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512234972] [2021-06-05 15:04:06,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512234972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:06,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033755928] [2021-06-05 15:04:06,247 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:06,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:06,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:06,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:04:06,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:06,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:06,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:04:06,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:06,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:06,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:06,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:23 [2021-06-05 15:04:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:06,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033755928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:06,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:06,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 15:04:06,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561626187] [2021-06-05 15:04:06,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:04:06,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:06,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:04:06,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:04:06,491 INFO L87 Difference]: Start difference. First operand 309 states and 959 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 15:04:07,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:07,628 INFO L93 Difference]: Finished difference Result 598 states and 1728 transitions. [2021-06-05 15:04:07,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:04:07,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 15:04:07,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:07,630 INFO L225 Difference]: With dead ends: 598 [2021-06-05 15:04:07,630 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 15:04:07,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 885.5ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:04:07,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 15:04:07,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 313. [2021-06-05 15:04:07,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 3.1121794871794872) internal successors, (971), 312 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:07,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 971 transitions. [2021-06-05 15:04:07,637 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 971 transitions. Word has length 20 [2021-06-05 15:04:07,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:07,637 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 971 transitions. [2021-06-05 15:04:07,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 15:04:07,637 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 971 transitions. [2021-06-05 15:04:07,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:04:07,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:07,638 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:07,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:07,853 INFO L430 AbstractCegarLoop]: === Iteration 46 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:07,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:07,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1857266951, now seen corresponding path program 16 times [2021-06-05 15:04:07,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:07,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247216396] [2021-06-05 15:04:07,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:07,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:07,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:07,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247216396] [2021-06-05 15:04:07,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247216396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:07,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222709655] [2021-06-05 15:04:07,932 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:07,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:07,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:07,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:04:07,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:08,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:08,046 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:04:08,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:08,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:08,056 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:08,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:04:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:08,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222709655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:08,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:08,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:04:08,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422752815] [2021-06-05 15:04:08,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:04:08,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:08,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:04:08,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:08,099 INFO L87 Difference]: Start difference. First operand 313 states and 971 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 15:04:08,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:08,350 INFO L93 Difference]: Finished difference Result 403 states and 1227 transitions. [2021-06-05 15:04:08,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:04:08,350 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) Word has length 20 [2021-06-05 15:04:08,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:08,352 INFO L225 Difference]: With dead ends: 403 [2021-06-05 15:04:08,352 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 15:04:08,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:04:08,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 15:04:08,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 306. [2021-06-05 15:04:08,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1180327868852458) internal successors, (951), 305 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 951 transitions. [2021-06-05 15:04:08,357 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 951 transitions. Word has length 20 [2021-06-05 15:04:08,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:08,357 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 951 transitions. [2021-06-05 15:04:08,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 15:04:08,357 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 951 transitions. [2021-06-05 15:04:08,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:04:08,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:08,358 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:08,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:08,565 INFO L430 AbstractCegarLoop]: === Iteration 47 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:08,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:08,565 INFO L82 PathProgramCache]: Analyzing trace with hash -76255857, now seen corresponding path program 16 times [2021-06-05 15:04:08,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:08,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180432326] [2021-06-05 15:04:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:08,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:08,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:08,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180432326] [2021-06-05 15:04:08,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180432326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:08,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107500559] [2021-06-05 15:04:08,671 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:08,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:08,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:08,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:04:08,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:08,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:08,753 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:08,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:08,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:08,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:08,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:04:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:08,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107500559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:08,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:08,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:04:08,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319604443] [2021-06-05 15:04:08,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:04:08,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:08,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:04:08,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:04:08,815 INFO L87 Difference]: Start difference. First operand 306 states and 951 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 15:04:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:09,062 INFO L93 Difference]: Finished difference Result 448 states and 1357 transitions. [2021-06-05 15:04:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:04:09,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 20 [2021-06-05 15:04:09,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:09,064 INFO L225 Difference]: With dead ends: 448 [2021-06-05 15:04:09,064 INFO L226 Difference]: Without dead ends: 438 [2021-06-05 15:04:09,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 270.1ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:09,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-06-05 15:04:09,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 312. [2021-06-05 15:04:09,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.112540192926045) internal successors, (968), 311 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:09,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-06-05 15:04:09,070 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-06-05 15:04:09,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:09,070 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-06-05 15:04:09,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 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 15:04:09,070 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-06-05 15:04:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:04:09,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:09,071 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:09,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:09,294 INFO L430 AbstractCegarLoop]: === Iteration 48 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:09,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:09,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1438435337, now seen corresponding path program 17 times [2021-06-05 15:04:09,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:09,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884757415] [2021-06-05 15:04:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:09,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:09,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884757415] [2021-06-05 15:04:09,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884757415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:09,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358633961] [2021-06-05 15:04:09,423 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:09,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:09,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:09,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:04:09,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:09,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:09,532 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:09,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:09,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:09,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:09,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:04:09,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:09,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358633961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:09,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:09,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:04:09,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278444188] [2021-06-05 15:04:09,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:04:09,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:09,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:04:09,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:04:09,597 INFO L87 Difference]: Start difference. First operand 312 states and 968 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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 15:04:10,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:10,073 INFO L93 Difference]: Finished difference Result 497 states and 1504 transitions. [2021-06-05 15:04:10,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:04:10,073 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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) Word has length 20 [2021-06-05 15:04:10,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:10,075 INFO L225 Difference]: With dead ends: 497 [2021-06-05 15:04:10,075 INFO L226 Difference]: Without dead ends: 485 [2021-06-05 15:04:10,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 355.0ms TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:04:10,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-06-05 15:04:10,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 312. [2021-06-05 15:04:10,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.112540192926045) internal successors, (968), 311 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:10,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-06-05 15:04:10,082 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-06-05 15:04:10,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:10,082 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-06-05 15:04:10,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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 15:04:10,082 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-06-05 15:04:10,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:04:10,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:10,083 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:10,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:10,306 INFO L430 AbstractCegarLoop]: === Iteration 49 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:10,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:10,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1865369703, now seen corresponding path program 17 times [2021-06-05 15:04:10,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:10,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043691861] [2021-06-05 15:04:10,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:10,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:10,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043691861] [2021-06-05 15:04:10,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043691861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:10,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969482728] [2021-06-05 15:04:10,387 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 15:04:10,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:10,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:10,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:04:10,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:10,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:10,488 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:10,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:10,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:10,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:10,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:04:10,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:10,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969482728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:10,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:10,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:04:10,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661210924] [2021-06-05 15:04:10,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:04:10,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:10,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:04:10,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:10,553 INFO L87 Difference]: Start difference. First operand 312 states and 968 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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 15:04:10,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:10,806 INFO L93 Difference]: Finished difference Result 435 states and 1319 transitions. [2021-06-05 15:04:10,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:04:10,806 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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 20 [2021-06-05 15:04:10,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:10,808 INFO L225 Difference]: With dead ends: 435 [2021-06-05 15:04:10,808 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 15:04:10,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 213.9ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:10,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 15:04:10,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 315. [2021-06-05 15:04:10,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1146496815286624) internal successors, (978), 314 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:10,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 978 transitions. [2021-06-05 15:04:10,814 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 978 transitions. Word has length 20 [2021-06-05 15:04:10,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:10,814 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 978 transitions. [2021-06-05 15:04:10,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 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 15:04:10,814 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 978 transitions. [2021-06-05 15:04:10,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:04:10,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:10,815 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:11,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 15:04:11,017 INFO L430 AbstractCegarLoop]: === Iteration 50 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:11,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:11,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1541783525, now seen corresponding path program 18 times [2021-06-05 15:04:11,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:11,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243679498] [2021-06-05 15:04:11,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:11,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:11,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243679498] [2021-06-05 15:04:11,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243679498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:11,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569809876] [2021-06-05 15:04:11,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:11,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:04:11,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:11,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:04:11,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:11,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:11,170 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:04:11,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:11,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:11,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:11,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:13 [2021-06-05 15:04:11,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:11,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569809876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:11,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:11,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:04:11,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111583320] [2021-06-05 15:04:11,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:04:11,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:11,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:04:11,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:11,230 INFO L87 Difference]: Start difference. First operand 315 states and 978 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 15:04:11,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:11,432 INFO L93 Difference]: Finished difference Result 432 states and 1315 transitions. [2021-06-05 15:04:11,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:04:11,432 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) Word has length 20 [2021-06-05 15:04:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:11,433 INFO L225 Difference]: With dead ends: 432 [2021-06-05 15:04:11,433 INFO L226 Difference]: Without dead ends: 421 [2021-06-05 15:04:11,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:11,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2021-06-05 15:04:11,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 312. [2021-06-05 15:04:11,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 3.112540192926045) internal successors, (968), 311 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:11,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 968 transitions. [2021-06-05 15:04:11,440 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 968 transitions. Word has length 20 [2021-06-05 15:04:11,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:11,440 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 968 transitions. [2021-06-05 15:04:11,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 15:04:11,440 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 968 transitions. [2021-06-05 15:04:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:04:11,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:11,441 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:11,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:11,657 INFO L430 AbstractCegarLoop]: === Iteration 51 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:11,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:11,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1004860857, now seen corresponding path program 18 times [2021-06-05 15:04:11,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:11,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238085465] [2021-06-05 15:04:11,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:11,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:11,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238085465] [2021-06-05 15:04:11,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238085465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:11,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052413358] [2021-06-05 15:04:11,751 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:11,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:04:11,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:11,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 15:04:11,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:11,847 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:11,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:04:11,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:11,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:11,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:11,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:29 [2021-06-05 15:04:11,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:11,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052413358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:11,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:11,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-05 15:04:11,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782267553] [2021-06-05 15:04:11,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:04:11,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:11,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:04:11,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:04:11,922 INFO L87 Difference]: Start difference. First operand 312 states and 968 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 15:04:12,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:12,914 INFO L93 Difference]: Finished difference Result 644 states and 1918 transitions. [2021-06-05 15:04:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:04:12,914 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 15:04:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:12,916 INFO L225 Difference]: With dead ends: 644 [2021-06-05 15:04:12,916 INFO L226 Difference]: Without dead ends: 622 [2021-06-05 15:04:12,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 693.5ms TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:04:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-06-05 15:04:12,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 316. [2021-06-05 15:04:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 3.111111111111111) internal successors, (980), 315 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:12,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 980 transitions. [2021-06-05 15:04:12,924 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 980 transitions. Word has length 20 [2021-06-05 15:04:12,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:12,924 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 980 transitions. [2021-06-05 15:04:12,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 15:04:12,924 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 980 transitions. [2021-06-05 15:04:12,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:04:12,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:12,925 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:13,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:13,129 INFO L430 AbstractCegarLoop]: === Iteration 52 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:13,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:13,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1209778991, now seen corresponding path program 19 times [2021-06-05 15:04:13,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:13,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969054079] [2021-06-05 15:04:13,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:13,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:13,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969054079] [2021-06-05 15:04:13,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969054079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:13,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605959095] [2021-06-05 15:04:13,218 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:13,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:04:13,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:13,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:13,350 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:04:13,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:13,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:13,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:13,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:04:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:13,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605959095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:13,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:13,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 15:04:13,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134728288] [2021-06-05 15:04:13,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:04:13,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:13,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:04:13,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:13,395 INFO L87 Difference]: Start difference. First operand 316 states and 980 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 15:04:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:13,637 INFO L93 Difference]: Finished difference Result 437 states and 1326 transitions. [2021-06-05 15:04:13,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:04:13,637 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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) Word has length 20 [2021-06-05 15:04:13,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:13,638 INFO L225 Difference]: With dead ends: 437 [2021-06-05 15:04:13,638 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 15:04:13,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 15:04:13,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 315. [2021-06-05 15:04:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1178343949044587) internal successors, (979), 314 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:13,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 979 transitions. [2021-06-05 15:04:13,644 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 979 transitions. Word has length 20 [2021-06-05 15:04:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:13,645 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 979 transitions. [2021-06-05 15:04:13,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 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 15:04:13,645 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 979 transitions. [2021-06-05 15:04:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:04:13,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:13,645 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:13,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:13,849 INFO L430 AbstractCegarLoop]: === Iteration 53 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:13,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:13,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1625404767, now seen corresponding path program 19 times [2021-06-05 15:04:13,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:13,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936507421] [2021-06-05 15:04:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:13,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:13,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:13,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936507421] [2021-06-05 15:04:13,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936507421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:13,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009361092] [2021-06-05 15:04:13,947 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:13,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:04:13,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:14,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:14,073 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-06-05 15:04:14,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:14,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:14,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:14,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-06-05 15:04:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:14,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009361092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:14,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:14,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-06-05 15:04:14,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822721647] [2021-06-05 15:04:14,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:04:14,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:14,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:04:14,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:04:14,126 INFO L87 Difference]: Start difference. First operand 315 states and 979 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:14,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:14,680 INFO L93 Difference]: Finished difference Result 577 states and 1769 transitions. [2021-06-05 15:04:14,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:04:14,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 20 [2021-06-05 15:04:14,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:14,682 INFO L225 Difference]: With dead ends: 577 [2021-06-05 15:04:14,682 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 15:04:14,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:14,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 15:04:14,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 323. [2021-06-05 15:04:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 3.1180124223602483) internal successors, (1004), 322 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:14,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 1004 transitions. [2021-06-05 15:04:14,687 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 1004 transitions. Word has length 20 [2021-06-05 15:04:14,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:14,688 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 1004 transitions. [2021-06-05 15:04:14,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:14,688 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 1004 transitions. [2021-06-05 15:04:14,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:04:14,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:14,689 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:14,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 15:04:14,893 INFO L430 AbstractCegarLoop]: === Iteration 54 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:14,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:14,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1821665449, now seen corresponding path program 20 times [2021-06-05 15:04:14,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:14,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550870499] [2021-06-05 15:04:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:14,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:14,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:14,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:14,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550870499] [2021-06-05 15:04:14,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550870499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:14,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386697620] [2021-06-05 15:04:14,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:14,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:14,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:14,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-05 15:04:14,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:15,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:15,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-06-05 15:04:15,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:15,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:15,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:15,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:22 [2021-06-05 15:04:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:15,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386697620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:15,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:15,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-05 15:04:15,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444456225] [2021-06-05 15:04:15,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:04:15,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:15,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:04:15,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:04:15,167 INFO L87 Difference]: Start difference. First operand 323 states and 1004 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 15:04:15,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:15,575 INFO L93 Difference]: Finished difference Result 516 states and 1586 transitions. [2021-06-05 15:04:15,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:04:15,575 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 15:04:15,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:15,576 INFO L225 Difference]: With dead ends: 516 [2021-06-05 15:04:15,576 INFO L226 Difference]: Without dead ends: 505 [2021-06-05 15:04:15,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 305.8ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-06-05 15:04:15,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 322. [2021-06-05 15:04:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.1246105919003115) internal successors, (1003), 321 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1003 transitions. [2021-06-05 15:04:15,581 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1003 transitions. Word has length 20 [2021-06-05 15:04:15,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:15,581 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 1003 transitions. [2021-06-05 15:04:15,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 13 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 15:04:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1003 transitions. [2021-06-05 15:04:15,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:15,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:15,581 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:15,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:15,790 INFO L430 AbstractCegarLoop]: === Iteration 55 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:15,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:15,790 INFO L82 PathProgramCache]: Analyzing trace with hash -827696633, now seen corresponding path program 20 times [2021-06-05 15:04:15,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:15,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611607171] [2021-06-05 15:04:15,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:15,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:15,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:15,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611607171] [2021-06-05 15:04:15,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611607171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:15,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457118953] [2021-06-05 15:04:15,824 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:15,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:15,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:15,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:15,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:15,902 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:15,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457118953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:15,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:15,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 15:04:15,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709719847] [2021-06-05 15:04:15,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:04:15,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:15,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:04:15,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:04:15,903 INFO L87 Difference]: Start difference. First operand 322 states and 1003 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 15:04:15,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:15,969 INFO L93 Difference]: Finished difference Result 489 states and 1527 transitions. [2021-06-05 15:04:15,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:04:15,969 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 22 [2021-06-05 15:04:15,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:15,970 INFO L225 Difference]: With dead ends: 489 [2021-06-05 15:04:15,970 INFO L226 Difference]: Without dead ends: 489 [2021-06-05 15:04:15,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:15,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-06-05 15:04:15,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 311. [2021-06-05 15:04:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.203225806451613) internal successors, (993), 310 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:15,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 993 transitions. [2021-06-05 15:04:15,976 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 993 transitions. Word has length 22 [2021-06-05 15:04:15,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:15,976 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 993 transitions. [2021-06-05 15:04:15,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 15:04:15,976 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 993 transitions. [2021-06-05 15:04:15,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:15,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:15,977 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:16,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:16,199 INFO L430 AbstractCegarLoop]: === Iteration 56 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:16,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:16,200 INFO L82 PathProgramCache]: Analyzing trace with hash 196643718, now seen corresponding path program 21 times [2021-06-05 15:04:16,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:16,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780392887] [2021-06-05 15:04:16,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:16,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:16,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780392887] [2021-06-05 15:04:16,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780392887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:16,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175479684] [2021-06-05 15:04:16,225 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:16,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:16,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:16,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:16,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:16,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175479684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:16,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:16,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 15:04:16,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459359274] [2021-06-05 15:04:16,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:04:16,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:16,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:04:16,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:04:16,293 INFO L87 Difference]: Start difference. First operand 311 states and 993 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 15:04:16,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:16,375 INFO L93 Difference]: Finished difference Result 498 states and 1529 transitions. [2021-06-05 15:04:16,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:04:16,375 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 22 [2021-06-05 15:04:16,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:16,376 INFO L225 Difference]: With dead ends: 498 [2021-06-05 15:04:16,376 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 15:04:16,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:04:16,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 15:04:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 311. [2021-06-05 15:04:16,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 3.170967741935484) internal successors, (983), 310 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 983 transitions. [2021-06-05 15:04:16,386 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 983 transitions. Word has length 22 [2021-06-05 15:04:16,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:16,386 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 983 transitions. [2021-06-05 15:04:16,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 15:04:16,386 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 983 transitions. [2021-06-05 15:04:16,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:16,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:16,386 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:16,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-06-05 15:04:16,587 INFO L430 AbstractCegarLoop]: === Iteration 57 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:16,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:16,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1724048449, now seen corresponding path program 22 times [2021-06-05 15:04:16,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:16,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976759381] [2021-06-05 15:04:16,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:16,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:16,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976759381] [2021-06-05 15:04:16,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976759381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:16,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868741196] [2021-06-05 15:04:16,615 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:16,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:16,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:16,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:16,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:16,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868741196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:16,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:16,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:04:16,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703822146] [2021-06-05 15:04:16,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:16,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:16,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:16,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:16,705 INFO L87 Difference]: Start difference. First operand 311 states and 983 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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 15:04:16,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:16,820 INFO L93 Difference]: Finished difference Result 640 states and 1919 transitions. [2021-06-05 15:04:16,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:04:16,820 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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 22 [2021-06-05 15:04:16,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:16,822 INFO L225 Difference]: With dead ends: 640 [2021-06-05 15:04:16,822 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 15:04:16,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:16,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 15:04:16,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 368. [2021-06-05 15:04:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 3.231607629427793) internal successors, (1186), 367 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:16,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1186 transitions. [2021-06-05 15:04:16,827 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1186 transitions. Word has length 22 [2021-06-05 15:04:16,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:16,827 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 1186 transitions. [2021-06-05 15:04:16,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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 15:04:16,828 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1186 transitions. [2021-06-05 15:04:16,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:16,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:16,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:17,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:17,033 INFO L430 AbstractCegarLoop]: === Iteration 58 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:17,033 INFO L82 PathProgramCache]: Analyzing trace with hash 40343294, now seen corresponding path program 23 times [2021-06-05 15:04:17,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:17,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993284157] [2021-06-05 15:04:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:17,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:17,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993284157] [2021-06-05 15:04:17,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993284157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:17,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207775511] [2021-06-05 15:04:17,066 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:17,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:17,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:17,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:17,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:17,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207775511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:17,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:17,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:04:17,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451276141] [2021-06-05 15:04:17,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:17,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:17,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:17,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:17,149 INFO L87 Difference]: Start difference. First operand 368 states and 1186 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:17,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:17,317 INFO L93 Difference]: Finished difference Result 772 states and 2287 transitions. [2021-06-05 15:04:17,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:04:17,318 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 22 [2021-06-05 15:04:17,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:17,319 INFO L225 Difference]: With dead ends: 772 [2021-06-05 15:04:17,319 INFO L226 Difference]: Without dead ends: 728 [2021-06-05 15:04:17,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 113.0ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:17,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-06-05 15:04:17,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 506. [2021-06-05 15:04:17,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 3.235643564356436) internal successors, (1634), 505 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1634 transitions. [2021-06-05 15:04:17,327 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1634 transitions. Word has length 22 [2021-06-05 15:04:17,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:17,327 INFO L482 AbstractCegarLoop]: Abstraction has 506 states and 1634 transitions. [2021-06-05 15:04:17,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:17,327 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1634 transitions. [2021-06-05 15:04:17,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:17,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:17,328 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:17,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-06-05 15:04:17,528 INFO L430 AbstractCegarLoop]: === Iteration 59 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:17,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:17,529 INFO L82 PathProgramCache]: Analyzing trace with hash 358278619, now seen corresponding path program 24 times [2021-06-05 15:04:17,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:17,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575346336] [2021-06-05 15:04:17,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:17,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:17,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575346336] [2021-06-05 15:04:17,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575346336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:17,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715855385] [2021-06-05 15:04:17,550 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:17,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:04:17,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:17,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:17,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:17,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715855385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:17,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:17,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:04:17,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675597670] [2021-06-05 15:04:17,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:17,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:17,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:17,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:17,631 INFO L87 Difference]: Start difference. First operand 506 states and 1634 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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 15:04:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:17,759 INFO L93 Difference]: Finished difference Result 972 states and 2907 transitions. [2021-06-05 15:04:17,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:04:17,760 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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 22 [2021-06-05 15:04:17,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:17,761 INFO L225 Difference]: With dead ends: 972 [2021-06-05 15:04:17,761 INFO L226 Difference]: Without dead ends: 972 [2021-06-05 15:04:17,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:17,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2021-06-05 15:04:17,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 557. [2021-06-05 15:04:17,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 556 states have (on average 3.318345323741007) internal successors, (1845), 556 states have internal predecessors, (1845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:17,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 1845 transitions. [2021-06-05 15:04:17,769 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 1845 transitions. Word has length 22 [2021-06-05 15:04:17,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:17,769 INFO L482 AbstractCegarLoop]: Abstraction has 557 states and 1845 transitions. [2021-06-05 15:04:17,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 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 15:04:17,770 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 1845 transitions. [2021-06-05 15:04:17,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:17,770 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:17,770 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:17,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:17,971 INFO L430 AbstractCegarLoop]: === Iteration 60 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:17,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:17,971 INFO L82 PathProgramCache]: Analyzing trace with hash -527046306, now seen corresponding path program 25 times [2021-06-05 15:04:17,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:17,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889504003] [2021-06-05 15:04:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:17,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:17,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:17,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889504003] [2021-06-05 15:04:17,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889504003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:17,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141960954] [2021-06-05 15:04:17,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:18,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:18,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:18,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141960954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:18,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:18,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:04:18,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361300778] [2021-06-05 15:04:18,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:18,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:18,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:18,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:18,099 INFO L87 Difference]: Start difference. First operand 557 states and 1845 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:18,265 INFO L93 Difference]: Finished difference Result 964 states and 2972 transitions. [2021-06-05 15:04:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:04:18,265 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 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 22 [2021-06-05 15:04:18,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:18,267 INFO L225 Difference]: With dead ends: 964 [2021-06-05 15:04:18,267 INFO L226 Difference]: Without dead ends: 916 [2021-06-05 15:04:18,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:18,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-06-05 15:04:18,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 606. [2021-06-05 15:04:18,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.3338842975206613) internal successors, (2017), 605 states have internal predecessors, (2017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:18,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2017 transitions. [2021-06-05 15:04:18,276 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2017 transitions. Word has length 22 [2021-06-05 15:04:18,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:18,276 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 2017 transitions. [2021-06-05 15:04:18,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:18,276 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2017 transitions. [2021-06-05 15:04:18,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:18,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:18,277 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:18,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 15:04:18,478 INFO L430 AbstractCegarLoop]: === Iteration 61 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:18,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:18,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1135425701, now seen corresponding path program 26 times [2021-06-05 15:04:18,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:18,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280566724] [2021-06-05 15:04:18,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:18,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:18,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280566724] [2021-06-05 15:04:18,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280566724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:18,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780042478] [2021-06-05 15:04:18,502 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:18,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:18,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:18,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:18,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:18,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780042478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:18,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:18,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:04:18,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044556165] [2021-06-05 15:04:18,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:18,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:18,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:18,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:18,606 INFO L87 Difference]: Start difference. First operand 606 states and 2017 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 15:04:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:18,794 INFO L93 Difference]: Finished difference Result 881 states and 2727 transitions. [2021-06-05 15:04:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:04:18,795 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 22 [2021-06-05 15:04:18,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:18,797 INFO L225 Difference]: With dead ends: 881 [2021-06-05 15:04:18,798 INFO L226 Difference]: Without dead ends: 871 [2021-06-05 15:04:18,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:04:18,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2021-06-05 15:04:18,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 612. [2021-06-05 15:04:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 3.3060556464811786) internal successors, (2020), 611 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 2020 transitions. [2021-06-05 15:04:18,819 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 2020 transitions. Word has length 22 [2021-06-05 15:04:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:18,819 INFO L482 AbstractCegarLoop]: Abstraction has 612 states and 2020 transitions. [2021-06-05 15:04:18,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 15:04:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 2020 transitions. [2021-06-05 15:04:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:18,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:18,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:19,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 15:04:19,041 INFO L430 AbstractCegarLoop]: === Iteration 62 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:19,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:19,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1507852130, now seen corresponding path program 27 times [2021-06-05 15:04:19,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:19,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966271004] [2021-06-05 15:04:19,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:19,075 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:19,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:19,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966271004] [2021-06-05 15:04:19,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966271004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:19,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824327308] [2021-06-05 15:04:19,076 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:19,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:19,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:19,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:19,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:19,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824327308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:19,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:19,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:04:19,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519589025] [2021-06-05 15:04:19,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:19,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:19,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:19,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:19,154 INFO L87 Difference]: Start difference. First operand 612 states and 2020 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 15:04:19,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:19,280 INFO L93 Difference]: Finished difference Result 917 states and 2822 transitions. [2021-06-05 15:04:19,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:04:19,280 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 22 [2021-06-05 15:04:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:19,282 INFO L225 Difference]: With dead ends: 917 [2021-06-05 15:04:19,282 INFO L226 Difference]: Without dead ends: 893 [2021-06-05 15:04:19,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:04:19,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-06-05 15:04:19,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 606. [2021-06-05 15:04:19,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.3239669421487603) internal successors, (2011), 605 states have internal predecessors, (2011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 2011 transitions. [2021-06-05 15:04:19,291 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 2011 transitions. Word has length 22 [2021-06-05 15:04:19,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:19,291 INFO L482 AbstractCegarLoop]: Abstraction has 606 states and 2011 transitions. [2021-06-05 15:04:19,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 15:04:19,291 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 2011 transitions. [2021-06-05 15:04:19,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:19,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:19,293 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:19,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:19,516 INFO L430 AbstractCegarLoop]: === Iteration 63 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:19,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:19,516 INFO L82 PathProgramCache]: Analyzing trace with hash 326583295, now seen corresponding path program 28 times [2021-06-05 15:04:19,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:19,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216261579] [2021-06-05 15:04:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:19,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:19,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216261579] [2021-06-05 15:04:19,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216261579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:19,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823688718] [2021-06-05 15:04:19,542 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:19,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:19,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:19,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:19,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:19,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823688718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:19,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:19,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 15:04:19,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567448554] [2021-06-05 15:04:19,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:04:19,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:19,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:04:19,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:04:19,643 INFO L87 Difference]: Start difference. First operand 606 states and 2011 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:19,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:19,813 INFO L93 Difference]: Finished difference Result 1221 states and 3751 transitions. [2021-06-05 15:04:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:04:19,814 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 22 [2021-06-05 15:04:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:19,816 INFO L225 Difference]: With dead ends: 1221 [2021-06-05 15:04:19,816 INFO L226 Difference]: Without dead ends: 1221 [2021-06-05 15:04:19,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:19,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-06-05 15:04:19,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 650. [2021-06-05 15:04:19,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 3.362095531587057) internal successors, (2182), 649 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:19,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2182 transitions. [2021-06-05 15:04:19,830 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2182 transitions. Word has length 22 [2021-06-05 15:04:19,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:19,830 INFO L482 AbstractCegarLoop]: Abstraction has 650 states and 2182 transitions. [2021-06-05 15:04:19,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:19,830 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2182 transitions. [2021-06-05 15:04:19,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:19,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:19,832 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:20,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:20,053 INFO L430 AbstractCegarLoop]: === Iteration 64 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:20,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:20,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1657114921, now seen corresponding path program 29 times [2021-06-05 15:04:20,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:20,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283719742] [2021-06-05 15:04:20,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:20,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:20,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:20,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283719742] [2021-06-05 15:04:20,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283719742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:20,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934605364] [2021-06-05 15:04:20,080 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:20,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:04:20,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:20,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:20,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:20,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934605364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:20,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:20,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 15:04:20,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299769441] [2021-06-05 15:04:20,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:20,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:20,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:20,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:20,189 INFO L87 Difference]: Start difference. First operand 650 states and 2182 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:20,312 INFO L93 Difference]: Finished difference Result 1386 states and 4279 transitions. [2021-06-05 15:04:20,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:04:20,312 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 22 [2021-06-05 15:04:20,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:20,314 INFO L225 Difference]: With dead ends: 1386 [2021-06-05 15:04:20,314 INFO L226 Difference]: Without dead ends: 1386 [2021-06-05 15:04:20,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:20,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-06-05 15:04:20,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 762. [2021-06-05 15:04:20,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.4480946123521683) internal successors, (2624), 761 states have internal predecessors, (2624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:20,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2624 transitions. [2021-06-05 15:04:20,334 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2624 transitions. Word has length 22 [2021-06-05 15:04:20,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:20,334 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2624 transitions. [2021-06-05 15:04:20,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:20,334 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2624 transitions. [2021-06-05 15:04:20,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:20,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:20,335 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:20,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:20,549 INFO L430 AbstractCegarLoop]: === Iteration 65 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:20,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1144148055, now seen corresponding path program 30 times [2021-06-05 15:04:20,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:20,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015064701] [2021-06-05 15:04:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:20,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:04:20,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:20,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015064701] [2021-06-05 15:04:20,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015064701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:20,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363004791] [2021-06-05 15:04:20,569 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:20,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:04:20,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:20,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:20,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:20,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363004791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:20,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:20,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 15:04:20,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524942293] [2021-06-05 15:04:20,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:20,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:20,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:20,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:20,695 INFO L87 Difference]: Start difference. First operand 762 states and 2624 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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 15:04:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:20,869 INFO L93 Difference]: Finished difference Result 1253 states and 3889 transitions. [2021-06-05 15:04:20,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:04:20,869 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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) Word has length 22 [2021-06-05 15:04:20,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:20,872 INFO L225 Difference]: With dead ends: 1253 [2021-06-05 15:04:20,872 INFO L226 Difference]: Without dead ends: 1244 [2021-06-05 15:04:20,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:20,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1244 states. [2021-06-05 15:04:20,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1244 to 762. [2021-06-05 15:04:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 3.4191852825229962) internal successors, (2602), 761 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:20,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 2602 transitions. [2021-06-05 15:04:20,888 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 2602 transitions. Word has length 22 [2021-06-05 15:04:20,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:20,889 INFO L482 AbstractCegarLoop]: Abstraction has 762 states and 2602 transitions. [2021-06-05 15:04:20,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 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 15:04:20,889 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 2602 transitions. [2021-06-05 15:04:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:20,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:20,890 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:21,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:21,105 INFO L430 AbstractCegarLoop]: === Iteration 66 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:21,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:21,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1294632791, now seen corresponding path program 31 times [2021-06-05 15:04:21,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:21,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043277264] [2021-06-05 15:04:21,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:21,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:21,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043277264] [2021-06-05 15:04:21,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043277264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:21,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574029183] [2021-06-05 15:04:21,131 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:21,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:21,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:21,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:21,240 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:21,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574029183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:21,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:21,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 15:04:21,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937569065] [2021-06-05 15:04:21,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:04:21,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:21,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:04:21,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:04:21,242 INFO L87 Difference]: Start difference. First operand 762 states and 2602 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 15:04:21,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:21,437 INFO L93 Difference]: Finished difference Result 1263 states and 4021 transitions. [2021-06-05 15:04:21,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:04:21,437 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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) Word has length 22 [2021-06-05 15:04:21,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:21,441 INFO L225 Difference]: With dead ends: 1263 [2021-06-05 15:04:21,441 INFO L226 Difference]: Without dead ends: 1251 [2021-06-05 15:04:21,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:21,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-06-05 15:04:21,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 847. [2021-06-05 15:04:21,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 847 states, 846 states have (on average 3.4539007092198584) internal successors, (2922), 846 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:21,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 2922 transitions. [2021-06-05 15:04:21,458 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 2922 transitions. Word has length 22 [2021-06-05 15:04:21,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:21,458 INFO L482 AbstractCegarLoop]: Abstraction has 847 states and 2922 transitions. [2021-06-05 15:04:21,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 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 15:04:21,458 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 2922 transitions. [2021-06-05 15:04:21,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:21,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:21,460 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:21,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:21,681 INFO L430 AbstractCegarLoop]: === Iteration 67 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:21,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:21,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1456964799, now seen corresponding path program 32 times [2021-06-05 15:04:21,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:21,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926163599] [2021-06-05 15:04:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:21,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:21,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:21,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926163599] [2021-06-05 15:04:21,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926163599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:21,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720302194] [2021-06-05 15:04:21,709 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:21,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:21,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:21,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:21,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:21,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720302194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:21,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:21,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 15:04:21,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538820341] [2021-06-05 15:04:21,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:04:21,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:21,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:04:21,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:04:21,811 INFO L87 Difference]: Start difference. First operand 847 states and 2922 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:21,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:21,960 INFO L93 Difference]: Finished difference Result 1246 states and 3991 transitions. [2021-06-05 15:04:21,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:04:21,961 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 15:04:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:21,963 INFO L225 Difference]: With dead ends: 1246 [2021-06-05 15:04:21,963 INFO L226 Difference]: Without dead ends: 1246 [2021-06-05 15:04:21,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 95.3ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:21,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-06-05 15:04:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 888. [2021-06-05 15:04:21,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.47576099210823) internal successors, (3083), 887 states have internal predecessors, (3083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 3083 transitions. [2021-06-05 15:04:21,982 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 3083 transitions. Word has length 22 [2021-06-05 15:04:21,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:21,982 INFO L482 AbstractCegarLoop]: Abstraction has 888 states and 3083 transitions. [2021-06-05 15:04:21,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:21,982 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 3083 transitions. [2021-06-05 15:04:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:21,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:21,984 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:22,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:22,189 INFO L430 AbstractCegarLoop]: === Iteration 68 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:22,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:22,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1570199292, now seen corresponding path program 33 times [2021-06-05 15:04:22,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:22,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649924638] [2021-06-05 15:04:22,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:22,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:22,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649924638] [2021-06-05 15:04:22,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649924638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:22,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299182184] [2021-06-05 15:04:22,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:22,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:22,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:22,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:22,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:22,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299182184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:22,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:22,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 15:04:22,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441788126] [2021-06-05 15:04:22,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:04:22,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:22,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:04:22,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:04:22,313 INFO L87 Difference]: Start difference. First operand 888 states and 3083 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:22,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:22,530 INFO L93 Difference]: Finished difference Result 1362 states and 4328 transitions. [2021-06-05 15:04:22,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:04:22,530 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 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 22 [2021-06-05 15:04:22,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:22,533 INFO L225 Difference]: With dead ends: 1362 [2021-06-05 15:04:22,533 INFO L226 Difference]: Without dead ends: 1275 [2021-06-05 15:04:22,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 159.4ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:04:22,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2021-06-05 15:04:22,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 976. [2021-06-05 15:04:22,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 975 states have (on average 3.4574358974358974) internal successors, (3371), 975 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:22,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 3371 transitions. [2021-06-05 15:04:22,554 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 3371 transitions. Word has length 22 [2021-06-05 15:04:22,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:22,555 INFO L482 AbstractCegarLoop]: Abstraction has 976 states and 3371 transitions. [2021-06-05 15:04:22,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:22,555 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 3371 transitions. [2021-06-05 15:04:22,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:22,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:22,557 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:22,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:22,779 INFO L430 AbstractCegarLoop]: === Iteration 69 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:22,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:22,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1138465271, now seen corresponding path program 34 times [2021-06-05 15:04:22,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:22,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803999952] [2021-06-05 15:04:22,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:22,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:22,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:22,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:22,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803999952] [2021-06-05 15:04:22,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803999952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:22,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42739439] [2021-06-05 15:04:22,800 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:22,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:22,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:22,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:22,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:22,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42739439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:22,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:22,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 15:04:22,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805954824] [2021-06-05 15:04:22,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:22,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:22,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:22,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:22,901 INFO L87 Difference]: Start difference. First operand 976 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:23,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:23,071 INFO L93 Difference]: Finished difference Result 1340 states and 4319 transitions. [2021-06-05 15:04:23,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:04:23,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 15:04:23,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:23,074 INFO L225 Difference]: With dead ends: 1340 [2021-06-05 15:04:23,074 INFO L226 Difference]: Without dead ends: 1331 [2021-06-05 15:04:23,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:04:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-06-05 15:04:23,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 928. [2021-06-05 15:04:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.4217907227615965) internal successors, (3172), 927 states have internal predecessors, (3172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3172 transitions. [2021-06-05 15:04:23,091 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3172 transitions. Word has length 22 [2021-06-05 15:04:23,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:23,092 INFO L482 AbstractCegarLoop]: Abstraction has 928 states and 3172 transitions. [2021-06-05 15:04:23,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:23,092 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3172 transitions. [2021-06-05 15:04:23,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:23,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:23,094 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:23,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:23,309 INFO L430 AbstractCegarLoop]: === Iteration 70 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:23,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:23,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1510891700, now seen corresponding path program 35 times [2021-06-05 15:04:23,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:23,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735399251] [2021-06-05 15:04:23,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:23,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:23,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:23,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735399251] [2021-06-05 15:04:23,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735399251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:23,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201435317] [2021-06-05 15:04:23,330 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:23,379 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:23,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:23,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:23,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:23,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201435317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:23,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:23,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 15:04:23,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332921392] [2021-06-05 15:04:23,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:23,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:23,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:23,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:23,446 INFO L87 Difference]: Start difference. First operand 928 states and 3172 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:23,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:23,589 INFO L93 Difference]: Finished difference Result 1477 states and 4669 transitions. [2021-06-05 15:04:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:04:23,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 15:04:23,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:23,592 INFO L225 Difference]: With dead ends: 1477 [2021-06-05 15:04:23,592 INFO L226 Difference]: Without dead ends: 1435 [2021-06-05 15:04:23,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:23,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-06-05 15:04:23,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1075. [2021-06-05 15:04:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1074 states have (on average 3.4320297951582868) internal successors, (3686), 1074 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:23,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 3686 transitions. [2021-06-05 15:04:23,616 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 3686 transitions. Word has length 22 [2021-06-05 15:04:23,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:23,616 INFO L482 AbstractCegarLoop]: Abstraction has 1075 states and 3686 transitions. [2021-06-05 15:04:23,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:23,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 3686 transitions. [2021-06-05 15:04:23,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:23,618 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:23,618 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:23,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-06-05 15:04:23,833 INFO L430 AbstractCegarLoop]: === Iteration 71 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:23,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:23,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1381268681, now seen corresponding path program 36 times [2021-06-05 15:04:23,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:23,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035745500] [2021-06-05 15:04:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:23,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:23,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035745500] [2021-06-05 15:04:23,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035745500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:23,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627483561] [2021-06-05 15:04:23,854 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:23,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:04:23,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:23,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:23,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:23,951 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:23,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627483561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:23,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:23,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 15:04:23,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266407772] [2021-06-05 15:04:23,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:23,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:23,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:23,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:23,952 INFO L87 Difference]: Start difference. First operand 1075 states and 3686 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:24,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:24,062 INFO L93 Difference]: Finished difference Result 1825 states and 5875 transitions. [2021-06-05 15:04:24,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:04:24,062 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have 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 15:04:24,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:24,065 INFO L225 Difference]: With dead ends: 1825 [2021-06-05 15:04:24,065 INFO L226 Difference]: Without dead ends: 1825 [2021-06-05 15:04:24,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:04:24,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1825 states. [2021-06-05 15:04:24,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1825 to 1237. [2021-06-05 15:04:24,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1236 states have (on average 3.5032362459546924) internal successors, (4330), 1236 states have internal predecessors, (4330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:24,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 4330 transitions. [2021-06-05 15:04:24,086 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 4330 transitions. Word has length 22 [2021-06-05 15:04:24,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:24,086 INFO L482 AbstractCegarLoop]: Abstraction has 1237 states and 4330 transitions. [2021-06-05 15:04:24,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:24,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 4330 transitions. [2021-06-05 15:04:24,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:24,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:24,088 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:24,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:24,289 INFO L430 AbstractCegarLoop]: === Iteration 72 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:24,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:24,289 INFO L82 PathProgramCache]: Analyzing trace with hash 495943756, now seen corresponding path program 37 times [2021-06-05 15:04:24,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:24,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550627620] [2021-06-05 15:04:24,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:24,309 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:24,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:24,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550627620] [2021-06-05 15:04:24,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550627620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:24,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663558737] [2021-06-05 15:04:24,309 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:24,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:24,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:24,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663558737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:24,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:24,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 15:04:24,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336160211] [2021-06-05 15:04:24,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:24,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:24,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:24,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:24,401 INFO L87 Difference]: Start difference. First operand 1237 states and 4330 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:24,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:24,560 INFO L93 Difference]: Finished difference Result 1507 states and 5030 transitions. [2021-06-05 15:04:24,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:04:24,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 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 22 [2021-06-05 15:04:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:24,563 INFO L225 Difference]: With dead ends: 1507 [2021-06-05 15:04:24,563 INFO L226 Difference]: Without dead ends: 1464 [2021-06-05 15:04:24,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 110.6ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:04:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2021-06-05 15:04:24,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1278. [2021-06-05 15:04:24,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1278 states, 1277 states have (on average 3.534064212999217) internal successors, (4513), 1277 states have internal predecessors, (4513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:24,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1278 states to 1278 states and 4513 transitions. [2021-06-05 15:04:24,580 INFO L78 Accepts]: Start accepts. Automaton has 1278 states and 4513 transitions. Word has length 22 [2021-06-05 15:04:24,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:24,580 INFO L482 AbstractCegarLoop]: Abstraction has 1278 states and 4513 transitions. [2021-06-05 15:04:24,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:24,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1278 states and 4513 transitions. [2021-06-05 15:04:24,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:24,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:24,582 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:24,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 15:04:24,785 INFO L430 AbstractCegarLoop]: === Iteration 73 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:24,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:24,785 INFO L82 PathProgramCache]: Analyzing trace with hash -112435639, now seen corresponding path program 38 times [2021-06-05 15:04:24,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:24,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797109931] [2021-06-05 15:04:24,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:24,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:04:24,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:24,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797109931] [2021-06-05 15:04:24,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797109931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:24,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342272481] [2021-06-05 15:04:24,808 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:24,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:24,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:24,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:24,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:24,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342272481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:24,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:24,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-05 15:04:24,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973252840] [2021-06-05 15:04:24,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:24,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:24,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:24,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:24,895 INFO L87 Difference]: Start difference. First operand 1278 states and 4513 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:25,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:25,026 INFO L93 Difference]: Finished difference Result 1841 states and 5998 transitions. [2021-06-05 15:04:25,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:04:25,027 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 15:04:25,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:25,029 INFO L225 Difference]: With dead ends: 1841 [2021-06-05 15:04:25,029 INFO L226 Difference]: Without dead ends: 1832 [2021-06-05 15:04:25,029 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:04:25,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2021-06-05 15:04:25,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1224. [2021-06-05 15:04:25,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1223 states have (on average 3.493049877350777) internal successors, (4272), 1223 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:25,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 4272 transitions. [2021-06-05 15:04:25,048 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 4272 transitions. Word has length 22 [2021-06-05 15:04:25,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:25,048 INFO L482 AbstractCegarLoop]: Abstraction has 1224 states and 4272 transitions. [2021-06-05 15:04:25,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:25,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 4272 transitions. [2021-06-05 15:04:25,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:25,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:25,049 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:25,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:25,250 INFO L430 AbstractCegarLoop]: === Iteration 74 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:25,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:25,250 INFO L82 PathProgramCache]: Analyzing trace with hash 38049097, now seen corresponding path program 39 times [2021-06-05 15:04:25,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:25,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173572712] [2021-06-05 15:04:25,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:25,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:25,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173572712] [2021-06-05 15:04:25,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173572712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:25,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585111179] [2021-06-05 15:04:25,291 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:25,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:25,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:25,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:25,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:25,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585111179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:25,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:25,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 15:04:25,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723998585] [2021-06-05 15:04:25,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:04:25,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:25,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:04:25,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:04:25,391 INFO L87 Difference]: Start difference. First operand 1224 states and 4272 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:25,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:25,588 INFO L93 Difference]: Finished difference Result 1811 states and 5904 transitions. [2021-06-05 15:04:25,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:04:25,588 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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 22 [2021-06-05 15:04:25,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:25,591 INFO L225 Difference]: With dead ends: 1811 [2021-06-05 15:04:25,592 INFO L226 Difference]: Without dead ends: 1799 [2021-06-05 15:04:25,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:04:25,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-06-05 15:04:25,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1222. [2021-06-05 15:04:25,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 1221 states have (on average 3.493038493038493) internal successors, (4265), 1221 states have internal predecessors, (4265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:25,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 4265 transitions. [2021-06-05 15:04:25,618 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 4265 transitions. Word has length 22 [2021-06-05 15:04:25,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:25,618 INFO L482 AbstractCegarLoop]: Abstraction has 1222 states and 4265 transitions. [2021-06-05 15:04:25,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:25,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 4265 transitions. [2021-06-05 15:04:25,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:25,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:25,621 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:25,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 15:04:25,841 INFO L430 AbstractCegarLoop]: === Iteration 75 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:25,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:25,841 INFO L82 PathProgramCache]: Analyzing trace with hash 414299473, now seen corresponding path program 40 times [2021-06-05 15:04:25,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:25,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969859788] [2021-06-05 15:04:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:25,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:25,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969859788] [2021-06-05 15:04:25,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969859788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:25,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249014567] [2021-06-05 15:04:25,869 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:25,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:25,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:25,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:25,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:25,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249014567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:25,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:25,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:04:25,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119130993] [2021-06-05 15:04:25,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:25,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:25,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:25,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:25,976 INFO L87 Difference]: Start difference. First operand 1222 states and 4265 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:26,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:26,133 INFO L93 Difference]: Finished difference Result 2184 states and 7117 transitions. [2021-06-05 15:04:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:04:26,133 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 15:04:26,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:26,137 INFO L225 Difference]: With dead ends: 2184 [2021-06-05 15:04:26,137 INFO L226 Difference]: Without dead ends: 2184 [2021-06-05 15:04:26,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:04:26,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-05 15:04:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1282. [2021-06-05 15:04:26,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1281 states have (on average 3.527712724434036) internal successors, (4519), 1281 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:26,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 4519 transitions. [2021-06-05 15:04:26,162 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 4519 transitions. Word has length 22 [2021-06-05 15:04:26,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:26,162 INFO L482 AbstractCegarLoop]: Abstraction has 1282 states and 4519 transitions. [2021-06-05 15:04:26,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:26,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 4519 transitions. [2021-06-05 15:04:26,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:26,165 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:26,165 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:26,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:26,381 INFO L430 AbstractCegarLoop]: === Iteration 76 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:26,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:26,381 INFO L82 PathProgramCache]: Analyzing trace with hash -254499376, now seen corresponding path program 41 times [2021-06-05 15:04:26,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:26,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182461072] [2021-06-05 15:04:26,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:26,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:26,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:26,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182461072] [2021-06-05 15:04:26,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182461072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:26,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186532688] [2021-06-05 15:04:26,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:26,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:26,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:26,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:26,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:26,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:26,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186532688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:26,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:26,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:04:26,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713084360] [2021-06-05 15:04:26,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:26,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:26,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:26,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:26,496 INFO L87 Difference]: Start difference. First operand 1282 states and 4519 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 15:04:26,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:26,691 INFO L93 Difference]: Finished difference Result 1724 states and 5684 transitions. [2021-06-05 15:04:26,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:04:26,691 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 22 [2021-06-05 15:04:26,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:26,694 INFO L225 Difference]: With dead ends: 1724 [2021-06-05 15:04:26,694 INFO L226 Difference]: Without dead ends: 1690 [2021-06-05 15:04:26,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:26,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-06-05 15:04:26,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1281. [2021-06-05 15:04:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1281 states, 1280 states have (on average 3.51484375) internal successors, (4499), 1280 states have internal predecessors, (4499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:26,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 4499 transitions. [2021-06-05 15:04:26,713 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 4499 transitions. Word has length 22 [2021-06-05 15:04:26,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:26,713 INFO L482 AbstractCegarLoop]: Abstraction has 1281 states and 4499 transitions. [2021-06-05 15:04:26,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 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 15:04:26,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 4499 transitions. [2021-06-05 15:04:26,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:26,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:26,716 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:26,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 15:04:26,928 INFO L430 AbstractCegarLoop]: === Iteration 77 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:26,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:26,928 INFO L82 PathProgramCache]: Analyzing trace with hash -811023835, now seen corresponding path program 42 times [2021-06-05 15:04:26,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:26,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177642023] [2021-06-05 15:04:26,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:26,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:26,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177642023] [2021-06-05 15:04:26,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177642023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:26,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627702597] [2021-06-05 15:04:26,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:26,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:04:26,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:26,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:26,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:27,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627702597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:27,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:27,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:04:27,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686909569] [2021-06-05 15:04:27,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:27,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:27,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:27,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:27,034 INFO L87 Difference]: Start difference. First operand 1281 states and 4499 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:27,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:27,195 INFO L93 Difference]: Finished difference Result 2125 states and 6947 transitions. [2021-06-05 15:04:27,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:04:27,195 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 15:04:27,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:27,198 INFO L225 Difference]: With dead ends: 2125 [2021-06-05 15:04:27,198 INFO L226 Difference]: Without dead ends: 2116 [2021-06-05 15:04:27,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-06-05 15:04:27,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1245. [2021-06-05 15:04:27,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 3.485530546623794) internal successors, (4336), 1244 states have internal predecessors, (4336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 4336 transitions. [2021-06-05 15:04:27,223 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 4336 transitions. Word has length 22 [2021-06-05 15:04:27,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:27,223 INFO L482 AbstractCegarLoop]: Abstraction has 1245 states and 4336 transitions. [2021-06-05 15:04:27,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:27,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 4336 transitions. [2021-06-05 15:04:27,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:27,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:27,226 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:27,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-05 15:04:27,441 INFO L430 AbstractCegarLoop]: === Iteration 78 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:27,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1183450264, now seen corresponding path program 43 times [2021-06-05 15:04:27,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:27,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882261135] [2021-06-05 15:04:27,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:27,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:27,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:27,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:27,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882261135] [2021-06-05 15:04:27,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882261135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:27,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051853760] [2021-06-05 15:04:27,465 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:27,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:27,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:27,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051853760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:27,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:27,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:04:27,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865766325] [2021-06-05 15:04:27,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:27,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:27,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:27,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:27,559 INFO L87 Difference]: Start difference. First operand 1245 states and 4336 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:27,671 INFO L93 Difference]: Finished difference Result 1497 states and 4889 transitions. [2021-06-05 15:04:27,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:04:27,671 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 15:04:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:27,673 INFO L225 Difference]: With dead ends: 1497 [2021-06-05 15:04:27,673 INFO L226 Difference]: Without dead ends: 1497 [2021-06-05 15:04:27,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:04:27,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-06-05 15:04:27,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1200. [2021-06-05 15:04:27,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 3.433694745621351) internal successors, (4117), 1199 states have internal predecessors, (4117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 4117 transitions. [2021-06-05 15:04:27,689 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 4117 transitions. Word has length 22 [2021-06-05 15:04:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:27,689 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 4117 transitions. [2021-06-05 15:04:27,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:27,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 4117 transitions. [2021-06-05 15:04:27,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:27,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:27,691 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:27,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 15:04:27,891 INFO L430 AbstractCegarLoop]: === Iteration 79 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:27,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:27,892 INFO L82 PathProgramCache]: Analyzing trace with hash -496279263, now seen corresponding path program 44 times [2021-06-05 15:04:27,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:27,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360346118] [2021-06-05 15:04:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:27,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:27,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360346118] [2021-06-05 15:04:27,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360346118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:27,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891322246] [2021-06-05 15:04:27,926 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:27,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:27,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:27,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:27,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:28,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891322246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:28,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:28,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 15:04:28,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854708849] [2021-06-05 15:04:28,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:04:28,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:28,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:04:28,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:04:28,033 INFO L87 Difference]: Start difference. First operand 1200 states and 4117 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:28,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:28,192 INFO L93 Difference]: Finished difference Result 1698 states and 5519 transitions. [2021-06-05 15:04:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:04:28,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 15:04:28,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:28,196 INFO L225 Difference]: With dead ends: 1698 [2021-06-05 15:04:28,196 INFO L226 Difference]: Without dead ends: 1690 [2021-06-05 15:04:28,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:28,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1690 states. [2021-06-05 15:04:28,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1690 to 1200. [2021-06-05 15:04:28,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 3.4286905754795662) internal successors, (4111), 1199 states have internal predecessors, (4111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 4111 transitions. [2021-06-05 15:04:28,218 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 4111 transitions. Word has length 22 [2021-06-05 15:04:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:28,218 INFO L482 AbstractCegarLoop]: Abstraction has 1200 states and 4111 transitions. [2021-06-05 15:04:28,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:28,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 4111 transitions. [2021-06-05 15:04:28,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:28,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:28,220 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:28,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:28,437 INFO L430 AbstractCegarLoop]: === Iteration 80 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:28,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:28,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1029973939, now seen corresponding path program 45 times [2021-06-05 15:04:28,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:28,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89175540] [2021-06-05 15:04:28,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:28,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:28,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:28,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89175540] [2021-06-05 15:04:28,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89175540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:28,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810089259] [2021-06-05 15:04:28,457 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:28,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:28,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:28,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:28,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:28,523 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:28,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810089259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:28,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:28,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 15:04:28,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732389560] [2021-06-05 15:04:28,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:04:28,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:28,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:04:28,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:04:28,524 INFO L87 Difference]: Start difference. First operand 1200 states and 4111 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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 15:04:28,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:28,588 INFO L93 Difference]: Finished difference Result 1428 states and 4807 transitions. [2021-06-05 15:04:28,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:04:28,589 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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 22 [2021-06-05 15:04:28,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:28,590 INFO L225 Difference]: With dead ends: 1428 [2021-06-05 15:04:28,590 INFO L226 Difference]: Without dead ends: 1419 [2021-06-05 15:04:28,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:04:28,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-06-05 15:04:28,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1199. [2021-06-05 15:04:28,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 3.4298831385642736) internal successors, (4109), 1198 states have internal predecessors, (4109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:28,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 4109 transitions. [2021-06-05 15:04:28,611 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 4109 transitions. Word has length 22 [2021-06-05 15:04:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:28,611 INFO L482 AbstractCegarLoop]: Abstraction has 1199 states and 4109 transitions. [2021-06-05 15:04:28,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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 15:04:28,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 4109 transitions. [2021-06-05 15:04:28,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 15:04:28,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:28,614 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:28,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 15:04:28,836 INFO L430 AbstractCegarLoop]: === Iteration 81 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:28,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:28,836 INFO L82 PathProgramCache]: Analyzing trace with hash -736606674, now seen corresponding path program 46 times [2021-06-05 15:04:28,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:28,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283192370] [2021-06-05 15:04:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:28,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:28,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:28,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283192370] [2021-06-05 15:04:28,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283192370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:28,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804011152] [2021-06-05 15:04:28,857 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:28,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:28,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:28,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:04:28,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:28,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804011152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:28,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:28,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 15:04:28,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644410864] [2021-06-05 15:04:28,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:04:28,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:28,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:04:28,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:04:28,923 INFO L87 Difference]: Start difference. First operand 1199 states and 4109 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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 15:04:28,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:28,986 INFO L93 Difference]: Finished difference Result 1470 states and 4948 transitions. [2021-06-05 15:04:28,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:04:28,986 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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 22 [2021-06-05 15:04:28,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:28,988 INFO L225 Difference]: With dead ends: 1470 [2021-06-05 15:04:28,988 INFO L226 Difference]: Without dead ends: 1470 [2021-06-05 15:04:28,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:04:28,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-06-05 15:04:28,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1208. [2021-06-05 15:04:29,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1207 states have (on average 3.432477216238608) internal successors, (4143), 1207 states have internal predecessors, (4143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:29,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 4143 transitions. [2021-06-05 15:04:29,003 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 4143 transitions. Word has length 22 [2021-06-05 15:04:29,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:29,003 INFO L482 AbstractCegarLoop]: Abstraction has 1208 states and 4143 transitions. [2021-06-05 15:04:29,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 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 15:04:29,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 4143 transitions. [2021-06-05 15:04:29,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:04:29,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:29,004 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:29,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:29,205 INFO L430 AbstractCegarLoop]: === Iteration 82 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:29,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:29,205 INFO L82 PathProgramCache]: Analyzing trace with hash -834579384, now seen corresponding path program 47 times [2021-06-05 15:04:29,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:29,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674040073] [2021-06-05 15:04:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:29,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:29,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:29,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:29,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674040073] [2021-06-05 15:04:29,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674040073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:29,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301416086] [2021-06-05 15:04:29,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:29,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:29,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:29,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:29,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:29,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:29,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:29,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:29,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:29,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:04:29,635 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:29,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301416086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:29,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:29,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:04:29,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334255742] [2021-06-05 15:04:29,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:29,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:29,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:29,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:29,636 INFO L87 Difference]: Start difference. First operand 1208 states and 4143 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:33,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:33,231 INFO L93 Difference]: Finished difference Result 4448 states and 15165 transitions. [2021-06-05 15:04:33,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 15:04:33,231 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:04:33,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:33,237 INFO L225 Difference]: With dead ends: 4448 [2021-06-05 15:04:33,237 INFO L226 Difference]: Without dead ends: 4426 [2021-06-05 15:04:33,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 2814.9ms TimeCoverageRelationStatistics Valid=1022, Invalid=5620, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 15:04:33,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-06-05 15:04:33,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 1303. [2021-06-05 15:04:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.4400921658986174) internal successors, (4479), 1302 states have internal predecessors, (4479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:33,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4479 transitions. [2021-06-05 15:04:33,267 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4479 transitions. Word has length 24 [2021-06-05 15:04:33,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:33,267 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 4479 transitions. [2021-06-05 15:04:33,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:33,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4479 transitions. [2021-06-05 15:04:33,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:04:33,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:33,269 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:33,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 15:04:33,470 INFO L430 AbstractCegarLoop]: === Iteration 83 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:33,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:33,470 INFO L82 PathProgramCache]: Analyzing trace with hash 965720304, now seen corresponding path program 48 times [2021-06-05 15:04:33,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:33,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016490659] [2021-06-05 15:04:33,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:33,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:33,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016490659] [2021-06-05 15:04:33,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016490659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:33,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123729334] [2021-06-05 15:04:33,684 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:33,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:04:33,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:33,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:04:33,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:33,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:33,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:33,942 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:33,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 53 [2021-06-05 15:04:33,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:34,014 INFO L628 ElimStorePlain]: treesize reduction 37, result has 49.3 percent of original size [2021-06-05 15:04:34,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:34,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-06-05 15:04:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:34,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123729334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:34,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:34,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2021-06-05 15:04:34,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664338933] [2021-06-05 15:04:34,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:04:34,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:34,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:04:34,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:04:34,113 INFO L87 Difference]: Start difference. First operand 1303 states and 4479 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:37,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:37,180 INFO L93 Difference]: Finished difference Result 2829 states and 9372 transitions. [2021-06-05 15:04:37,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 15:04:37,180 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:04:37,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:37,184 INFO L225 Difference]: With dead ends: 2829 [2021-06-05 15:04:37,185 INFO L226 Difference]: Without dead ends: 2799 [2021-06-05 15:04:37,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 2423.8ms TimeCoverageRelationStatistics Valid=661, Invalid=3121, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 15:04:37,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2799 states. [2021-06-05 15:04:37,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2799 to 1316. [2021-06-05 15:04:37,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1315 states have (on average 3.4403041825095055) internal successors, (4524), 1315 states have internal predecessors, (4524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 4524 transitions. [2021-06-05 15:04:37,206 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 4524 transitions. Word has length 24 [2021-06-05 15:04:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:37,206 INFO L482 AbstractCegarLoop]: Abstraction has 1316 states and 4524 transitions. [2021-06-05 15:04:37,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 4524 transitions. [2021-06-05 15:04:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:04:37,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:37,208 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:37,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:37,409 INFO L430 AbstractCegarLoop]: === Iteration 84 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:37,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:37,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1186871304, now seen corresponding path program 49 times [2021-06-05 15:04:37,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:37,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365791566] [2021-06-05 15:04:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:37,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:37,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365791566] [2021-06-05 15:04:37,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365791566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:37,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972174119] [2021-06-05 15:04:37,666 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:37,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:37,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:37,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:37,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:37,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:37,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:37,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:37,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:04:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:37,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972174119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:37,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:37,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:04:37,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249909557] [2021-06-05 15:04:37,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:37,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:37,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:37,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:37,952 INFO L87 Difference]: Start difference. First operand 1316 states and 4524 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:39,661 INFO L93 Difference]: Finished difference Result 2754 states and 9152 transitions. [2021-06-05 15:04:39,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:04:39,661 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:04:39,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:39,666 INFO L225 Difference]: With dead ends: 2754 [2021-06-05 15:04:39,666 INFO L226 Difference]: Without dead ends: 2720 [2021-06-05 15:04:39,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1430.4ms TimeCoverageRelationStatistics Valid=379, Invalid=2171, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:04:39,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2021-06-05 15:04:39,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 1330. [2021-06-05 15:04:39,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 3.443190368698269) internal successors, (4576), 1329 states have internal predecessors, (4576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:39,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 4576 transitions. [2021-06-05 15:04:39,688 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 4576 transitions. Word has length 24 [2021-06-05 15:04:39,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:39,688 INFO L482 AbstractCegarLoop]: Abstraction has 1330 states and 4576 transitions. [2021-06-05 15:04:39,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 4576 transitions. [2021-06-05 15:04:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:04:39,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:39,690 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:39,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:39,905 INFO L430 AbstractCegarLoop]: === Iteration 85 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:39,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:39,905 INFO L82 PathProgramCache]: Analyzing trace with hash 749372208, now seen corresponding path program 50 times [2021-06-05 15:04:39,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:39,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258925037] [2021-06-05 15:04:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:40,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:40,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258925037] [2021-06-05 15:04:40,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258925037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:40,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514016639] [2021-06-05 15:04:40,104 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:40,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:40,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:40,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:04:40,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:40,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:40,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:40,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:40,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:40,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:15 [2021-06-05 15:04:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:40,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514016639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:40,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:40,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:04:40,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891663931] [2021-06-05 15:04:40,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:04:40,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:40,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:04:40,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:04:40,407 INFO L87 Difference]: Start difference. First operand 1330 states and 4576 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:41,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:41,510 INFO L93 Difference]: Finished difference Result 2450 states and 8194 transitions. [2021-06-05 15:04:41,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:04:41,510 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:04:41,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:41,514 INFO L225 Difference]: With dead ends: 2450 [2021-06-05 15:04:41,514 INFO L226 Difference]: Without dead ends: 2391 [2021-06-05 15:04:41,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 927.4ms TimeCoverageRelationStatistics Valid=289, Invalid=1517, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:04:41,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-06-05 15:04:41,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1349. [2021-06-05 15:04:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.438427299703264) internal successors, (4635), 1348 states have internal predecessors, (4635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:41,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4635 transitions. [2021-06-05 15:04:41,535 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4635 transitions. Word has length 24 [2021-06-05 15:04:41,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:41,535 INFO L482 AbstractCegarLoop]: Abstraction has 1349 states and 4635 transitions. [2021-06-05 15:04:41,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:41,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4635 transitions. [2021-06-05 15:04:41,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:04:41,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:41,537 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:41,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:41,738 INFO L430 AbstractCegarLoop]: === Iteration 86 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:41,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:41,738 INFO L82 PathProgramCache]: Analyzing trace with hash 572830776, now seen corresponding path program 51 times [2021-06-05 15:04:41,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:41,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411186133] [2021-06-05 15:04:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:41,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:41,921 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:41,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:41,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411186133] [2021-06-05 15:04:41,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411186133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:41,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843041719] [2021-06-05 15:04:41,922 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:41,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:04:41,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:41,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:41,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:42,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:42,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:42,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:42,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:04:42,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:42,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:42,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:42,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:50 [2021-06-05 15:04:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:42,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843041719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:42,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:42,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:04:42,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986121693] [2021-06-05 15:04:42,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:04:42,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:42,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:04:42,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:04:42,334 INFO L87 Difference]: Start difference. First operand 1349 states and 4635 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:44,199 INFO L93 Difference]: Finished difference Result 2472 states and 8251 transitions. [2021-06-05 15:04:44,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:04:44,200 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:04:44,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:44,203 INFO L225 Difference]: With dead ends: 2472 [2021-06-05 15:04:44,203 INFO L226 Difference]: Without dead ends: 2452 [2021-06-05 15:04:44,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1611.2ms TimeCoverageRelationStatistics Valid=478, Invalid=2602, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:04:44,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2452 states. [2021-06-05 15:04:44,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2452 to 1352. [2021-06-05 15:04:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.4374537379718726) internal successors, (4644), 1351 states have internal predecessors, (4644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:44,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4644 transitions. [2021-06-05 15:04:44,224 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4644 transitions. Word has length 24 [2021-06-05 15:04:44,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:44,224 INFO L482 AbstractCegarLoop]: Abstraction has 1352 states and 4644 transitions. [2021-06-05 15:04:44,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:44,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4644 transitions. [2021-06-05 15:04:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:04:44,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:44,226 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:44,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:44,427 INFO L430 AbstractCegarLoop]: === Iteration 87 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:44,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:44,427 INFO L82 PathProgramCache]: Analyzing trace with hash -260907664, now seen corresponding path program 52 times [2021-06-05 15:04:44,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:44,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986845343] [2021-06-05 15:04:44,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:44,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:44,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986845343] [2021-06-05 15:04:44,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986845343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:44,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020328168] [2021-06-05 15:04:44,627 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:44,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:44,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:44,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:44,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:44,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:04:44,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:44,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:44,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:44,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:04:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:44,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020328168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:44,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:44,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:04:44,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599535009] [2021-06-05 15:04:44,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:04:44,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:44,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:04:44,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:44,836 INFO L87 Difference]: Start difference. First operand 1352 states and 4644 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:45,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:45,903 INFO L93 Difference]: Finished difference Result 2456 states and 8262 transitions. [2021-06-05 15:04:45,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:04:45,904 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:04:45,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:45,907 INFO L225 Difference]: With dead ends: 2456 [2021-06-05 15:04:45,907 INFO L226 Difference]: Without dead ends: 2445 [2021-06-05 15:04:45,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 821.4ms TimeCoverageRelationStatistics Valid=271, Invalid=1451, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:04:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-06-05 15:04:45,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 1353. [2021-06-05 15:04:45,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 3.44008875739645) internal successors, (4651), 1352 states have internal predecessors, (4651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:45,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 4651 transitions. [2021-06-05 15:04:45,928 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 4651 transitions. Word has length 24 [2021-06-05 15:04:45,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:45,928 INFO L482 AbstractCegarLoop]: Abstraction has 1353 states and 4651 transitions. [2021-06-05 15:04:45,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:45,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 4651 transitions. [2021-06-05 15:04:45,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:04:45,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:45,930 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:46,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:46,130 INFO L430 AbstractCegarLoop]: === Iteration 88 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:46,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:46,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1760921938, now seen corresponding path program 1 times [2021-06-05 15:04:46,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:46,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616357546] [2021-06-05 15:04:46,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:46,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:46,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:46,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616357546] [2021-06-05 15:04:46,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616357546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:46,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620251442] [2021-06-05 15:04:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:46,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:46,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:46,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:46,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:46,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:46,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:46,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:46,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:04:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:46,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620251442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:46,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:46,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:04:46,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491672083] [2021-06-05 15:04:46,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:46,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:46,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:46,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:46,604 INFO L87 Difference]: Start difference. First operand 1353 states and 4651 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:49,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:49,829 INFO L93 Difference]: Finished difference Result 3805 states and 13021 transitions. [2021-06-05 15:04:49,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:04:49,829 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:04:49,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:49,836 INFO L225 Difference]: With dead ends: 3805 [2021-06-05 15:04:49,836 INFO L226 Difference]: Without dead ends: 3786 [2021-06-05 15:04:49,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 2523.2ms TimeCoverageRelationStatistics Valid=761, Invalid=4351, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:04:49,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2021-06-05 15:04:49,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 1388. [2021-06-05 15:04:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 3.4491708723864454) internal successors, (4784), 1387 states have internal predecessors, (4784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:49,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 4784 transitions. [2021-06-05 15:04:49,878 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 4784 transitions. Word has length 24 [2021-06-05 15:04:49,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:49,878 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 4784 transitions. [2021-06-05 15:04:49,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:49,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 4784 transitions. [2021-06-05 15:04:49,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:04:49,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:49,880 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:50,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:50,081 INFO L430 AbstractCegarLoop]: === Iteration 89 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:50,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:50,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1251406074, now seen corresponding path program 2 times [2021-06-05 15:04:50,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:50,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418647486] [2021-06-05 15:04:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:50,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:50,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418647486] [2021-06-05 15:04:50,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418647486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:50,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714655231] [2021-06-05 15:04:50,267 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:50,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:50,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:50,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:04:50,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:50,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:50,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:50,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:50,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:50,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:50,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:50,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:04:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:50,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714655231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:50,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:50,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:04:50,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999817624] [2021-06-05 15:04:50,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:04:50,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:50,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:04:50,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:04:50,584 INFO L87 Difference]: Start difference. First operand 1388 states and 4784 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:52,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:52,282 INFO L93 Difference]: Finished difference Result 2357 states and 8002 transitions. [2021-06-05 15:04:52,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:04:52,283 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:04:52,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:52,287 INFO L225 Difference]: With dead ends: 2357 [2021-06-05 15:04:52,287 INFO L226 Difference]: Without dead ends: 2348 [2021-06-05 15:04:52,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1310.9ms TimeCoverageRelationStatistics Valid=376, Invalid=2276, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:04:52,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2021-06-05 15:04:52,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1398. [2021-06-05 15:04:52,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 3.45025053686471) internal successors, (4820), 1397 states have internal predecessors, (4820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:52,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 4820 transitions. [2021-06-05 15:04:52,307 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 4820 transitions. Word has length 24 [2021-06-05 15:04:52,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:52,307 INFO L482 AbstractCegarLoop]: Abstraction has 1398 states and 4820 transitions. [2021-06-05 15:04:52,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:52,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 4820 transitions. [2021-06-05 15:04:52,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:04:52,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:52,309 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:52,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 15:04:52,509 INFO L430 AbstractCegarLoop]: === Iteration 90 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:52,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:52,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1041868694, now seen corresponding path program 3 times [2021-06-05 15:04:52,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:52,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388827354] [2021-06-05 15:04:52,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:52,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:52,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388827354] [2021-06-05 15:04:52,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388827354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:52,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003290320] [2021-06-05 15:04:52,715 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:52,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:52,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:52,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:52,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:52,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:52,917 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:52,918 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:52,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:52,919 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:04:52,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:52,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003290320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:52,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:52,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:04:52,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45683666] [2021-06-05 15:04:52,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:52,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:52,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:52,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:52,948 INFO L87 Difference]: Start difference. First operand 1398 states and 4820 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:54,545 INFO L93 Difference]: Finished difference Result 2538 states and 8518 transitions. [2021-06-05 15:04:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:04:54,545 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:04:54,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:54,549 INFO L225 Difference]: With dead ends: 2538 [2021-06-05 15:04:54,549 INFO L226 Difference]: Without dead ends: 2509 [2021-06-05 15:04:54,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 1221.3ms TimeCoverageRelationStatistics Valid=348, Invalid=2004, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:04:54,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2509 states. [2021-06-05 15:04:54,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2509 to 1408. [2021-06-05 15:04:54,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1407 states have (on average 3.4534470504619756) internal successors, (4859), 1407 states have internal predecessors, (4859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:54,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 4859 transitions. [2021-06-05 15:04:54,569 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 4859 transitions. Word has length 24 [2021-06-05 15:04:54,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:54,570 INFO L482 AbstractCegarLoop]: Abstraction has 1408 states and 4859 transitions. [2021-06-05 15:04:54,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:54,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 4859 transitions. [2021-06-05 15:04:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:04:54,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:54,572 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:54,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 15:04:54,789 INFO L430 AbstractCegarLoop]: === Iteration 91 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:54,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:54,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1524426856, now seen corresponding path program 4 times [2021-06-05 15:04:54,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:54,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360619202] [2021-06-05 15:04:54,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:55,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:55,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360619202] [2021-06-05 15:04:55,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360619202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:55,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572750403] [2021-06-05 15:04:55,003 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:55,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:55,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:55,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:55,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:55,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:04:55,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:55,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:55,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:55,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:04:55,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:55,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572750403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:55,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:55,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:04:55,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236269401] [2021-06-05 15:04:55,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:04:55,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:55,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:04:55,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:04:55,207 INFO L87 Difference]: Start difference. First operand 1408 states and 4859 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:56,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:56,644 INFO L93 Difference]: Finished difference Result 2473 states and 8324 transitions. [2021-06-05 15:04:56,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:04:56,644 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:04:56,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:56,648 INFO L225 Difference]: With dead ends: 2473 [2021-06-05 15:04:56,648 INFO L226 Difference]: Without dead ends: 2444 [2021-06-05 15:04:56,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1132.6ms TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:04:56,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2021-06-05 15:04:56,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 1402. [2021-06-05 15:04:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1401 states have (on average 3.457530335474661) internal successors, (4844), 1401 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 4844 transitions. [2021-06-05 15:04:56,670 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 4844 transitions. Word has length 24 [2021-06-05 15:04:56,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:56,670 INFO L482 AbstractCegarLoop]: Abstraction has 1402 states and 4844 transitions. [2021-06-05 15:04:56,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:56,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 4844 transitions. [2021-06-05 15:04:56,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:04:56,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:56,673 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:56,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:56,873 INFO L430 AbstractCegarLoop]: === Iteration 92 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:56,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:56,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1742390580, now seen corresponding path program 5 times [2021-06-05 15:04:56,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:56,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370238308] [2021-06-05 15:04:56,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:56,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:57,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:57,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370238308] [2021-06-05 15:04:57,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370238308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:57,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977628317] [2021-06-05 15:04:57,080 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:57,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:57,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:57,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:57,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:57,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:04:57,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:57,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:57,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:57,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:04:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:57,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977628317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:57,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:57,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:04:57,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123948777] [2021-06-05 15:04:57,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:04:57,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:57,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:04:57,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:04:57,327 INFO L87 Difference]: Start difference. First operand 1402 states and 4844 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:58,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:58,150 INFO L93 Difference]: Finished difference Result 2298 states and 7819 transitions. [2021-06-05 15:04:58,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:04:58,151 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:04:58,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:58,154 INFO L225 Difference]: With dead ends: 2298 [2021-06-05 15:04:58,154 INFO L226 Difference]: Without dead ends: 2289 [2021-06-05 15:04:58,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 685.2ms TimeCoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:04:58,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2289 states. [2021-06-05 15:04:58,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2289 to 1415. [2021-06-05 15:04:58,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1415 states, 1414 states have (on average 3.454031117397454) internal successors, (4884), 1414 states have internal predecessors, (4884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:58,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1415 states to 1415 states and 4884 transitions. [2021-06-05 15:04:58,174 INFO L78 Accepts]: Start accepts. Automaton has 1415 states and 4884 transitions. Word has length 24 [2021-06-05 15:04:58,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:58,175 INFO L482 AbstractCegarLoop]: Abstraction has 1415 states and 4884 transitions. [2021-06-05 15:04:58,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:58,175 INFO L276 IsEmpty]: Start isEmpty. Operand 1415 states and 4884 transitions. [2021-06-05 15:04:58,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:04:58,177 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:58,177 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:58,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:58,377 INFO L430 AbstractCegarLoop]: === Iteration 93 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:04:58,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:58,377 INFO L82 PathProgramCache]: Analyzing trace with hash 2065976758, now seen corresponding path program 6 times [2021-06-05 15:04:58,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:58,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217608482] [2021-06-05 15:04:58,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:58,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:58,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217608482] [2021-06-05 15:04:58,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217608482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:58,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645239622] [2021-06-05 15:04:58,565 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:58,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:04:58,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:58,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:58,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:58,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:58,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:58,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:58,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:58,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 15:04:58,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:58,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:58,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:58,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-06-05 15:04:58,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:58,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645239622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:58,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:58,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:04:58,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969771459] [2021-06-05 15:04:58,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:04:58,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:58,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:04:58,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:04:58,892 INFO L87 Difference]: Start difference. First operand 1415 states and 4884 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:00,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:00,781 INFO L93 Difference]: Finished difference Result 2286 states and 7759 transitions. [2021-06-05 15:05:00,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:05:00,781 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:00,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:00,784 INFO L225 Difference]: With dead ends: 2286 [2021-06-05 15:05:00,784 INFO L226 Difference]: Without dead ends: 2277 [2021-06-05 15:05:00,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1661.2ms TimeCoverageRelationStatistics Valid=540, Invalid=2322, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:05:00,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-06-05 15:05:00,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1418. [2021-06-05 15:05:00,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1417 states have (on average 3.455892731122089) internal successors, (4897), 1417 states have internal predecessors, (4897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:00,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 4897 transitions. [2021-06-05 15:05:00,803 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 4897 transitions. Word has length 24 [2021-06-05 15:05:00,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:00,803 INFO L482 AbstractCegarLoop]: Abstraction has 1418 states and 4897 transitions. [2021-06-05 15:05:00,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:00,803 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 4897 transitions. [2021-06-05 15:05:00,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:00,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:00,805 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:01,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:01,006 INFO L430 AbstractCegarLoop]: === Iteration 94 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:01,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:01,006 INFO L82 PathProgramCache]: Analyzing trace with hash -543246416, now seen corresponding path program 7 times [2021-06-05 15:05:01,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:01,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712781727] [2021-06-05 15:05:01,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:01,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:01,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:01,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712781727] [2021-06-05 15:05:01,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712781727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:01,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729410077] [2021-06-05 15:05:01,165 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:01,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:01,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:01,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:01,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:05:01,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:01,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:01,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:01,365 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:05:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:01,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729410077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:01,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:01,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:05:01,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049742571] [2021-06-05 15:05:01,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:05:01,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:01,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:05:01,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:05:01,408 INFO L87 Difference]: Start difference. First operand 1418 states and 4897 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:02,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:02,190 INFO L93 Difference]: Finished difference Result 2241 states and 7629 transitions. [2021-06-05 15:05:02,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:05:02,191 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:02,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:02,194 INFO L225 Difference]: With dead ends: 2241 [2021-06-05 15:05:02,194 INFO L226 Difference]: Without dead ends: 2230 [2021-06-05 15:05:02,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 652.6ms TimeCoverageRelationStatistics Valid=178, Invalid=1012, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:05:02,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-06-05 15:05:02,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 1410. [2021-06-05 15:05:02,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1410 states, 1409 states have (on average 3.4570617459190918) internal successors, (4871), 1409 states have internal predecessors, (4871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:02,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1410 states to 1410 states and 4871 transitions. [2021-06-05 15:05:02,212 INFO L78 Accepts]: Start accepts. Automaton has 1410 states and 4871 transitions. Word has length 24 [2021-06-05 15:05:02,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:02,213 INFO L482 AbstractCegarLoop]: Abstraction has 1410 states and 4871 transitions. [2021-06-05 15:05:02,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:02,213 INFO L276 IsEmpty]: Start isEmpty. Operand 1410 states and 4871 transitions. [2021-06-05 15:05:02,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:02,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:02,215 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:02,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 15:05:02,415 INFO L430 AbstractCegarLoop]: === Iteration 95 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:02,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:02,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1059751936, now seen corresponding path program 53 times [2021-06-05 15:05:02,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:02,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825768550] [2021-06-05 15:05:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:02,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:02,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825768550] [2021-06-05 15:05:02,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825768550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:02,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692644323] [2021-06-05 15:05:02,656 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:02,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:05:02,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:02,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:02,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:02,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:02,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:02,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:02,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:02,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:05:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:02,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692644323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:02,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:02,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:05:02,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902282160] [2021-06-05 15:05:02,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:02,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:02,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:02,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:02,897 INFO L87 Difference]: Start difference. First operand 1410 states and 4871 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:04,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:04,074 INFO L93 Difference]: Finished difference Result 2280 states and 7676 transitions. [2021-06-05 15:05:04,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:05:04,075 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:04,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:04,078 INFO L225 Difference]: With dead ends: 2280 [2021-06-05 15:05:04,078 INFO L226 Difference]: Without dead ends: 2270 [2021-06-05 15:05:04,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 818.9ms TimeCoverageRelationStatistics Valid=245, Invalid=1647, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:05:04,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-06-05 15:05:04,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1412. [2021-06-05 15:05:04,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 3.4564138908575477) internal successors, (4877), 1411 states have internal predecessors, (4877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:04,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4877 transitions. [2021-06-05 15:05:04,105 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4877 transitions. Word has length 24 [2021-06-05 15:05:04,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:04,105 INFO L482 AbstractCegarLoop]: Abstraction has 1412 states and 4877 transitions. [2021-06-05 15:05:04,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:04,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4877 transitions. [2021-06-05 15:05:04,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:04,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:04,107 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:04,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 15:05:04,308 INFO L430 AbstractCegarLoop]: === Iteration 96 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:04,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:04,308 INFO L82 PathProgramCache]: Analyzing trace with hash -448330122, now seen corresponding path program 54 times [2021-06-05 15:05:04,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:04,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054718148] [2021-06-05 15:05:04,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:04,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:04,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054718148] [2021-06-05 15:05:04,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054718148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:04,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307382166] [2021-06-05 15:05:04,523 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:04,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:05:04,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:04,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:05:04,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:04,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:04,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:04,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:04,880 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:04,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 15:05:04,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:05:04,915 INFO L628 ElimStorePlain]: treesize reduction 29, result has 52.5 percent of original size [2021-06-05 15:05:04,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:04,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:21 [2021-06-05 15:05:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:05,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307382166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:05,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:05,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:05:05,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056485475] [2021-06-05 15:05:05,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:05:05,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:05,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:05:05,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:05:05,008 INFO L87 Difference]: Start difference. First operand 1412 states and 4877 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:06,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:06,204 INFO L93 Difference]: Finished difference Result 2222 states and 7429 transitions. [2021-06-05 15:05:06,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:05:06,204 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:06,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:06,208 INFO L225 Difference]: With dead ends: 2222 [2021-06-05 15:05:06,208 INFO L226 Difference]: Without dead ends: 2190 [2021-06-05 15:05:06,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 842.6ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:05:06,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-06-05 15:05:06,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1424. [2021-06-05 15:05:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 3.456078706957133) internal successors, (4918), 1423 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 15:05:06,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 4918 transitions. [2021-06-05 15:05:06,240 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 4918 transitions. Word has length 24 [2021-06-05 15:05:06,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:06,240 INFO L482 AbstractCegarLoop]: Abstraction has 1424 states and 4918 transitions. [2021-06-05 15:05:06,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:06,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 4918 transitions. [2021-06-05 15:05:06,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:06,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:06,243 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:06,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:06,465 INFO L430 AbstractCegarLoop]: === Iteration 97 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:06,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:06,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1487913390, now seen corresponding path program 55 times [2021-06-05 15:05:06,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:06,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539317405] [2021-06-05 15:05:06,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:06,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:06,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539317405] [2021-06-05 15:05:06,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539317405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:06,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838191933] [2021-06-05 15:05:06,671 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:06,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:06,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:06,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:06,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:06,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:06,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:06,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:05:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:06,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838191933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:06,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:06,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:05:06,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001872920] [2021-06-05 15:05:06,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:06,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:06,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:06,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:06,904 INFO L87 Difference]: Start difference. First operand 1424 states and 4918 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:08,004 INFO L93 Difference]: Finished difference Result 2213 states and 7447 transitions. [2021-06-05 15:05:08,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:05:08,005 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:08,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:08,009 INFO L225 Difference]: With dead ends: 2213 [2021-06-05 15:05:08,009 INFO L226 Difference]: Without dead ends: 2191 [2021-06-05 15:05:08,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 833.6ms TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:05:08,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2021-06-05 15:05:08,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 1426. [2021-06-05 15:05:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.4596491228070176) internal successors, (4930), 1425 states have internal predecessors, (4930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:08,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 4930 transitions. [2021-06-05 15:05:08,030 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 4930 transitions. Word has length 24 [2021-06-05 15:05:08,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:08,030 INFO L482 AbstractCegarLoop]: Abstraction has 1426 states and 4930 transitions. [2021-06-05 15:05:08,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 4930 transitions. [2021-06-05 15:05:08,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:08,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:08,032 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:08,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-05 15:05:08,237 INFO L430 AbstractCegarLoop]: === Iteration 98 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:08,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:08,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1311371958, now seen corresponding path program 56 times [2021-06-05 15:05:08,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:08,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658412146] [2021-06-05 15:05:08,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:08,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:08,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658412146] [2021-06-05 15:05:08,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658412146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:08,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138160098] [2021-06-05 15:05:08,421 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:08,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:08,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:08,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:05:08,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:08,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:08,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:05:08,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:08,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:08,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:08,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:05:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:08,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138160098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:08,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:08,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:05:08,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874144875] [2021-06-05 15:05:08,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:08,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:08,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:08,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:08,695 INFO L87 Difference]: Start difference. First operand 1426 states and 4930 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:09,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:09,640 INFO L93 Difference]: Finished difference Result 2144 states and 7220 transitions. [2021-06-05 15:05:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:05:09,640 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:09,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:09,643 INFO L225 Difference]: With dead ends: 2144 [2021-06-05 15:05:09,644 INFO L226 Difference]: Without dead ends: 2134 [2021-06-05 15:05:09,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 808.1ms TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:05:09,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2134 states. [2021-06-05 15:05:09,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2134 to 1432. [2021-06-05 15:05:09,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1432 states, 1431 states have (on average 3.4556254367575123) internal successors, (4945), 1431 states have internal predecessors, (4945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 4945 transitions. [2021-06-05 15:05:09,665 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 4945 transitions. Word has length 24 [2021-06-05 15:05:09,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:09,665 INFO L482 AbstractCegarLoop]: Abstraction has 1432 states and 4945 transitions. [2021-06-05 15:05:09,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:09,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 4945 transitions. [2021-06-05 15:05:09,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:09,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:09,667 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:09,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-05 15:05:09,869 INFO L430 AbstractCegarLoop]: === Iteration 99 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:09,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:09,869 INFO L82 PathProgramCache]: Analyzing trace with hash 477633518, now seen corresponding path program 57 times [2021-06-05 15:05:09,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:09,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237104252] [2021-06-05 15:05:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:10,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:10,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237104252] [2021-06-05 15:05:10,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237104252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:10,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279051570] [2021-06-05 15:05:10,046 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:10,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:05:10,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:10,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:10,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:10,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:10,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:10,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:05:10,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:10,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:10,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:10,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:46 [2021-06-05 15:05:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:10,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279051570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:10,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:10,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:05:10,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500230291] [2021-06-05 15:05:10,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:10,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:10,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:10,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:10,412 INFO L87 Difference]: Start difference. First operand 1432 states and 4945 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:12,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:12,192 INFO L93 Difference]: Finished difference Result 2174 states and 7260 transitions. [2021-06-05 15:05:12,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:05:12,192 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:12,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:12,195 INFO L225 Difference]: With dead ends: 2174 [2021-06-05 15:05:12,195 INFO L226 Difference]: Without dead ends: 2163 [2021-06-05 15:05:12,196 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1453.1ms TimeCoverageRelationStatistics Valid=384, Invalid=2268, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:05:12,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-05 15:05:12,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1456. [2021-06-05 15:05:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.454982817869416) internal successors, (5027), 1455 states have internal predecessors, (5027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:12,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5027 transitions. [2021-06-05 15:05:12,224 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5027 transitions. Word has length 24 [2021-06-05 15:05:12,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:12,224 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 5027 transitions. [2021-06-05 15:05:12,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:12,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5027 transitions. [2021-06-05 15:05:12,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:12,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:12,227 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:12,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 15:05:12,441 INFO L430 AbstractCegarLoop]: === Iteration 100 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:12,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:12,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1259467318, now seen corresponding path program 58 times [2021-06-05 15:05:12,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:12,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879853705] [2021-06-05 15:05:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:12,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:12,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:12,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:12,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879853705] [2021-06-05 15:05:12,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879853705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:12,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987249991] [2021-06-05 15:05:12,616 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:12,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:12,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:12,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:12,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:12,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:05:12,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:12,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:12,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:12,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:05:12,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:12,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987249991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:12,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:12,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:05:12,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508553429] [2021-06-05 15:05:12,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:05:12,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:12,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:05:12,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:05:12,822 INFO L87 Difference]: Start difference. First operand 1456 states and 5027 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:13,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:13,609 INFO L93 Difference]: Finished difference Result 2091 states and 7062 transitions. [2021-06-05 15:05:13,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:05:13,610 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:13,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:13,613 INFO L225 Difference]: With dead ends: 2091 [2021-06-05 15:05:13,613 INFO L226 Difference]: Without dead ends: 2080 [2021-06-05 15:05:13,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 583.0ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:05:13,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2021-06-05 15:05:13,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 1453. [2021-06-05 15:05:13,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.4579889807162534) internal successors, (5021), 1452 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:13,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 5021 transitions. [2021-06-05 15:05:13,637 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 5021 transitions. Word has length 24 [2021-06-05 15:05:13,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:13,637 INFO L482 AbstractCegarLoop]: Abstraction has 1453 states and 5021 transitions. [2021-06-05 15:05:13,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:13,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 5021 transitions. [2021-06-05 15:05:13,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:13,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:13,639 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:13,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:13,839 INFO L430 AbstractCegarLoop]: === Iteration 101 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:13,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:13,840 INFO L82 PathProgramCache]: Analyzing trace with hash -291281526, now seen corresponding path program 8 times [2021-06-05 15:05:13,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:13,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689679628] [2021-06-05 15:05:13,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:14,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:14,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689679628] [2021-06-05 15:05:14,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689679628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:14,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405469214] [2021-06-05 15:05:14,012 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:14,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:14,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:14,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:05:14,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:14,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:14,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:05:14,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:14,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:14,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:14,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:14,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:05:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:14,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405469214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:14,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:14,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:05:14,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632342659] [2021-06-05 15:05:14,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:14,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:14,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:14,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:14,308 INFO L87 Difference]: Start difference. First operand 1453 states and 5021 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:15,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:15,304 INFO L93 Difference]: Finished difference Result 2199 states and 7401 transitions. [2021-06-05 15:05:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:05:15,304 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:15,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:15,308 INFO L225 Difference]: With dead ends: 2199 [2021-06-05 15:05:15,308 INFO L226 Difference]: Without dead ends: 2190 [2021-06-05 15:05:15,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 725.8ms TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:05:15,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-06-05 15:05:15,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1453. [2021-06-05 15:05:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 3.4579889807162534) internal successors, (5021), 1452 states have internal predecessors, (5021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:15,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 5021 transitions. [2021-06-05 15:05:15,328 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 5021 transitions. Word has length 24 [2021-06-05 15:05:15,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:15,328 INFO L482 AbstractCegarLoop]: Abstraction has 1453 states and 5021 transitions. [2021-06-05 15:05:15,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:15,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 5021 transitions. [2021-06-05 15:05:15,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:15,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:15,330 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:15,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:15,530 INFO L430 AbstractCegarLoop]: === Iteration 102 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:15,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:15,531 INFO L82 PathProgramCache]: Analyzing trace with hash -500818906, now seen corresponding path program 9 times [2021-06-05 15:05:15,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:15,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536859995] [2021-06-05 15:05:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:15,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:15,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:15,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536859995] [2021-06-05 15:05:15,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536859995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:15,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669012311] [2021-06-05 15:05:15,780 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:15,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:05:15,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:15,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:15,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:15,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:15,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:16,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:16,001 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:16,001 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:05:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:16,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669012311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:16,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:16,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:05:16,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914836130] [2021-06-05 15:05:16,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:16,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:16,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:16,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:16,037 INFO L87 Difference]: Start difference. First operand 1453 states and 5021 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:17,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:17,355 INFO L93 Difference]: Finished difference Result 2243 states and 7546 transitions. [2021-06-05 15:05:17,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:05:17,355 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:17,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:17,359 INFO L225 Difference]: With dead ends: 2243 [2021-06-05 15:05:17,359 INFO L226 Difference]: Without dead ends: 2224 [2021-06-05 15:05:17,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 928.2ms TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:05:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-06-05 15:05:17,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 1462. [2021-06-05 15:05:17,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 3.45927446954141) internal successors, (5054), 1461 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 15:05:17,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 5054 transitions. [2021-06-05 15:05:17,378 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 5054 transitions. Word has length 24 [2021-06-05 15:05:17,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:17,378 INFO L482 AbstractCegarLoop]: Abstraction has 1462 states and 5054 transitions. [2021-06-05 15:05:17,378 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:17,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 5054 transitions. [2021-06-05 15:05:17,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:17,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:17,380 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:17,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:17,580 INFO L430 AbstractCegarLoop]: === Iteration 103 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:17,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:17,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1227852840, now seen corresponding path program 10 times [2021-06-05 15:05:17,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:17,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876205244] [2021-06-05 15:05:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:17,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:17,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876205244] [2021-06-05 15:05:17,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876205244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:17,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754598202] [2021-06-05 15:05:17,787 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:17,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:17,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:17,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:17,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:17,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:17,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:17,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:17,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:17,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:05:17,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:17,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754598202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:17,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:17,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:05:17,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393689227] [2021-06-05 15:05:17,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:17,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:17,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:17,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:17,993 INFO L87 Difference]: Start difference. First operand 1462 states and 5054 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:19,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:19,104 INFO L93 Difference]: Finished difference Result 2195 states and 7404 transitions. [2021-06-05 15:05:19,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:05:19,104 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:19,108 INFO L225 Difference]: With dead ends: 2195 [2021-06-05 15:05:19,108 INFO L226 Difference]: Without dead ends: 2176 [2021-06-05 15:05:19,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 801.3ms TimeCoverageRelationStatistics Valid=235, Invalid=1487, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:05:19,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2176 states. [2021-06-05 15:05:19,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2176 to 1460. [2021-06-05 15:05:19,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1460 states, 1459 states have (on average 3.4619602467443453) internal successors, (5051), 1459 states have internal predecessors, (5051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:19,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1460 states to 1460 states and 5051 transitions. [2021-06-05 15:05:19,127 INFO L78 Accepts]: Start accepts. Automaton has 1460 states and 5051 transitions. Word has length 24 [2021-06-05 15:05:19,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:19,127 INFO L482 AbstractCegarLoop]: Abstraction has 1460 states and 5051 transitions. [2021-06-05 15:05:19,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:19,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1460 states and 5051 transitions. [2021-06-05 15:05:19,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:19,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:19,129 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:19,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 15:05:19,330 INFO L430 AbstractCegarLoop]: === Iteration 104 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:19,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:19,330 INFO L82 PathProgramCache]: Analyzing trace with hash 199702980, now seen corresponding path program 11 times [2021-06-05 15:05:19,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:19,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242806391] [2021-06-05 15:05:19,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:19,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:19,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:19,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242806391] [2021-06-05 15:05:19,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242806391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:19,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978548757] [2021-06-05 15:05:19,481 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:19,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:05:19,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:19,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:19,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:19,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:05:19,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:19,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:19,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:19,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:05:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:19,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978548757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:19,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:19,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:05:19,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439858876] [2021-06-05 15:05:19,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:05:19,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:19,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:05:19,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:05:19,676 INFO L87 Difference]: Start difference. First operand 1460 states and 5051 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:20,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:20,433 INFO L93 Difference]: Finished difference Result 2165 states and 7322 transitions. [2021-06-05 15:05:20,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:05:20,433 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:20,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:20,436 INFO L225 Difference]: With dead ends: 2165 [2021-06-05 15:05:20,436 INFO L226 Difference]: Without dead ends: 2156 [2021-06-05 15:05:20,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 613.3ms TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:05:20,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-06-05 15:05:20,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1469. [2021-06-05 15:05:20,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1469 states, 1468 states have (on average 3.459809264305177) internal successors, (5079), 1468 states have internal predecessors, (5079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:20,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 5079 transitions. [2021-06-05 15:05:20,456 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 5079 transitions. Word has length 24 [2021-06-05 15:05:20,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:20,456 INFO L482 AbstractCegarLoop]: Abstraction has 1469 states and 5079 transitions. [2021-06-05 15:05:20,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:20,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 5079 transitions. [2021-06-05 15:05:20,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:20,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:20,458 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:20,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 15:05:20,659 INFO L430 AbstractCegarLoop]: === Iteration 105 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:20,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:20,659 INFO L82 PathProgramCache]: Analyzing trace with hash 523289158, now seen corresponding path program 12 times [2021-06-05 15:05:20,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:20,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897909886] [2021-06-05 15:05:20,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:20,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:20,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897909886] [2021-06-05 15:05:20,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897909886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:20,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871843120] [2021-06-05 15:05:20,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:20,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:05:20,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:20,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:05:20,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:21,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:21,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:21,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:21,026 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:21,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 15:05:21,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:21,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:21,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:21,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-06-05 15:05:21,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:21,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871843120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:21,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:21,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:05:21,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849992212] [2021-06-05 15:05:21,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:21,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:21,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:21,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:21,176 INFO L87 Difference]: Start difference. First operand 1469 states and 5079 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:22,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:22,303 INFO L93 Difference]: Finished difference Result 2142 states and 7233 transitions. [2021-06-05 15:05:22,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:05:22,303 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:22,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:22,307 INFO L225 Difference]: With dead ends: 2142 [2021-06-05 15:05:22,308 INFO L226 Difference]: Without dead ends: 2133 [2021-06-05 15:05:22,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 900.2ms TimeCoverageRelationStatistics Valid=284, Invalid=1522, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:05:22,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2133 states. [2021-06-05 15:05:22,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2133 to 1481. [2021-06-05 15:05:22,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 3.4594594594594597) internal successors, (5120), 1480 states have internal predecessors, (5120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:22,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 5120 transitions. [2021-06-05 15:05:22,331 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 5120 transitions. Word has length 24 [2021-06-05 15:05:22,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:22,332 INFO L482 AbstractCegarLoop]: Abstraction has 1481 states and 5120 transitions. [2021-06-05 15:05:22,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:22,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 5120 transitions. [2021-06-05 15:05:22,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:22,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:22,334 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:22,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 15:05:22,534 INFO L430 AbstractCegarLoop]: === Iteration 106 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:22,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:22,535 INFO L82 PathProgramCache]: Analyzing trace with hash -2085934016, now seen corresponding path program 13 times [2021-06-05 15:05:22,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:22,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979000859] [2021-06-05 15:05:22,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:22,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:22,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979000859] [2021-06-05 15:05:22,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979000859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:22,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550959844] [2021-06-05 15:05:22,701 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:22,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:22,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:22,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:22,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:05:22,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:22,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:22,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:22,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:05:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:22,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550959844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:22,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:22,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:05:22,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184618396] [2021-06-05 15:05:22,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:05:22,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:22,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:05:22,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:05:22,910 INFO L87 Difference]: Start difference. First operand 1481 states and 5120 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:23,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:23,719 INFO L93 Difference]: Finished difference Result 2094 states and 7096 transitions. [2021-06-05 15:05:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:05:23,719 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:23,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:23,722 INFO L225 Difference]: With dead ends: 2094 [2021-06-05 15:05:23,723 INFO L226 Difference]: Without dead ends: 2083 [2021-06-05 15:05:23,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 572.5ms TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:05:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-06-05 15:05:23,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1473. [2021-06-05 15:05:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 3.4619565217391304) internal successors, (5096), 1472 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:23,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 5096 transitions. [2021-06-05 15:05:23,746 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 5096 transitions. Word has length 24 [2021-06-05 15:05:23,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:23,746 INFO L482 AbstractCegarLoop]: Abstraction has 1473 states and 5096 transitions. [2021-06-05 15:05:23,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:23,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 5096 transitions. [2021-06-05 15:05:23,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:23,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:23,748 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:23,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:23,949 INFO L430 AbstractCegarLoop]: === Iteration 107 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:23,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:23,949 INFO L82 PathProgramCache]: Analyzing trace with hash 721304348, now seen corresponding path program 59 times [2021-06-05 15:05:23,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:23,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533240319] [2021-06-05 15:05:23,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:23,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:24,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:24,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533240319] [2021-06-05 15:05:24,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533240319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:24,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838050766] [2021-06-05 15:05:24,151 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:24,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:05:24,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:24,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:24,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:24,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:24,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:24,365 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:24,366 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:24,366 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:05:24,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:24,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838050766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:24,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:24,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:05:24,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148473885] [2021-06-05 15:05:24,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:24,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:24,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:24,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:24,402 INFO L87 Difference]: Start difference. First operand 1473 states and 5096 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:26,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:26,398 INFO L93 Difference]: Finished difference Result 2359 states and 7859 transitions. [2021-06-05 15:05:26,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:05:26,398 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:26,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:26,402 INFO L225 Difference]: With dead ends: 2359 [2021-06-05 15:05:26,402 INFO L226 Difference]: Without dead ends: 2317 [2021-06-05 15:05:26,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1498.4ms TimeCoverageRelationStatistics Valid=405, Invalid=2675, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:05:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2021-06-05 15:05:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 1490. [2021-06-05 15:05:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1490 states, 1489 states have (on average 3.455339153794493) internal successors, (5145), 1489 states have internal predecessors, (5145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:26,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 5145 transitions. [2021-06-05 15:05:26,422 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 5145 transitions. Word has length 24 [2021-06-05 15:05:26,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:26,422 INFO L482 AbstractCegarLoop]: Abstraction has 1490 states and 5145 transitions. [2021-06-05 15:05:26,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:26,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 5145 transitions. [2021-06-05 15:05:26,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:26,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:26,424 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:26,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:26,625 INFO L430 AbstractCegarLoop]: === Iteration 108 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:26,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:26,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1985601830, now seen corresponding path program 60 times [2021-06-05 15:05:26,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:26,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580674154] [2021-06-05 15:05:26,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:26,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:26,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580674154] [2021-06-05 15:05:26,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580674154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:26,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524055603] [2021-06-05 15:05:26,804 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:26,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:05:26,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:26,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:26,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:27,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:27,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:27,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:27,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 40 [2021-06-05 15:05:27,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:05:27,111 INFO L628 ElimStorePlain]: treesize reduction 31, result has 44.6 percent of original size [2021-06-05 15:05:27,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:27,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-06-05 15:05:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:27,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524055603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:27,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:27,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:05:27,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342512547] [2021-06-05 15:05:27,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:05:27,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:27,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:05:27,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:05:27,193 INFO L87 Difference]: Start difference. First operand 1490 states and 5145 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:28,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:28,612 INFO L93 Difference]: Finished difference Result 2233 states and 7485 transitions. [2021-06-05 15:05:28,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:05:28,613 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:28,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:28,625 INFO L225 Difference]: With dead ends: 2233 [2021-06-05 15:05:28,625 INFO L226 Difference]: Without dead ends: 2187 [2021-06-05 15:05:28,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1050.5ms TimeCoverageRelationStatistics Valid=237, Invalid=1743, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:05:28,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2187 states. [2021-06-05 15:05:28,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2187 to 1495. [2021-06-05 15:05:28,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 3.4558232931726907) internal successors, (5163), 1494 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 15:05:28,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 5163 transitions. [2021-06-05 15:05:28,645 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 5163 transitions. Word has length 24 [2021-06-05 15:05:28,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:28,645 INFO L482 AbstractCegarLoop]: Abstraction has 1495 states and 5163 transitions. [2021-06-05 15:05:28,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 5163 transitions. [2021-06-05 15:05:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:28,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:28,647 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:28,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2021-06-05 15:05:28,848 INFO L430 AbstractCegarLoop]: === Iteration 109 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:28,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:28,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1809060398, now seen corresponding path program 61 times [2021-06-05 15:05:28,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:28,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845945358] [2021-06-05 15:05:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:29,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:29,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845945358] [2021-06-05 15:05:29,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845945358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:29,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884617375] [2021-06-05 15:05:29,051 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:29,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:29,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:29,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:29,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:05:29,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:29,243 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:29,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:29,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:05:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:29,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884617375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:29,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:29,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:05:29,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335834211] [2021-06-05 15:05:29,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:05:29,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:29,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:05:29,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:05:29,303 INFO L87 Difference]: Start difference. First operand 1495 states and 5163 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:30,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:30,542 INFO L93 Difference]: Finished difference Result 2155 states and 7270 transitions. [2021-06-05 15:05:30,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:05:30,542 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:30,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:30,545 INFO L225 Difference]: With dead ends: 2155 [2021-06-05 15:05:30,545 INFO L226 Difference]: Without dead ends: 2125 [2021-06-05 15:05:30,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1092.8ms TimeCoverageRelationStatistics Valid=336, Invalid=1920, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:05:30,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2125 states. [2021-06-05 15:05:30,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2125 to 1497. [2021-06-05 15:05:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 3.4558823529411766) internal successors, (5170), 1496 states have internal predecessors, (5170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:30,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 5170 transitions. [2021-06-05 15:05:30,563 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 5170 transitions. Word has length 24 [2021-06-05 15:05:30,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:30,563 INFO L482 AbstractCegarLoop]: Abstraction has 1497 states and 5170 transitions. [2021-06-05 15:05:30,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:30,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 5170 transitions. [2021-06-05 15:05:30,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:30,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:30,565 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:30,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 15:05:30,766 INFO L430 AbstractCegarLoop]: === Iteration 110 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:30,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:30,766 INFO L82 PathProgramCache]: Analyzing trace with hash 975321958, now seen corresponding path program 62 times [2021-06-05 15:05:30,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:30,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490857716] [2021-06-05 15:05:30,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:30,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:30,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490857716] [2021-06-05 15:05:30,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490857716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:30,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313024483] [2021-06-05 15:05:30,939 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:30,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:30,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:30,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:05:30,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:31,099 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:31,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:05:31,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:31,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:31,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:31,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:05:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:31,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313024483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:31,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:31,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:05:31,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320054071] [2021-06-05 15:05:31,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:31,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:31,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:31,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:31,208 INFO L87 Difference]: Start difference. First operand 1497 states and 5170 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:32,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:32,651 INFO L93 Difference]: Finished difference Result 2128 states and 7174 transitions. [2021-06-05 15:05:32,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:05:32,652 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:32,655 INFO L225 Difference]: With dead ends: 2128 [2021-06-05 15:05:32,655 INFO L226 Difference]: Without dead ends: 2097 [2021-06-05 15:05:32,655 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 1091.9ms TimeCoverageRelationStatistics Valid=297, Invalid=2055, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:05:32,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2021-06-05 15:05:32,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1499. [2021-06-05 15:05:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.4539385847797064) internal successors, (5174), 1498 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:32,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 5174 transitions. [2021-06-05 15:05:32,676 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 5174 transitions. Word has length 24 [2021-06-05 15:05:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:32,677 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 5174 transitions. [2021-06-05 15:05:32,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:32,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 5174 transitions. [2021-06-05 15:05:32,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:32,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:32,679 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:32,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:32,889 INFO L430 AbstractCegarLoop]: === Iteration 111 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:32,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:32,889 INFO L82 PathProgramCache]: Analyzing trace with hash -846298030, now seen corresponding path program 14 times [2021-06-05 15:05:32,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:32,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302293079] [2021-06-05 15:05:32,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:32,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:33,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:33,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302293079] [2021-06-05 15:05:33,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302293079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:33,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352626347] [2021-06-05 15:05:33,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:33,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:33,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:33,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:05:33,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:33,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:33,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:05:33,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:33,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:33,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:33,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:33,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:05:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:33,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352626347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:33,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:33,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:05:33,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395355462] [2021-06-05 15:05:33,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:33,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:33,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:33,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:33,387 INFO L87 Difference]: Start difference. First operand 1499 states and 5174 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:34,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:34,969 INFO L93 Difference]: Finished difference Result 2335 states and 7758 transitions. [2021-06-05 15:05:34,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:05:34,969 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:34,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:34,973 INFO L225 Difference]: With dead ends: 2335 [2021-06-05 15:05:34,973 INFO L226 Difference]: Without dead ends: 2285 [2021-06-05 15:05:34,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1267.8ms TimeCoverageRelationStatistics Valid=381, Invalid=2589, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:05:34,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2021-06-05 15:05:34,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 1503. [2021-06-05 15:05:34,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 3.454727030625832) internal successors, (5189), 1502 states have internal predecessors, (5189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:34,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 5189 transitions. [2021-06-05 15:05:34,992 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 5189 transitions. Word has length 24 [2021-06-05 15:05:34,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:34,993 INFO L482 AbstractCegarLoop]: Abstraction has 1503 states and 5189 transitions. [2021-06-05 15:05:34,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:34,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 5189 transitions. [2021-06-05 15:05:34,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:34,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:34,994 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:35,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 15:05:35,195 INFO L430 AbstractCegarLoop]: === Iteration 112 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:35,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:35,195 INFO L82 PathProgramCache]: Analyzing trace with hash 882373716, now seen corresponding path program 15 times [2021-06-05 15:05:35,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:35,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670874760] [2021-06-05 15:05:35,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:35,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:35,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670874760] [2021-06-05 15:05:35,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670874760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:35,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909656074] [2021-06-05 15:05:35,407 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:35,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:05:35,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:35,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:05:35,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:35,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:35,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:05:35,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:35,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:35,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:35,642 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:05:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:35,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909656074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:35,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:35,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:05:35,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20349175] [2021-06-05 15:05:35,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:35,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:35,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:35,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:35,715 INFO L87 Difference]: Start difference. First operand 1503 states and 5189 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:36,003 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-06-05 15:05:38,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:38,365 INFO L93 Difference]: Finished difference Result 2316 states and 7730 transitions. [2021-06-05 15:05:38,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:05:38,365 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:38,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:38,368 INFO L225 Difference]: With dead ends: 2316 [2021-06-05 15:05:38,369 INFO L226 Difference]: Without dead ends: 2277 [2021-06-05 15:05:38,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 2190.1ms TimeCoverageRelationStatistics Valid=572, Invalid=3588, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:05:38,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-06-05 15:05:38,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1507. [2021-06-05 15:05:38,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 3.455511288180611) internal successors, (5204), 1506 states have internal predecessors, (5204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:38,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 5204 transitions. [2021-06-05 15:05:38,390 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 5204 transitions. Word has length 24 [2021-06-05 15:05:38,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:38,390 INFO L482 AbstractCegarLoop]: Abstraction has 1507 states and 5204 transitions. [2021-06-05 15:05:38,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:38,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 5204 transitions. [2021-06-05 15:05:38,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:38,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:38,392 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:38,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:38,593 INFO L430 AbstractCegarLoop]: === Iteration 113 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:38,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:38,593 INFO L82 PathProgramCache]: Analyzing trace with hash -145776144, now seen corresponding path program 16 times [2021-06-05 15:05:38,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:38,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817839802] [2021-06-05 15:05:38,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:38,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:38,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817839802] [2021-06-05 15:05:38,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817839802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:38,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386261667] [2021-06-05 15:05:38,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:38,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:38,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:38,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:38,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:38,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:05:38,948 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:38,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:38,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:38,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:05:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:39,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386261667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:39,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:39,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:05:39,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013800860] [2021-06-05 15:05:39,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:05:39,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:39,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:05:39,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:05:39,001 INFO L87 Difference]: Start difference. First operand 1507 states and 5204 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:40,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:40,250 INFO L93 Difference]: Finished difference Result 2152 states and 7265 transitions. [2021-06-05 15:05:40,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:05:40,251 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:40,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:40,254 INFO L225 Difference]: With dead ends: 2152 [2021-06-05 15:05:40,254 INFO L226 Difference]: Without dead ends: 2126 [2021-06-05 15:05:40,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1026.5ms TimeCoverageRelationStatistics Valid=350, Invalid=2002, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:05:40,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2126 states. [2021-06-05 15:05:40,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2126 to 1510. [2021-06-05 15:05:40,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 3.453943008614977) internal successors, (5212), 1509 states have internal predecessors, (5212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:40,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 5212 transitions. [2021-06-05 15:05:40,273 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 5212 transitions. Word has length 24 [2021-06-05 15:05:40,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:40,273 INFO L482 AbstractCegarLoop]: Abstraction has 1510 states and 5212 transitions. [2021-06-05 15:05:40,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:40,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 5212 transitions. [2021-06-05 15:05:40,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:40,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:40,275 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:40,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:40,476 INFO L430 AbstractCegarLoop]: === Iteration 114 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:40,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:40,476 INFO L82 PathProgramCache]: Analyzing trace with hash 177810034, now seen corresponding path program 17 times [2021-06-05 15:05:40,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:40,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437067370] [2021-06-05 15:05:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:40,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:40,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437067370] [2021-06-05 15:05:40,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437067370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:40,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866294121] [2021-06-05 15:05:40,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:40,681 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:40,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:40,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:40,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:40,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:05:40,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:40,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:40,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:40,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:05:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:40,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866294121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:40,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:40,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:05:40,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419902029] [2021-06-05 15:05:40,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:05:40,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:40,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:05:40,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:05:40,855 INFO L87 Difference]: Start difference. First operand 1510 states and 5212 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:41,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:41,915 INFO L93 Difference]: Finished difference Result 2129 states and 7196 transitions. [2021-06-05 15:05:41,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:05:41,915 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:41,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:41,919 INFO L225 Difference]: With dead ends: 2129 [2021-06-05 15:05:41,919 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 15:05:41,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 870.7ms TimeCoverageRelationStatistics Valid=255, Invalid=1551, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:05:41,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 15:05:41,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1507. [2021-06-05 15:05:41,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 3.454183266932271) internal successors, (5202), 1506 states have internal predecessors, (5202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 5202 transitions. [2021-06-05 15:05:41,939 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 5202 transitions. Word has length 24 [2021-06-05 15:05:41,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:41,939 INFO L482 AbstractCegarLoop]: Abstraction has 1507 states and 5202 transitions. [2021-06-05 15:05:41,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:41,939 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 5202 transitions. [2021-06-05 15:05:41,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:41,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:41,941 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:42,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:42,145 INFO L430 AbstractCegarLoop]: === Iteration 115 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:42,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:42,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1468982144, now seen corresponding path program 63 times [2021-06-05 15:05:42,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:42,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800353887] [2021-06-05 15:05:42,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:42,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:42,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:42,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:42,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800353887] [2021-06-05 15:05:42,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800353887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:42,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469378822] [2021-06-05 15:05:42,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:42,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:05:42,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:42,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:42,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:42,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:42,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:42,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:42,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:42,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:05:42,576 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:42,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469378822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:42,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:42,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:05:42,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564360589] [2021-06-05 15:05:42,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:42,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:42,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:42,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:42,577 INFO L87 Difference]: Start difference. First operand 1507 states and 5202 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:45,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:45,020 INFO L93 Difference]: Finished difference Result 2395 states and 7988 transitions. [2021-06-05 15:05:45,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 15:05:45,021 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:45,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:45,024 INFO L225 Difference]: With dead ends: 2395 [2021-06-05 15:05:45,024 INFO L226 Difference]: Without dead ends: 2353 [2021-06-05 15:05:45,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 1950.8ms TimeCoverageRelationStatistics Valid=583, Invalid=3973, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:05:45,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-06-05 15:05:45,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1512. [2021-06-05 15:05:45,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.452680344142952) internal successors, (5217), 1511 states have internal predecessors, (5217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:45,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5217 transitions. [2021-06-05 15:05:45,044 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5217 transitions. Word has length 24 [2021-06-05 15:05:45,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:45,044 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5217 transitions. [2021-06-05 15:05:45,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:45,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5217 transitions. [2021-06-05 15:05:45,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:45,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:45,046 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:45,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 15:05:45,246 INFO L430 AbstractCegarLoop]: === Iteration 116 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:45,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:45,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1686407030, now seen corresponding path program 64 times [2021-06-05 15:05:45,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:45,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714113592] [2021-06-05 15:05:45,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:45,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:45,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:45,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714113592] [2021-06-05 15:05:45,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714113592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:45,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531839525] [2021-06-05 15:05:45,455 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:45,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:45,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:45,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:45,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:45,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:05:45,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:45,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:45,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:45,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:05:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:45,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531839525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:45,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:45,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:05:45,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600704663] [2021-06-05 15:05:45,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:05:45,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:45,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:05:45,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:05:45,699 INFO L87 Difference]: Start difference. First operand 1512 states and 5217 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:47,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:47,370 INFO L93 Difference]: Finished difference Result 2231 states and 7499 transitions. [2021-06-05 15:05:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:05:47,371 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:47,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:47,374 INFO L225 Difference]: With dead ends: 2231 [2021-06-05 15:05:47,374 INFO L226 Difference]: Without dead ends: 2201 [2021-06-05 15:05:47,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1509.3ms TimeCoverageRelationStatistics Valid=477, Invalid=2829, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 15:05:47,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-06-05 15:05:47,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1514. [2021-06-05 15:05:47,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1514 states, 1513 states have (on average 3.4527428949107732) internal successors, (5224), 1513 states have internal predecessors, (5224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 5224 transitions. [2021-06-05 15:05:47,392 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 5224 transitions. Word has length 24 [2021-06-05 15:05:47,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:47,392 INFO L482 AbstractCegarLoop]: Abstraction has 1514 states and 5224 transitions. [2021-06-05 15:05:47,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:47,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 5224 transitions. [2021-06-05 15:05:47,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:47,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:47,394 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:47,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 15:05:47,595 INFO L430 AbstractCegarLoop]: === Iteration 117 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:47,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:47,595 INFO L82 PathProgramCache]: Analyzing trace with hash 852668590, now seen corresponding path program 65 times [2021-06-05 15:05:47,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:47,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217356541] [2021-06-05 15:05:47,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:47,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:47,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:47,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217356541] [2021-06-05 15:05:47,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217356541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:47,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975340539] [2021-06-05 15:05:47,764 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:47,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:05:47,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:47,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:47,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:47,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:47,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:05:47,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:05:47,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 15:05:47,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:47,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:47,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:47,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:29, output treesize:7 [2021-06-05 15:05:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:48,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975340539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:48,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:48,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:05:48,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802745053] [2021-06-05 15:05:48,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:48,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:48,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:48,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:48,039 INFO L87 Difference]: Start difference. First operand 1514 states and 5224 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:50,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:50,317 INFO L93 Difference]: Finished difference Result 2184 states and 7332 transitions. [2021-06-05 15:05:50,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 15:05:50,318 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:50,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:50,321 INFO L225 Difference]: With dead ends: 2184 [2021-06-05 15:05:50,322 INFO L226 Difference]: Without dead ends: 2150 [2021-06-05 15:05:50,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 1897.6ms TimeCoverageRelationStatistics Valid=513, Invalid=3777, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:05:50,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-06-05 15:05:50,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1509. [2021-06-05 15:05:50,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1508 states have (on average 3.453580901856764) internal successors, (5208), 1508 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:50,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 5208 transitions. [2021-06-05 15:05:50,343 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 5208 transitions. Word has length 24 [2021-06-05 15:05:50,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:50,343 INFO L482 AbstractCegarLoop]: Abstraction has 1509 states and 5208 transitions. [2021-06-05 15:05:50,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:50,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 5208 transitions. [2021-06-05 15:05:50,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:50,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:50,345 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:50,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:50,546 INFO L430 AbstractCegarLoop]: === Iteration 118 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:50,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:50,546 INFO L82 PathProgramCache]: Analyzing trace with hash 2111150986, now seen corresponding path program 18 times [2021-06-05 15:05:50,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:50,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559129063] [2021-06-05 15:05:50,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:50,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:50,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:50,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559129063] [2021-06-05 15:05:50,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559129063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:50,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382164385] [2021-06-05 15:05:50,777 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:50,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:05:50,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:50,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:05:50,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:51,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:51,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:05:51,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:05:51,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:51,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:51,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:51,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:05:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:51,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382164385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:51,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:51,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:05:51,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138336094] [2021-06-05 15:05:51,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:05:51,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:51,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:05:51,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:05:51,130 INFO L87 Difference]: Start difference. First operand 1509 states and 5208 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:53,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:53,573 INFO L93 Difference]: Finished difference Result 2330 states and 7756 transitions. [2021-06-05 15:05:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 15:05:53,574 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:53,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:53,577 INFO L225 Difference]: With dead ends: 2330 [2021-06-05 15:05:53,577 INFO L226 Difference]: Without dead ends: 2272 [2021-06-05 15:05:53,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 1976.7ms TimeCoverageRelationStatistics Valid=553, Invalid=3479, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:05:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-06-05 15:05:53,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1512. [2021-06-05 15:05:53,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1512 states, 1511 states have (on average 3.4533421575115817) internal successors, (5218), 1511 states have internal predecessors, (5218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:53,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 5218 transitions. [2021-06-05 15:05:53,597 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 5218 transitions. Word has length 24 [2021-06-05 15:05:53,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:53,597 INFO L482 AbstractCegarLoop]: Abstraction has 1512 states and 5218 transitions. [2021-06-05 15:05:53,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:53,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 5218 transitions. [2021-06-05 15:05:53,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:53,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:53,599 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:53,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:53,799 INFO L430 AbstractCegarLoop]: === Iteration 119 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:53,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:53,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1083001126, now seen corresponding path program 19 times [2021-06-05 15:05:53,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:53,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242234241] [2021-06-05 15:05:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:53,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:53,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242234241] [2021-06-05 15:05:53,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242234241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:53,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732864590] [2021-06-05 15:05:53,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:54,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:54,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:54,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:05:54,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:54,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:54,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:54,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:05:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:54,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732864590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:54,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:54,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:05:54,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486784046] [2021-06-05 15:05:54,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:05:54,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:54,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:05:54,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:05:54,192 INFO L87 Difference]: Start difference. First operand 1512 states and 5218 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:55,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:55,831 INFO L93 Difference]: Finished difference Result 2195 states and 7393 transitions. [2021-06-05 15:05:55,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:05:55,831 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:55,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:55,834 INFO L225 Difference]: With dead ends: 2195 [2021-06-05 15:05:55,834 INFO L226 Difference]: Without dead ends: 2169 [2021-06-05 15:05:55,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1335.4ms TimeCoverageRelationStatistics Valid=418, Invalid=2234, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:05:55,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-06-05 15:05:55,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1515. [2021-06-05 15:05:55,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1515 states, 1514 states have (on average 3.451783355350066) internal successors, (5226), 1514 states have internal predecessors, (5226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:55,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1515 states to 1515 states and 5226 transitions. [2021-06-05 15:05:55,853 INFO L78 Accepts]: Start accepts. Automaton has 1515 states and 5226 transitions. Word has length 24 [2021-06-05 15:05:55,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:55,853 INFO L482 AbstractCegarLoop]: Abstraction has 1515 states and 5226 transitions. [2021-06-05 15:05:55,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:55,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1515 states and 5226 transitions. [2021-06-05 15:05:55,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:55,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:55,855 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:56,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:56,055 INFO L430 AbstractCegarLoop]: === Iteration 120 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:56,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:56,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1406587304, now seen corresponding path program 20 times [2021-06-05 15:05:56,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:56,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3783690] [2021-06-05 15:05:56,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:56,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:56,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:56,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3783690] [2021-06-05 15:05:56,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3783690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:56,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169902148] [2021-06-05 15:05:56,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:56,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:56,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:56,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:05:56,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:56,366 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:56,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:05:56,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:56,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:56,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:56,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:05:56,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:56,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169902148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:56,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:56,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:05:56,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292424029] [2021-06-05 15:05:56,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:05:56,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:56,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:05:56,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:05:56,471 INFO L87 Difference]: Start difference. First operand 1515 states and 5226 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:58,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:58,897 INFO L93 Difference]: Finished difference Result 2274 states and 7562 transitions. [2021-06-05 15:05:58,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:05:58,897 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:05:58,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:58,900 INFO L225 Difference]: With dead ends: 2274 [2021-06-05 15:05:58,900 INFO L226 Difference]: Without dead ends: 2243 [2021-06-05 15:05:58,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1354 ImplicationChecksByTransitivity, 1985.4ms TimeCoverageRelationStatistics Valid=590, Invalid=3570, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:05:58,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2243 states. [2021-06-05 15:05:58,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2243 to 1527. [2021-06-05 15:05:58,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 3.450851900393185) internal successors, (5266), 1526 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:58,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 5266 transitions. [2021-06-05 15:05:58,921 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 5266 transitions. Word has length 24 [2021-06-05 15:05:58,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:58,921 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 5266 transitions. [2021-06-05 15:05:58,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:58,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 5266 transitions. [2021-06-05 15:05:58,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:05:58,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:58,923 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:59,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:59,128 INFO L430 AbstractCegarLoop]: === Iteration 121 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:05:59,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:59,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1202635870, now seen corresponding path program 21 times [2021-06-05 15:05:59,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:59,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876307126] [2021-06-05 15:05:59,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:59,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:59,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876307126] [2021-06-05 15:05:59,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876307126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:59,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123351710] [2021-06-05 15:05:59,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:59,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:05:59,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:59,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:59,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:59,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:05:59,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:59,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:59,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:59,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:05:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:59,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123351710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:59,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:59,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:05:59,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039719902] [2021-06-05 15:05:59,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:05:59,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:59,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:05:59,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:05:59,479 INFO L87 Difference]: Start difference. First operand 1527 states and 5266 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:00,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:00,944 INFO L93 Difference]: Finished difference Result 2109 states and 7137 transitions. [2021-06-05 15:06:00,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:06:00,944 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:00,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:00,949 INFO L225 Difference]: With dead ends: 2109 [2021-06-05 15:06:00,949 INFO L226 Difference]: Without dead ends: 2092 [2021-06-05 15:06:00,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1186.1ms TimeCoverageRelationStatistics Valid=359, Invalid=2091, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:06:00,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-06-05 15:06:00,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1518. [2021-06-05 15:06:00,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.4535266974291363) internal successors, (5239), 1517 states have internal predecessors, (5239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:00,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5239 transitions. [2021-06-05 15:06:00,969 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5239 transitions. Word has length 24 [2021-06-05 15:06:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:00,969 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 5239 transitions. [2021-06-05 15:06:00,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:00,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5239 transitions. [2021-06-05 15:06:00,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:00,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:00,971 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:01,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:01,172 INFO L430 AbstractCegarLoop]: === Iteration 122 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:01,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:01,172 INFO L82 PathProgramCache]: Analyzing trace with hash -743658084, now seen corresponding path program 66 times [2021-06-05 15:06:01,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:01,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238141506] [2021-06-05 15:06:01,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:01,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:01,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238141506] [2021-06-05 15:06:01,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238141506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:01,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97100904] [2021-06-05 15:06:01,330 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 15:06:01,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:06:01,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:01,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:06:01,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:01,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:01,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:06:01,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:01,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:01,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:01,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:06:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:01,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97100904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:01,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:01,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:06:01,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543352072] [2021-06-05 15:06:01,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:01,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:01,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:01,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:01,576 INFO L87 Difference]: Start difference. First operand 1518 states and 5239 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:04,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:04,383 INFO L93 Difference]: Finished difference Result 2778 states and 9114 transitions. [2021-06-05 15:06:04,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 15:06:04,384 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:04,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:04,388 INFO L225 Difference]: With dead ends: 2778 [2021-06-05 15:06:04,388 INFO L226 Difference]: Without dead ends: 2741 [2021-06-05 15:06:04,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 2303.2ms TimeCoverageRelationStatistics Valid=924, Invalid=6048, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 15:06:04,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2741 states. [2021-06-05 15:06:04,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2741 to 1535. [2021-06-05 15:06:04,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1534 states have (on average 3.4615384615384617) internal successors, (5310), 1534 states have internal predecessors, (5310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:04,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 5310 transitions. [2021-06-05 15:06:04,412 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 5310 transitions. Word has length 24 [2021-06-05 15:06:04,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:04,412 INFO L482 AbstractCegarLoop]: Abstraction has 1535 states and 5310 transitions. [2021-06-05 15:06:04,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:04,412 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 5310 transitions. [2021-06-05 15:06:04,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:04,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:04,414 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:04,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:04,621 INFO L430 AbstractCegarLoop]: === Iteration 123 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:04,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:04,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1760448038, now seen corresponding path program 67 times [2021-06-05 15:06:04,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:04,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506085326] [2021-06-05 15:06:04,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:04,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:04,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506085326] [2021-06-05 15:06:04,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506085326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:04,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630313067] [2021-06-05 15:06:04,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:04,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:04,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:04,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:04,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:06:04,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:04,930 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:04,930 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:04,930 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:06:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:04,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630313067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:04,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:04,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:06:04,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993927928] [2021-06-05 15:06:04,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:06:04,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:04,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:06:04,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:06:04,978 INFO L87 Difference]: Start difference. First operand 1535 states and 5310 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:07,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:07,369 INFO L93 Difference]: Finished difference Result 2830 states and 9291 transitions. [2021-06-05 15:06:07,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 15:06:07,369 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:07,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:07,373 INFO L225 Difference]: With dead ends: 2830 [2021-06-05 15:06:07,373 INFO L226 Difference]: Without dead ends: 2787 [2021-06-05 15:06:07,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 2005.0ms TimeCoverageRelationStatistics Valid=868, Invalid=5294, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:06:07,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2787 states. [2021-06-05 15:06:07,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2787 to 1554. [2021-06-05 15:06:07,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1554 states, 1553 states have (on average 3.4745653573728266) internal successors, (5396), 1553 states have internal predecessors, (5396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1554 states to 1554 states and 5396 transitions. [2021-06-05 15:06:07,397 INFO L78 Accepts]: Start accepts. Automaton has 1554 states and 5396 transitions. Word has length 24 [2021-06-05 15:06:07,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:07,397 INFO L482 AbstractCegarLoop]: Abstraction has 1554 states and 5396 transitions. [2021-06-05 15:06:07,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:07,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1554 states and 5396 transitions. [2021-06-05 15:06:07,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:07,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:07,399 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:07,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 15:06:07,600 INFO L430 AbstractCegarLoop]: === Iteration 124 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:07,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:07,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1493814354, now seen corresponding path program 22 times [2021-06-05 15:06:07,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:07,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800689323] [2021-06-05 15:06:07,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:07,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:07,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:07,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800689323] [2021-06-05 15:06:07,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800689323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:07,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318534891] [2021-06-05 15:06:07,788 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:07,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:07,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:07,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:07,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:07,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:06:07,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:07,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:07,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:07,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:06:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:07,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318534891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:07,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:07,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:06:07,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642886402] [2021-06-05 15:06:07,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:06:07,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:07,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:06:07,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:06:07,983 INFO L87 Difference]: Start difference. First operand 1554 states and 5396 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:10,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:10,320 INFO L93 Difference]: Finished difference Result 2881 states and 9430 transitions. [2021-06-05 15:06:10,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 15:06:10,321 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:10,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:10,325 INFO L225 Difference]: With dead ends: 2881 [2021-06-05 15:06:10,325 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 15:06:10,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 2045.8ms TimeCoverageRelationStatistics Valid=911, Invalid=5095, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:06:10,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 15:06:10,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1582. [2021-06-05 15:06:10,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1581 states have (on average 3.4927261227071473) internal successors, (5522), 1581 states have internal predecessors, (5522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:10,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 5522 transitions. [2021-06-05 15:06:10,357 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 5522 transitions. Word has length 24 [2021-06-05 15:06:10,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:10,357 INFO L482 AbstractCegarLoop]: Abstraction has 1582 states and 5522 transitions. [2021-06-05 15:06:10,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:10,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 5522 transitions. [2021-06-05 15:06:10,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:10,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:10,360 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:10,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 15:06:10,569 INFO L430 AbstractCegarLoop]: === Iteration 125 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:10,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:10,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1817400532, now seen corresponding path program 23 times [2021-06-05 15:06:10,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:10,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52556643] [2021-06-05 15:06:10,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:10,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:10,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52556643] [2021-06-05 15:06:10,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52556643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:10,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620014583] [2021-06-05 15:06:10,731 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:10,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:06:10,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:10,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:10,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:10,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:06:10,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:10,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:10,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:10,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:06:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:10,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620014583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:10,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:10,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:06:10,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994671227] [2021-06-05 15:06:10,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:06:10,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:10,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:06:10,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:06:10,922 INFO L87 Difference]: Start difference. First operand 1582 states and 5522 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:13,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:13,176 INFO L93 Difference]: Finished difference Result 2726 states and 9045 transitions. [2021-06-05 15:06:13,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 15:06:13,176 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:13,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:13,180 INFO L225 Difference]: With dead ends: 2726 [2021-06-05 15:06:13,180 INFO L226 Difference]: Without dead ends: 2706 [2021-06-05 15:06:13,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1946 ImplicationChecksByTransitivity, 1870.7ms TimeCoverageRelationStatistics Valid=828, Invalid=4722, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:06:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2706 states. [2021-06-05 15:06:13,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2706 to 1576. [2021-06-05 15:06:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.493333333333333) internal successors, (5502), 1575 states have internal predecessors, (5502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:13,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5502 transitions. [2021-06-05 15:06:13,203 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5502 transitions. Word has length 24 [2021-06-05 15:06:13,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:13,204 INFO L482 AbstractCegarLoop]: Abstraction has 1576 states and 5502 transitions. [2021-06-05 15:06:13,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:13,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5502 transitions. [2021-06-05 15:06:13,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:13,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:13,206 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:13,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:13,421 INFO L430 AbstractCegarLoop]: === Iteration 126 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:13,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:13,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1940644096, now seen corresponding path program 68 times [2021-06-05 15:06:13,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:13,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596299768] [2021-06-05 15:06:13,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:13,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:13,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:13,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596299768] [2021-06-05 15:06:13,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596299768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:13,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105242652] [2021-06-05 15:06:13,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:13,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:13,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:13,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:06:13,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:13,742 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:13,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:06:13,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:13,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:13,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:13,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:06:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:13,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105242652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:13,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:13,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:06:13,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789409025] [2021-06-05 15:06:13,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:13,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:13,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:13,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:13,824 INFO L87 Difference]: Start difference. First operand 1576 states and 5502 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:16,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:16,970 INFO L93 Difference]: Finished difference Result 2803 states and 9390 transitions. [2021-06-05 15:06:16,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 15:06:16,970 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:16,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:16,974 INFO L225 Difference]: With dead ends: 2803 [2021-06-05 15:06:16,975 INFO L226 Difference]: Without dead ends: 2781 [2021-06-05 15:06:16,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 2690.7ms TimeCoverageRelationStatistics Valid=988, Invalid=6322, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 15:06:16,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2781 states. [2021-06-05 15:06:16,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2781 to 1592. [2021-06-05 15:06:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1592 states, 1591 states have (on average 3.508485229415462) internal successors, (5582), 1591 states have internal predecessors, (5582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1592 states to 1592 states and 5582 transitions. [2021-06-05 15:06:17,004 INFO L78 Accepts]: Start accepts. Automaton has 1592 states and 5582 transitions. Word has length 24 [2021-06-05 15:06:17,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:17,005 INFO L482 AbstractCegarLoop]: Abstraction has 1592 states and 5582 transitions. [2021-06-05 15:06:17,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:17,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1592 states and 5582 transitions. [2021-06-05 15:06:17,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:17,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:17,007 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:17,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:17,211 INFO L430 AbstractCegarLoop]: === Iteration 127 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:17,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2145562230, now seen corresponding path program 24 times [2021-06-05 15:06:17,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:17,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847389813] [2021-06-05 15:06:17,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:17,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:17,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:17,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847389813] [2021-06-05 15:06:17,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847389813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:17,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597638050] [2021-06-05 15:06:17,399 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:17,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:06:17,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:17,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:06:17,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:17,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:17,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:06:17,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:17,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:17,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:17,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 15:06:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:17,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597638050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:17,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:17,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:06:17,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125033105] [2021-06-05 15:06:17,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:17,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:17,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:17,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:17,664 INFO L87 Difference]: Start difference. First operand 1592 states and 5582 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:20,785 INFO L93 Difference]: Finished difference Result 2820 states and 9359 transitions. [2021-06-05 15:06:20,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 15:06:20,786 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:20,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:20,790 INFO L225 Difference]: With dead ends: 2820 [2021-06-05 15:06:20,790 INFO L226 Difference]: Without dead ends: 2800 [2021-06-05 15:06:20,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2682 ImplicationChecksByTransitivity, 2799.5ms TimeCoverageRelationStatistics Valid=1088, Invalid=6222, Unknown=0, NotChecked=0, Total=7310 [2021-06-05 15:06:20,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2800 states. [2021-06-05 15:06:20,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2800 to 1593. [2021-06-05 15:06:20,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.5069095477386933) internal successors, (5583), 1592 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5583 transitions. [2021-06-05 15:06:20,815 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5583 transitions. Word has length 24 [2021-06-05 15:06:20,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:20,815 INFO L482 AbstractCegarLoop]: Abstraction has 1593 states and 5583 transitions. [2021-06-05 15:06:20,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:20,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5583 transitions. [2021-06-05 15:06:20,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:20,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:20,817 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:21,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-06-05 15:06:21,019 INFO L430 AbstractCegarLoop]: === Iteration 128 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:21,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:21,019 INFO L82 PathProgramCache]: Analyzing trace with hash -459818108, now seen corresponding path program 25 times [2021-06-05 15:06:21,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:21,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615835377] [2021-06-05 15:06:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:21,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:21,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:21,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615835377] [2021-06-05 15:06:21,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615835377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:21,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644244661] [2021-06-05 15:06:21,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:21,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:21,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:21,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:06:21,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:21,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:21,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:21,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:06:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:21,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644244661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:21,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:21,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:06:21,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765803347] [2021-06-05 15:06:21,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:06:21,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:21,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:06:21,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:06:21,381 INFO L87 Difference]: Start difference. First operand 1593 states and 5583 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:23,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:23,719 INFO L93 Difference]: Finished difference Result 2662 states and 8908 transitions. [2021-06-05 15:06:23,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 15:06:23,719 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:23,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:23,723 INFO L225 Difference]: With dead ends: 2662 [2021-06-05 15:06:23,723 INFO L226 Difference]: Without dead ends: 2629 [2021-06-05 15:06:23,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1872.1ms TimeCoverageRelationStatistics Valid=738, Invalid=4092, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 15:06:23,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2021-06-05 15:06:23,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 1589. [2021-06-05 15:06:23,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1589 states, 1588 states have (on average 3.5025188916876573) internal successors, (5562), 1588 states have internal predecessors, (5562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:23,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 5562 transitions. [2021-06-05 15:06:23,749 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 5562 transitions. Word has length 24 [2021-06-05 15:06:23,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:23,749 INFO L482 AbstractCegarLoop]: Abstraction has 1589 states and 5562 transitions. [2021-06-05 15:06:23,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:23,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 5562 transitions. [2021-06-05 15:06:23,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:23,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:23,752 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:23,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:23,957 INFO L430 AbstractCegarLoop]: === Iteration 129 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:23,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:23,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1985018250, now seen corresponding path program 26 times [2021-06-05 15:06:23,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:23,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203833685] [2021-06-05 15:06:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:24,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:24,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:24,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203833685] [2021-06-05 15:06:24,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203833685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:24,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038224973] [2021-06-05 15:06:24,174 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:24,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:24,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:24,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:06:24,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:24,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:24,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:24,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:06:24,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:24,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:24,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:24,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:06:24,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:24,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038224973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:24,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:24,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:06:24,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328986789] [2021-06-05 15:06:24,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:06:24,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:24,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:06:24,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:06:24,473 INFO L87 Difference]: Start difference. First operand 1589 states and 5562 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:27,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:27,161 INFO L93 Difference]: Finished difference Result 3367 states and 11408 transitions. [2021-06-05 15:06:27,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:06:27,162 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:27,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:27,167 INFO L225 Difference]: With dead ends: 3367 [2021-06-05 15:06:27,167 INFO L226 Difference]: Without dead ends: 3341 [2021-06-05 15:06:27,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 2089.2ms TimeCoverageRelationStatistics Valid=538, Invalid=4018, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:06:27,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2021-06-05 15:06:27,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 1591. [2021-06-05 15:06:27,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.5018867924528303) internal successors, (5568), 1590 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 15:06:27,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5568 transitions. [2021-06-05 15:06:27,194 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5568 transitions. Word has length 24 [2021-06-05 15:06:27,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:27,194 INFO L482 AbstractCegarLoop]: Abstraction has 1591 states and 5568 transitions. [2021-06-05 15:06:27,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5568 transitions. [2021-06-05 15:06:27,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:27,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:27,197 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:27,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:27,397 INFO L430 AbstractCegarLoop]: === Iteration 130 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:27,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1800433182, now seen corresponding path program 27 times [2021-06-05 15:06:27,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:27,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113586030] [2021-06-05 15:06:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:27,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:27,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113586030] [2021-06-05 15:06:27,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113586030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:27,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071191120] [2021-06-05 15:06:27,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:27,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:06:27,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:27,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:06:27,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:27,778 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:27,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:06:27,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:27,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:27,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:27,788 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:06:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:27,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071191120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:27,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:27,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:06:27,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693160315] [2021-06-05 15:06:27,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:06:27,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:27,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:06:27,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:06:27,859 INFO L87 Difference]: Start difference. First operand 1591 states and 5568 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:30,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:30,928 INFO L93 Difference]: Finished difference Result 2710 states and 9124 transitions. [2021-06-05 15:06:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 15:06:30,929 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:30,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:30,933 INFO L225 Difference]: With dead ends: 2710 [2021-06-05 15:06:30,933 INFO L226 Difference]: Without dead ends: 2683 [2021-06-05 15:06:30,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 2360.5ms TimeCoverageRelationStatistics Valid=744, Invalid=4368, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 15:06:30,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2683 states. [2021-06-05 15:06:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2683 to 1600. [2021-06-05 15:06:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.50281425891182) internal successors, (5601), 1599 states have internal predecessors, (5601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:30,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5601 transitions. [2021-06-05 15:06:30,956 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5601 transitions. Word has length 24 [2021-06-05 15:06:30,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:30,956 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5601 transitions. [2021-06-05 15:06:30,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:30,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5601 transitions. [2021-06-05 15:06:30,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:30,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:30,958 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:31,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 15:06:31,159 INFO L430 AbstractCegarLoop]: === Iteration 131 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:31,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:31,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1590895802, now seen corresponding path program 28 times [2021-06-05 15:06:31,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:31,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461570611] [2021-06-05 15:06:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:31,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:31,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:31,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461570611] [2021-06-05 15:06:31,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461570611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:31,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317699809] [2021-06-05 15:06:31,397 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:31,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:31,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:31,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:31,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:31,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:06:31,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:31,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:31,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:31,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:06:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:31,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317699809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:31,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:31,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:06:31,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154307247] [2021-06-05 15:06:31,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:31,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:31,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:31,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:31,626 INFO L87 Difference]: Start difference. First operand 1600 states and 5601 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:33,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:33,453 INFO L93 Difference]: Finished difference Result 2564 states and 8676 transitions. [2021-06-05 15:06:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:06:33,454 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:33,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:33,457 INFO L225 Difference]: With dead ends: 2564 [2021-06-05 15:06:33,457 INFO L226 Difference]: Without dead ends: 2535 [2021-06-05 15:06:33,458 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1533.1ms TimeCoverageRelationStatistics Valid=402, Invalid=2460, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:06:33,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2021-06-05 15:06:33,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 1605. [2021-06-05 15:06:33,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.501870324189526) internal successors, (5617), 1604 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:33,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5617 transitions. [2021-06-05 15:06:33,486 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5617 transitions. Word has length 24 [2021-06-05 15:06:33,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:33,486 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 5617 transitions. [2021-06-05 15:06:33,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:33,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5617 transitions. [2021-06-05 15:06:33,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:33,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:33,489 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:33,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 15:06:33,700 INFO L430 AbstractCegarLoop]: === Iteration 132 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:33,700 INFO L82 PathProgramCache]: Analyzing trace with hash -975399748, now seen corresponding path program 29 times [2021-06-05 15:06:33,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:33,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519655821] [2021-06-05 15:06:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:33,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:33,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519655821] [2021-06-05 15:06:33,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519655821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:33,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718627994] [2021-06-05 15:06:33,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:33,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:06:33,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:33,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:33,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:34,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:06:34,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:34,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:34,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:34,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:06:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:34,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718627994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:34,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:34,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:06:34,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664966554] [2021-06-05 15:06:34,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:34,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:34,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:34,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:34,165 INFO L87 Difference]: Start difference. First operand 1605 states and 5617 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:35,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:35,796 INFO L93 Difference]: Finished difference Result 2491 states and 8452 transitions. [2021-06-05 15:06:35,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:06:35,797 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:35,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:35,800 INFO L225 Difference]: With dead ends: 2491 [2021-06-05 15:06:35,800 INFO L226 Difference]: Without dead ends: 2462 [2021-06-05 15:06:35,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1448.0ms TimeCoverageRelationStatistics Valid=402, Invalid=2354, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:06:35,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2462 states. [2021-06-05 15:06:35,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2462 to 1598. [2021-06-05 15:06:35,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 3.504696305572949) internal successors, (5597), 1597 states have internal predecessors, (5597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 5597 transitions. [2021-06-05 15:06:35,822 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 5597 transitions. Word has length 24 [2021-06-05 15:06:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:35,822 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 5597 transitions. [2021-06-05 15:06:35,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:35,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 5597 transitions. [2021-06-05 15:06:35,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:35,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:35,824 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:36,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:36,025 INFO L430 AbstractCegarLoop]: === Iteration 133 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:36,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:36,025 INFO L82 PathProgramCache]: Analyzing trace with hash -2003549608, now seen corresponding path program 30 times [2021-06-05 15:06:36,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:36,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524332959] [2021-06-05 15:06:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:36,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:36,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524332959] [2021-06-05 15:06:36,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524332959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:36,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454873619] [2021-06-05 15:06:36,193 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:36,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:06:36,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:36,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:36,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:36,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:36,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:36,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:36,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 39 [2021-06-05 15:06:36,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:36,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:36,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:36,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:36 [2021-06-05 15:06:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:36,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454873619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:36,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:36,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:06:36,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950492694] [2021-06-05 15:06:36,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:06:36,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:36,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:06:36,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:06:36,489 INFO L87 Difference]: Start difference. First operand 1598 states and 5597 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:38,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:38,310 INFO L93 Difference]: Finished difference Result 2374 states and 8085 transitions. [2021-06-05 15:06:38,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:06:38,311 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:38,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:38,314 INFO L225 Difference]: With dead ends: 2374 [2021-06-05 15:06:38,314 INFO L226 Difference]: Without dead ends: 2357 [2021-06-05 15:06:38,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 1596.6ms TimeCoverageRelationStatistics Valid=625, Invalid=3035, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:06:38,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2021-06-05 15:06:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 1611. [2021-06-05 15:06:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.5012422360248445) internal successors, (5637), 1610 states have internal predecessors, (5637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5637 transitions. [2021-06-05 15:06:38,335 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5637 transitions. Word has length 24 [2021-06-05 15:06:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:38,335 INFO L482 AbstractCegarLoop]: Abstraction has 1611 states and 5637 transitions. [2021-06-05 15:06:38,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:38,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5637 transitions. [2021-06-05 15:06:38,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:38,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:38,337 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:38,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 15:06:38,538 INFO L430 AbstractCegarLoop]: === Iteration 134 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:38,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:38,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1679963430, now seen corresponding path program 31 times [2021-06-05 15:06:38,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:38,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350115807] [2021-06-05 15:06:38,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:38,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:38,701 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:38,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:38,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350115807] [2021-06-05 15:06:38,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350115807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:38,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100665496] [2021-06-05 15:06:38,702 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:38,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:38,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:38,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:06:38,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:38,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:38,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:38,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:06:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:38,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100665496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:38,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:38,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:06:38,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970989750] [2021-06-05 15:06:38,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:06:38,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:38,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:06:38,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:06:38,919 INFO L87 Difference]: Start difference. First operand 1611 states and 5637 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:40,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:40,051 INFO L93 Difference]: Finished difference Result 2307 states and 7914 transitions. [2021-06-05 15:06:40,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:06:40,052 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:40,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:40,055 INFO L225 Difference]: With dead ends: 2307 [2021-06-05 15:06:40,055 INFO L226 Difference]: Without dead ends: 2296 [2021-06-05 15:06:40,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 944.4ms TimeCoverageRelationStatistics Valid=262, Invalid=1460, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:06:40,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-06-05 15:06:40,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1596. [2021-06-05 15:06:40,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 3.5040752351097177) internal successors, (5589), 1595 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 5589 transitions. [2021-06-05 15:06:40,077 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 5589 transitions. Word has length 24 [2021-06-05 15:06:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:40,077 INFO L482 AbstractCegarLoop]: Abstraction has 1596 states and 5589 transitions. [2021-06-05 15:06:40,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 5589 transitions. [2021-06-05 15:06:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:40,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:40,079 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:40,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:40,279 INFO L430 AbstractCegarLoop]: === Iteration 135 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:40,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:40,280 INFO L82 PathProgramCache]: Analyzing trace with hash 772236998, now seen corresponding path program 32 times [2021-06-05 15:06:40,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:40,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666822692] [2021-06-05 15:06:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:40,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:40,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666822692] [2021-06-05 15:06:40,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666822692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:40,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128070154] [2021-06-05 15:06:40,472 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:40,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:40,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:40,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:06:40,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:40,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:40,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:40,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:06:40,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:40,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:40,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:40,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:06:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:40,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128070154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:40,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:40,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:06:40,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718021970] [2021-06-05 15:06:40,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:06:40,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:40,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:06:40,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:06:40,747 INFO L87 Difference]: Start difference. First operand 1596 states and 5589 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:43,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:43,499 INFO L93 Difference]: Finished difference Result 3315 states and 11270 transitions. [2021-06-05 15:06:43,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:06:43,500 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:43,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:43,504 INFO L225 Difference]: With dead ends: 3315 [2021-06-05 15:06:43,504 INFO L226 Difference]: Without dead ends: 3296 [2021-06-05 15:06:43,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 2310.1ms TimeCoverageRelationStatistics Valid=585, Invalid=4107, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:06:43,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2021-06-05 15:06:43,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 1596. [2021-06-05 15:06:43,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 3.5040752351097177) internal successors, (5589), 1595 states have internal predecessors, (5589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 5589 transitions. [2021-06-05 15:06:43,553 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 5589 transitions. Word has length 24 [2021-06-05 15:06:43,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:43,553 INFO L482 AbstractCegarLoop]: Abstraction has 1596 states and 5589 transitions. [2021-06-05 15:06:43,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:43,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 5589 transitions. [2021-06-05 15:06:43,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:43,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:43,555 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:43,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:43,755 INFO L430 AbstractCegarLoop]: === Iteration 136 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:43,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:43,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1068711792, now seen corresponding path program 33 times [2021-06-05 15:06:43,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:43,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121806752] [2021-06-05 15:06:43,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:43,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:43,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121806752] [2021-06-05 15:06:43,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121806752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:43,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390704546] [2021-06-05 15:06:43,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:43,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:06:43,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:43,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:06:43,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:44,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:44,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:06:44,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:44,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:44,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:44,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:06:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:44,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390704546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:44,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:44,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:06:44,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841110242] [2021-06-05 15:06:44,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:06:44,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:44,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:06:44,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:06:44,234 INFO L87 Difference]: Start difference. First operand 1596 states and 5589 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:45,625 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2021-06-05 15:06:47,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:47,421 INFO L93 Difference]: Finished difference Result 2689 states and 9043 transitions. [2021-06-05 15:06:47,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:06:47,421 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:47,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:47,426 INFO L225 Difference]: With dead ends: 2689 [2021-06-05 15:06:47,426 INFO L226 Difference]: Without dead ends: 2662 [2021-06-05 15:06:47,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 2594.5ms TimeCoverageRelationStatistics Valid=686, Invalid=4284, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 15:06:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2662 states. [2021-06-05 15:06:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2662 to 1601. [2021-06-05 15:06:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1601 states, 1600 states have (on average 3.503125) internal successors, (5605), 1600 states have internal predecessors, (5605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:47,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1601 states to 1601 states and 5605 transitions. [2021-06-05 15:06:47,468 INFO L78 Accepts]: Start accepts. Automaton has 1601 states and 5605 transitions. Word has length 24 [2021-06-05 15:06:47,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:47,468 INFO L482 AbstractCegarLoop]: Abstraction has 1601 states and 5605 transitions. [2021-06-05 15:06:47,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:47,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1601 states and 5605 transitions. [2021-06-05 15:06:47,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:47,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:47,472 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:47,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 15:06:47,694 INFO L430 AbstractCegarLoop]: === Iteration 137 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:47,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:47,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1073663896, now seen corresponding path program 34 times [2021-06-05 15:06:47,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:47,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544448759] [2021-06-05 15:06:47,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:47,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:47,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544448759] [2021-06-05 15:06:47,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544448759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:47,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203415941] [2021-06-05 15:06:47,900 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:47,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:47,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:47,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:47,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:48,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:06:48,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:48,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:48,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:48,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:06:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:48,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203415941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:48,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:48,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:06:48,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554666505] [2021-06-05 15:06:48,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:48,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:48,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:48,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:48,122 INFO L87 Difference]: Start difference. First operand 1601 states and 5605 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:49,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:49,950 INFO L93 Difference]: Finished difference Result 2578 states and 8710 transitions. [2021-06-05 15:06:49,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:06:49,950 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:49,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:49,954 INFO L225 Difference]: With dead ends: 2578 [2021-06-05 15:06:49,954 INFO L226 Difference]: Without dead ends: 2558 [2021-06-05 15:06:49,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 1443.5ms TimeCoverageRelationStatistics Valid=368, Invalid=2284, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:06:49,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2021-06-05 15:06:49,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 1604. [2021-06-05 15:06:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1603 states have (on average 3.5015595757953837) internal successors, (5613), 1603 states have internal predecessors, (5613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:49,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 5613 transitions. [2021-06-05 15:06:49,977 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 5613 transitions. Word has length 24 [2021-06-05 15:06:49,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:49,977 INFO L482 AbstractCegarLoop]: Abstraction has 1604 states and 5613 transitions. [2021-06-05 15:06:49,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:49,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 5613 transitions. [2021-06-05 15:06:49,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:49,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:49,980 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:50,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 15:06:50,189 INFO L430 AbstractCegarLoop]: === Iteration 138 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:50,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:50,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1285059888, now seen corresponding path program 35 times [2021-06-05 15:06:50,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:50,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577001079] [2021-06-05 15:06:50,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:50,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:50,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:50,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577001079] [2021-06-05 15:06:50,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577001079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:50,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264193533] [2021-06-05 15:06:50,424 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:50,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:06:50,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:50,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:50,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:50,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:06:50,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:50,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:50,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:50,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:06:50,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:50,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264193533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:50,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:50,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:06:50,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599055259] [2021-06-05 15:06:50,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:50,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:50,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:50,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:50,637 INFO L87 Difference]: Start difference. First operand 1604 states and 5613 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:52,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:52,193 INFO L93 Difference]: Finished difference Result 2511 states and 8501 transitions. [2021-06-05 15:06:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:06:52,194 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:52,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:52,197 INFO L225 Difference]: With dead ends: 2511 [2021-06-05 15:06:52,197 INFO L226 Difference]: Without dead ends: 2491 [2021-06-05 15:06:52,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1364.5ms TimeCoverageRelationStatistics Valid=363, Invalid=2187, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:06:52,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2021-06-05 15:06:52,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1600. [2021-06-05 15:06:52,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 3.5053158223889933) internal successors, (5605), 1599 states have internal predecessors, (5605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:52,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 5605 transitions. [2021-06-05 15:06:52,220 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 5605 transitions. Word has length 24 [2021-06-05 15:06:52,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:52,220 INFO L482 AbstractCegarLoop]: Abstraction has 1600 states and 5605 transitions. [2021-06-05 15:06:52,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:52,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 5605 transitions. [2021-06-05 15:06:52,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:52,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:52,222 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:52,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:52,423 INFO L430 AbstractCegarLoop]: === Iteration 139 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:52,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:52,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1461601320, now seen corresponding path program 36 times [2021-06-05 15:06:52,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:52,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624836138] [2021-06-05 15:06:52,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:52,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:52,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624836138] [2021-06-05 15:06:52,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624836138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:52,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996779459] [2021-06-05 15:06:52,596 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:52,625 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:06:52,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:52,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:52,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:52,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:06:52,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:52,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:52,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:52,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:06:52,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:52,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996779459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:52,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:52,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:06:52,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240268678] [2021-06-05 15:06:52,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:06:52,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:52,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:06:52,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:06:52,792 INFO L87 Difference]: Start difference. First operand 1600 states and 5605 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:54,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:54,430 INFO L93 Difference]: Finished difference Result 2345 states and 8015 transitions. [2021-06-05 15:06:54,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:06:54,430 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:54,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:54,434 INFO L225 Difference]: With dead ends: 2345 [2021-06-05 15:06:54,434 INFO L226 Difference]: Without dead ends: 2336 [2021-06-05 15:06:54,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1361.0ms TimeCoverageRelationStatistics Valid=386, Invalid=2266, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:06:54,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-05 15:06:54,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 1608. [2021-06-05 15:06:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 3.5003111387678905) internal successors, (5625), 1607 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:54,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5625 transitions. [2021-06-05 15:06:54,455 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5625 transitions. Word has length 24 [2021-06-05 15:06:54,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:54,455 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 5625 transitions. [2021-06-05 15:06:54,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:54,455 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5625 transitions. [2021-06-05 15:06:54,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:54,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:54,457 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:54,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-05 15:06:54,658 INFO L430 AbstractCegarLoop]: === Iteration 140 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:54,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:54,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1999627536, now seen corresponding path program 37 times [2021-06-05 15:06:54,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:54,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947167332] [2021-06-05 15:06:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:54,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:54,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947167332] [2021-06-05 15:06:54,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947167332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:54,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293110066] [2021-06-05 15:06:54,833 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:54,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:54,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:54,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:06:54,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:54,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:54,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:54,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:06:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:55,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293110066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:55,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:55,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:06:55,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707517890] [2021-06-05 15:06:55,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:06:55,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:55,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:06:55,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:06:55,041 INFO L87 Difference]: Start difference. First operand 1608 states and 5625 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:56,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:56,501 INFO L93 Difference]: Finished difference Result 2356 states and 8045 transitions. [2021-06-05 15:06:56,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:06:56,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:56,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:56,504 INFO L225 Difference]: With dead ends: 2356 [2021-06-05 15:06:56,504 INFO L226 Difference]: Without dead ends: 2346 [2021-06-05 15:06:56,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1177.1ms TimeCoverageRelationStatistics Valid=303, Invalid=1767, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:06:56,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2021-06-05 15:06:56,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 1603. [2021-06-05 15:06:56,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.5037453183520597) internal successors, (5613), 1602 states have internal predecessors, (5613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:56,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5613 transitions. [2021-06-05 15:06:56,527 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5613 transitions. Word has length 24 [2021-06-05 15:06:56,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:56,527 INFO L482 AbstractCegarLoop]: Abstraction has 1603 states and 5613 transitions. [2021-06-05 15:06:56,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:56,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5613 transitions. [2021-06-05 15:06:56,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:56,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:56,529 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:56,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-06-05 15:06:56,732 INFO L430 AbstractCegarLoop]: === Iteration 141 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:56,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:56,732 INFO L82 PathProgramCache]: Analyzing trace with hash 2121589456, now seen corresponding path program 38 times [2021-06-05 15:06:56,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:56,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738645640] [2021-06-05 15:06:56,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:56,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:56,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738645640] [2021-06-05 15:06:56,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738645640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:56,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249695885] [2021-06-05 15:06:56,958 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:56,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:56,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:56,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:06:56,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:57,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:57,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:57,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:06:57,208 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:57,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:57,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:57,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:06:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:57,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249695885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:57,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:57,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:06:57,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70413678] [2021-06-05 15:06:57,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:06:57,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:57,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:06:57,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:06:57,244 INFO L87 Difference]: Start difference. First operand 1603 states and 5613 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:58,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:58,385 INFO L93 Difference]: Finished difference Result 2139 states and 7300 transitions. [2021-06-05 15:06:58,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:06:58,386 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:06:58,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:58,389 INFO L225 Difference]: With dead ends: 2139 [2021-06-05 15:06:58,390 INFO L226 Difference]: Without dead ends: 2130 [2021-06-05 15:06:58,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 988.9ms TimeCoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:06:58,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2130 states. [2021-06-05 15:06:58,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2130 to 1605. [2021-06-05 15:06:58,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.5037406483790523) internal successors, (5620), 1604 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:58,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5620 transitions. [2021-06-05 15:06:58,414 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5620 transitions. Word has length 24 [2021-06-05 15:06:58,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:58,414 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 5620 transitions. [2021-06-05 15:06:58,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:58,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5620 transitions. [2021-06-05 15:06:58,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:06:58,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:58,416 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:58,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 15:06:58,617 INFO L430 AbstractCegarLoop]: === Iteration 142 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:06:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:58,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1912052076, now seen corresponding path program 39 times [2021-06-05 15:06:58,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:58,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416727198] [2021-06-05 15:06:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:58,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:58,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:58,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:58,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416727198] [2021-06-05 15:06:58,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416727198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:58,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322930220] [2021-06-05 15:06:58,823 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:58,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:06:58,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:58,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:58,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:58,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:06:58,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:58,999 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:58,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:58,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:06:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:59,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322930220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:59,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:59,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:06:59,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534228718] [2021-06-05 15:06:59,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:06:59,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:59,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:06:59,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:06:59,029 INFO L87 Difference]: Start difference. First operand 1605 states and 5620 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:00,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:00,337 INFO L93 Difference]: Finished difference Result 2163 states and 7368 transitions. [2021-06-05 15:07:00,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:07:00,338 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:00,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:00,341 INFO L225 Difference]: With dead ends: 2163 [2021-06-05 15:07:00,341 INFO L226 Difference]: Without dead ends: 2144 [2021-06-05 15:07:00,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1077.5ms TimeCoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:07:00,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2021-06-05 15:07:00,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1610. [2021-06-05 15:07:00,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 3.5027967681789933) internal successors, (5636), 1609 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:00,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5636 transitions. [2021-06-05 15:07:00,362 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5636 transitions. Word has length 24 [2021-06-05 15:07:00,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:00,362 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 5636 transitions. [2021-06-05 15:07:00,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:00,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5636 transitions. [2021-06-05 15:07:00,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:00,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:00,364 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:00,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:00,565 INFO L430 AbstractCegarLoop]: === Iteration 143 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:00,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:00,565 INFO L82 PathProgramCache]: Analyzing trace with hash -654243474, now seen corresponding path program 40 times [2021-06-05 15:07:00,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:00,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625173555] [2021-06-05 15:07:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:00,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:00,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625173555] [2021-06-05 15:07:00,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625173555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:00,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642336493] [2021-06-05 15:07:00,786 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:00,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:00,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:00,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:00,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:00,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:07:00,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:00,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:00,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:00,960 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:07:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:00,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642336493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:00,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:00,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:07:00,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848235964] [2021-06-05 15:07:00,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:00,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:00,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:00,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:00,989 INFO L87 Difference]: Start difference. First operand 1610 states and 5636 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:02,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:02,318 INFO L93 Difference]: Finished difference Result 2117 states and 7230 transitions. [2021-06-05 15:07:02,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:07:02,318 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:02,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:02,321 INFO L225 Difference]: With dead ends: 2117 [2021-06-05 15:07:02,321 INFO L226 Difference]: Without dead ends: 2098 [2021-06-05 15:07:02,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1046.7ms TimeCoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:07:02,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-06-05 15:07:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1607. [2021-06-05 15:07:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.5043586550435863) internal successors, (5628), 1606 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:02,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5628 transitions. [2021-06-05 15:07:02,341 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5628 transitions. Word has length 24 [2021-06-05 15:07:02,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:02,341 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5628 transitions. [2021-06-05 15:07:02,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:02,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5628 transitions. [2021-06-05 15:07:02,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:02,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:02,343 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:02,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:02,543 INFO L430 AbstractCegarLoop]: === Iteration 144 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:02,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:02,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1682393334, now seen corresponding path program 41 times [2021-06-05 15:07:02,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:02,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895440847] [2021-06-05 15:07:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:02,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:02,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895440847] [2021-06-05 15:07:02,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895440847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:02,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737698972] [2021-06-05 15:07:02,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:02,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:07:02,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:02,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:02,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:02,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:07:02,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:02,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:02,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:02,906 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:07:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:02,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737698972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:02,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:02,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:07:02,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823351878] [2021-06-05 15:07:02,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:07:02,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:02,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:07:02,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:07:02,952 INFO L87 Difference]: Start difference. First operand 1607 states and 5628 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:03,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:03,953 INFO L93 Difference]: Finished difference Result 2083 states and 7122 transitions. [2021-06-05 15:07:03,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:07:03,953 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:03,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:03,956 INFO L225 Difference]: With dead ends: 2083 [2021-06-05 15:07:03,956 INFO L226 Difference]: Without dead ends: 2074 [2021-06-05 15:07:03,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 867.1ms TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:07:03,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-06-05 15:07:03,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1616. [2021-06-05 15:07:03,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1616 states, 1615 states have (on average 3.502167182662539) internal successors, (5656), 1615 states have internal predecessors, (5656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:03,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1616 states to 1616 states and 5656 transitions. [2021-06-05 15:07:03,976 INFO L78 Accepts]: Start accepts. Automaton has 1616 states and 5656 transitions. Word has length 24 [2021-06-05 15:07:03,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:03,976 INFO L482 AbstractCegarLoop]: Abstraction has 1616 states and 5656 transitions. [2021-06-05 15:07:03,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:03,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1616 states and 5656 transitions. [2021-06-05 15:07:03,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:03,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:03,978 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:04,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2021-06-05 15:07:04,179 INFO L430 AbstractCegarLoop]: === Iteration 145 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:04,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:04,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1358807156, now seen corresponding path program 42 times [2021-06-05 15:07:04,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:04,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110127108] [2021-06-05 15:07:04,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:04,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:04,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110127108] [2021-06-05 15:07:04,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110127108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:04,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88601287] [2021-06-05 15:07:04,355 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:04,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:07:04,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:04,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:07:04,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:04,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:04,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:04,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:04,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:04,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 43 [2021-06-05 15:07:04,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:04,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:04,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:04,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:88 [2021-06-05 15:07:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:04,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88601287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:04,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:04,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:07:04,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800050622] [2021-06-05 15:07:04,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:04,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:04,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:04,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:04,704 INFO L87 Difference]: Start difference. First operand 1616 states and 5656 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:06,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:06,158 INFO L93 Difference]: Finished difference Result 2092 states and 7134 transitions. [2021-06-05 15:07:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:07:06,158 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:06,161 INFO L225 Difference]: With dead ends: 2092 [2021-06-05 15:07:06,161 INFO L226 Difference]: Without dead ends: 2083 [2021-06-05 15:07:06,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1273.7ms TimeCoverageRelationStatistics Valid=419, Invalid=1933, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:07:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2083 states. [2021-06-05 15:07:06,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2083 to 1615. [2021-06-05 15:07:06,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.502478314745973) internal successors, (5653), 1614 states have internal predecessors, (5653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:06,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 5653 transitions. [2021-06-05 15:07:06,182 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 5653 transitions. Word has length 24 [2021-06-05 15:07:06,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:06,182 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 5653 transitions. [2021-06-05 15:07:06,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:06,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 5653 transitions. [2021-06-05 15:07:06,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:06,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:06,184 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:06,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 15:07:06,385 INFO L430 AbstractCegarLoop]: === Iteration 146 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:06,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:06,385 INFO L82 PathProgramCache]: Analyzing trace with hash 326936966, now seen corresponding path program 43 times [2021-06-05 15:07:06,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:06,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28031482] [2021-06-05 15:07:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:06,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:06,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28031482] [2021-06-05 15:07:06,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28031482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:06,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891841936] [2021-06-05 15:07:06,546 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:06,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:06,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:06,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:07:06,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:06,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:06,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:06,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:07:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:06,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891841936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:06,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:06,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:07:06,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565611479] [2021-06-05 15:07:06,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:07:06,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:06,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:07:06,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:07:06,741 INFO L87 Difference]: Start difference. First operand 1615 states and 5653 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:07,668 INFO L93 Difference]: Finished difference Result 2032 states and 6957 transitions. [2021-06-05 15:07:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:07:07,668 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:07,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:07,671 INFO L225 Difference]: With dead ends: 2032 [2021-06-05 15:07:07,671 INFO L226 Difference]: Without dead ends: 2021 [2021-06-05 15:07:07,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 804.5ms TimeCoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:07:07,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states. [2021-06-05 15:07:07,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2021 to 1605. [2021-06-05 15:07:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 3.5031172069825436) internal successors, (5619), 1604 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:07,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 5619 transitions. [2021-06-05 15:07:07,693 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 5619 transitions. Word has length 24 [2021-06-05 15:07:07,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:07,693 INFO L482 AbstractCegarLoop]: Abstraction has 1605 states and 5619 transitions. [2021-06-05 15:07:07,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:07,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 5619 transitions. [2021-06-05 15:07:07,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:07,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:07,696 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:07,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:07,896 INFO L430 AbstractCegarLoop]: === Iteration 147 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:07,896 INFO L82 PathProgramCache]: Analyzing trace with hash 409417856, now seen corresponding path program 44 times [2021-06-05 15:07:07,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:07,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566181958] [2021-06-05 15:07:07,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:08,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:08,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566181958] [2021-06-05 15:07:08,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566181958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:08,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214382404] [2021-06-05 15:07:08,089 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:08,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:08,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:08,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:07:08,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:08,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:08,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:08,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:07:08,363 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:08,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:08,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:08,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:07:08,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:08,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214382404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:08,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:08,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:07:08,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918970527] [2021-06-05 15:07:08,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:08,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:08,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:08,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:08,407 INFO L87 Difference]: Start difference. First operand 1605 states and 5619 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:09,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:09,528 INFO L93 Difference]: Finished difference Result 2169 states and 7374 transitions. [2021-06-05 15:07:09,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:07:09,528 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:09,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:09,531 INFO L225 Difference]: With dead ends: 2169 [2021-06-05 15:07:09,531 INFO L226 Difference]: Without dead ends: 2160 [2021-06-05 15:07:09,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 936.1ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:07:09,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2160 states. [2021-06-05 15:07:09,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2160 to 1607. [2021-06-05 15:07:09,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1607 states, 1606 states have (on average 3.5043586550435863) internal successors, (5628), 1606 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:09,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1607 states to 1607 states and 5628 transitions. [2021-06-05 15:07:09,551 INFO L78 Accepts]: Start accepts. Automaton has 1607 states and 5628 transitions. Word has length 24 [2021-06-05 15:07:09,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:09,551 INFO L482 AbstractCegarLoop]: Abstraction has 1607 states and 5628 transitions. [2021-06-05 15:07:09,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1607 states and 5628 transitions. [2021-06-05 15:07:09,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:09,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:09,554 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:09,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-05 15:07:09,754 INFO L430 AbstractCegarLoop]: === Iteration 148 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:09,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:09,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1098664202, now seen corresponding path program 45 times [2021-06-05 15:07:09,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:09,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284819560] [2021-06-05 15:07:09,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:09,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:09,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284819560] [2021-06-05 15:07:09,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284819560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:09,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110738984] [2021-06-05 15:07:09,967 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:09,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:07:09,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:09,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:07:09,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:10,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:10,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:10,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:07:10,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:10,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:10,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:10,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:07:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:10,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110738984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:10,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:10,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:07:10,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154823383] [2021-06-05 15:07:10,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:10,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:10,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:10,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:10,239 INFO L87 Difference]: Start difference. First operand 1607 states and 5628 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:11,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:11,333 INFO L93 Difference]: Finished difference Result 2173 states and 7379 transitions. [2021-06-05 15:07:11,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:07:11,334 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:11,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:11,337 INFO L225 Difference]: With dead ends: 2173 [2021-06-05 15:07:11,337 INFO L226 Difference]: Without dead ends: 2163 [2021-06-05 15:07:11,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 924.2ms TimeCoverageRelationStatistics Valid=228, Invalid=1332, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:07:11,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2021-06-05 15:07:11,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1610. [2021-06-05 15:07:11,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1610 states, 1609 states have (on average 3.5027967681789933) internal successors, (5636), 1609 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1610 states to 1610 states and 5636 transitions. [2021-06-05 15:07:11,357 INFO L78 Accepts]: Start accepts. Automaton has 1610 states and 5636 transitions. Word has length 24 [2021-06-05 15:07:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:11,357 INFO L482 AbstractCegarLoop]: Abstraction has 1610 states and 5636 transitions. [2021-06-05 15:07:11,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1610 states and 5636 transitions. [2021-06-05 15:07:11,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:11,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:11,359 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:11,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:11,560 INFO L430 AbstractCegarLoop]: === Iteration 149 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:11,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:11,560 INFO L82 PathProgramCache]: Analyzing trace with hash 837579310, now seen corresponding path program 46 times [2021-06-05 15:07:11,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:11,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246911267] [2021-06-05 15:07:11,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:11,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:11,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:11,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:11,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246911267] [2021-06-05 15:07:11,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246911267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:11,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451737023] [2021-06-05 15:07:11,770 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:11,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:11,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:11,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:11,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:11,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:07:11,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:11,947 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:11,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:11,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:07:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:11,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451737023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:11,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:11,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:07:11,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818748045] [2021-06-05 15:07:11,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:11,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:11,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:11,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:11,977 INFO L87 Difference]: Start difference. First operand 1610 states and 5636 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:13,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:13,082 INFO L93 Difference]: Finished difference Result 2159 states and 7353 transitions. [2021-06-05 15:07:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:07:13,083 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:13,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:13,086 INFO L225 Difference]: With dead ends: 2159 [2021-06-05 15:07:13,086 INFO L226 Difference]: Without dead ends: 2149 [2021-06-05 15:07:13,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 947.3ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:07:13,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-05 15:07:13,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1608. [2021-06-05 15:07:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1607 states have (on average 3.5046670815183574) internal successors, (5632), 1607 states have internal predecessors, (5632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:13,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 5632 transitions. [2021-06-05 15:07:13,113 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 5632 transitions. Word has length 24 [2021-06-05 15:07:13,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:13,113 INFO L482 AbstractCegarLoop]: Abstraction has 1608 states and 5632 transitions. [2021-06-05 15:07:13,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:13,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 5632 transitions. [2021-06-05 15:07:13,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:13,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:13,116 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:13,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable230 [2021-06-05 15:07:13,317 INFO L430 AbstractCegarLoop]: === Iteration 150 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:13,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:13,317 INFO L82 PathProgramCache]: Analyzing trace with hash 661037878, now seen corresponding path program 47 times [2021-06-05 15:07:13,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:13,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084024765] [2021-06-05 15:07:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:13,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:13,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084024765] [2021-06-05 15:07:13,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084024765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:13,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422293590] [2021-06-05 15:07:13,491 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:13,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:07:13,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:13,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:13,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:13,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:07:13,638 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:13,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:13,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:13,641 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:07:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:13,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422293590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:13,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:13,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:07:13,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178959161] [2021-06-05 15:07:13,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:07:13,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:13,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:07:13,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:07:13,689 INFO L87 Difference]: Start difference. First operand 1608 states and 5632 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:14,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:14,880 INFO L93 Difference]: Finished difference Result 2113 states and 7205 transitions. [2021-06-05 15:07:14,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:07:14,881 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:14,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:14,884 INFO L225 Difference]: With dead ends: 2113 [2021-06-05 15:07:14,884 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 15:07:14,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 925.4ms TimeCoverageRelationStatistics Valid=270, Invalid=1452, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:07:14,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 15:07:14,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1614. [2021-06-05 15:07:14,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1613 states have (on average 3.5015499070055798) internal successors, (5648), 1613 states have internal predecessors, (5648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 5648 transitions. [2021-06-05 15:07:14,904 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 5648 transitions. Word has length 24 [2021-06-05 15:07:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:14,904 INFO L482 AbstractCegarLoop]: Abstraction has 1614 states and 5648 transitions. [2021-06-05 15:07:14,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:14,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 5648 transitions. [2021-06-05 15:07:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:14,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:14,906 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:15,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:15,107 INFO L430 AbstractCegarLoop]: === Iteration 151 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:15,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:15,107 INFO L82 PathProgramCache]: Analyzing trace with hash -172700562, now seen corresponding path program 48 times [2021-06-05 15:07:15,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:15,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104026256] [2021-06-05 15:07:15,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:15,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:15,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:15,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104026256] [2021-06-05 15:07:15,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104026256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:15,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425944566] [2021-06-05 15:07:15,282 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:15,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:07:15,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:15,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:07:15,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:15,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:15,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:07:15,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:15,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:15,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:15,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:07:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:15,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425944566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:15,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:15,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:07:15,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265981015] [2021-06-05 15:07:15,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:15,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:15,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:15,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:15,552 INFO L87 Difference]: Start difference. First operand 1614 states and 5648 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:17,059 INFO L93 Difference]: Finished difference Result 2241 states and 7546 transitions. [2021-06-05 15:07:17,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:07:17,059 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:17,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:17,062 INFO L225 Difference]: With dead ends: 2241 [2021-06-05 15:07:17,062 INFO L226 Difference]: Without dead ends: 2222 [2021-06-05 15:07:17,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1250.7ms TimeCoverageRelationStatistics Valid=348, Invalid=1722, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:07:17,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-06-05 15:07:17,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1621. [2021-06-05 15:07:17,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.504938271604938) internal successors, (5678), 1620 states have internal predecessors, (5678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:17,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5678 transitions. [2021-06-05 15:07:17,084 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5678 transitions. Word has length 24 [2021-06-05 15:07:17,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:17,084 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5678 transitions. [2021-06-05 15:07:17,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:17,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5678 transitions. [2021-06-05 15:07:17,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:17,086 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:17,086 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:17,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-06-05 15:07:17,287 INFO L430 AbstractCegarLoop]: === Iteration 152 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:17,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:17,287 INFO L82 PathProgramCache]: Analyzing trace with hash 609133238, now seen corresponding path program 49 times [2021-06-05 15:07:17,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:17,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719950872] [2021-06-05 15:07:17,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:17,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:17,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719950872] [2021-06-05 15:07:17,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719950872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:17,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642265238] [2021-06-05 15:07:17,476 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:17,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:17,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:17,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:07:17,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:17,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:17,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:17,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:07:17,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:17,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642265238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:17,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:17,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:07:17,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290010882] [2021-06-05 15:07:17,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:07:17,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:17,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:07:17,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:07:17,672 INFO L87 Difference]: Start difference. First operand 1621 states and 5678 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:18,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:18,604 INFO L93 Difference]: Finished difference Result 2080 states and 7089 transitions. [2021-06-05 15:07:18,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:07:18,604 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:18,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:18,607 INFO L225 Difference]: With dead ends: 2080 [2021-06-05 15:07:18,607 INFO L226 Difference]: Without dead ends: 2070 [2021-06-05 15:07:18,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 837.6ms TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:07:18,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-06-05 15:07:18,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1615. [2021-06-05 15:07:18,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1615 states, 1614 states have (on average 3.507434944237918) internal successors, (5661), 1614 states have internal predecessors, (5661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1615 states to 1615 states and 5661 transitions. [2021-06-05 15:07:18,640 INFO L78 Accepts]: Start accepts. Automaton has 1615 states and 5661 transitions. Word has length 24 [2021-06-05 15:07:18,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:18,641 INFO L482 AbstractCegarLoop]: Abstraction has 1615 states and 5661 transitions. [2021-06-05 15:07:18,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:18,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1615 states and 5661 transitions. [2021-06-05 15:07:18,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:18,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:18,643 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:18,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 15:07:18,843 INFO L430 AbstractCegarLoop]: === Iteration 153 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:18,844 INFO L82 PathProgramCache]: Analyzing trace with hash -451513034, now seen corresponding path program 50 times [2021-06-05 15:07:18,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:18,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405030546] [2021-06-05 15:07:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:19,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:19,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405030546] [2021-06-05 15:07:19,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405030546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:19,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502568711] [2021-06-05 15:07:19,085 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:19,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:19,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:19,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:07:19,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:19,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:19,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:19,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:19,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:19,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 15:07:19,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:07:19,370 INFO L628 ElimStorePlain]: treesize reduction 16, result has 61.0 percent of original size [2021-06-05 15:07:19,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:19,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:33 [2021-06-05 15:07:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:19,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502568711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:19,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:19,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:07:19,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677413381] [2021-06-05 15:07:19,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:07:19,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:19,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:07:19,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:07:19,459 INFO L87 Difference]: Start difference. First operand 1615 states and 5661 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:20,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:20,752 INFO L93 Difference]: Finished difference Result 2143 states and 7250 transitions. [2021-06-05 15:07:20,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:07:20,753 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:20,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:20,756 INFO L225 Difference]: With dead ends: 2143 [2021-06-05 15:07:20,756 INFO L226 Difference]: Without dead ends: 2116 [2021-06-05 15:07:20,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 1189.7ms TimeCoverageRelationStatistics Valid=268, Invalid=1712, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:07:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2021-06-05 15:07:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1621. [2021-06-05 15:07:20,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.50679012345679) internal successors, (5681), 1620 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:20,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5681 transitions. [2021-06-05 15:07:20,779 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5681 transitions. Word has length 24 [2021-06-05 15:07:20,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:20,779 INFO L482 AbstractCegarLoop]: Abstraction has 1621 states and 5681 transitions. [2021-06-05 15:07:20,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:20,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5681 transitions. [2021-06-05 15:07:20,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:20,781 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:20,782 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:20,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 15:07:20,997 INFO L430 AbstractCegarLoop]: === Iteration 154 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:20,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:20,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1277158712, now seen corresponding path program 51 times [2021-06-05 15:07:20,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:20,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563499394] [2021-06-05 15:07:20,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:21,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:21,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563499394] [2021-06-05 15:07:21,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563499394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:21,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510969654] [2021-06-05 15:07:21,212 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:21,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:07:21,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:21,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:07:21,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:21,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:21,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:07:21,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:21,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:21,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:21,410 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:07:21,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:21,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510969654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:21,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:21,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:07:21,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497472323] [2021-06-05 15:07:21,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:21,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:21,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:21,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:21,474 INFO L87 Difference]: Start difference. First operand 1621 states and 5681 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:23,351 INFO L93 Difference]: Finished difference Result 2143 states and 7279 transitions. [2021-06-05 15:07:23,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:07:23,351 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:23,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:23,354 INFO L225 Difference]: With dead ends: 2143 [2021-06-05 15:07:23,355 INFO L226 Difference]: Without dead ends: 2124 [2021-06-05 15:07:23,355 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 1571.1ms TimeCoverageRelationStatistics Valid=440, Invalid=2212, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:07:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2124 states. [2021-06-05 15:07:23,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2124 to 1623. [2021-06-05 15:07:23,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 3.5067817509247843) internal successors, (5688), 1622 states have internal predecessors, (5688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:23,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 5688 transitions. [2021-06-05 15:07:23,378 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 5688 transitions. Word has length 24 [2021-06-05 15:07:23,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:23,379 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 5688 transitions. [2021-06-05 15:07:23,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:23,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 5688 transitions. [2021-06-05 15:07:23,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:23,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:23,381 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:23,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable242 [2021-06-05 15:07:23,582 INFO L430 AbstractCegarLoop]: === Iteration 155 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:23,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:23,582 INFO L82 PathProgramCache]: Analyzing trace with hash 249008852, now seen corresponding path program 52 times [2021-06-05 15:07:23,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:23,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134154916] [2021-06-05 15:07:23,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:23,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:23,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134154916] [2021-06-05 15:07:23,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134154916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:23,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308240370] [2021-06-05 15:07:23,790 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:23,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:23,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:23,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:23,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:23,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:07:23,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:23,938 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:23,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:23,939 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:07:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:23,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308240370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:23,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:23,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:07:23,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987273805] [2021-06-05 15:07:23,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:07:23,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:23,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:07:23,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:07:23,984 INFO L87 Difference]: Start difference. First operand 1623 states and 5688 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:25,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:25,003 INFO L93 Difference]: Finished difference Result 2073 states and 7090 transitions. [2021-06-05 15:07:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:07:25,004 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:25,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:25,007 INFO L225 Difference]: With dead ends: 2073 [2021-06-05 15:07:25,007 INFO L226 Difference]: Without dead ends: 2063 [2021-06-05 15:07:25,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 886.7ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:07:25,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-06-05 15:07:25,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1632. [2021-06-05 15:07:25,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1632 states, 1631 states have (on average 3.505824647455549) internal successors, (5718), 1631 states have internal predecessors, (5718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:25,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1632 states to 1632 states and 5718 transitions. [2021-06-05 15:07:25,029 INFO L78 Accepts]: Start accepts. Automaton has 1632 states and 5718 transitions. Word has length 24 [2021-06-05 15:07:25,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:25,029 INFO L482 AbstractCegarLoop]: Abstraction has 1632 states and 5718 transitions. [2021-06-05 15:07:25,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:25,030 INFO L276 IsEmpty]: Start isEmpty. Operand 1632 states and 5718 transitions. [2021-06-05 15:07:25,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:25,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:25,032 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:25,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 15:07:25,233 INFO L430 AbstractCegarLoop]: === Iteration 156 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:25,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:25,233 INFO L82 PathProgramCache]: Analyzing trace with hash 572595030, now seen corresponding path program 53 times [2021-06-05 15:07:25,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:25,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407052237] [2021-06-05 15:07:25,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:25,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:25,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407052237] [2021-06-05 15:07:25,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407052237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:25,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928564544] [2021-06-05 15:07:25,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:25,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:25,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:25,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:25,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:25,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:07:25,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:25,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:25,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:25,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:07:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:25,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928564544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:25,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:25,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:07:25,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448154346] [2021-06-05 15:07:25,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:07:25,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:25,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:07:25,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:07:25,612 INFO L87 Difference]: Start difference. First operand 1632 states and 5718 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:26,502 INFO L93 Difference]: Finished difference Result 2042 states and 7006 transitions. [2021-06-05 15:07:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:07:26,503 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:26,506 INFO L225 Difference]: With dead ends: 2042 [2021-06-05 15:07:26,506 INFO L226 Difference]: Without dead ends: 2029 [2021-06-05 15:07:26,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 836.2ms TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:07:26,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2029 states. [2021-06-05 15:07:26,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2029 to 1624. [2021-06-05 15:07:26,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 3.507085643869378) internal successors, (5692), 1623 states have internal predecessors, (5692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 5692 transitions. [2021-06-05 15:07:26,526 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 5692 transitions. Word has length 24 [2021-06-05 15:07:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:26,526 INFO L482 AbstractCegarLoop]: Abstraction has 1624 states and 5692 transitions. [2021-06-05 15:07:26,526 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 5692 transitions. [2021-06-05 15:07:26,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:26,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:26,528 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:26,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 15:07:26,739 INFO L430 AbstractCegarLoop]: === Iteration 157 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:26,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:26,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1571465606, now seen corresponding path program 54 times [2021-06-05 15:07:26,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:26,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832596080] [2021-06-05 15:07:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:26,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:26,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:26,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832596080] [2021-06-05 15:07:26,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832596080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:26,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58192578] [2021-06-05 15:07:26,960 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:26,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:07:26,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:26,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:26,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:27,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:27,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:27,189 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:27,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 15:07:27,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:07:27,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:27,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:27,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 15:07:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:27,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58192578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:27,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:27,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:07:27,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488362989] [2021-06-05 15:07:27,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:07:27,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:27,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:07:27,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:07:27,266 INFO L87 Difference]: Start difference. First operand 1624 states and 5692 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:28,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:28,345 INFO L93 Difference]: Finished difference Result 2123 states and 7198 transitions. [2021-06-05 15:07:28,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:07:28,345 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:28,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:28,348 INFO L225 Difference]: With dead ends: 2123 [2021-06-05 15:07:28,348 INFO L226 Difference]: Without dead ends: 2104 [2021-06-05 15:07:28,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 887.7ms TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:07:28,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-06-05 15:07:28,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1630. [2021-06-05 15:07:28,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 3.5058317986494782) internal successors, (5711), 1629 states have internal predecessors, (5711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:28,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 5711 transitions. [2021-06-05 15:07:28,380 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 5711 transitions. Word has length 24 [2021-06-05 15:07:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:28,380 INFO L482 AbstractCegarLoop]: Abstraction has 1630 states and 5711 transitions. [2021-06-05 15:07:28,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 5711 transitions. [2021-06-05 15:07:28,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:28,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:28,382 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:28,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:28,582 INFO L430 AbstractCegarLoop]: === Iteration 158 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:28,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:28,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1459204208, now seen corresponding path program 55 times [2021-06-05 15:07:28,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:28,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309335302] [2021-06-05 15:07:28,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:28,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:28,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309335302] [2021-06-05 15:07:28,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309335302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:28,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011247060] [2021-06-05 15:07:28,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:28,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:28,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:28,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:07:28,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:28,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:28,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:28,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:07:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:29,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011247060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:29,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:29,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:07:29,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425750696] [2021-06-05 15:07:29,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:29,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:29,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:29,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:29,016 INFO L87 Difference]: Start difference. First operand 1630 states and 5711 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:30,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:30,232 INFO L93 Difference]: Finished difference Result 2123 states and 7240 transitions. [2021-06-05 15:07:30,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:07:30,232 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:30,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:30,235 INFO L225 Difference]: With dead ends: 2123 [2021-06-05 15:07:30,235 INFO L226 Difference]: Without dead ends: 2113 [2021-06-05 15:07:30,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 970.6ms TimeCoverageRelationStatistics Valid=258, Invalid=1464, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:07:30,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2021-06-05 15:07:30,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1629. [2021-06-05 15:07:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 3.5067567567567566) internal successors, (5709), 1628 states have internal predecessors, (5709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 5709 transitions. [2021-06-05 15:07:30,269 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 5709 transitions. Word has length 24 [2021-06-05 15:07:30,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:30,269 INFO L482 AbstractCegarLoop]: Abstraction has 1629 states and 5709 transitions. [2021-06-05 15:07:30,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:30,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 5709 transitions. [2021-06-05 15:07:30,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:30,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:30,271 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:30,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:30,472 INFO L430 AbstractCegarLoop]: === Iteration 159 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:30,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:30,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1635745640, now seen corresponding path program 56 times [2021-06-05 15:07:30,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:30,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929096810] [2021-06-05 15:07:30,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:30,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:30,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929096810] [2021-06-05 15:07:30,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929096810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:30,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459992229] [2021-06-05 15:07:30,676 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:30,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:30,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:30,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:07:30,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:30,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:30,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:07:30,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:30,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:30,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:30,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:07:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:30,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459992229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:30,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:30,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:07:30,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828469453] [2021-06-05 15:07:30,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:30,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:30,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:30,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:30,936 INFO L87 Difference]: Start difference. First operand 1629 states and 5709 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:32,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:32,727 INFO L93 Difference]: Finished difference Result 2214 states and 7495 transitions. [2021-06-05 15:07:32,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:07:32,728 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:32,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:32,731 INFO L225 Difference]: With dead ends: 2214 [2021-06-05 15:07:32,731 INFO L226 Difference]: Without dead ends: 2195 [2021-06-05 15:07:32,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1515.7ms TimeCoverageRelationStatistics Valid=493, Invalid=2369, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:07:32,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2195 states. [2021-06-05 15:07:32,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2195 to 1638. [2021-06-05 15:07:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 3.5070250458155163) internal successors, (5741), 1637 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 15:07:32,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 5741 transitions. [2021-06-05 15:07:32,751 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 5741 transitions. Word has length 24 [2021-06-05 15:07:32,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:32,752 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 5741 transitions. [2021-06-05 15:07:32,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:32,752 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 5741 transitions. [2021-06-05 15:07:32,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:32,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:32,754 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:32,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:32,954 INFO L430 AbstractCegarLoop]: === Iteration 160 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:32,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:32,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1825483216, now seen corresponding path program 57 times [2021-06-05 15:07:32,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:32,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127300619] [2021-06-05 15:07:32,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:33,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:33,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:33,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127300619] [2021-06-05 15:07:33,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127300619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:33,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540019396] [2021-06-05 15:07:33,152 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:33,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:07:33,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:33,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:33,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:33,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:07:33,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:33,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:33,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:33,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:07:33,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:33,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540019396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:33,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:33,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:07:33,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690224883] [2021-06-05 15:07:33,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:07:33,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:33,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:07:33,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:07:33,352 INFO L87 Difference]: Start difference. First operand 1638 states and 5741 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:34,344 INFO L93 Difference]: Finished difference Result 2105 states and 7183 transitions. [2021-06-05 15:07:34,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:07:34,344 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:34,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:34,347 INFO L225 Difference]: With dead ends: 2105 [2021-06-05 15:07:34,347 INFO L226 Difference]: Without dead ends: 2095 [2021-06-05 15:07:34,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 860.0ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:07:34,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-06-05 15:07:34,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1636. [2021-06-05 15:07:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1636 states, 1635 states have (on average 3.507645259938838) internal successors, (5735), 1635 states have internal predecessors, (5735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1636 states to 1636 states and 5735 transitions. [2021-06-05 15:07:34,368 INFO L78 Accepts]: Start accepts. Automaton has 1636 states and 5735 transitions. Word has length 24 [2021-06-05 15:07:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:34,368 INFO L482 AbstractCegarLoop]: Abstraction has 1636 states and 5735 transitions. [2021-06-05 15:07:34,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 1636 states and 5735 transitions. [2021-06-05 15:07:34,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:34,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:34,370 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:34,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 15:07:34,571 INFO L430 AbstractCegarLoop]: === Iteration 161 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:34,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:34,571 INFO L82 PathProgramCache]: Analyzing trace with hash 224079120, now seen corresponding path program 58 times [2021-06-05 15:07:34,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:34,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868576407] [2021-06-05 15:07:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:34,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:34,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868576407] [2021-06-05 15:07:34,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868576407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:34,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485352507] [2021-06-05 15:07:34,793 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:34,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:34,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:34,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:34,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:34,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:07:34,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:34,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:34,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:34,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:07:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:35,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485352507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:35,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:35,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:07:35,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536457076] [2021-06-05 15:07:35,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:35,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:35,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:35,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:35,022 INFO L87 Difference]: Start difference. First operand 1636 states and 5735 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:36,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:36,272 INFO L93 Difference]: Finished difference Result 2128 states and 7250 transitions. [2021-06-05 15:07:36,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:07:36,272 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:36,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:36,275 INFO L225 Difference]: With dead ends: 2128 [2021-06-05 15:07:36,275 INFO L226 Difference]: Without dead ends: 2109 [2021-06-05 15:07:36,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 943.1ms TimeCoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:07:36,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2109 states. [2021-06-05 15:07:36,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2109 to 1643. [2021-06-05 15:07:36,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 3.509744214372716) internal successors, (5763), 1642 states have internal predecessors, (5763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 5763 transitions. [2021-06-05 15:07:36,296 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 5763 transitions. Word has length 24 [2021-06-05 15:07:36,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:36,296 INFO L482 AbstractCegarLoop]: Abstraction has 1643 states and 5763 transitions. [2021-06-05 15:07:36,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:36,296 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 5763 transitions. [2021-06-05 15:07:36,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:36,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:36,298 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:36,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 15:07:36,499 INFO L430 AbstractCegarLoop]: === Iteration 162 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:36,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:36,499 INFO L82 PathProgramCache]: Analyzing trace with hash -804070740, now seen corresponding path program 59 times [2021-06-05 15:07:36,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:36,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419264518] [2021-06-05 15:07:36,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:36,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:36,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:36,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419264518] [2021-06-05 15:07:36,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419264518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:36,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873323075] [2021-06-05 15:07:36,725 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:36,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:36,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:36,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:36,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:36,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:07:36,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:36,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:36,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:36,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:07:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:36,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873323075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:36,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:36,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:07:36,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120957595] [2021-06-05 15:07:36,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:07:36,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:36,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:07:36,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:07:36,918 INFO L87 Difference]: Start difference. First operand 1643 states and 5763 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:37,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:37,771 INFO L93 Difference]: Finished difference Result 2129 states and 7275 transitions. [2021-06-05 15:07:37,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:07:37,771 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:37,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:37,774 INFO L225 Difference]: With dead ends: 2129 [2021-06-05 15:07:37,774 INFO L226 Difference]: Without dead ends: 2119 [2021-06-05 15:07:37,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 810.9ms TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:07:37,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-06-05 15:07:37,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1651. [2021-06-05 15:07:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.5090909090909093) internal successors, (5790), 1650 states have internal predecessors, (5790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5790 transitions. [2021-06-05 15:07:37,796 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5790 transitions. Word has length 24 [2021-06-05 15:07:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:37,796 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5790 transitions. [2021-06-05 15:07:37,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:37,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5790 transitions. [2021-06-05 15:07:37,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:37,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:37,798 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:37,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 15:07:37,998 INFO L430 AbstractCegarLoop]: === Iteration 163 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:37,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:37,999 INFO L82 PathProgramCache]: Analyzing trace with hash -480484562, now seen corresponding path program 60 times [2021-06-05 15:07:37,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:37,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487751412] [2021-06-05 15:07:37,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:38,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:38,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:38,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487751412] [2021-06-05 15:07:38,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487751412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:38,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234159999] [2021-06-05 15:07:38,174 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:38,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:07:38,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:38,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:07:38,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:38,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:38,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:07:38,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:38,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:38,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:38,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:07:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:38,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234159999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:38,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:38,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:07:38,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547229940] [2021-06-05 15:07:38,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:38,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:38,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:38,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:38,446 INFO L87 Difference]: Start difference. First operand 1651 states and 5790 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:39,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:39,592 INFO L93 Difference]: Finished difference Result 2134 states and 7234 transitions. [2021-06-05 15:07:39,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:07:39,592 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:39,595 INFO L225 Difference]: With dead ends: 2134 [2021-06-05 15:07:39,595 INFO L226 Difference]: Without dead ends: 2115 [2021-06-05 15:07:39,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 979.0ms TimeCoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:07:39,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2115 states. [2021-06-05 15:07:39,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2115 to 1650. [2021-06-05 15:07:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1649 states have (on average 3.5106124924196482) internal successors, (5789), 1649 states have internal predecessors, (5789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:39,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 5789 transitions. [2021-06-05 15:07:39,617 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 5789 transitions. Word has length 24 [2021-06-05 15:07:39,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:39,617 INFO L482 AbstractCegarLoop]: Abstraction has 1650 states and 5789 transitions. [2021-06-05 15:07:39,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:39,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 5789 transitions. [2021-06-05 15:07:39,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:39,619 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:39,619 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:39,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-06-05 15:07:39,820 INFO L430 AbstractCegarLoop]: === Iteration 164 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:39,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:39,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1205259560, now seen corresponding path program 61 times [2021-06-05 15:07:39,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:39,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579227701] [2021-06-05 15:07:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:39,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:39,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:39,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579227701] [2021-06-05 15:07:39,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579227701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:39,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031549974] [2021-06-05 15:07:39,991 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:40,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:40,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:40,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:07:40,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:40,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:40,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:40,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:07:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:40,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031549974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:40,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:40,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:07:40,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973904933] [2021-06-05 15:07:40,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:07:40,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:40,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:07:40,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:07:40,195 INFO L87 Difference]: Start difference. First operand 1650 states and 5789 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:41,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:41,020 INFO L93 Difference]: Finished difference Result 2040 states and 6997 transitions. [2021-06-05 15:07:41,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:07:41,020 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:41,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:41,023 INFO L225 Difference]: With dead ends: 2040 [2021-06-05 15:07:41,023 INFO L226 Difference]: Without dead ends: 2027 [2021-06-05 15:07:41,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 700.2ms TimeCoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:07:41,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-06-05 15:07:41,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1645. [2021-06-05 15:07:41,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 3.5097323600973236) internal successors, (5770), 1644 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:41,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 5770 transitions. [2021-06-05 15:07:41,043 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 5770 transitions. Word has length 24 [2021-06-05 15:07:41,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:41,044 INFO L482 AbstractCegarLoop]: Abstraction has 1645 states and 5770 transitions. [2021-06-05 15:07:41,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:41,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 5770 transitions. [2021-06-05 15:07:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:41,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:41,046 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:41,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:41,246 INFO L430 AbstractCegarLoop]: === Iteration 165 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:41,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:41,247 INFO L82 PathProgramCache]: Analyzing trace with hash 843525824, now seen corresponding path program 62 times [2021-06-05 15:07:41,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:41,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912001111] [2021-06-05 15:07:41,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:41,467 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:41,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912001111] [2021-06-05 15:07:41,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912001111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:41,467 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914099564] [2021-06-05 15:07:41,467 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:41,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:41,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:41,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:07:41,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:41,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:41,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:41,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-06-05 15:07:41,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:41,686 INFO L628 ElimStorePlain]: treesize reduction 3, result has 85.0 percent of original size [2021-06-05 15:07:41,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:41,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:17 [2021-06-05 15:07:41,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:41,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914099564] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:41,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:41,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:07:41,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978542503] [2021-06-05 15:07:41,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:07:41,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:41,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:07:41,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:07:41,738 INFO L87 Difference]: Start difference. First operand 1645 states and 5770 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:42,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:42,461 INFO L93 Difference]: Finished difference Result 2123 states and 7208 transitions. [2021-06-05 15:07:42,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:07:42,461 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:42,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:42,465 INFO L225 Difference]: With dead ends: 2123 [2021-06-05 15:07:42,465 INFO L226 Difference]: Without dead ends: 2071 [2021-06-05 15:07:42,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 585.7ms TimeCoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:07:42,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-05 15:07:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1648. [2021-06-05 15:07:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1648 states, 1647 states have (on average 3.5088038858530664) internal successors, (5779), 1647 states have internal predecessors, (5779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1648 states to 1648 states and 5779 transitions. [2021-06-05 15:07:42,486 INFO L78 Accepts]: Start accepts. Automaton has 1648 states and 5779 transitions. Word has length 24 [2021-06-05 15:07:42,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:42,486 INFO L482 AbstractCegarLoop]: Abstraction has 1648 states and 5779 transitions. [2021-06-05 15:07:42,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:42,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1648 states and 5779 transitions. [2021-06-05 15:07:42,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:42,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:42,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:42,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:42,689 INFO L430 AbstractCegarLoop]: === Iteration 166 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:42,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:42,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1060950710, now seen corresponding path program 63 times [2021-06-05 15:07:42,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:42,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770965456] [2021-06-05 15:07:42,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:42,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:42,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:42,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770965456] [2021-06-05 15:07:42,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770965456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:42,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310057508] [2021-06-05 15:07:42,897 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:42,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:07:42,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:42,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:07:42,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:43,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:43,125 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:43,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:43,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:43,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:43,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 15:07:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:43,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310057508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:43,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:43,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:07:43,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830063654] [2021-06-05 15:07:43,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:43,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:43,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:43,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:43,380 INFO L87 Difference]: Start difference. First operand 1648 states and 5779 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:44,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:44,500 INFO L93 Difference]: Finished difference Result 2110 states and 7189 transitions. [2021-06-05 15:07:44,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:07:44,500 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:44,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:44,503 INFO L225 Difference]: With dead ends: 2110 [2021-06-05 15:07:44,503 INFO L226 Difference]: Without dead ends: 2091 [2021-06-05 15:07:44,503 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1109.2ms TimeCoverageRelationStatistics Valid=269, Invalid=1537, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:07:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2091 states. [2021-06-05 15:07:44,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2091 to 1651. [2021-06-05 15:07:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 3.5090909090909093) internal successors, (5790), 1650 states have internal predecessors, (5790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:44,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 5790 transitions. [2021-06-05 15:07:44,524 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 5790 transitions. Word has length 24 [2021-06-05 15:07:44,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:44,524 INFO L482 AbstractCegarLoop]: Abstraction has 1651 states and 5790 transitions. [2021-06-05 15:07:44,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:44,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 5790 transitions. [2021-06-05 15:07:44,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:44,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:44,526 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:44,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:44,726 INFO L430 AbstractCegarLoop]: === Iteration 167 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:44,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:44,727 INFO L82 PathProgramCache]: Analyzing trace with hash 227212270, now seen corresponding path program 64 times [2021-06-05 15:07:44,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:44,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799880806] [2021-06-05 15:07:44,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:44,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:44,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799880806] [2021-06-05 15:07:44,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799880806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:44,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668500009] [2021-06-05 15:07:44,946 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:44,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:44,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:44,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:44,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:45,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:07:45,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:45,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:45,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:45,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:07:45,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:45,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668500009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:45,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:45,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:07:45,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698394931] [2021-06-05 15:07:45,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:07:45,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:45,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:07:45,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:07:45,141 INFO L87 Difference]: Start difference. First operand 1651 states and 5790 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:46,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:46,094 INFO L93 Difference]: Finished difference Result 2132 states and 7279 transitions. [2021-06-05 15:07:46,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:07:46,094 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:46,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:46,097 INFO L225 Difference]: With dead ends: 2132 [2021-06-05 15:07:46,097 INFO L226 Difference]: Without dead ends: 2119 [2021-06-05 15:07:46,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 849.8ms TimeCoverageRelationStatistics Valid=248, Invalid=1312, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:07:46,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-06-05 15:07:46,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1649. [2021-06-05 15:07:46,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1649 states, 1648 states have (on average 3.5097087378640777) internal successors, (5784), 1648 states have internal predecessors, (5784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 5784 transitions. [2021-06-05 15:07:46,119 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 5784 transitions. Word has length 24 [2021-06-05 15:07:46,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:46,119 INFO L482 AbstractCegarLoop]: Abstraction has 1649 states and 5784 transitions. [2021-06-05 15:07:46,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:46,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 5784 transitions. [2021-06-05 15:07:46,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:46,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:46,121 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:46,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:46,322 INFO L430 AbstractCegarLoop]: === Iteration 168 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:46,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:46,322 INFO L82 PathProgramCache]: Analyzing trace with hash -605413130, now seen corresponding path program 65 times [2021-06-05 15:07:46,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:46,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304555120] [2021-06-05 15:07:46,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:46,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:46,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:46,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304555120] [2021-06-05 15:07:46,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304555120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:46,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193544333] [2021-06-05 15:07:46,513 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:46,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:07:46,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:46,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:46,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:46,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:07:46,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:46,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:46,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:46,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:07:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:46,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193544333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:46,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:46,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:07:46,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090111256] [2021-06-05 15:07:46,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:07:46,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:46,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:07:46,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:07:46,715 INFO L87 Difference]: Start difference. First operand 1649 states and 5784 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:47,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:47,703 INFO L93 Difference]: Finished difference Result 2060 states and 7057 transitions. [2021-06-05 15:07:47,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:07:47,703 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:47,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:47,706 INFO L225 Difference]: With dead ends: 2060 [2021-06-05 15:07:47,707 INFO L226 Difference]: Without dead ends: 2051 [2021-06-05 15:07:47,707 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 801.7ms TimeCoverageRelationStatistics Valid=248, Invalid=1234, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:07:47,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-06-05 15:07:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1653. [2021-06-05 15:07:47,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 3.5090799031476996) internal successors, (5797), 1652 states have internal predecessors, (5797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 5797 transitions. [2021-06-05 15:07:47,730 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 5797 transitions. Word has length 24 [2021-06-05 15:07:47,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:47,731 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 5797 transitions. [2021-06-05 15:07:47,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:47,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 5797 transitions. [2021-06-05 15:07:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:47,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:47,733 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:47,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:47,933 INFO L430 AbstractCegarLoop]: === Iteration 169 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:47,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:47,934 INFO L82 PathProgramCache]: Analyzing trace with hash -281826952, now seen corresponding path program 66 times [2021-06-05 15:07:47,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:47,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480932066] [2021-06-05 15:07:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:47,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:48,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:48,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480932066] [2021-06-05 15:07:48,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480932066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:48,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563459747] [2021-06-05 15:07:48,115 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:48,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:07:48,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:48,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:07:48,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:48,259 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:48,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:07:48,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:48,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:48,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:48,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:07:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:48,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563459747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:48,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:48,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:07:48,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085618346] [2021-06-05 15:07:48,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:48,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:48,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:48,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:48,395 INFO L87 Difference]: Start difference. First operand 1653 states and 5797 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:49,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:49,647 INFO L93 Difference]: Finished difference Result 2157 states and 7303 transitions. [2021-06-05 15:07:49,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:07:49,647 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:49,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:49,650 INFO L225 Difference]: With dead ends: 2157 [2021-06-05 15:07:49,650 INFO L226 Difference]: Without dead ends: 2138 [2021-06-05 15:07:49,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 1159.6ms TimeCoverageRelationStatistics Valid=365, Invalid=1615, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:07:49,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-06-05 15:07:49,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1657. [2021-06-05 15:07:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 3.510265700483092) internal successors, (5813), 1656 states have internal predecessors, (5813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:49,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 5813 transitions. [2021-06-05 15:07:49,672 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 5813 transitions. Word has length 24 [2021-06-05 15:07:49,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:49,672 INFO L482 AbstractCegarLoop]: Abstraction has 1657 states and 5813 transitions. [2021-06-05 15:07:49,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:49,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 5813 transitions. [2021-06-05 15:07:49,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:49,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:49,674 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:49,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:49,875 INFO L430 AbstractCegarLoop]: === Iteration 170 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:49,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1403917170, now seen corresponding path program 67 times [2021-06-05 15:07:49,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:49,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165386188] [2021-06-05 15:07:49,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:50,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:50,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165386188] [2021-06-05 15:07:50,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165386188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:50,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227132886] [2021-06-05 15:07:50,072 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:50,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:50,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:50,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:07:50,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:50,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:50,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:50,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:07:50,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:50,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227132886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:50,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:50,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:07:50,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534287946] [2021-06-05 15:07:50,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:07:50,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:50,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:07:50,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:07:50,294 INFO L87 Difference]: Start difference. First operand 1657 states and 5813 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:51,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:51,190 INFO L93 Difference]: Finished difference Result 2022 states and 6937 transitions. [2021-06-05 15:07:51,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:07:51,190 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:51,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:51,193 INFO L225 Difference]: With dead ends: 2022 [2021-06-05 15:07:51,193 INFO L226 Difference]: Without dead ends: 2011 [2021-06-05 15:07:51,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 772.1ms TimeCoverageRelationStatistics Valid=193, Invalid=997, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:07:51,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2011 states. [2021-06-05 15:07:51,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2011 to 1656. [2021-06-05 15:07:51,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.5099697885196375) internal successors, (5809), 1655 states have internal predecessors, (5809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:51,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 5809 transitions. [2021-06-05 15:07:51,214 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 5809 transitions. Word has length 24 [2021-06-05 15:07:51,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:51,214 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 5809 transitions. [2021-06-05 15:07:51,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:51,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 5809 transitions. [2021-06-05 15:07:51,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:51,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:51,216 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:51,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-05 15:07:51,417 INFO L430 AbstractCegarLoop]: === Iteration 171 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:51,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:51,417 INFO L82 PathProgramCache]: Analyzing trace with hash -308336314, now seen corresponding path program 68 times [2021-06-05 15:07:51,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:51,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723272010] [2021-06-05 15:07:51,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:51,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:51,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723272010] [2021-06-05 15:07:51,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723272010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:51,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247655025] [2021-06-05 15:07:51,576 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:51,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:51,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:51,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:51,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:51,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:07:51,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:51,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:51,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:51,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:07:51,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:51,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247655025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:51,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:51,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:07:51,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572849446] [2021-06-05 15:07:51,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:07:51,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:51,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:07:51,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:07:51,774 INFO L87 Difference]: Start difference. First operand 1656 states and 5809 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:52,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:52,767 INFO L93 Difference]: Finished difference Result 2080 states and 7118 transitions. [2021-06-05 15:07:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:07:52,767 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:52,770 INFO L225 Difference]: With dead ends: 2080 [2021-06-05 15:07:52,770 INFO L226 Difference]: Without dead ends: 2071 [2021-06-05 15:07:52,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 788.4ms TimeCoverageRelationStatistics Valid=242, Invalid=1240, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:07:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-05 15:07:52,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1657. [2021-06-05 15:07:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1656 states have (on average 3.510265700483092) internal successors, (5813), 1656 states have internal predecessors, (5813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:52,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 5813 transitions. [2021-06-05 15:07:52,790 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 5813 transitions. Word has length 24 [2021-06-05 15:07:52,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:52,790 INFO L482 AbstractCegarLoop]: Abstraction has 1657 states and 5813 transitions. [2021-06-05 15:07:52,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:52,790 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 5813 transitions. [2021-06-05 15:07:52,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:52,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:52,793 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:53,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 15:07:53,009 INFO L430 AbstractCegarLoop]: === Iteration 172 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:53,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:53,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2099197488, now seen corresponding path program 69 times [2021-06-05 15:07:53,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:53,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454605140] [2021-06-05 15:07:53,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:53,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:53,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454605140] [2021-06-05 15:07:53,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454605140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:53,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942051598] [2021-06-05 15:07:53,170 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:53,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:07:53,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:53,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:07:53,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:53,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:53,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 21 treesize of output 53 [2021-06-05 15:07:53,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:53,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:53,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:53,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:476 [2021-06-05 15:07:53,570 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-06-05 15:07:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:53,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942051598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:53,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:53,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:07:53,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27095386] [2021-06-05 15:07:53,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:07:53,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:53,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:07:53,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:07:53,912 INFO L87 Difference]: Start difference. First operand 1657 states and 5813 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:54,647 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 15:07:54,902 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2021-06-05 15:07:55,678 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 15:07:55,809 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-06-05 15:07:56,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:56,371 INFO L93 Difference]: Finished difference Result 2129 states and 7217 transitions. [2021-06-05 15:07:56,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:07:56,371 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:56,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:56,375 INFO L225 Difference]: With dead ends: 2129 [2021-06-05 15:07:56,375 INFO L226 Difference]: Without dead ends: 2119 [2021-06-05 15:07:56,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2524.3ms TimeCoverageRelationStatistics Valid=471, Invalid=2285, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:07:56,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2119 states. [2021-06-05 15:07:56,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2119 to 1661. [2021-06-05 15:07:56,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1661 states, 1660 states have (on average 3.5096385542168673) internal successors, (5826), 1660 states have internal predecessors, (5826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:56,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1661 states to 1661 states and 5826 transitions. [2021-06-05 15:07:56,397 INFO L78 Accepts]: Start accepts. Automaton has 1661 states and 5826 transitions. Word has length 24 [2021-06-05 15:07:56,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:56,397 INFO L482 AbstractCegarLoop]: Abstraction has 1661 states and 5826 transitions. [2021-06-05 15:07:56,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:56,397 INFO L276 IsEmpty]: Start isEmpty. Operand 1661 states and 5826 transitions. [2021-06-05 15:07:56,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:56,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:56,399 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:56,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-05 15:07:56,599 INFO L430 AbstractCegarLoop]: === Iteration 173 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:56,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:56,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1317363688, now seen corresponding path program 70 times [2021-06-05 15:07:56,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:56,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684242630] [2021-06-05 15:07:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:56,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:56,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:56,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684242630] [2021-06-05 15:07:56,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684242630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:56,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599282723] [2021-06-05 15:07:56,761 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:56,789 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:56,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:56,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:56,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:56,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:07:56,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:56,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:56,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:56,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:07:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:56,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599282723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:56,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:56,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:07:56,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128886151] [2021-06-05 15:07:56,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:07:56,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:56,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:07:56,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:07:56,955 INFO L87 Difference]: Start difference. First operand 1661 states and 5826 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:57,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:57,624 INFO L93 Difference]: Finished difference Result 2022 states and 6939 transitions. [2021-06-05 15:07:57,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:07:57,625 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:57,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:57,628 INFO L225 Difference]: With dead ends: 2022 [2021-06-05 15:07:57,628 INFO L226 Difference]: Without dead ends: 2012 [2021-06-05 15:07:57,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 637.6ms TimeCoverageRelationStatistics Valid=191, Invalid=931, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:07:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2021-06-05 15:07:57,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1658. [2021-06-05 15:07:57,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 3.5093542546771275) internal successors, (5815), 1657 states have internal predecessors, (5815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:57,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 5815 transitions. [2021-06-05 15:07:57,669 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 5815 transitions. Word has length 24 [2021-06-05 15:07:57,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:57,669 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 5815 transitions. [2021-06-05 15:07:57,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:57,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 5815 transitions. [2021-06-05 15:07:57,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:57,671 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:57,671 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:57,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:57,873 INFO L430 AbstractCegarLoop]: === Iteration 174 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:57,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:57,873 INFO L82 PathProgramCache]: Analyzing trace with hash -372308144, now seen corresponding path program 71 times [2021-06-05 15:07:57,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:57,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655388764] [2021-06-05 15:07:57,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:58,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:58,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655388764] [2021-06-05 15:07:58,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655388764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:58,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171133346] [2021-06-05 15:07:58,056 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:58,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:07:58,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:58,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:58,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:58,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:07:58,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:58,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:58,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:58,213 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:07:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:58,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171133346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:58,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:58,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:07:58,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405009407] [2021-06-05 15:07:58,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:07:58,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:58,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:07:58,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:07:58,277 INFO L87 Difference]: Start difference. First operand 1658 states and 5815 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:59,181 INFO L93 Difference]: Finished difference Result 2057 states and 7052 transitions. [2021-06-05 15:07:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:07:59,181 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:07:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:59,184 INFO L225 Difference]: With dead ends: 2057 [2021-06-05 15:07:59,184 INFO L226 Difference]: Without dead ends: 2046 [2021-06-05 15:07:59,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 749.5ms TimeCoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:07:59,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-06-05 15:07:59,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1660. [2021-06-05 15:07:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 3.5087402049427365) internal successors, (5821), 1659 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 15:07:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 5821 transitions. [2021-06-05 15:07:59,204 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 5821 transitions. Word has length 24 [2021-06-05 15:07:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:59,204 INFO L482 AbstractCegarLoop]: Abstraction has 1660 states and 5821 transitions. [2021-06-05 15:07:59,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:59,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 5821 transitions. [2021-06-05 15:07:59,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:07:59,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:59,206 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:59,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:59,406 INFO L430 AbstractCegarLoop]: === Iteration 175 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:07:59,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:59,407 INFO L82 PathProgramCache]: Analyzing trace with hash 607106304, now seen corresponding path program 72 times [2021-06-05 15:07:59,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:59,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761720433] [2021-06-05 15:07:59,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:59,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:59,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:59,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761720433] [2021-06-05 15:07:59,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761720433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:59,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766172913] [2021-06-05 15:07:59,570 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:59,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:07:59,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:59,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:07:59,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:59,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:59,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:07:59,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:59,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:59,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:59,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:07:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:59,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766172913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:59,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:59,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:07:59,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112122121] [2021-06-05 15:07:59,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:07:59,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:59,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:07:59,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:07:59,876 INFO L87 Difference]: Start difference. First operand 1660 states and 5821 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:01,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:01,220 INFO L93 Difference]: Finished difference Result 2168 states and 7318 transitions. [2021-06-05 15:08:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:08:01,221 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:01,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:01,224 INFO L225 Difference]: With dead ends: 2168 [2021-06-05 15:08:01,224 INFO L226 Difference]: Without dead ends: 2149 [2021-06-05 15:08:01,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 1163.4ms TimeCoverageRelationStatistics Valid=387, Invalid=1775, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:08:01,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-06-05 15:08:01,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1662. [2021-06-05 15:08:01,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 3.5099337748344372) internal successors, (5830), 1661 states have internal predecessors, (5830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 5830 transitions. [2021-06-05 15:08:01,245 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 5830 transitions. Word has length 24 [2021-06-05 15:08:01,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:01,245 INFO L482 AbstractCegarLoop]: Abstraction has 1662 states and 5830 transitions. [2021-06-05 15:08:01,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 5830 transitions. [2021-06-05 15:08:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:01,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:01,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:01,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-06-05 15:08:01,447 INFO L430 AbstractCegarLoop]: === Iteration 176 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1967070794, now seen corresponding path program 73 times [2021-06-05 15:08:01,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:01,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903663639] [2021-06-05 15:08:01,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:01,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:01,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903663639] [2021-06-05 15:08:01,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903663639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:01,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585077143] [2021-06-05 15:08:01,603 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:01,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:01,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:01,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:08:01,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:01,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:01,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:01,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:08:01,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:01,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585077143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:01,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:01,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:08:01,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907281820] [2021-06-05 15:08:01,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:08:01,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:01,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:08:01,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:08:01,821 INFO L87 Difference]: Start difference. First operand 1662 states and 5830 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:02,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:02,607 INFO L93 Difference]: Finished difference Result 2006 states and 6892 transitions. [2021-06-05 15:08:02,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:08:02,608 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:02,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:02,610 INFO L225 Difference]: With dead ends: 2006 [2021-06-05 15:08:02,610 INFO L226 Difference]: Without dead ends: 1996 [2021-06-05 15:08:02,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 688.8ms TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:08:02,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1996 states. [2021-06-05 15:08:02,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1996 to 1660. [2021-06-05 15:08:02,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 3.5099457504520797) internal successors, (5823), 1659 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 15:08:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 5823 transitions. [2021-06-05 15:08:02,630 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 5823 transitions. Word has length 24 [2021-06-05 15:08:02,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:02,630 INFO L482 AbstractCegarLoop]: Abstraction has 1660 states and 5823 transitions. [2021-06-05 15:08:02,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:02,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 5823 transitions. [2021-06-05 15:08:02,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:02,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:02,632 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:02,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:02,832 INFO L430 AbstractCegarLoop]: === Iteration 177 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:02,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:02,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1147399810, now seen corresponding path program 69 times [2021-06-05 15:08:02,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:02,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763169233] [2021-06-05 15:08:02,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:03,060 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:03,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:03,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763169233] [2021-06-05 15:08:03,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763169233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:03,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094232866] [2021-06-05 15:08:03,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:03,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:08:03,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:03,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:03,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:03,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:03,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:03,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:03,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:03,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:03,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:03,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:08:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:03,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094232866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:03,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:03,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:08:03,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854663421] [2021-06-05 15:08:03,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:03,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:03,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:03,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:03,416 INFO L87 Difference]: Start difference. First operand 1660 states and 5823 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:04,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:04,536 INFO L93 Difference]: Finished difference Result 2254 states and 7645 transitions. [2021-06-05 15:08:04,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:08:04,536 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:04,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:04,540 INFO L225 Difference]: With dead ends: 2254 [2021-06-05 15:08:04,540 INFO L226 Difference]: Without dead ends: 2244 [2021-06-05 15:08:04,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 895.5ms TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:08:04,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2021-06-05 15:08:04,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1663. [2021-06-05 15:08:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.509025270758123) internal successors, (5832), 1662 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5832 transitions. [2021-06-05 15:08:04,562 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5832 transitions. Word has length 24 [2021-06-05 15:08:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:04,562 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 5832 transitions. [2021-06-05 15:08:04,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5832 transitions. [2021-06-05 15:08:04,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:04,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:04,564 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:04,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:04,765 INFO L430 AbstractCegarLoop]: === Iteration 178 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:04,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:04,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1639485428, now seen corresponding path program 70 times [2021-06-05 15:08:04,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:04,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085848045] [2021-06-05 15:08:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:04,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:04,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085848045] [2021-06-05 15:08:04,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085848045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:04,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687055885] [2021-06-05 15:08:04,957 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:04,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:04,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:04,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:04,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:05,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:05,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:05,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:05,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:05,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:08:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:05,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687055885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:05,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:05,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:08:05,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902479972] [2021-06-05 15:08:05,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:05,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:05,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:05,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:05,162 INFO L87 Difference]: Start difference. First operand 1663 states and 5832 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:06,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:06,504 INFO L93 Difference]: Finished difference Result 2340 states and 7929 transitions. [2021-06-05 15:08:06,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:08:06,504 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:06,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:06,508 INFO L225 Difference]: With dead ends: 2340 [2021-06-05 15:08:06,508 INFO L226 Difference]: Without dead ends: 2318 [2021-06-05 15:08:06,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 973.7ms TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:08:06,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-06-05 15:08:06,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 1666. [2021-06-05 15:08:06,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 3.5081081081081082) internal successors, (5841), 1665 states have internal predecessors, (5841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:06,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 5841 transitions. [2021-06-05 15:08:06,530 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 5841 transitions. Word has length 24 [2021-06-05 15:08:06,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:06,530 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 5841 transitions. [2021-06-05 15:08:06,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:06,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 5841 transitions. [2021-06-05 15:08:06,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:06,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:06,532 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:06,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:06,732 INFO L430 AbstractCegarLoop]: === Iteration 179 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:06,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:06,733 INFO L82 PathProgramCache]: Analyzing trace with hash -719238356, now seen corresponding path program 71 times [2021-06-05 15:08:06,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:06,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567791542] [2021-06-05 15:08:06,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:06,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:06,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567791542] [2021-06-05 15:08:06,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567791542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:06,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289113742] [2021-06-05 15:08:06,903 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:06,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:08:06,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:06,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:06,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:07,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:07,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:07,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:07,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:07,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-06-05 15:08:07,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:07,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:07,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:07,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-06-05 15:08:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:07,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289113742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:07,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:07,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:08:07,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704990775] [2021-06-05 15:08:07,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:07,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:07,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:07,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:07,203 INFO L87 Difference]: Start difference. First operand 1666 states and 5841 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:08,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:08,465 INFO L93 Difference]: Finished difference Result 2248 states and 7620 transitions. [2021-06-05 15:08:08,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:08:08,465 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:08,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:08,469 INFO L225 Difference]: With dead ends: 2248 [2021-06-05 15:08:08,469 INFO L226 Difference]: Without dead ends: 2226 [2021-06-05 15:08:08,469 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 946.4ms TimeCoverageRelationStatistics Valid=242, Invalid=1650, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:08:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-06-05 15:08:08,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1669. [2021-06-05 15:08:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.5071942446043165) internal successors, (5850), 1668 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:08,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5850 transitions. [2021-06-05 15:08:08,491 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5850 transitions. Word has length 24 [2021-06-05 15:08:08,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:08,491 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5850 transitions. [2021-06-05 15:08:08,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:08,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5850 transitions. [2021-06-05 15:08:08,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:08,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:08,493 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:08,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:08,697 INFO L430 AbstractCegarLoop]: === Iteration 180 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:08,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:08,697 INFO L82 PathProgramCache]: Analyzing trace with hash -895779788, now seen corresponding path program 72 times [2021-06-05 15:08:08,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:08,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653905247] [2021-06-05 15:08:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:08,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:08,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:08,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653905247] [2021-06-05 15:08:08,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653905247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:08,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644857598] [2021-06-05 15:08:08,857 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:08,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:08:08,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:08,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:08,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:09,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:09,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:08:09,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:09,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:09,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:09,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:08:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:09,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644857598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:09,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:09,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:08:09,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721228861] [2021-06-05 15:08:09,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:09,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:09,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:09,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:09,107 INFO L87 Difference]: Start difference. First operand 1669 states and 5850 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:10,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:10,142 INFO L93 Difference]: Finished difference Result 2232 states and 7581 transitions. [2021-06-05 15:08:10,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:08:10,142 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:10,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:10,146 INFO L225 Difference]: With dead ends: 2232 [2021-06-05 15:08:10,146 INFO L226 Difference]: Without dead ends: 2222 [2021-06-05 15:08:10,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 932.5ms TimeCoverageRelationStatistics Valid=310, Invalid=1760, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:08:10,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2222 states. [2021-06-05 15:08:10,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2222 to 1673. [2021-06-05 15:08:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 3.5053827751196174) internal successors, (5861), 1672 states have internal predecessors, (5861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:10,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 5861 transitions. [2021-06-05 15:08:10,167 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 5861 transitions. Word has length 24 [2021-06-05 15:08:10,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:10,167 INFO L482 AbstractCegarLoop]: Abstraction has 1673 states and 5861 transitions. [2021-06-05 15:08:10,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:10,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 5861 transitions. [2021-06-05 15:08:10,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:10,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:10,169 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:10,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-06-05 15:08:10,370 INFO L430 AbstractCegarLoop]: === Iteration 181 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:10,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:10,370 INFO L82 PathProgramCache]: Analyzing trace with hash -412454626, now seen corresponding path program 73 times [2021-06-05 15:08:10,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:10,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790153652] [2021-06-05 15:08:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:10,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:10,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:10,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790153652] [2021-06-05 15:08:10,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790153652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:10,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719893737] [2021-06-05 15:08:10,533 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:10,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:10,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:10,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:08:10,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:10,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:10,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:10,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:08:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:10,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719893737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:10,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:10,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:08:10,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126745130] [2021-06-05 15:08:10,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:10,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:10,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:10,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:10,726 INFO L87 Difference]: Start difference. First operand 1673 states and 5861 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:11,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:11,670 INFO L93 Difference]: Finished difference Result 2202 states and 7495 transitions. [2021-06-05 15:08:11,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:08:11,670 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:11,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:11,673 INFO L225 Difference]: With dead ends: 2202 [2021-06-05 15:08:11,673 INFO L226 Difference]: Without dead ends: 2191 [2021-06-05 15:08:11,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 723.4ms TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:08:11,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2021-06-05 15:08:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 1660. [2021-06-05 15:08:11,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 3.5099457504520797) internal successors, (5823), 1659 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 15:08:11,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 5823 transitions. [2021-06-05 15:08:11,694 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 5823 transitions. Word has length 24 [2021-06-05 15:08:11,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:11,694 INFO L482 AbstractCegarLoop]: Abstraction has 1660 states and 5823 transitions. [2021-06-05 15:08:11,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:11,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 5823 transitions. [2021-06-05 15:08:11,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:11,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:11,696 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:11,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-05 15:08:11,897 INFO L430 AbstractCegarLoop]: === Iteration 182 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:11,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:11,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1796534024, now seen corresponding path program 74 times [2021-06-05 15:08:11,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:11,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219813480] [2021-06-05 15:08:11,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:12,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:12,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:12,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219813480] [2021-06-05 15:08:12,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219813480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:12,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798299626] [2021-06-05 15:08:12,068 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:12,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:12,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:12,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:12,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:12,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:12,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:12,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:12,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:12,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:12,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:12,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:08:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:12,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798299626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:12,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:12,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:08:12,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457313344] [2021-06-05 15:08:12,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:12,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:12,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:12,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:12,343 INFO L87 Difference]: Start difference. First operand 1660 states and 5823 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:13,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:13,326 INFO L93 Difference]: Finished difference Result 2228 states and 7569 transitions. [2021-06-05 15:08:13,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:08:13,326 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:13,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:13,329 INFO L225 Difference]: With dead ends: 2228 [2021-06-05 15:08:13,329 INFO L226 Difference]: Without dead ends: 2219 [2021-06-05 15:08:13,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 759.8ms TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:08:13,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2021-06-05 15:08:13,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 1663. [2021-06-05 15:08:13,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 3.5096269554753308) internal successors, (5833), 1662 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 15:08:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 5833 transitions. [2021-06-05 15:08:13,352 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 5833 transitions. Word has length 24 [2021-06-05 15:08:13,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:13,352 INFO L482 AbstractCegarLoop]: Abstraction has 1663 states and 5833 transitions. [2021-06-05 15:08:13,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:13,352 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 5833 transitions. [2021-06-05 15:08:13,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:13,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:13,354 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:13,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 15:08:13,555 INFO L430 AbstractCegarLoop]: === Iteration 183 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:13,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:13,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1586996644, now seen corresponding path program 75 times [2021-06-05 15:08:13,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:13,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902279902] [2021-06-05 15:08:13,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:13,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:13,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:13,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902279902] [2021-06-05 15:08:13,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902279902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:13,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222672889] [2021-06-05 15:08:13,753 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:13,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:08:13,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:13,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:13,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:13,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:13,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:13,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:13,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:13,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:08:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:13,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222672889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:13,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:13,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:08:13,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584486709] [2021-06-05 15:08:13,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:13,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:13,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:13,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:13,958 INFO L87 Difference]: Start difference. First operand 1663 states and 5833 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:15,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:15,187 INFO L93 Difference]: Finished difference Result 2272 states and 7714 transitions. [2021-06-05 15:08:15,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:08:15,187 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:15,191 INFO L225 Difference]: With dead ends: 2272 [2021-06-05 15:08:15,191 INFO L226 Difference]: Without dead ends: 2253 [2021-06-05 15:08:15,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 930.7ms TimeCoverageRelationStatistics Valid=275, Invalid=1617, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:08:15,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-06-05 15:08:15,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 1666. [2021-06-05 15:08:15,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1665 states have (on average 3.5093093093093093) internal successors, (5843), 1665 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:15,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 5843 transitions. [2021-06-05 15:08:15,212 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 5843 transitions. Word has length 24 [2021-06-05 15:08:15,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:15,212 INFO L482 AbstractCegarLoop]: Abstraction has 1666 states and 5843 transitions. [2021-06-05 15:08:15,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:15,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 5843 transitions. [2021-06-05 15:08:15,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:15,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:15,214 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:15,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:15,415 INFO L430 AbstractCegarLoop]: === Iteration 184 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:15,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:15,415 INFO L82 PathProgramCache]: Analyzing trace with hash -979298906, now seen corresponding path program 76 times [2021-06-05 15:08:15,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:15,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450209500] [2021-06-05 15:08:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:15,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:15,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450209500] [2021-06-05 15:08:15,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450209500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:15,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438885504] [2021-06-05 15:08:15,617 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:15,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:15,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:15,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:15,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:15,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:15,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:15,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:15,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:15,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:08:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:15,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438885504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:15,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:15,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:08:15,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20931687] [2021-06-05 15:08:15,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:15,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:15,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:15,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:15,818 INFO L87 Difference]: Start difference. First operand 1666 states and 5843 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:17,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:17,000 INFO L93 Difference]: Finished difference Result 2224 states and 7572 transitions. [2021-06-05 15:08:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:08:17,000 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:17,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:17,004 INFO L225 Difference]: With dead ends: 2224 [2021-06-05 15:08:17,004 INFO L226 Difference]: Without dead ends: 2205 [2021-06-05 15:08:17,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 901.3ms TimeCoverageRelationStatistics Valid=268, Invalid=1538, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:08:17,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-06-05 15:08:17,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1669. [2021-06-05 15:08:17,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.508992805755396) internal successors, (5853), 1668 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5853 transitions. [2021-06-05 15:08:17,025 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5853 transitions. Word has length 24 [2021-06-05 15:08:17,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:17,025 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5853 transitions. [2021-06-05 15:08:17,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:17,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5853 transitions. [2021-06-05 15:08:17,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:17,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:17,028 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:17,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2021-06-05 15:08:17,228 INFO L430 AbstractCegarLoop]: === Iteration 185 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:17,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:17,228 INFO L82 PathProgramCache]: Analyzing trace with hash -2007448766, now seen corresponding path program 77 times [2021-06-05 15:08:17,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:17,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248922312] [2021-06-05 15:08:17,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:17,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:17,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248922312] [2021-06-05 15:08:17,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248922312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:17,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008982926] [2021-06-05 15:08:17,377 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:17,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:08:17,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:17,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:17,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:17,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:08:17,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:17,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:17,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:17,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:08:17,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:17,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008982926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:17,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:17,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:08:17,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772585591] [2021-06-05 15:08:17,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:17,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:17,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:17,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:17,578 INFO L87 Difference]: Start difference. First operand 1669 states and 5853 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:18,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:18,301 INFO L93 Difference]: Finished difference Result 2193 states and 7486 transitions. [2021-06-05 15:08:18,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:08:18,302 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:18,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:18,305 INFO L225 Difference]: With dead ends: 2193 [2021-06-05 15:08:18,305 INFO L226 Difference]: Without dead ends: 2184 [2021-06-05 15:08:18,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 641.3ms TimeCoverageRelationStatistics Valid=221, Invalid=1111, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:08:18,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2021-06-05 15:08:18,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 1676. [2021-06-05 15:08:18,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5074626865671643) internal successors, (5875), 1675 states have internal predecessors, (5875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:18,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5875 transitions. [2021-06-05 15:08:18,326 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5875 transitions. Word has length 24 [2021-06-05 15:08:18,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:18,326 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 5875 transitions. [2021-06-05 15:08:18,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:18,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5875 transitions. [2021-06-05 15:08:18,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:18,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:18,328 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:18,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:18,529 INFO L430 AbstractCegarLoop]: === Iteration 186 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:18,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:18,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1881534, now seen corresponding path program 78 times [2021-06-05 15:08:18,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:18,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873103155] [2021-06-05 15:08:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:18,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:18,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873103155] [2021-06-05 15:08:18,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873103155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:18,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432341691] [2021-06-05 15:08:18,721 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:18,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:08:18,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:18,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:08:18,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:18,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:18,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:18,988 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:18,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:08:18,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:19,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:19,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 15:08:19,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:118 [2021-06-05 15:08:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:19,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432341691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:19,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:19,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 15:08:19,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855093340] [2021-06-05 15:08:19,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:19,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:19,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:19,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:19,143 INFO L87 Difference]: Start difference. First operand 1676 states and 5875 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:20,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:20,217 INFO L93 Difference]: Finished difference Result 2099 states and 7191 transitions. [2021-06-05 15:08:20,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:08:20,218 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:20,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:20,221 INFO L225 Difference]: With dead ends: 2099 [2021-06-05 15:08:20,221 INFO L226 Difference]: Without dead ends: 2086 [2021-06-05 15:08:20,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 975.4ms TimeCoverageRelationStatistics Valid=247, Invalid=1475, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:08:20,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2021-06-05 15:08:20,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 1680. [2021-06-05 15:08:20,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5080405002977963) internal successors, (5890), 1679 states have internal predecessors, (5890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:20,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5890 transitions. [2021-06-05 15:08:20,242 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5890 transitions. Word has length 24 [2021-06-05 15:08:20,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:20,242 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5890 transitions. [2021-06-05 15:08:20,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:20,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5890 transitions. [2021-06-05 15:08:20,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:20,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:20,244 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:20,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:20,445 INFO L430 AbstractCegarLoop]: === Iteration 187 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:20,445 INFO L82 PathProgramCache]: Analyzing trace with hash -528846374, now seen corresponding path program 79 times [2021-06-05 15:08:20,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:20,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784798545] [2021-06-05 15:08:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:20,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:20,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784798545] [2021-06-05 15:08:20,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784798545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:20,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859347358] [2021-06-05 15:08:20,604 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:20,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:20,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:20,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:08:20,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:20,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:20,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:20,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:08:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:20,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859347358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:20,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:20,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:08:20,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275990032] [2021-06-05 15:08:20,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:20,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:20,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:20,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:20,800 INFO L87 Difference]: Start difference. First operand 1680 states and 5890 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:21,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:21,595 INFO L93 Difference]: Finished difference Result 2165 states and 7395 transitions. [2021-06-05 15:08:21,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:08:21,595 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:21,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:21,598 INFO L225 Difference]: With dead ends: 2165 [2021-06-05 15:08:21,598 INFO L226 Difference]: Without dead ends: 2156 [2021-06-05 15:08:21,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 655.8ms TimeCoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:08:21,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2156 states. [2021-06-05 15:08:21,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2156 to 1669. [2021-06-05 15:08:21,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.5077937649880098) internal successors, (5851), 1668 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 15:08:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5851 transitions. [2021-06-05 15:08:21,619 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5851 transitions. Word has length 24 [2021-06-05 15:08:21,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:21,619 INFO L482 AbstractCegarLoop]: Abstraction has 1669 states and 5851 transitions. [2021-06-05 15:08:21,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:21,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5851 transitions. [2021-06-05 15:08:21,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:21,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:21,622 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:21,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2021-06-05 15:08:21,822 INFO L430 AbstractCegarLoop]: === Iteration 188 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:21,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:21,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1485847398, now seen corresponding path program 74 times [2021-06-05 15:08:21,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:21,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470384529] [2021-06-05 15:08:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:22,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:22,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470384529] [2021-06-05 15:08:22,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470384529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:22,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532103060] [2021-06-05 15:08:22,037 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:22,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:22,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:22,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:22,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:22,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:22,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:22,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:22,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:22,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:22,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:22,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:08:22,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:22,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532103060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:22,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:22,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:08:22,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851823456] [2021-06-05 15:08:22,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:22,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:22,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:22,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:22,305 INFO L87 Difference]: Start difference. First operand 1669 states and 5851 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:23,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:23,802 INFO L93 Difference]: Finished difference Result 2362 states and 7905 transitions. [2021-06-05 15:08:23,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:08:23,802 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:23,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:23,805 INFO L225 Difference]: With dead ends: 2362 [2021-06-05 15:08:23,805 INFO L226 Difference]: Without dead ends: 2302 [2021-06-05 15:08:23,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1243.9ms TimeCoverageRelationStatistics Valid=341, Invalid=2109, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:08:23,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2021-06-05 15:08:23,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1674. [2021-06-05 15:08:23,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.506276150627615) internal successors, (5866), 1673 states have internal predecessors, (5866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:23,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5866 transitions. [2021-06-05 15:08:23,826 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5866 transitions. Word has length 24 [2021-06-05 15:08:23,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:23,826 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5866 transitions. [2021-06-05 15:08:23,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5866 transitions. [2021-06-05 15:08:23,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:23,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:23,829 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:24,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-05 15:08:24,030 INFO L430 AbstractCegarLoop]: === Iteration 189 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:24,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:24,030 INFO L82 PathProgramCache]: Analyzing trace with hash -221549916, now seen corresponding path program 75 times [2021-06-05 15:08:24,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:24,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395794278] [2021-06-05 15:08:24,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:24,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:24,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395794278] [2021-06-05 15:08:24,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395794278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:24,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326285868] [2021-06-05 15:08:24,222 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:24,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:08:24,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:24,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:24,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:24,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:24,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:24,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:24,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:24,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:08:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:24,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326285868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:24,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:24,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:08:24,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477030696] [2021-06-05 15:08:24,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:24,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:24,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:24,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:24,465 INFO L87 Difference]: Start difference. First operand 1674 states and 5866 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:26,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:26,092 INFO L93 Difference]: Finished difference Result 2284 states and 7716 transitions. [2021-06-05 15:08:26,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:08:26,093 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:26,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:26,096 INFO L225 Difference]: With dead ends: 2284 [2021-06-05 15:08:26,096 INFO L226 Difference]: Without dead ends: 2242 [2021-06-05 15:08:26,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1333.3ms TimeCoverageRelationStatistics Valid=386, Invalid=2266, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:08:26,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-06-05 15:08:26,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 1677. [2021-06-05 15:08:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 3.5053699284009547) internal successors, (5875), 1676 states have internal predecessors, (5875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:26,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5875 transitions. [2021-06-05 15:08:26,117 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5875 transitions. Word has length 24 [2021-06-05 15:08:26,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:26,118 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5875 transitions. [2021-06-05 15:08:26,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:26,118 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5875 transitions. [2021-06-05 15:08:26,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:26,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:26,120 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:26,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2021-06-05 15:08:26,320 INFO L430 AbstractCegarLoop]: === Iteration 190 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:26,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:26,320 INFO L82 PathProgramCache]: Analyzing trace with hash -398091348, now seen corresponding path program 76 times [2021-06-05 15:08:26,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:26,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852320113] [2021-06-05 15:08:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:26,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:26,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852320113] [2021-06-05 15:08:26,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852320113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:26,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207185417] [2021-06-05 15:08:26,480 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:26,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:26,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:26,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:26,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:26,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:08:26,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:26,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:26,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:26,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:08:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:26,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207185417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:26,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:26,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:08:26,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734017986] [2021-06-05 15:08:26,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:26,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:26,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:26,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:26,673 INFO L87 Difference]: Start difference. First operand 1677 states and 5875 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:27,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:27,862 INFO L93 Difference]: Finished difference Result 2173 states and 7397 transitions. [2021-06-05 15:08:27,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:08:27,863 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:27,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:27,866 INFO L225 Difference]: With dead ends: 2173 [2021-06-05 15:08:27,866 INFO L226 Difference]: Without dead ends: 2143 [2021-06-05 15:08:27,866 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 972.2ms TimeCoverageRelationStatistics Valid=354, Invalid=1808, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:08:27,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2143 states. [2021-06-05 15:08:27,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2143 to 1679. [2021-06-05 15:08:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1679 states, 1678 states have (on average 3.505363528009535) internal successors, (5882), 1678 states have internal predecessors, (5882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:27,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1679 states to 1679 states and 5882 transitions. [2021-06-05 15:08:27,887 INFO L78 Accepts]: Start accepts. Automaton has 1679 states and 5882 transitions. Word has length 24 [2021-06-05 15:08:27,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:27,887 INFO L482 AbstractCegarLoop]: Abstraction has 1679 states and 5882 transitions. [2021-06-05 15:08:27,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:27,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1679 states and 5882 transitions. [2021-06-05 15:08:27,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:27,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:27,889 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:28,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:28,090 INFO L430 AbstractCegarLoop]: === Iteration 191 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:28,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:28,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1231829788, now seen corresponding path program 77 times [2021-06-05 15:08:28,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:28,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030996610] [2021-06-05 15:08:28,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:28,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:28,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030996610] [2021-06-05 15:08:28,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030996610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:28,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831205101] [2021-06-05 15:08:28,254 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:28,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:08:28,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:28,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:28,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:28,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:08:28,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:28,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:28,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:28,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:08:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:28,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831205101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:28,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:28,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:08:28,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23162705] [2021-06-05 15:08:28,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:28,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:28,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:28,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:28,455 INFO L87 Difference]: Start difference. First operand 1679 states and 5882 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:29,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:29,528 INFO L93 Difference]: Finished difference Result 2149 states and 7324 transitions. [2021-06-05 15:08:29,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:08:29,529 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:29,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:29,532 INFO L225 Difference]: With dead ends: 2149 [2021-06-05 15:08:29,532 INFO L226 Difference]: Without dead ends: 2123 [2021-06-05 15:08:29,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 852.8ms TimeCoverageRelationStatistics Valid=272, Invalid=1534, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:08:29,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2021-06-05 15:08:29,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1671. [2021-06-05 15:08:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.507185628742515) internal successors, (5857), 1670 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:29,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5857 transitions. [2021-06-05 15:08:29,552 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5857 transitions. Word has length 24 [2021-06-05 15:08:29,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:29,552 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5857 transitions. [2021-06-05 15:08:29,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:29,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5857 transitions. [2021-06-05 15:08:29,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:29,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:29,554 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:29,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:29,757 INFO L430 AbstractCegarLoop]: === Iteration 192 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:29,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:29,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1241517520, now seen corresponding path program 80 times [2021-06-05 15:08:29,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:29,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607184824] [2021-06-05 15:08:29,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:29,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:29,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607184824] [2021-06-05 15:08:29,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607184824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:29,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013709460] [2021-06-05 15:08:29,943 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:29,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:29,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:29,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:29,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:30,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:30,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:30,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:30,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:30,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:30,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:30,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:08:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:30,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013709460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:30,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:30,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:08:30,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361541170] [2021-06-05 15:08:30,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:30,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:30,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:30,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:30,229 INFO L87 Difference]: Start difference. First operand 1671 states and 5857 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:31,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:31,710 INFO L93 Difference]: Finished difference Result 2325 states and 7797 transitions. [2021-06-05 15:08:31,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:08:31,711 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:31,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:31,714 INFO L225 Difference]: With dead ends: 2325 [2021-06-05 15:08:31,714 INFO L226 Difference]: Without dead ends: 2275 [2021-06-05 15:08:31,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1231.7ms TimeCoverageRelationStatistics Valid=359, Invalid=2191, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:08:31,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2275 states. [2021-06-05 15:08:31,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2275 to 1674. [2021-06-05 15:08:31,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 3.5068738792588166) internal successors, (5867), 1673 states have internal predecessors, (5867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 5867 transitions. [2021-06-05 15:08:31,734 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 5867 transitions. Word has length 24 [2021-06-05 15:08:31,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:31,734 INFO L482 AbstractCegarLoop]: Abstraction has 1674 states and 5867 transitions. [2021-06-05 15:08:31,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:31,734 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 5867 transitions. [2021-06-05 15:08:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:31,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:31,737 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:31,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-05 15:08:31,941 INFO L430 AbstractCegarLoop]: === Iteration 193 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:31,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:31,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1324778030, now seen corresponding path program 81 times [2021-06-05 15:08:31,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:31,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234360237] [2021-06-05 15:08:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:32,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:32,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234360237] [2021-06-05 15:08:32,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234360237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:32,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220786107] [2021-06-05 15:08:32,207 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:32,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:08:32,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:32,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:32,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:32,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:32,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:08:32,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:32,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:32,472 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:32,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:08:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:32,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220786107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:32,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:32,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:08:32,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609537951] [2021-06-05 15:08:32,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:32,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:32,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:32,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:32,539 INFO L87 Difference]: Start difference. First operand 1674 states and 5867 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:32,902 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-06-05 15:08:35,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:35,060 INFO L93 Difference]: Finished difference Result 2304 states and 7763 transitions. [2021-06-05 15:08:35,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 15:08:35,061 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:35,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:35,064 INFO L225 Difference]: With dead ends: 2304 [2021-06-05 15:08:35,064 INFO L226 Difference]: Without dead ends: 2265 [2021-06-05 15:08:35,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 2259.6ms TimeCoverageRelationStatistics Valid=579, Invalid=3327, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:08:35,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2265 states. [2021-06-05 15:08:35,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2265 to 1677. [2021-06-05 15:08:35,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1677 states, 1676 states have (on average 3.506563245823389) internal successors, (5877), 1676 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:35,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 5877 transitions. [2021-06-05 15:08:35,087 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 5877 transitions. Word has length 24 [2021-06-05 15:08:35,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:35,087 INFO L482 AbstractCegarLoop]: Abstraction has 1677 states and 5877 transitions. [2021-06-05 15:08:35,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:35,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 5877 transitions. [2021-06-05 15:08:35,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:35,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:35,090 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:35,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:35,290 INFO L430 AbstractCegarLoop]: === Iteration 194 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:35,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:35,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1942039406, now seen corresponding path program 82 times [2021-06-05 15:08:35,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:35,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596541733] [2021-06-05 15:08:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:35,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:35,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596541733] [2021-06-05 15:08:35,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596541733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:35,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120825242] [2021-06-05 15:08:35,448 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:35,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:35,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:35,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:35,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:35,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:08:35,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:35,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:35,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:35,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:08:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:35,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120825242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:35,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:35,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:08:35,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475171390] [2021-06-05 15:08:35,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:35,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:35,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:35,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:35,665 INFO L87 Difference]: Start difference. First operand 1677 states and 5877 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:36,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:36,761 INFO L93 Difference]: Finished difference Result 2148 states and 7323 transitions. [2021-06-05 15:08:36,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:08:36,761 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:36,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:36,764 INFO L225 Difference]: With dead ends: 2148 [2021-06-05 15:08:36,764 INFO L226 Difference]: Without dead ends: 2122 [2021-06-05 15:08:36,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 936.4ms TimeCoverageRelationStatistics Valid=329, Invalid=1651, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:08:36,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-06-05 15:08:36,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1680. [2021-06-05 15:08:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5050625372245383) internal successors, (5885), 1679 states have internal predecessors, (5885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:36,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 5885 transitions. [2021-06-05 15:08:36,785 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 5885 transitions. Word has length 24 [2021-06-05 15:08:36,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:36,785 INFO L482 AbstractCegarLoop]: Abstraction has 1680 states and 5885 transitions. [2021-06-05 15:08:36,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:36,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 5885 transitions. [2021-06-05 15:08:36,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:36,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:36,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:36,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-06-05 15:08:36,988 INFO L430 AbstractCegarLoop]: === Iteration 195 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:36,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:36,988 INFO L82 PathProgramCache]: Analyzing trace with hash -2029341712, now seen corresponding path program 83 times [2021-06-05 15:08:36,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:36,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168070455] [2021-06-05 15:08:36,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:37,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:37,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:37,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168070455] [2021-06-05 15:08:37,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168070455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:37,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923048561] [2021-06-05 15:08:37,162 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:37,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:37,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:37,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:37,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:37,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:08:37,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:37,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:37,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:37,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:08:37,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:37,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923048561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:37,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:37,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:08:37,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330498537] [2021-06-05 15:08:37,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:37,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:37,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:37,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:37,380 INFO L87 Difference]: Start difference. First operand 1680 states and 5885 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:38,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:38,320 INFO L93 Difference]: Finished difference Result 2123 states and 7249 transitions. [2021-06-05 15:08:38,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:08:38,320 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:38,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:38,323 INFO L225 Difference]: With dead ends: 2123 [2021-06-05 15:08:38,323 INFO L226 Difference]: Without dead ends: 2098 [2021-06-05 15:08:38,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 802.0ms TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:08:38,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2021-06-05 15:08:38,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 1671. [2021-06-05 15:08:38,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.507185628742515) internal successors, (5857), 1670 states have internal predecessors, (5857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5857 transitions. [2021-06-05 15:08:38,341 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5857 transitions. Word has length 24 [2021-06-05 15:08:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:38,342 INFO L482 AbstractCegarLoop]: Abstraction has 1671 states and 5857 transitions. [2021-06-05 15:08:38,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:38,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5857 transitions. [2021-06-05 15:08:38,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:38,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:38,344 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:38,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2021-06-05 15:08:38,544 INFO L430 AbstractCegarLoop]: === Iteration 196 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:38,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:38,544 INFO L82 PathProgramCache]: Analyzing trace with hash -738169602, now seen corresponding path program 78 times [2021-06-05 15:08:38,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:38,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937373830] [2021-06-05 15:08:38,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:38,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:38,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:38,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937373830] [2021-06-05 15:08:38,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937373830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:38,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968521455] [2021-06-05 15:08:38,729 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:38,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:08:38,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:38,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:38,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:38,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:38,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:38,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:38,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 40 [2021-06-05 15:08:38,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:08:38,983 INFO L628 ElimStorePlain]: treesize reduction 31, result has 44.6 percent of original size [2021-06-05 15:08:38,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:38,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:19 [2021-06-05 15:08:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:39,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968521455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:39,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:39,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:08:39,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183042419] [2021-06-05 15:08:39,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:08:39,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:39,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:08:39,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:08:39,051 INFO L87 Difference]: Start difference. First operand 1671 states and 5857 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:41,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:41,160 INFO L93 Difference]: Finished difference Result 2486 states and 8299 transitions. [2021-06-05 15:08:41,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:08:41,161 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:41,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:41,164 INFO L225 Difference]: With dead ends: 2486 [2021-06-05 15:08:41,165 INFO L226 Difference]: Without dead ends: 2396 [2021-06-05 15:08:41,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1600.6ms TimeCoverageRelationStatistics Valid=418, Invalid=2774, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:08:41,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2396 states. [2021-06-05 15:08:41,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2396 to 1686. [2021-06-05 15:08:41,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1686 states, 1685 states have (on average 3.5050445103857566) internal successors, (5906), 1685 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:41,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1686 states to 1686 states and 5906 transitions. [2021-06-05 15:08:41,187 INFO L78 Accepts]: Start accepts. Automaton has 1686 states and 5906 transitions. Word has length 24 [2021-06-05 15:08:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:41,187 INFO L482 AbstractCegarLoop]: Abstraction has 1686 states and 5906 transitions. [2021-06-05 15:08:41,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:41,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1686 states and 5906 transitions. [2021-06-05 15:08:41,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:41,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:41,190 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:41,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 15:08:41,390 INFO L430 AbstractCegarLoop]: === Iteration 197 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:41,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:41,390 INFO L82 PathProgramCache]: Analyzing trace with hash -520744716, now seen corresponding path program 79 times [2021-06-05 15:08:41,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:41,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317130977] [2021-06-05 15:08:41,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:41,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:41,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:41,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317130977] [2021-06-05 15:08:41,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317130977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:41,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528366031] [2021-06-05 15:08:41,557 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:41,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:41,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:41,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:08:41,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:41,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:41,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:41,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:08:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:41,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528366031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:41,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:41,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:08:41,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562004791] [2021-06-05 15:08:41,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:41,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:41,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:41,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:41,743 INFO L87 Difference]: Start difference. First operand 1686 states and 5906 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:43,669 INFO L93 Difference]: Finished difference Result 2547 states and 8513 transitions. [2021-06-05 15:08:43,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:08:43,670 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:43,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:43,673 INFO L225 Difference]: With dead ends: 2547 [2021-06-05 15:08:43,673 INFO L226 Difference]: Without dead ends: 2487 [2021-06-05 15:08:43,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 1601.2ms TimeCoverageRelationStatistics Valid=611, Invalid=2811, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:08:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2021-06-05 15:08:43,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 1726. [2021-06-05 15:08:43,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 3.508985507246377) internal successors, (6053), 1725 states have internal predecessors, (6053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:43,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 6053 transitions. [2021-06-05 15:08:43,696 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 6053 transitions. Word has length 24 [2021-06-05 15:08:43,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:43,696 INFO L482 AbstractCegarLoop]: Abstraction has 1726 states and 6053 transitions. [2021-06-05 15:08:43,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:43,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 6053 transitions. [2021-06-05 15:08:43,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:43,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:43,698 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:43,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:43,901 INFO L430 AbstractCegarLoop]: === Iteration 198 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:43,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:43,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1354483156, now seen corresponding path program 80 times [2021-06-05 15:08:43,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:43,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346752492] [2021-06-05 15:08:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:44,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:44,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346752492] [2021-06-05 15:08:44,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346752492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:44,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080350856] [2021-06-05 15:08:44,066 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:44,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:44,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:44,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:44,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:44,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:44,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:08:44,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:44,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:44,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:44,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:08:44,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:44,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080350856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:44,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:44,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:08:44,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442219192] [2021-06-05 15:08:44,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:44,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:44,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:44,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:44,344 INFO L87 Difference]: Start difference. First operand 1726 states and 6053 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:46,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:46,213 INFO L93 Difference]: Finished difference Result 2452 states and 8252 transitions. [2021-06-05 15:08:46,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:08:46,213 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:46,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:46,217 INFO L225 Difference]: With dead ends: 2452 [2021-06-05 15:08:46,217 INFO L226 Difference]: Without dead ends: 2401 [2021-06-05 15:08:46,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1644.8ms TimeCoverageRelationStatistics Valid=551, Invalid=2989, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:08:46,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2401 states. [2021-06-05 15:08:46,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2401 to 1748. [2021-06-05 15:08:46,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1748 states, 1747 states have (on average 3.5060103033772183) internal successors, (6125), 1747 states have internal predecessors, (6125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:46,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1748 states to 1748 states and 6125 transitions. [2021-06-05 15:08:46,240 INFO L78 Accepts]: Start accepts. Automaton has 1748 states and 6125 transitions. Word has length 24 [2021-06-05 15:08:46,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:46,240 INFO L482 AbstractCegarLoop]: Abstraction has 1748 states and 6125 transitions. [2021-06-05 15:08:46,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:46,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1748 states and 6125 transitions. [2021-06-05 15:08:46,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:46,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:46,242 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:46,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:46,443 INFO L430 AbstractCegarLoop]: === Iteration 199 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:46,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:46,443 INFO L82 PathProgramCache]: Analyzing trace with hash -96000760, now seen corresponding path program 84 times [2021-06-05 15:08:46,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:46,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591353157] [2021-06-05 15:08:46,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:46,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:46,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591353157] [2021-06-05 15:08:46,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591353157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:46,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276161237] [2021-06-05 15:08:46,655 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:46,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:08:46,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:46,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:46,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:46,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:46,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:46,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:08:46,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:46,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:46,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:46,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:08:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:46,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276161237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:46,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:46,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:08:46,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869762252] [2021-06-05 15:08:46,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:46,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:46,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:46,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:46,907 INFO L87 Difference]: Start difference. First operand 1748 states and 6125 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:49,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:49,428 INFO L93 Difference]: Finished difference Result 2604 states and 8741 transitions. [2021-06-05 15:08:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:08:49,429 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:49,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:49,433 INFO L225 Difference]: With dead ends: 2604 [2021-06-05 15:08:49,433 INFO L226 Difference]: Without dead ends: 2546 [2021-06-05 15:08:49,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 2044.7ms TimeCoverageRelationStatistics Valid=752, Invalid=3940, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:08:49,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-06-05 15:08:49,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 1755. [2021-06-05 15:08:49,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1754 states have (on average 3.506841505131129) internal successors, (6151), 1754 states have internal predecessors, (6151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 6151 transitions. [2021-06-05 15:08:49,460 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 6151 transitions. Word has length 24 [2021-06-05 15:08:49,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:49,460 INFO L482 AbstractCegarLoop]: Abstraction has 1755 states and 6151 transitions. [2021-06-05 15:08:49,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 6151 transitions. [2021-06-05 15:08:49,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:49,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:49,463 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:49,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-06-05 15:08:49,663 INFO L430 AbstractCegarLoop]: === Iteration 200 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:49,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:49,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1124150620, now seen corresponding path program 85 times [2021-06-05 15:08:49,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:49,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073782489] [2021-06-05 15:08:49,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:49,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:49,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:49,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:49,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073782489] [2021-06-05 15:08:49,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073782489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:49,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333504924] [2021-06-05 15:08:49,833 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:49,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:49,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:49,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:08:49,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:49,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:49,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:49,977 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:08:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:50,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333504924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:50,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:50,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:08:50,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997037394] [2021-06-05 15:08:50,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:08:50,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:50,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:08:50,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:08:50,022 INFO L87 Difference]: Start difference. First operand 1755 states and 6151 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:51,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:51,720 INFO L93 Difference]: Finished difference Result 2476 states and 8372 transitions. [2021-06-05 15:08:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:08:51,721 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:51,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:51,724 INFO L225 Difference]: With dead ends: 2476 [2021-06-05 15:08:51,724 INFO L226 Difference]: Without dead ends: 2434 [2021-06-05 15:08:51,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1466.7ms TimeCoverageRelationStatistics Valid=536, Invalid=2544, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:08:51,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-06-05 15:08:51,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 1765. [2021-06-05 15:08:51,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1765 states, 1764 states have (on average 3.5051020408163267) internal successors, (6183), 1764 states have internal predecessors, (6183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:51,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1765 states to 1765 states and 6183 transitions. [2021-06-05 15:08:51,746 INFO L78 Accepts]: Start accepts. Automaton has 1765 states and 6183 transitions. Word has length 24 [2021-06-05 15:08:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:51,746 INFO L482 AbstractCegarLoop]: Abstraction has 1765 states and 6183 transitions. [2021-06-05 15:08:51,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1765 states and 6183 transitions. [2021-06-05 15:08:51,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:51,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:51,749 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:51,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 15:08:51,950 INFO L430 AbstractCegarLoop]: === Iteration 201 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:51,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:51,950 INFO L82 PathProgramCache]: Analyzing trace with hash -800564442, now seen corresponding path program 86 times [2021-06-05 15:08:51,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:51,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021059518] [2021-06-05 15:08:51,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:52,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:52,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021059518] [2021-06-05 15:08:52,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021059518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:52,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716819037] [2021-06-05 15:08:52,117 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:52,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:52,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:52,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:08:52,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:52,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:52,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:08:52,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:52,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:52,278 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:52,278 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:08:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:52,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716819037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:52,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:52,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:08:52,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207660712] [2021-06-05 15:08:52,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:08:52,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:52,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:08:52,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:08:52,369 INFO L87 Difference]: Start difference. First operand 1765 states and 6183 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:54,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:54,662 INFO L93 Difference]: Finished difference Result 2476 states and 8307 transitions. [2021-06-05 15:08:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-06-05 15:08:54,663 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:54,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:54,666 INFO L225 Difference]: With dead ends: 2476 [2021-06-05 15:08:54,666 INFO L226 Difference]: Without dead ends: 2436 [2021-06-05 15:08:54,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 1945.5ms TimeCoverageRelationStatistics Valid=639, Invalid=3393, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:08:54,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-06-05 15:08:54,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1773. [2021-06-05 15:08:54,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1773 states, 1772 states have (on average 3.505079006772009) internal successors, (6211), 1772 states have internal predecessors, (6211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1773 states to 1773 states and 6211 transitions. [2021-06-05 15:08:54,690 INFO L78 Accepts]: Start accepts. Automaton has 1773 states and 6211 transitions. Word has length 24 [2021-06-05 15:08:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:54,690 INFO L482 AbstractCegarLoop]: Abstraction has 1773 states and 6211 transitions. [2021-06-05 15:08:54,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:54,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1773 states and 6211 transitions. [2021-06-05 15:08:54,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:54,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:54,693 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:54,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable335 [2021-06-05 15:08:54,895 INFO L430 AbstractCegarLoop]: === Iteration 202 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:54,895 INFO L82 PathProgramCache]: Analyzing trace with hash 885179680, now seen corresponding path program 87 times [2021-06-05 15:08:54,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:54,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535442041] [2021-06-05 15:08:54,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:55,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:55,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535442041] [2021-06-05 15:08:55,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535442041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:55,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845760340] [2021-06-05 15:08:55,051 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:55,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:08:55,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:55,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:55,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:55,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:08:55,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:55,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:55,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:55,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:08:55,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:55,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845760340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:55,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:55,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:08:55,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028018223] [2021-06-05 15:08:55,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:08:55,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:55,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:08:55,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:08:55,239 INFO L87 Difference]: Start difference. First operand 1773 states and 6211 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:56,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:56,765 INFO L93 Difference]: Finished difference Result 2331 states and 7931 transitions. [2021-06-05 15:08:56,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 15:08:56,765 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:08:56,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:56,769 INFO L225 Difference]: With dead ends: 2331 [2021-06-05 15:08:56,769 INFO L226 Difference]: Without dead ends: 2310 [2021-06-05 15:08:56,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1244.7ms TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:08:56,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2021-06-05 15:08:56,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1760. [2021-06-05 15:08:56,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1760 states, 1759 states have (on average 3.505969300739056) internal successors, (6167), 1759 states have internal predecessors, (6167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1760 states to 1760 states and 6167 transitions. [2021-06-05 15:08:56,805 INFO L78 Accepts]: Start accepts. Automaton has 1760 states and 6167 transitions. Word has length 24 [2021-06-05 15:08:56,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:56,805 INFO L482 AbstractCegarLoop]: Abstraction has 1760 states and 6167 transitions. [2021-06-05 15:08:56,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:56,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1760 states and 6167 transitions. [2021-06-05 15:08:56,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:08:56,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:56,808 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:57,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-05 15:08:57,008 INFO L430 AbstractCegarLoop]: === Iteration 203 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:08:57,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:57,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1344157466, now seen corresponding path program 81 times [2021-06-05 15:08:57,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:57,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266807483] [2021-06-05 15:08:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:57,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:57,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:57,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266807483] [2021-06-05 15:08:57,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266807483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:57,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341950339] [2021-06-05 15:08:57,165 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 15:08:57,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:08:57,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:57,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:08:57,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:57,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:57,345 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:57,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-05 15:08:57,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:57,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:57,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:57,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:350 [2021-06-05 15:08:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:57,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341950339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:57,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:57,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:08:57,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241701017] [2021-06-05 15:08:57,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:08:57,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:57,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:08:57,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:08:57,705 INFO L87 Difference]: Start difference. First operand 1760 states and 6167 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:58,366 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 39 [2021-06-05 15:08:58,514 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2021-06-05 15:09:00,697 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 36 [2021-06-05 15:09:01,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:01,352 INFO L93 Difference]: Finished difference Result 3383 states and 11252 transitions. [2021-06-05 15:09:01,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 15:09:01,353 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:01,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:01,358 INFO L225 Difference]: With dead ends: 3383 [2021-06-05 15:09:01,358 INFO L226 Difference]: Without dead ends: 3356 [2021-06-05 15:09:01,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 3299.9ms TimeCoverageRelationStatistics Valid=1107, Invalid=5373, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 15:09:01,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3356 states. [2021-06-05 15:09:01,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3356 to 1826. [2021-06-05 15:09:01,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1826 states, 1825 states have (on average 3.530958904109589) internal successors, (6444), 1825 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:01,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1826 states to 1826 states and 6444 transitions. [2021-06-05 15:09:01,387 INFO L78 Accepts]: Start accepts. Automaton has 1826 states and 6444 transitions. Word has length 24 [2021-06-05 15:09:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:01,387 INFO L482 AbstractCegarLoop]: Abstraction has 1826 states and 6444 transitions. [2021-06-05 15:09:01,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:01,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1826 states and 6444 transitions. [2021-06-05 15:09:01,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:01,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:01,390 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:01,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:01,590 INFO L430 AbstractCegarLoop]: === Iteration 204 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:01,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:01,590 INFO L82 PathProgramCache]: Analyzing trace with hash -446703708, now seen corresponding path program 82 times [2021-06-05 15:09:01,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:01,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976824397] [2021-06-05 15:09:01,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:01,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:01,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976824397] [2021-06-05 15:09:01,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976824397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:01,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030027648] [2021-06-05 15:09:01,751 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 15:09:01,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:01,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:01,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:01,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:01,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:09:01,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:01,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:01,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:01,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:09:01,979 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:01,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030027648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:01,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:01,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:09:01,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325177595] [2021-06-05 15:09:01,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:01,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:01,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:01,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:01,980 INFO L87 Difference]: Start difference. First operand 1826 states and 6444 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:04,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:04,514 INFO L93 Difference]: Finished difference Result 3469 states and 11530 transitions. [2021-06-05 15:09:04,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 15:09:04,515 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:04,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:04,520 INFO L225 Difference]: With dead ends: 3469 [2021-06-05 15:09:04,520 INFO L226 Difference]: Without dead ends: 3411 [2021-06-05 15:09:04,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2250 ImplicationChecksByTransitivity, 2142.1ms TimeCoverageRelationStatistics Valid=1048, Invalid=5432, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 15:09:04,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-05 15:09:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 1859. [2021-06-05 15:09:04,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 3.5441334768568353) internal successors, (6585), 1858 states have internal predecessors, (6585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:04,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 6585 transitions. [2021-06-05 15:09:04,549 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 6585 transitions. Word has length 24 [2021-06-05 15:09:04,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:04,549 INFO L482 AbstractCegarLoop]: Abstraction has 1859 states and 6585 transitions. [2021-06-05 15:09:04,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:04,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 6585 transitions. [2021-06-05 15:09:04,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:04,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:04,552 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:04,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:04,752 INFO L430 AbstractCegarLoop]: === Iteration 205 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:04,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:04,753 INFO L82 PathProgramCache]: Analyzing trace with hash -713337392, now seen corresponding path program 88 times [2021-06-05 15:09:04,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:04,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405098176] [2021-06-05 15:09:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:04,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:04,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405098176] [2021-06-05 15:09:04,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405098176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:04,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126779182] [2021-06-05 15:09:04,895 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:04,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:04,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:04,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:04,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:05,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:09:05,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:05,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:05,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:05,039 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:09:05,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:05,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126779182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:05,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:05,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:09:05,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010616168] [2021-06-05 15:09:05,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:05,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:05,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:05,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:05,087 INFO L87 Difference]: Start difference. First operand 1859 states and 6585 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:07,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:07,431 INFO L93 Difference]: Finished difference Result 3517 states and 11694 transitions. [2021-06-05 15:09:07,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 15:09:07,432 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:07,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:07,437 INFO L225 Difference]: With dead ends: 3517 [2021-06-05 15:09:07,437 INFO L226 Difference]: Without dead ends: 3467 [2021-06-05 15:09:07,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1885.9ms TimeCoverageRelationStatistics Valid=938, Invalid=4318, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 15:09:07,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3467 states. [2021-06-05 15:09:07,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3467 to 1918. [2021-06-05 15:09:07,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.5701617110067816) internal successors, (6844), 1917 states have internal predecessors, (6844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 6844 transitions. [2021-06-05 15:09:07,469 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 6844 transitions. Word has length 24 [2021-06-05 15:09:07,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:07,469 INFO L482 AbstractCegarLoop]: Abstraction has 1918 states and 6844 transitions. [2021-06-05 15:09:07,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:07,469 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 6844 transitions. [2021-06-05 15:09:07,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:07,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:07,472 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:07,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:07,672 INFO L430 AbstractCegarLoop]: === Iteration 206 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:07,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:07,672 INFO L82 PathProgramCache]: Analyzing trace with hash -389751214, now seen corresponding path program 89 times [2021-06-05 15:09:07,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:07,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349965978] [2021-06-05 15:09:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:07,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:07,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:07,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349965978] [2021-06-05 15:09:07,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349965978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:07,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058193539] [2021-06-05 15:09:07,819 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:07,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:09:07,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:07,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:07,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:07,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:09:07,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:07,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:07,980 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:07,980 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:09:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:08,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058193539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:08,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:08,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:09:08,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434031181] [2021-06-05 15:09:08,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:08,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:08,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:08,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:08,027 INFO L87 Difference]: Start difference. First operand 1918 states and 6844 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:10,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:10,090 INFO L93 Difference]: Finished difference Result 3345 states and 11284 transitions. [2021-06-05 15:09:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 15:09:10,090 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:10,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:10,095 INFO L225 Difference]: With dead ends: 3345 [2021-06-05 15:09:10,095 INFO L226 Difference]: Without dead ends: 3302 [2021-06-05 15:09:10,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 1709.8ms TimeCoverageRelationStatistics Valid=813, Invalid=3879, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:09:10,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2021-06-05 15:09:10,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 1924. [2021-06-05 15:09:10,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 3.578263130525221) internal successors, (6881), 1923 states have internal predecessors, (6881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 6881 transitions. [2021-06-05 15:09:10,142 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 6881 transitions. Word has length 24 [2021-06-05 15:09:10,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:10,142 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 6881 transitions. [2021-06-05 15:09:10,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 6881 transitions. [2021-06-05 15:09:10,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:10,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:10,145 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:10,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable352 [2021-06-05 15:09:10,346 INFO L430 AbstractCegarLoop]: === Iteration 207 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:10,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:10,346 INFO L82 PathProgramCache]: Analyzing trace with hash 147171454, now seen corresponding path program 83 times [2021-06-05 15:09:10,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:10,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203754544] [2021-06-05 15:09:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:10,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:10,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:10,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203754544] [2021-06-05 15:09:10,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203754544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:10,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178489327] [2021-06-05 15:09:10,508 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:10,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:09:10,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:10,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:10,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:10,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:10,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:10,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:10,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:10,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:09:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:10,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178489327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:10,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:10,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:09:10,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842850047] [2021-06-05 15:09:10,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:10,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:10,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:10,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:10,703 INFO L87 Difference]: Start difference. First operand 1924 states and 6881 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:13,184 INFO L93 Difference]: Finished difference Result 3554 states and 12008 transitions. [2021-06-05 15:09:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 15:09:13,185 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:13,190 INFO L225 Difference]: With dead ends: 3554 [2021-06-05 15:09:13,190 INFO L226 Difference]: Without dead ends: 3506 [2021-06-05 15:09:13,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1602 ImplicationChecksByTransitivity, 1972.3ms TimeCoverageRelationStatistics Valid=855, Invalid=3975, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 15:09:13,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2021-06-05 15:09:13,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 1958. [2021-06-05 15:09:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1958 states, 1957 states have (on average 3.601430761369443) internal successors, (7048), 1957 states have internal predecessors, (7048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:13,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1958 states to 1958 states and 7048 transitions. [2021-06-05 15:09:13,223 INFO L78 Accepts]: Start accepts. Automaton has 1958 states and 7048 transitions. Word has length 24 [2021-06-05 15:09:13,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:13,223 INFO L482 AbstractCegarLoop]: Abstraction has 1958 states and 7048 transitions. [2021-06-05 15:09:13,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:13,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1958 states and 7048 transitions. [2021-06-05 15:09:13,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:13,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:13,225 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:13,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2021-06-05 15:09:13,426 INFO L430 AbstractCegarLoop]: === Iteration 208 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:13,426 INFO L82 PathProgramCache]: Analyzing trace with hash -57746680, now seen corresponding path program 90 times [2021-06-05 15:09:13,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:13,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866765205] [2021-06-05 15:09:13,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:13,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:13,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866765205] [2021-06-05 15:09:13,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866765205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:13,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143242547] [2021-06-05 15:09:13,581 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:13,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:09:13,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:13,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:13,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:13,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:13,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:09:13,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:13,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:13,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:13,755 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 15:09:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:13,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143242547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:13,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:13,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:09:13,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139216226] [2021-06-05 15:09:13,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:13,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:13,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:13,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:13,827 INFO L87 Difference]: Start difference. First operand 1958 states and 7048 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:16,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:16,765 INFO L93 Difference]: Finished difference Result 3437 states and 11640 transitions. [2021-06-05 15:09:16,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:09:16,765 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:16,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:16,771 INFO L225 Difference]: With dead ends: 3437 [2021-06-05 15:09:16,771 INFO L226 Difference]: Without dead ends: 3407 [2021-06-05 15:09:16,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 2520.2ms TimeCoverageRelationStatistics Valid=1021, Invalid=4831, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 15:09:16,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3407 states. [2021-06-05 15:09:16,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3407 to 1969. [2021-06-05 15:09:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.608739837398374) internal successors, (7102), 1968 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:16,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 7102 transitions. [2021-06-05 15:09:16,802 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 7102 transitions. Word has length 24 [2021-06-05 15:09:16,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:16,802 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 7102 transitions. [2021-06-05 15:09:16,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:16,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 7102 transitions. [2021-06-05 15:09:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:16,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:16,805 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:17,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 15:09:17,005 INFO L430 AbstractCegarLoop]: === Iteration 209 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:17,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1627997442, now seen corresponding path program 91 times [2021-06-05 15:09:17,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:17,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400349413] [2021-06-05 15:09:17,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:17,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:17,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:17,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400349413] [2021-06-05 15:09:17,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400349413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:17,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476691283] [2021-06-05 15:09:17,158 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:17,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:17,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:17,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:17,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:17,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:17,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:17,313 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:09:17,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:17,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476691283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:17,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:17,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:09:17,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767118145] [2021-06-05 15:09:17,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:09:17,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:17,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:09:17,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:09:17,343 INFO L87 Difference]: Start difference. First operand 1969 states and 7102 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:19,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:19,547 INFO L93 Difference]: Finished difference Result 3267 states and 11097 transitions. [2021-06-05 15:09:19,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:09:19,547 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:19,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:19,554 INFO L225 Difference]: With dead ends: 3267 [2021-06-05 15:09:19,554 INFO L226 Difference]: Without dead ends: 3232 [2021-06-05 15:09:19,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1612.6ms TimeCoverageRelationStatistics Valid=656, Invalid=3004, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:09:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2021-06-05 15:09:19,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 1969. [2021-06-05 15:09:19,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.608739837398374) internal successors, (7102), 1968 states have internal predecessors, (7102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:19,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 7102 transitions. [2021-06-05 15:09:19,598 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 7102 transitions. Word has length 24 [2021-06-05 15:09:19,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:19,598 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 7102 transitions. [2021-06-05 15:09:19,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:19,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 7102 transitions. [2021-06-05 15:09:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:19,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:19,601 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:19,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable357 [2021-06-05 15:09:19,823 INFO L430 AbstractCegarLoop]: === Iteration 210 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:19,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:19,823 INFO L82 PathProgramCache]: Analyzing trace with hash -634589398, now seen corresponding path program 92 times [2021-06-05 15:09:19,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:19,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894320722] [2021-06-05 15:09:19,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:20,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:20,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894320722] [2021-06-05 15:09:20,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894320722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:20,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795241283] [2021-06-05 15:09:20,056 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:20,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:20,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:20,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:20,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:20,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:20,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:20,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:20,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:20,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:20,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:20,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:09:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:20,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795241283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:20,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:20,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:09:20,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4208043] [2021-06-05 15:09:20,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:09:20,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:20,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:09:20,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:09:20,411 INFO L87 Difference]: Start difference. First operand 1969 states and 7102 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:21,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:21,366 INFO L93 Difference]: Finished difference Result 2469 states and 8641 transitions. [2021-06-05 15:09:21,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:09:21,367 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:21,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:21,370 INFO L225 Difference]: With dead ends: 2469 [2021-06-05 15:09:21,370 INFO L226 Difference]: Without dead ends: 2460 [2021-06-05 15:09:21,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 868.8ms TimeCoverageRelationStatistics Valid=248, Invalid=1474, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:09:21,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2021-06-05 15:09:21,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 1973. [2021-06-05 15:09:21,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1973 states, 1972 states have (on average 3.6080121703853956) internal successors, (7115), 1972 states have internal predecessors, (7115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:21,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1973 states to 1973 states and 7115 transitions. [2021-06-05 15:09:21,395 INFO L78 Accepts]: Start accepts. Automaton has 1973 states and 7115 transitions. Word has length 24 [2021-06-05 15:09:21,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:21,395 INFO L482 AbstractCegarLoop]: Abstraction has 1973 states and 7115 transitions. [2021-06-05 15:09:21,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:21,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1973 states and 7115 transitions. [2021-06-05 15:09:21,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:21,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:21,398 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:21,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:21,599 INFO L430 AbstractCegarLoop]: === Iteration 211 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:21,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:21,599 INFO L82 PathProgramCache]: Analyzing trace with hash -844126778, now seen corresponding path program 93 times [2021-06-05 15:09:21,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:21,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830947799] [2021-06-05 15:09:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:22,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:22,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830947799] [2021-06-05 15:09:22,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830947799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:22,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779232525] [2021-06-05 15:09:22,001 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:22,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:09:22,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:22,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:22,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:22,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:22,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:22,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:22,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:22,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:09:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:22,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779232525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:22,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:22,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:09:22,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077646247] [2021-06-05 15:09:22,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:22,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:22,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:22,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:22,410 INFO L87 Difference]: Start difference. First operand 1973 states and 7115 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:23,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:23,689 INFO L93 Difference]: Finished difference Result 2516 states and 8793 transitions. [2021-06-05 15:09:23,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:09:23,689 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:23,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:23,693 INFO L225 Difference]: With dead ends: 2516 [2021-06-05 15:09:23,693 INFO L226 Difference]: Without dead ends: 2497 [2021-06-05 15:09:23,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1299.1ms TimeCoverageRelationStatistics Valid=289, Invalid=1603, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:09:23,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-05 15:09:23,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1976. [2021-06-05 15:09:23,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1976 states, 1975 states have (on average 3.607594936708861) internal successors, (7125), 1975 states have internal predecessors, (7125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:23,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1976 states to 1976 states and 7125 transitions. [2021-06-05 15:09:23,720 INFO L78 Accepts]: Start accepts. Automaton has 1976 states and 7125 transitions. Word has length 24 [2021-06-05 15:09:23,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:23,720 INFO L482 AbstractCegarLoop]: Abstraction has 1976 states and 7125 transitions. [2021-06-05 15:09:23,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1976 states and 7125 transitions. [2021-06-05 15:09:23,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:23,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:23,722 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:23,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2021-06-05 15:09:23,923 INFO L430 AbstractCegarLoop]: === Iteration 212 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:23,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:23,923 INFO L82 PathProgramCache]: Analyzing trace with hash 884544968, now seen corresponding path program 94 times [2021-06-05 15:09:23,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:23,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380269648] [2021-06-05 15:09:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:24,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:24,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:24,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380269648] [2021-06-05 15:09:24,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380269648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:24,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49360704] [2021-06-05 15:09:24,184 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:24,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:24,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:24,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:24,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:24,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:24,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:24,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:24,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:24,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:09:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:24,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49360704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:24,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:24,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:09:24,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073918278] [2021-06-05 15:09:24,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:24,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:24,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:24,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:24,479 INFO L87 Difference]: Start difference. First operand 1976 states and 7125 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:25,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:25,783 INFO L93 Difference]: Finished difference Result 2478 states and 8683 transitions. [2021-06-05 15:09:25,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:09:25,784 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:25,787 INFO L225 Difference]: With dead ends: 2478 [2021-06-05 15:09:25,788 INFO L226 Difference]: Without dead ends: 2459 [2021-06-05 15:09:25,788 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1196.0ms TimeCoverageRelationStatistics Valid=282, Invalid=1524, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:09:25,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-06-05 15:09:25,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1979. [2021-06-05 15:09:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1978 states have (on average 3.6071789686552074) internal successors, (7135), 1978 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:25,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 7135 transitions. [2021-06-05 15:09:25,812 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 7135 transitions. Word has length 24 [2021-06-05 15:09:25,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:25,812 INFO L482 AbstractCegarLoop]: Abstraction has 1979 states and 7135 transitions. [2021-06-05 15:09:25,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:25,812 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 7135 transitions. [2021-06-05 15:09:25,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:25,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:25,815 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:26,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:26,015 INFO L430 AbstractCegarLoop]: === Iteration 213 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:26,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:26,016 INFO L82 PathProgramCache]: Analyzing trace with hash -143604892, now seen corresponding path program 95 times [2021-06-05 15:09:26,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:26,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544138637] [2021-06-05 15:09:26,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:26,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:26,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544138637] [2021-06-05 15:09:26,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544138637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:26,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524667580] [2021-06-05 15:09:26,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:26,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:09:26,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:26,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:26,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:26,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:09:26,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:26,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:26,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:26,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:09:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:26,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524667580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:26,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:26,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:09:26,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372167347] [2021-06-05 15:09:26,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:26,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:26,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:26,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:26,478 INFO L87 Difference]: Start difference. First operand 1979 states and 7135 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:27,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:27,564 INFO L93 Difference]: Finished difference Result 2450 states and 8602 transitions. [2021-06-05 15:09:27,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:09:27,565 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:27,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:27,569 INFO L225 Difference]: With dead ends: 2450 [2021-06-05 15:09:27,569 INFO L226 Difference]: Without dead ends: 2441 [2021-06-05 15:09:27,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 925.6ms TimeCoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:09:27,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2021-06-05 15:09:27,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 1982. [2021-06-05 15:09:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1981 states have (on average 3.606764260474508) internal successors, (7145), 1981 states have internal predecessors, (7145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 7145 transitions. [2021-06-05 15:09:27,605 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 7145 transitions. Word has length 24 [2021-06-05 15:09:27,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:27,605 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 7145 transitions. [2021-06-05 15:09:27,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:27,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 7145 transitions. [2021-06-05 15:09:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:27,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:27,608 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:27,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:27,829 INFO L430 AbstractCegarLoop]: === Iteration 214 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:27,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:27,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1865725408, now seen corresponding path program 96 times [2021-06-05 15:09:27,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:27,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495741866] [2021-06-05 15:09:27,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:28,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:28,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:28,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495741866] [2021-06-05 15:09:28,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495741866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:28,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750720848] [2021-06-05 15:09:28,036 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:28,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:09:28,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:28,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:09:28,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:28,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:28,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:28,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:28,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:09:28,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:28,266 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:28,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 15:09:28,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:118 [2021-06-05 15:09:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:28,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750720848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:28,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:28,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 15:09:28,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447040838] [2021-06-05 15:09:28,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:28,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:28,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:28,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:28,385 INFO L87 Difference]: Start difference. First operand 1982 states and 7145 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:29,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:29,448 INFO L93 Difference]: Finished difference Result 2366 states and 8334 transitions. [2021-06-05 15:09:29,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:09:29,448 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:29,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:29,452 INFO L225 Difference]: With dead ends: 2366 [2021-06-05 15:09:29,452 INFO L226 Difference]: Without dead ends: 2353 [2021-06-05 15:09:29,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1021.2ms TimeCoverageRelationStatistics Valid=300, Invalid=1592, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:09:29,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2353 states. [2021-06-05 15:09:29,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2353 to 1974. [2021-06-05 15:09:29,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.6097313735428282) internal successors, (7122), 1973 states have internal predecessors, (7122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7122 transitions. [2021-06-05 15:09:29,476 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7122 transitions. Word has length 24 [2021-06-05 15:09:29,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:29,476 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7122 transitions. [2021-06-05 15:09:29,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:29,476 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7122 transitions. [2021-06-05 15:09:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:29,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:29,478 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:29,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:29,679 INFO L430 AbstractCegarLoop]: === Iteration 215 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:29,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:29,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1334997500, now seen corresponding path program 97 times [2021-06-05 15:09:29,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:29,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635689573] [2021-06-05 15:09:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:29,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:29,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:29,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635689573] [2021-06-05 15:09:29,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635689573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:29,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795484346] [2021-06-05 15:09:29,937 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:29,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:29,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:30,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:09:30,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:30,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:30,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:30,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:09:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:30,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795484346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:30,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:30,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:09:30,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035015813] [2021-06-05 15:09:30,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:30,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:30,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:30,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:30,151 INFO L87 Difference]: Start difference. First operand 1974 states and 7122 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:30,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:30,854 INFO L93 Difference]: Finished difference Result 2438 states and 8561 transitions. [2021-06-05 15:09:30,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:09:30,855 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:30,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:30,858 INFO L225 Difference]: With dead ends: 2438 [2021-06-05 15:09:30,858 INFO L226 Difference]: Without dead ends: 2429 [2021-06-05 15:09:30,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 693.2ms TimeCoverageRelationStatistics Valid=225, Invalid=1107, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:09:30,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2429 states. [2021-06-05 15:09:30,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2429 to 1963. [2021-06-05 15:09:30,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.610091743119266) internal successors, (7083), 1962 states have internal predecessors, (7083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 7083 transitions. [2021-06-05 15:09:30,884 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 7083 transitions. Word has length 24 [2021-06-05 15:09:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:30,884 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 7083 transitions. [2021-06-05 15:09:30,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:30,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 7083 transitions. [2021-06-05 15:09:30,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:30,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:30,887 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:31,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:31,087 INFO L430 AbstractCegarLoop]: === Iteration 216 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:31,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:31,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1948206298, now seen corresponding path program 98 times [2021-06-05 15:09:31,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:31,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577871354] [2021-06-05 15:09:31,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:31,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:31,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577871354] [2021-06-05 15:09:31,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577871354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:31,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788053224] [2021-06-05 15:09:31,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:31,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:31,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:31,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:31,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:31,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:31,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:31,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:31,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:31,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:31,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:31,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:09:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:31,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788053224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:31,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:31,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:09:31,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428595671] [2021-06-05 15:09:31,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:09:31,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:31,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:09:31,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:09:31,603 INFO L87 Difference]: Start difference. First operand 1963 states and 7083 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:32,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:32,505 INFO L93 Difference]: Finished difference Result 2495 states and 8710 transitions. [2021-06-05 15:09:32,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:09:32,505 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:32,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:32,508 INFO L225 Difference]: With dead ends: 2495 [2021-06-05 15:09:32,509 INFO L226 Difference]: Without dead ends: 2486 [2021-06-05 15:09:32,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 797.2ms TimeCoverageRelationStatistics Valid=234, Invalid=1326, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:09:32,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2021-06-05 15:09:32,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 1963. [2021-06-05 15:09:32,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 3.610091743119266) internal successors, (7083), 1962 states have internal predecessors, (7083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:32,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 7083 transitions. [2021-06-05 15:09:32,534 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 7083 transitions. Word has length 24 [2021-06-05 15:09:32,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:32,534 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 7083 transitions. [2021-06-05 15:09:32,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:32,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 7083 transitions. [2021-06-05 15:09:32,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:32,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:32,536 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:32,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:32,737 INFO L430 AbstractCegarLoop]: === Iteration 217 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:32,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:32,737 INFO L82 PathProgramCache]: Analyzing trace with hash 440124240, now seen corresponding path program 99 times [2021-06-05 15:09:32,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:32,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060988748] [2021-06-05 15:09:32,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:32,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:32,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060988748] [2021-06-05 15:09:32,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060988748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:32,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863899115] [2021-06-05 15:09:32,947 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:32,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:09:32,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:32,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:32,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:33,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:33,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:33,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:33,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:33,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:33,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:33,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:09:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:33,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863899115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:33,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:33,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:09:33,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941375162] [2021-06-05 15:09:33,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:09:33,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:33,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:09:33,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:09:33,228 INFO L87 Difference]: Start difference. First operand 1963 states and 7083 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:34,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:34,194 INFO L93 Difference]: Finished difference Result 2517 states and 8781 transitions. [2021-06-05 15:09:34,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:09:34,195 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:34,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:34,198 INFO L225 Difference]: With dead ends: 2517 [2021-06-05 15:09:34,198 INFO L226 Difference]: Without dead ends: 2507 [2021-06-05 15:09:34,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 793.3ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:09:34,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2021-06-05 15:09:34,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1967. [2021-06-05 15:09:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1967 states, 1966 states have (on average 3.608850457782299) internal successors, (7095), 1966 states have internal predecessors, (7095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1967 states to 1967 states and 7095 transitions. [2021-06-05 15:09:34,223 INFO L78 Accepts]: Start accepts. Automaton has 1967 states and 7095 transitions. Word has length 24 [2021-06-05 15:09:34,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:34,223 INFO L482 AbstractCegarLoop]: Abstraction has 1967 states and 7095 transitions. [2021-06-05 15:09:34,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:34,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1967 states and 7095 transitions. [2021-06-05 15:09:34,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:34,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:34,225 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:34,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:34,426 INFO L430 AbstractCegarLoop]: === Iteration 218 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:34,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1918599544, now seen corresponding path program 100 times [2021-06-05 15:09:34,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:34,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177161390] [2021-06-05 15:09:34,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:34,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:34,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177161390] [2021-06-05 15:09:34,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177161390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:34,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667647084] [2021-06-05 15:09:34,631 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:34,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:34,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:34,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:34,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:34,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:34,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:34,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:34,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:34,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:09:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:34,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667647084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:34,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:34,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:09:34,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760426313] [2021-06-05 15:09:34,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:34,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:34,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:34,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:34,858 INFO L87 Difference]: Start difference. First operand 1967 states and 7095 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:35,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:35,802 INFO L93 Difference]: Finished difference Result 2507 states and 8780 transitions. [2021-06-05 15:09:35,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:09:35,802 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:35,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:35,806 INFO L225 Difference]: With dead ends: 2507 [2021-06-05 15:09:35,806 INFO L226 Difference]: Without dead ends: 2497 [2021-06-05 15:09:35,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 817.7ms TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:09:35,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2497 states. [2021-06-05 15:09:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2497 to 1966. [2021-06-05 15:09:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1965 states have (on average 3.6106870229007635) internal successors, (7095), 1965 states have internal predecessors, (7095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 7095 transitions. [2021-06-05 15:09:35,831 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 7095 transitions. Word has length 24 [2021-06-05 15:09:35,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:35,831 INFO L482 AbstractCegarLoop]: Abstraction has 1966 states and 7095 transitions. [2021-06-05 15:09:35,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:35,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 7095 transitions. [2021-06-05 15:09:35,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:35,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:35,834 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:36,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable374 [2021-06-05 15:09:36,034 INFO L430 AbstractCegarLoop]: === Iteration 219 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:36,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:36,035 INFO L82 PathProgramCache]: Analyzing trace with hash -2095140976, now seen corresponding path program 101 times [2021-06-05 15:09:36,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:36,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068456017] [2021-06-05 15:09:36,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:36,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:36,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068456017] [2021-06-05 15:09:36,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068456017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:36,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476399660] [2021-06-05 15:09:36,204 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:36,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:09:36,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:36,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:36,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:36,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:09:36,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:36,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:36,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:36,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:09:36,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:36,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476399660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:36,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:36,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:09:36,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889363861] [2021-06-05 15:09:36,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:36,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:36,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:36,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:36,400 INFO L87 Difference]: Start difference. First operand 1966 states and 7095 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:37,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:37,354 INFO L93 Difference]: Finished difference Result 2493 states and 8734 transitions. [2021-06-05 15:09:37,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:09:37,355 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:37,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:37,358 INFO L225 Difference]: With dead ends: 2493 [2021-06-05 15:09:37,358 INFO L226 Difference]: Without dead ends: 2484 [2021-06-05 15:09:37,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 821.4ms TimeCoverageRelationStatistics Valid=286, Invalid=1520, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:09:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2021-06-05 15:09:37,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 1969. [2021-06-05 15:09:37,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.609247967479675) internal successors, (7103), 1968 states have internal predecessors, (7103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 7103 transitions. [2021-06-05 15:09:37,390 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 7103 transitions. Word has length 24 [2021-06-05 15:09:37,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:37,390 INFO L482 AbstractCegarLoop]: Abstraction has 1969 states and 7103 transitions. [2021-06-05 15:09:37,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 7103 transitions. [2021-06-05 15:09:37,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:37,392 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:37,392 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:37,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-05 15:09:37,593 INFO L430 AbstractCegarLoop]: === Iteration 220 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:37,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:37,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1366087880, now seen corresponding path program 102 times [2021-06-05 15:09:37,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:37,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698872878] [2021-06-05 15:09:37,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:37,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:37,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:37,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698872878] [2021-06-05 15:09:37,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698872878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:37,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312306223] [2021-06-05 15:09:37,775 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:37,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:09:37,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:37,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:37,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:37,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:37,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:09:37,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:37,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:37,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:37,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:09:38,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:38,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312306223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:38,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:38,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:09:38,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738881854] [2021-06-05 15:09:38,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:38,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:38,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:38,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:38,039 INFO L87 Difference]: Start difference. First operand 1969 states and 7103 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:39,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:39,349 INFO L93 Difference]: Finished difference Result 2601 states and 8996 transitions. [2021-06-05 15:09:39,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:09:39,350 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:39,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:39,354 INFO L225 Difference]: With dead ends: 2601 [2021-06-05 15:09:39,354 INFO L226 Difference]: Without dead ends: 2582 [2021-06-05 15:09:39,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1176.8ms TimeCoverageRelationStatistics Valid=378, Invalid=1974, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:09:39,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2582 states. [2021-06-05 15:09:39,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2582 to 1974. [2021-06-05 15:09:39,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.6117587430309173) internal successors, (7126), 1973 states have internal predecessors, (7126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7126 transitions. [2021-06-05 15:09:39,380 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7126 transitions. Word has length 24 [2021-06-05 15:09:39,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:39,380 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7126 transitions. [2021-06-05 15:09:39,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:39,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7126 transitions. [2021-06-05 15:09:39,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:39,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:39,383 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:39,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 15:09:39,583 INFO L430 AbstractCegarLoop]: === Iteration 221 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:39,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:39,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2147045616, now seen corresponding path program 103 times [2021-06-05 15:09:39,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:39,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736233503] [2021-06-05 15:09:39,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:39,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:39,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736233503] [2021-06-05 15:09:39,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736233503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:39,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460463839] [2021-06-05 15:09:39,763 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:39,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:39,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:39,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:09:39,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:39,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:39,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:39,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:09:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:39,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460463839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:39,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:39,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:09:39,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350098747] [2021-06-05 15:09:39,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:09:39,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:39,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:09:39,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:09:39,959 INFO L87 Difference]: Start difference. First operand 1974 states and 7126 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:40,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:40,806 INFO L93 Difference]: Finished difference Result 2447 states and 8580 transitions. [2021-06-05 15:09:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:09:40,806 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:40,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:40,810 INFO L225 Difference]: With dead ends: 2447 [2021-06-05 15:09:40,810 INFO L226 Difference]: Without dead ends: 2437 [2021-06-05 15:09:40,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 770.5ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:09:40,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2021-06-05 15:09:40,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1970. [2021-06-05 15:09:40,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1970 states, 1969 states have (on average 3.612493651599797) internal successors, (7113), 1969 states have internal predecessors, (7113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:40,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1970 states to 1970 states and 7113 transitions. [2021-06-05 15:09:40,845 INFO L78 Accepts]: Start accepts. Automaton has 1970 states and 7113 transitions. Word has length 24 [2021-06-05 15:09:40,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:40,846 INFO L482 AbstractCegarLoop]: Abstraction has 1970 states and 7113 transitions. [2021-06-05 15:09:40,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:40,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states and 7113 transitions. [2021-06-05 15:09:40,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:40,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:40,848 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:41,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2021-06-05 15:09:41,048 INFO L430 AbstractCegarLoop]: === Iteration 222 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:41,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:41,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1479020142, now seen corresponding path program 104 times [2021-06-05 15:09:41,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:41,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213528850] [2021-06-05 15:09:41,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:41,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:41,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213528850] [2021-06-05 15:09:41,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213528850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:41,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624580320] [2021-06-05 15:09:41,271 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:41,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:41,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:41,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:41,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:41,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:41,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:09:41,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:41,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:41,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:41,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:09:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:41,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624580320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:41,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:41,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:09:41,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115168510] [2021-06-05 15:09:41,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:09:41,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:41,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:09:41,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:09:41,531 INFO L87 Difference]: Start difference. First operand 1970 states and 7113 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:43,067 INFO L93 Difference]: Finished difference Result 2518 states and 8787 transitions. [2021-06-05 15:09:43,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:09:43,068 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:43,071 INFO L225 Difference]: With dead ends: 2518 [2021-06-05 15:09:43,071 INFO L226 Difference]: Without dead ends: 2499 [2021-06-05 15:09:43,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1439.5ms TimeCoverageRelationStatistics Valid=434, Invalid=2116, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:09:43,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2021-06-05 15:09:43,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 1974. [2021-06-05 15:09:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.6122655854029397) internal successors, (7127), 1973 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:43,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7127 transitions. [2021-06-05 15:09:43,096 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7127 transitions. Word has length 24 [2021-06-05 15:09:43,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:43,096 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7127 transitions. [2021-06-05 15:09:43,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:43,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7127 transitions. [2021-06-05 15:09:43,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:43,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:43,098 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:43,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:43,299 INFO L430 AbstractCegarLoop]: === Iteration 223 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:43,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:43,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1787797294, now seen corresponding path program 105 times [2021-06-05 15:09:43,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:43,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808158264] [2021-06-05 15:09:43,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:43,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:43,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808158264] [2021-06-05 15:09:43,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808158264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:43,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809146165] [2021-06-05 15:09:43,466 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:43,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:09:43,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:43,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:43,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:43,621 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:43,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:09:43,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:43,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:43,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:43,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:09:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:43,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809146165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:43,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:43,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:09:43,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755873388] [2021-06-05 15:09:43,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:43,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:43,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:43,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:43,725 INFO L87 Difference]: Start difference. First operand 1974 states and 7127 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:44,948 INFO L93 Difference]: Finished difference Result 2444 states and 8570 transitions. [2021-06-05 15:09:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:09:44,948 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:44,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:44,951 INFO L225 Difference]: With dead ends: 2444 [2021-06-05 15:09:44,951 INFO L226 Difference]: Without dead ends: 2425 [2021-06-05 15:09:44,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1085.5ms TimeCoverageRelationStatistics Valid=384, Invalid=1686, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:09:44,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2021-06-05 15:09:44,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 1979. [2021-06-05 15:09:44,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1979 states, 1978 states have (on average 3.6122345803842264) internal successors, (7145), 1978 states have internal predecessors, (7145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:44,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1979 states to 1979 states and 7145 transitions. [2021-06-05 15:09:44,976 INFO L78 Accepts]: Start accepts. Automaton has 1979 states and 7145 transitions. Word has length 24 [2021-06-05 15:09:44,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:44,976 INFO L482 AbstractCegarLoop]: Abstraction has 1979 states and 7145 transitions. [2021-06-05 15:09:44,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1979 states and 7145 transitions. [2021-06-05 15:09:44,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:44,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:44,978 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:45,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:45,179 INFO L430 AbstractCegarLoop]: === Iteration 224 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:45,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:45,179 INFO L82 PathProgramCache]: Analyzing trace with hash 2111383472, now seen corresponding path program 106 times [2021-06-05 15:09:45,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:45,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432638186] [2021-06-05 15:09:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:45,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:45,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:45,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432638186] [2021-06-05 15:09:45,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432638186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:45,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902005318] [2021-06-05 15:09:45,344 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:45,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:45,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:45,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:45,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:45,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:09:45,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:45,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:45,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:45,491 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:09:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:45,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902005318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:45,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:45,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:09:45,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643021532] [2021-06-05 15:09:45,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:45,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:45,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:45,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:45,537 INFO L87 Difference]: Start difference. First operand 1979 states and 7145 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:46,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:46,282 INFO L93 Difference]: Finished difference Result 2401 states and 8472 transitions. [2021-06-05 15:09:46,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:09:46,283 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:46,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:46,286 INFO L225 Difference]: With dead ends: 2401 [2021-06-05 15:09:46,286 INFO L226 Difference]: Without dead ends: 2388 [2021-06-05 15:09:46,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 697.6ms TimeCoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:09:46,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2388 states. [2021-06-05 15:09:46,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2388 to 1974. [2021-06-05 15:09:46,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.6122655854029397) internal successors, (7127), 1973 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:46,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7127 transitions. [2021-06-05 15:09:46,311 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7127 transitions. Word has length 24 [2021-06-05 15:09:46,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:46,311 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7127 transitions. [2021-06-05 15:09:46,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:46,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7127 transitions. [2021-06-05 15:09:46,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:46,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:46,314 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:46,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable386,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:46,514 INFO L430 AbstractCegarLoop]: === Iteration 225 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:46,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:46,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1365890042, now seen corresponding path program 107 times [2021-06-05 15:09:46,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:46,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410189049] [2021-06-05 15:09:46,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:46,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:46,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410189049] [2021-06-05 15:09:46,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410189049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:46,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701984224] [2021-06-05 15:09:46,732 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:46,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:46,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:46,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:46,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:46,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:46,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:46,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:46,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:46,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:09:46,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:46,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701984224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:46,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:46,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:09:46,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065315667] [2021-06-05 15:09:46,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:46,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:46,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:46,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:46,937 INFO L87 Difference]: Start difference. First operand 1974 states and 7127 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:48,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:48,031 INFO L93 Difference]: Finished difference Result 2538 states and 8840 transitions. [2021-06-05 15:09:48,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:09:48,031 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:48,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:48,035 INFO L225 Difference]: With dead ends: 2538 [2021-06-05 15:09:48,035 INFO L226 Difference]: Without dead ends: 2519 [2021-06-05 15:09:48,036 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 937.0ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:09:48,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2519 states. [2021-06-05 15:09:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2519 to 1974. [2021-06-05 15:09:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1973 states have (on average 3.6122655854029397) internal successors, (7127), 1973 states have internal predecessors, (7127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:48,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 7127 transitions. [2021-06-05 15:09:48,061 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 7127 transitions. Word has length 24 [2021-06-05 15:09:48,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:48,061 INFO L482 AbstractCegarLoop]: Abstraction has 1974 states and 7127 transitions. [2021-06-05 15:09:48,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:48,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 7127 transitions. [2021-06-05 15:09:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:48,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:48,064 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:48,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2021-06-05 15:09:48,264 INFO L430 AbstractCegarLoop]: === Iteration 226 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:48,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:48,264 INFO L82 PathProgramCache]: Analyzing trace with hash 109929152, now seen corresponding path program 108 times [2021-06-05 15:09:48,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:48,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80430667] [2021-06-05 15:09:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:48,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:48,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80430667] [2021-06-05 15:09:48,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80430667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:48,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529184730] [2021-06-05 15:09:48,484 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:48,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:09:48,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:48,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:09:48,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:48,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:48,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:48,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:48,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:48,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:15 [2021-06-05 15:09:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:48,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529184730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:48,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:48,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:09:48,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465203008] [2021-06-05 15:09:48,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:09:48,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:48,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:09:48,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:09:48,763 INFO L87 Difference]: Start difference. First operand 1974 states and 7127 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:49,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:49,336 INFO L93 Difference]: Finished difference Result 2514 states and 8723 transitions. [2021-06-05 15:09:49,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:09:49,336 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:49,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:49,340 INFO L225 Difference]: With dead ends: 2514 [2021-06-05 15:09:49,340 INFO L226 Difference]: Without dead ends: 2456 [2021-06-05 15:09:49,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 567.5ms TimeCoverageRelationStatistics Valid=201, Invalid=921, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:09:49,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2021-06-05 15:09:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 1983. [2021-06-05 15:09:49,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1983 states, 1982 states have (on average 3.608980827447023) internal successors, (7153), 1982 states have internal predecessors, (7153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1983 states to 1983 states and 7153 transitions. [2021-06-05 15:09:49,365 INFO L78 Accepts]: Start accepts. Automaton has 1983 states and 7153 transitions. Word has length 24 [2021-06-05 15:09:49,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:49,365 INFO L482 AbstractCegarLoop]: Abstraction has 1983 states and 7153 transitions. [2021-06-05 15:09:49,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:49,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1983 states and 7153 transitions. [2021-06-05 15:09:49,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:49,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:49,368 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:49,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 15:09:49,568 INFO L430 AbstractCegarLoop]: === Iteration 227 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:49,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:49,568 INFO L82 PathProgramCache]: Analyzing trace with hash 79584234, now seen corresponding path program 109 times [2021-06-05 15:09:49,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:49,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801010390] [2021-06-05 15:09:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:49,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:49,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:49,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801010390] [2021-06-05 15:09:49,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801010390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:49,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168465224] [2021-06-05 15:09:49,785 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:49,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:49,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:49,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:49,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:49,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:49,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:49,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:09:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:49,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168465224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:49,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:49,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:09:49,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190801627] [2021-06-05 15:09:49,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:49,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:49,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:49,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:49,992 INFO L87 Difference]: Start difference. First operand 1983 states and 7153 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:50,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:50,940 INFO L93 Difference]: Finished difference Result 2509 states and 8769 transitions. [2021-06-05 15:09:50,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:09:50,940 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:50,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:50,943 INFO L225 Difference]: With dead ends: 2509 [2021-06-05 15:09:50,943 INFO L226 Difference]: Without dead ends: 2499 [2021-06-05 15:09:50,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 851.4ms TimeCoverageRelationStatistics Valid=252, Invalid=1388, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:09:50,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2021-06-05 15:09:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 1984. [2021-06-05 15:09:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1984 states, 1983 states have (on average 3.6091780131114475) internal successors, (7157), 1983 states have internal predecessors, (7157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:50,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 7157 transitions. [2021-06-05 15:09:50,969 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 7157 transitions. Word has length 24 [2021-06-05 15:09:50,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:50,969 INFO L482 AbstractCegarLoop]: Abstraction has 1984 states and 7157 transitions. [2021-06-05 15:09:50,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 7157 transitions. [2021-06-05 15:09:50,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:50,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:50,971 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:51,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2021-06-05 15:09:51,172 INFO L430 AbstractCegarLoop]: === Iteration 228 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:51,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:51,172 INFO L82 PathProgramCache]: Analyzing trace with hash -96957198, now seen corresponding path program 110 times [2021-06-05 15:09:51,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:51,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181709723] [2021-06-05 15:09:51,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:51,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:51,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:51,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181709723] [2021-06-05 15:09:51,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181709723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:51,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226921240] [2021-06-05 15:09:51,347 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:51,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:51,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:51,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:51,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:51,505 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:51,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:09:51,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:51,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:51,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:51,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:09:51,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:51,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226921240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:51,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:51,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:09:51,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410525990] [2021-06-05 15:09:51,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:51,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:51,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:51,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:51,609 INFO L87 Difference]: Start difference. First operand 1984 states and 7157 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:53,215 INFO L93 Difference]: Finished difference Result 2588 states and 8993 transitions. [2021-06-05 15:09:53,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:09:53,216 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:53,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:53,219 INFO L225 Difference]: With dead ends: 2588 [2021-06-05 15:09:53,219 INFO L226 Difference]: Without dead ends: 2569 [2021-06-05 15:09:53,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1485.8ms TimeCoverageRelationStatistics Valid=508, Invalid=2462, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:09:53,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2569 states. [2021-06-05 15:09:53,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2569 to 1988. [2021-06-05 15:09:53,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 3.610468042274786) internal successors, (7174), 1987 states have internal predecessors, (7174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:53,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 7174 transitions. [2021-06-05 15:09:53,247 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 7174 transitions. Word has length 24 [2021-06-05 15:09:53,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:53,247 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 7174 transitions. [2021-06-05 15:09:53,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:53,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 7174 transitions. [2021-06-05 15:09:53,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:53,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:53,249 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:53,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2021-06-05 15:09:53,450 INFO L430 AbstractCegarLoop]: === Iteration 229 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:53,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:53,450 INFO L82 PathProgramCache]: Analyzing trace with hash -930695638, now seen corresponding path program 111 times [2021-06-05 15:09:53,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:53,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285976430] [2021-06-05 15:09:53,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:53,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:53,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285976430] [2021-06-05 15:09:53,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285976430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:53,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698213113] [2021-06-05 15:09:53,619 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:53,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:09:53,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:53,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:53,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:53,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:09:53,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:53,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:53,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:53,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:09:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:53,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698213113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:53,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:53,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:09:53,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437911782] [2021-06-05 15:09:53,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:53,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:53,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:53,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:53,817 INFO L87 Difference]: Start difference. First operand 1988 states and 7174 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:54,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:54,698 INFO L93 Difference]: Finished difference Result 2469 states and 8651 transitions. [2021-06-05 15:09:54,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:09:54,699 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:54,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:54,703 INFO L225 Difference]: With dead ends: 2469 [2021-06-05 15:09:54,703 INFO L226 Difference]: Without dead ends: 2459 [2021-06-05 15:09:54,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 797.5ms TimeCoverageRelationStatistics Valid=260, Invalid=1462, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:09:54,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-06-05 15:09:54,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1987. [2021-06-05 15:09:54,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1987 states, 1986 states have (on average 3.610271903323263) internal successors, (7170), 1986 states have internal predecessors, (7170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1987 states to 1987 states and 7170 transitions. [2021-06-05 15:09:54,730 INFO L78 Accepts]: Start accepts. Automaton has 1987 states and 7170 transitions. Word has length 24 [2021-06-05 15:09:54,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:54,730 INFO L482 AbstractCegarLoop]: Abstraction has 1987 states and 7170 transitions. [2021-06-05 15:09:54,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1987 states and 7170 transitions. [2021-06-05 15:09:54,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:54,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:54,733 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:54,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:54,933 INFO L430 AbstractCegarLoop]: === Iteration 230 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:54,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1762867562, now seen corresponding path program 112 times [2021-06-05 15:09:54,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:54,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276550266] [2021-06-05 15:09:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:55,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:55,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276550266] [2021-06-05 15:09:55,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276550266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:55,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616550893] [2021-06-05 15:09:55,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:55,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:55,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:55,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:55,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:55,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:09:55,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:55,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:55,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:55,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:09:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:55,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616550893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:55,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:55,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:09:55,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141510621] [2021-06-05 15:09:55,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:55,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:55,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:55,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:55,347 INFO L87 Difference]: Start difference. First operand 1987 states and 7170 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:56,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:56,314 INFO L93 Difference]: Finished difference Result 2492 states and 8720 transitions. [2021-06-05 15:09:56,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:09:56,314 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:56,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:56,318 INFO L225 Difference]: With dead ends: 2492 [2021-06-05 15:09:56,318 INFO L226 Difference]: Without dead ends: 2473 [2021-06-05 15:09:56,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 812.5ms TimeCoverageRelationStatistics Valid=247, Invalid=1313, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:09:56,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2473 states. [2021-06-05 15:09:56,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2473 to 1991. [2021-06-05 15:09:56,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 3.6105527638190953) internal successors, (7185), 1990 states have internal predecessors, (7185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 7185 transitions. [2021-06-05 15:09:56,345 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 7185 transitions. Word has length 24 [2021-06-05 15:09:56,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:56,345 INFO L482 AbstractCegarLoop]: Abstraction has 1991 states and 7185 transitions. [2021-06-05 15:09:56,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:56,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 7185 transitions. [2021-06-05 15:09:56,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:56,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:56,348 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:56,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable394 [2021-06-05 15:09:56,548 INFO L430 AbstractCegarLoop]: === Iteration 231 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:56,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:56,549 INFO L82 PathProgramCache]: Analyzing trace with hash 734717702, now seen corresponding path program 113 times [2021-06-05 15:09:56,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:56,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24040063] [2021-06-05 15:09:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:56,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:56,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24040063] [2021-06-05 15:09:56,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24040063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:56,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783339641] [2021-06-05 15:09:56,715 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:56,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:56,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:56,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:56,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:56,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:09:56,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:56,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:56,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:56,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:09:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:56,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783339641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:56,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:56,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:09:56,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624273332] [2021-06-05 15:09:56,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:09:56,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:56,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:09:56,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:09:56,927 INFO L87 Difference]: Start difference. First operand 1991 states and 7185 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:57,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:57,638 INFO L93 Difference]: Finished difference Result 2469 states and 8673 transitions. [2021-06-05 15:09:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:09:57,638 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:57,642 INFO L225 Difference]: With dead ends: 2469 [2021-06-05 15:09:57,642 INFO L226 Difference]: Without dead ends: 2459 [2021-06-05 15:09:57,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 666.9ms TimeCoverageRelationStatistics Valid=235, Invalid=1097, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:09:57,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2459 states. [2021-06-05 15:09:57,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2459 to 1994. [2021-06-05 15:09:57,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1994 states, 1993 states have (on average 3.611138986452584) internal successors, (7197), 1993 states have internal predecessors, (7197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:57,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1994 states to 1994 states and 7197 transitions. [2021-06-05 15:09:57,667 INFO L78 Accepts]: Start accepts. Automaton has 1994 states and 7197 transitions. Word has length 24 [2021-06-05 15:09:57,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:57,667 INFO L482 AbstractCegarLoop]: Abstraction has 1994 states and 7197 transitions. [2021-06-05 15:09:57,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:57,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1994 states and 7197 transitions. [2021-06-05 15:09:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:57,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:57,669 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:57,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:57,870 INFO L430 AbstractCegarLoop]: === Iteration 232 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:57,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:57,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1058303880, now seen corresponding path program 114 times [2021-06-05 15:09:57,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:57,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967977577] [2021-06-05 15:09:57,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:58,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:58,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:58,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967977577] [2021-06-05 15:09:58,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967977577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:58,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644572301] [2021-06-05 15:09:58,035 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:58,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:09:58,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:58,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:09:58,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:58,206 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:58,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:09:58,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:58,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:58,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:58,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:09:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:58,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644572301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:58,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:58,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:09:58,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527630430] [2021-06-05 15:09:58,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:09:58,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:58,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:09:58,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:09:58,306 INFO L87 Difference]: Start difference. First operand 1994 states and 7197 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:59,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:59,251 INFO L93 Difference]: Finished difference Result 2464 states and 8603 transitions. [2021-06-05 15:09:59,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:09:59,252 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:09:59,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:59,255 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 15:09:59,255 INFO L226 Difference]: Without dead ends: 2445 [2021-06-05 15:09:59,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 870.9ms TimeCoverageRelationStatistics Valid=287, Invalid=1273, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:09:59,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-06-05 15:09:59,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 1998. [2021-06-05 15:09:59,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1998 states, 1997 states have (on average 3.6119178768152227) internal successors, (7213), 1997 states have internal predecessors, (7213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:59,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1998 states to 1998 states and 7213 transitions. [2021-06-05 15:09:59,280 INFO L78 Accepts]: Start accepts. Automaton has 1998 states and 7213 transitions. Word has length 24 [2021-06-05 15:09:59,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:59,281 INFO L482 AbstractCegarLoop]: Abstraction has 1998 states and 7213 transitions. [2021-06-05 15:09:59,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:59,281 INFO L276 IsEmpty]: Start isEmpty. Operand 1998 states and 7213 transitions. [2021-06-05 15:09:59,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:09:59,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:59,283 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:59,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:59,484 INFO L430 AbstractCegarLoop]: === Iteration 233 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:09:59,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:59,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1550919294, now seen corresponding path program 115 times [2021-06-05 15:09:59,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:59,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139155751] [2021-06-05 15:09:59,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:59,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:59,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139155751] [2021-06-05 15:09:59,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139155751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:59,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558767107] [2021-06-05 15:09:59,644 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:59,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:59,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:59,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:09:59,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:59,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:59,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:59,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:09:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:59,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558767107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:59,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:59,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:09:59,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127268132] [2021-06-05 15:09:59,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:09:59,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:59,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:09:59,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:09:59,846 INFO L87 Difference]: Start difference. First operand 1998 states and 7213 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:00,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:00,489 INFO L93 Difference]: Finished difference Result 2386 states and 8411 transitions. [2021-06-05 15:10:00,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:10:00,490 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:00,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:00,493 INFO L225 Difference]: With dead ends: 2386 [2021-06-05 15:10:00,493 INFO L226 Difference]: Without dead ends: 2373 [2021-06-05 15:10:00,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 598.7ms TimeCoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:10:00,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2021-06-05 15:10:00,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 1991. [2021-06-05 15:10:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 3.6105527638190953) internal successors, (7185), 1990 states have internal predecessors, (7185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 7185 transitions. [2021-06-05 15:10:00,517 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 7185 transitions. Word has length 24 [2021-06-05 15:10:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:00,517 INFO L482 AbstractCegarLoop]: Abstraction has 1991 states and 7185 transitions. [2021-06-05 15:10:00,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:00,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 7185 transitions. [2021-06-05 15:10:00,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:00,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:00,520 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:00,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-05 15:10:00,720 INFO L430 AbstractCegarLoop]: === Iteration 234 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:00,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:00,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1912653030, now seen corresponding path program 116 times [2021-06-05 15:10:00,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:00,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874801425] [2021-06-05 15:10:00,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:00,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:00,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:00,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874801425] [2021-06-05 15:10:00,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874801425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:00,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284680845] [2021-06-05 15:10:00,926 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:00,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:00,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:00,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:10:00,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:01,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:10:01,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:01,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:01,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:01,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:15 [2021-06-05 15:10:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:01,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284680845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:01,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:01,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:10:01,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335246056] [2021-06-05 15:10:01,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:10:01,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:01,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:10:01,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:10:01,188 INFO L87 Difference]: Start difference. First operand 1991 states and 7185 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:01,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:01,817 INFO L93 Difference]: Finished difference Result 2486 states and 8672 transitions. [2021-06-05 15:10:01,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:10:01,817 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:01,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:01,821 INFO L225 Difference]: With dead ends: 2486 [2021-06-05 15:10:01,821 INFO L226 Difference]: Without dead ends: 2434 [2021-06-05 15:10:01,822 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 552.5ms TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:10:01,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-06-05 15:10:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 1995. [2021-06-05 15:10:01,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1994 states have (on average 3.6093279839518555) internal successors, (7197), 1994 states have internal predecessors, (7197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:01,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 7197 transitions. [2021-06-05 15:10:01,848 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 7197 transitions. Word has length 24 [2021-06-05 15:10:01,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:01,848 INFO L482 AbstractCegarLoop]: Abstraction has 1995 states and 7197 transitions. [2021-06-05 15:10:01,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:01,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 7197 transitions. [2021-06-05 15:10:01,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:01,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:01,851 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:02,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 15:10:02,051 INFO L430 AbstractCegarLoop]: === Iteration 235 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:02,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:02,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1695228144, now seen corresponding path program 117 times [2021-06-05 15:10:02,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:02,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402133851] [2021-06-05 15:10:02,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:02,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:02,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402133851] [2021-06-05 15:10:02,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402133851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:02,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690260537] [2021-06-05 15:10:02,216 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:02,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:10:02,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:02,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:02,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:02,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:02,389 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:02,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:10:02,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:02,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:02,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:02,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:46 [2021-06-05 15:10:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:02,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690260537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:02,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:02,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:10:02,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151241460] [2021-06-05 15:10:02,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:10:02,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:02,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:10:02,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:10:02,554 INFO L87 Difference]: Start difference. First operand 1995 states and 7197 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:03,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:03,743 INFO L93 Difference]: Finished difference Result 2464 states and 8608 transitions. [2021-06-05 15:10:03,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:10:03,744 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:03,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:03,747 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 15:10:03,747 INFO L226 Difference]: Without dead ends: 2445 [2021-06-05 15:10:03,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1051.6ms TimeCoverageRelationStatistics Valid=298, Invalid=1682, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:10:03,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-06-05 15:10:03,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 2002. [2021-06-05 15:10:03,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 3.6081959020489753) internal successors, (7220), 2001 states have internal predecessors, (7220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:03,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 7220 transitions. [2021-06-05 15:10:03,772 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 7220 transitions. Word has length 24 [2021-06-05 15:10:03,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:03,772 INFO L482 AbstractCegarLoop]: Abstraction has 2002 states and 7220 transitions. [2021-06-05 15:10:03,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:03,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 7220 transitions. [2021-06-05 15:10:03,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:03,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:03,775 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:03,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2021-06-05 15:10:03,975 INFO L430 AbstractCegarLoop]: === Iteration 236 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:03,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1766000712, now seen corresponding path program 118 times [2021-06-05 15:10:03,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:03,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755945410] [2021-06-05 15:10:03,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:04,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:04,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755945410] [2021-06-05 15:10:04,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755945410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:04,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530178375] [2021-06-05 15:10:04,168 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:04,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:04,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:04,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:04,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:04,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:10:04,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:04,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:04,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:04,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:10:04,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:04,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530178375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:04,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:04,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:10:04,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142970937] [2021-06-05 15:10:04,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:10:04,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:04,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:10:04,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:10:04,364 INFO L87 Difference]: Start difference. First operand 2002 states and 7220 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:05,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:05,193 INFO L93 Difference]: Finished difference Result 2479 states and 8688 transitions. [2021-06-05 15:10:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:10:05,194 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:05,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:05,198 INFO L225 Difference]: With dead ends: 2479 [2021-06-05 15:10:05,198 INFO L226 Difference]: Without dead ends: 2466 [2021-06-05 15:10:05,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 773.8ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:10:05,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2466 states. [2021-06-05 15:10:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2466 to 2000. [2021-06-05 15:10:05,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2000 states, 1999 states have (on average 3.6088044022011005) internal successors, (7214), 1999 states have internal predecessors, (7214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:05,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 7214 transitions. [2021-06-05 15:10:05,225 INFO L78 Accepts]: Start accepts. Automaton has 2000 states and 7214 transitions. Word has length 24 [2021-06-05 15:10:05,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:05,225 INFO L482 AbstractCegarLoop]: Abstraction has 2000 states and 7214 transitions. [2021-06-05 15:10:05,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:05,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2000 states and 7214 transitions. [2021-06-05 15:10:05,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:05,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:05,228 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:05,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:05,428 INFO L430 AbstractCegarLoop]: === Iteration 237 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:05,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:05,429 INFO L82 PathProgramCache]: Analyzing trace with hash 933375312, now seen corresponding path program 119 times [2021-06-05 15:10:05,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:05,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883859387] [2021-06-05 15:10:05,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:05,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:05,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:05,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883859387] [2021-06-05 15:10:05,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883859387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:05,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879927370] [2021-06-05 15:10:05,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:05,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:10:05,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:05,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:05,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:05,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:10:05,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:05,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:05,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:05,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:10:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:05,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879927370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:05,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:05,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:10:05,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439161362] [2021-06-05 15:10:05,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:10:05,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:05,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:10:05,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:10:05,849 INFO L87 Difference]: Start difference. First operand 2000 states and 7214 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:06,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:06,639 INFO L93 Difference]: Finished difference Result 2408 states and 8475 transitions. [2021-06-05 15:10:06,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:10:06,639 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:06,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:06,643 INFO L225 Difference]: With dead ends: 2408 [2021-06-05 15:10:06,643 INFO L226 Difference]: Without dead ends: 2399 [2021-06-05 15:10:06,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 716.2ms TimeCoverageRelationStatistics Valid=238, Invalid=1168, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:10:06,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-06-05 15:10:06,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2002. [2021-06-05 15:10:06,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2002 states, 2001 states have (on average 3.608695652173913) internal successors, (7221), 2001 states have internal predecessors, (7221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:06,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2002 states to 2002 states and 7221 transitions. [2021-06-05 15:10:06,668 INFO L78 Accepts]: Start accepts. Automaton has 2002 states and 7221 transitions. Word has length 24 [2021-06-05 15:10:06,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:06,668 INFO L482 AbstractCegarLoop]: Abstraction has 2002 states and 7221 transitions. [2021-06-05 15:10:06,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:06,668 INFO L276 IsEmpty]: Start isEmpty. Operand 2002 states and 7221 transitions. [2021-06-05 15:10:06,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:06,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:06,671 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:06,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2021-06-05 15:10:06,872 INFO L430 AbstractCegarLoop]: === Iteration 238 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:06,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:06,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1256961490, now seen corresponding path program 120 times [2021-06-05 15:10:06,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:06,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169258026] [2021-06-05 15:10:06,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:07,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:07,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169258026] [2021-06-05 15:10:07,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169258026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:07,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198606353] [2021-06-05 15:10:07,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:07,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:10:07,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:07,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:10:07,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:07,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:07,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:10:07,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:07,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:07,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:07,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:10:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:07,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198606353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:07,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:07,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:10:07,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878450020] [2021-06-05 15:10:07,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:07,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:07,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:07,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:07,298 INFO L87 Difference]: Start difference. First operand 2002 states and 7221 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:08,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:08,498 INFO L93 Difference]: Finished difference Result 2501 states and 8707 transitions. [2021-06-05 15:10:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:10:08,498 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:08,502 INFO L225 Difference]: With dead ends: 2501 [2021-06-05 15:10:08,502 INFO L226 Difference]: Without dead ends: 2482 [2021-06-05 15:10:08,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1015.3ms TimeCoverageRelationStatistics Valid=355, Invalid=1537, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:10:08,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2482 states. [2021-06-05 15:10:08,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2482 to 2006. [2021-06-05 15:10:08,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 3.6099750623441396) internal successors, (7238), 2005 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 7238 transitions. [2021-06-05 15:10:08,527 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 7238 transitions. Word has length 24 [2021-06-05 15:10:08,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:08,528 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 7238 transitions. [2021-06-05 15:10:08,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 7238 transitions. [2021-06-05 15:10:08,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:08,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:08,530 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:08,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:08,731 INFO L430 AbstractCegarLoop]: === Iteration 239 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:08,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:08,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1352261684, now seen corresponding path program 121 times [2021-06-05 15:10:08,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:08,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691012556] [2021-06-05 15:10:08,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:08,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:08,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691012556] [2021-06-05 15:10:08,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691012556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:08,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033491848] [2021-06-05 15:10:08,886 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:08,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:08,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:09,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:10:09,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:09,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:09,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:09,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:10:09,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:09,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033491848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:09,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:09,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:10:09,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464439848] [2021-06-05 15:10:09,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:10:09,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:09,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:10:09,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:10:09,079 INFO L87 Difference]: Start difference. First operand 2006 states and 7238 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:09,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:09,812 INFO L93 Difference]: Finished difference Result 2370 states and 8354 transitions. [2021-06-05 15:10:09,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:10:09,813 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:09,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:09,816 INFO L225 Difference]: With dead ends: 2370 [2021-06-05 15:10:09,816 INFO L226 Difference]: Without dead ends: 2359 [2021-06-05 15:10:09,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 619.0ms TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:10:09,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2359 states. [2021-06-05 15:10:09,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2359 to 2004. [2021-06-05 15:10:09,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 2003 states have (on average 3.6090863704443334) internal successors, (7229), 2003 states have internal predecessors, (7229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 7229 transitions. [2021-06-05 15:10:09,844 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 7229 transitions. Word has length 24 [2021-06-05 15:10:09,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:09,844 INFO L482 AbstractCegarLoop]: Abstraction has 2004 states and 7229 transitions. [2021-06-05 15:10:09,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:09,844 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 7229 transitions. [2021-06-05 15:10:09,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:09,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:09,847 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:10,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-05 15:10:10,047 INFO L430 AbstractCegarLoop]: === Iteration 240 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:10,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:10,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1230452128, now seen corresponding path program 122 times [2021-06-05 15:10:10,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:10,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045876595] [2021-06-05 15:10:10,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:10,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:10,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045876595] [2021-06-05 15:10:10,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045876595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:10,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214480460] [2021-06-05 15:10:10,200 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:10,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:10,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:10,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:10,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:10,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:10:10,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:10,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:10,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:10,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:10:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:10,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214480460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:10,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:10,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:10:10,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616317204] [2021-06-05 15:10:10,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:10:10,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:10,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:10:10,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:10:10,393 INFO L87 Difference]: Start difference. First operand 2004 states and 7229 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:11,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:11,304 INFO L93 Difference]: Finished difference Result 2441 states and 8576 transitions. [2021-06-05 15:10:11,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:10:11,305 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:11,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:11,309 INFO L225 Difference]: With dead ends: 2441 [2021-06-05 15:10:11,309 INFO L226 Difference]: Without dead ends: 2432 [2021-06-05 15:10:11,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 696.3ms TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:10:11,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2021-06-05 15:10:11,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 2005. [2021-06-05 15:10:11,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 3.6092814371257487) internal successors, (7233), 2004 states have internal predecessors, (7233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:11,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 7233 transitions. [2021-06-05 15:10:11,347 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 7233 transitions. Word has length 24 [2021-06-05 15:10:11,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:11,347 INFO L482 AbstractCegarLoop]: Abstraction has 2005 states and 7233 transitions. [2021-06-05 15:10:11,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:11,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 7233 transitions. [2021-06-05 15:10:11,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:11,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:11,350 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:11,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 15:10:11,550 INFO L430 AbstractCegarLoop]: === Iteration 241 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:11,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:11,551 INFO L82 PathProgramCache]: Analyzing trace with hash 221424754, now seen corresponding path program 123 times [2021-06-05 15:10:11,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:11,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673698596] [2021-06-05 15:10:11,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:11,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:11,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:11,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673698596] [2021-06-05 15:10:11,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673698596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:11,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609564805] [2021-06-05 15:10:11,698 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:11,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:10:11,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:11,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 15:10:11,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:11,861 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:11,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 61 [2021-06-05 15:10:11,862 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:11,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:12,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:12,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:1840 [2021-06-05 15:10:12,616 WARN L205 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 58 [2021-06-05 15:10:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:12,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609564805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:12,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:12,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:10:12,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164483213] [2021-06-05 15:10:12,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:10:12,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:12,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:10:12,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:10:12,889 INFO L87 Difference]: Start difference. First operand 2005 states and 7233 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 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 15:10:13,282 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 38 [2021-06-05 15:10:14,018 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-06-05 15:10:14,501 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-06-05 15:10:14,660 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-06-05 15:10:14,830 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-06-05 15:10:15,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:15,099 INFO L93 Difference]: Finished difference Result 2333 states and 8246 transitions. [2021-06-05 15:10:15,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:10:15,099 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 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 24 [2021-06-05 15:10:15,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:15,103 INFO L225 Difference]: With dead ends: 2333 [2021-06-05 15:10:15,103 INFO L226 Difference]: Without dead ends: 2323 [2021-06-05 15:10:15,103 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 2556.5ms TimeCoverageRelationStatistics Valid=326, Invalid=1930, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:10:15,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-06-05 15:10:15,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2007. [2021-06-05 15:10:15,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2007 states, 2006 states have (on average 3.610169491525424) internal successors, (7242), 2006 states have internal predecessors, (7242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:15,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2007 states to 2007 states and 7242 transitions. [2021-06-05 15:10:15,129 INFO L78 Accepts]: Start accepts. Automaton has 2007 states and 7242 transitions. Word has length 24 [2021-06-05 15:10:15,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:15,129 INFO L482 AbstractCegarLoop]: Abstraction has 2007 states and 7242 transitions. [2021-06-05 15:10:15,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 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 15:10:15,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2007 states and 7242 transitions. [2021-06-05 15:10:15,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:15,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:15,132 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:15,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2021-06-05 15:10:15,332 INFO L430 AbstractCegarLoop]: === Iteration 242 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:15,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:15,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1940929934, now seen corresponding path program 124 times [2021-06-05 15:10:15,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:15,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272683486] [2021-06-05 15:10:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:15,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:15,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272683486] [2021-06-05 15:10:15,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272683486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:15,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660780399] [2021-06-05 15:10:15,490 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:15,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:15,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:15,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:15,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:15,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:10:15,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:15,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:15,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:15,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:10:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:15,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660780399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:15,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:15,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:10:15,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464630032] [2021-06-05 15:10:15,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:10:15,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:15,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:10:15,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:10:15,684 INFO L87 Difference]: Start difference. First operand 2007 states and 7242 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:16,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:16,448 INFO L93 Difference]: Finished difference Result 2425 states and 8523 transitions. [2021-06-05 15:10:16,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:10:16,449 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:16,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:16,452 INFO L225 Difference]: With dead ends: 2425 [2021-06-05 15:10:16,452 INFO L226 Difference]: Without dead ends: 2416 [2021-06-05 15:10:16,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 623.9ms TimeCoverageRelationStatistics Valid=236, Invalid=1170, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:10:16,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2416 states. [2021-06-05 15:10:16,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2416 to 2006. [2021-06-05 15:10:16,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2006 states, 2005 states have (on average 3.6099750623441396) internal successors, (7238), 2005 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2006 states to 2006 states and 7238 transitions. [2021-06-05 15:10:16,477 INFO L78 Accepts]: Start accepts. Automaton has 2006 states and 7238 transitions. Word has length 24 [2021-06-05 15:10:16,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:16,478 INFO L482 AbstractCegarLoop]: Abstraction has 2006 states and 7238 transitions. [2021-06-05 15:10:16,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:16,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2006 states and 7238 transitions. [2021-06-05 15:10:16,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:16,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:16,480 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:16,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable451 [2021-06-05 15:10:16,680 INFO L430 AbstractCegarLoop]: === Iteration 243 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:16,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:16,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1166480298, now seen corresponding path program 125 times [2021-06-05 15:10:16,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:16,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69731134] [2021-06-05 15:10:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:16,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:16,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69731134] [2021-06-05 15:10:16,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69731134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:16,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032610275] [2021-06-05 15:10:16,831 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 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 15:10:16,858 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:10:16,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:16,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:16,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:16,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:10:16,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:16,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:16,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:16,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:10:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:17,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032610275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:17,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:17,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:10:17,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787485744] [2021-06-05 15:10:17,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:10:17,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:17,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:10:17,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:10:17,028 INFO L87 Difference]: Start difference. First operand 2006 states and 7238 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:17,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:17,801 INFO L93 Difference]: Finished difference Result 2401 states and 8458 transitions. [2021-06-05 15:10:17,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:10:17,801 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:17,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:17,805 INFO L225 Difference]: With dead ends: 2401 [2021-06-05 15:10:17,805 INFO L226 Difference]: Without dead ends: 2390 [2021-06-05 15:10:17,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 603.1ms TimeCoverageRelationStatistics Valid=205, Invalid=1055, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:10:17,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2021-06-05 15:10:17,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 2008. [2021-06-05 15:10:17,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.6093672147483806) internal successors, (7244), 2007 states have internal predecessors, (7244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:17,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7244 transitions. [2021-06-05 15:10:17,867 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7244 transitions. Word has length 24 [2021-06-05 15:10:17,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:17,868 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 7244 transitions. [2021-06-05 15:10:17,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:17,868 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7244 transitions. [2021-06-05 15:10:17,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:17,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:17,870 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:18,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2021-06-05 15:10:18,071 INFO L430 AbstractCegarLoop]: === Iteration 244 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:18,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:18,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2145894746, now seen corresponding path program 126 times [2021-06-05 15:10:18,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:18,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171142186] [2021-06-05 15:10:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:18,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:18,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171142186] [2021-06-05 15:10:18,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171142186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:18,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104756146] [2021-06-05 15:10:18,222 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:18,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:10:18,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:18,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:10:18,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:18,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:18,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:10:18,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:18,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:18,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:18,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:10:18,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:18,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104756146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:18,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:18,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:10:18,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743080831] [2021-06-05 15:10:18,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:18,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:18,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:18,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:18,555 INFO L87 Difference]: Start difference. First operand 2008 states and 7244 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:19,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:19,848 INFO L93 Difference]: Finished difference Result 2511 states and 8723 transitions. [2021-06-05 15:10:19,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:10:19,848 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:19,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:19,852 INFO L225 Difference]: With dead ends: 2511 [2021-06-05 15:10:19,852 INFO L226 Difference]: Without dead ends: 2492 [2021-06-05 15:10:19,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1076.9ms TimeCoverageRelationStatistics Valid=374, Invalid=1696, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:10:19,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2492 states. [2021-06-05 15:10:19,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2492 to 2010. [2021-06-05 15:10:19,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 3.6102538576406173) internal successors, (7253), 2009 states have internal predecessors, (7253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:19,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 7253 transitions. [2021-06-05 15:10:19,891 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 7253 transitions. Word has length 24 [2021-06-05 15:10:19,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:19,891 INFO L482 AbstractCegarLoop]: Abstraction has 2010 states and 7253 transitions. [2021-06-05 15:10:19,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:19,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 7253 transitions. [2021-06-05 15:10:19,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:19,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:19,894 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:20,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2021-06-05 15:10:20,094 INFO L430 AbstractCegarLoop]: === Iteration 245 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:20,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:20,094 INFO L82 PathProgramCache]: Analyzing trace with hash -428282352, now seen corresponding path program 127 times [2021-06-05 15:10:20,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:20,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241035181] [2021-06-05 15:10:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:20,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:20,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241035181] [2021-06-05 15:10:20,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241035181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:20,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205250763] [2021-06-05 15:10:20,243 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:20,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:20,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:20,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:20,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:10:20,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:20,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:20,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:20,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:10:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:20,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205250763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:20,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:20,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:10:20,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509081491] [2021-06-05 15:10:20,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:10:20,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:20,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:10:20,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:10:20,439 INFO L87 Difference]: Start difference. First operand 2010 states and 7253 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:21,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:21,046 INFO L93 Difference]: Finished difference Result 2354 states and 8315 transitions. [2021-06-05 15:10:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:10:21,047 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:21,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:21,050 INFO L225 Difference]: With dead ends: 2354 [2021-06-05 15:10:21,050 INFO L226 Difference]: Without dead ends: 2344 [2021-06-05 15:10:21,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 516.1ms TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:10:21,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2021-06-05 15:10:21,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 2008. [2021-06-05 15:10:21,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2008 states, 2007 states have (on average 3.610363726955655) internal successors, (7246), 2007 states have internal predecessors, (7246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2008 states to 2008 states and 7246 transitions. [2021-06-05 15:10:21,077 INFO L78 Accepts]: Start accepts. Automaton has 2008 states and 7246 transitions. Word has length 24 [2021-06-05 15:10:21,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:21,077 INFO L482 AbstractCegarLoop]: Abstraction has 2008 states and 7246 transitions. [2021-06-05 15:10:21,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:21,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2008 states and 7246 transitions. [2021-06-05 15:10:21,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:21,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:21,080 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:21,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:21,280 INFO L430 AbstractCegarLoop]: === Iteration 246 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:21,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:21,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1107281254, now seen corresponding path program 84 times [2021-06-05 15:10:21,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:21,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48658543] [2021-06-05 15:10:21,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:21,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:21,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48658543] [2021-06-05 15:10:21,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48658543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:21,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307295581] [2021-06-05 15:10:21,523 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:21,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:10:21,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:21,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:21,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:21,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:21,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:21,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:21,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 15:10:21,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:10:21,761 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:21,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:21,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 15:10:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:21,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307295581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:21,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:21,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:10:21,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198271371] [2021-06-05 15:10:21,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:10:21,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:21,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:10:21,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:10:21,830 INFO L87 Difference]: Start difference. First operand 2008 states and 7246 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:23,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:23,746 INFO L93 Difference]: Finished difference Result 2660 states and 9152 transitions. [2021-06-05 15:10:23,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:10:23,747 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:23,751 INFO L225 Difference]: With dead ends: 2660 [2021-06-05 15:10:23,751 INFO L226 Difference]: Without dead ends: 2590 [2021-06-05 15:10:23,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1539.8ms TimeCoverageRelationStatistics Valid=377, Invalid=2593, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:10:23,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2021-06-05 15:10:23,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2017. [2021-06-05 15:10:23,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 3.6086309523809526) internal successors, (7275), 2016 states have internal predecessors, (7275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:23,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 7275 transitions. [2021-06-05 15:10:23,794 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 7275 transitions. Word has length 24 [2021-06-05 15:10:23,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:23,794 INFO L482 AbstractCegarLoop]: Abstraction has 2017 states and 7275 transitions. [2021-06-05 15:10:23,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:23,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 7275 transitions. [2021-06-05 15:10:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:23,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:23,797 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:23,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2021-06-05 15:10:23,997 INFO L430 AbstractCegarLoop]: === Iteration 247 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:23,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:23,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1923388560, now seen corresponding path program 85 times [2021-06-05 15:10:23,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:23,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254092765] [2021-06-05 15:10:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:24,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:24,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254092765] [2021-06-05 15:10:24,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254092765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:24,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29880875] [2021-06-05 15:10:24,180 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:24,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:24,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:24,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:10:24,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:24,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:24,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:24,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:10:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:24,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29880875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:24,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:24,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:10:24,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654565758] [2021-06-05 15:10:24,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:24,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:24,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:24,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:24,388 INFO L87 Difference]: Start difference. First operand 2017 states and 7275 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:26,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:26,294 INFO L93 Difference]: Finished difference Result 2582 states and 8988 transitions. [2021-06-05 15:10:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:10:26,294 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:26,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:26,298 INFO L225 Difference]: With dead ends: 2582 [2021-06-05 15:10:26,298 INFO L226 Difference]: Without dead ends: 2540 [2021-06-05 15:10:26,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1500.6ms TimeCoverageRelationStatistics Valid=435, Invalid=2535, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:10:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2021-06-05 15:10:26,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 2020. [2021-06-05 15:10:26,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.6077265973254087) internal successors, (7284), 2019 states have internal predecessors, (7284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:26,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 7284 transitions. [2021-06-05 15:10:26,324 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 7284 transitions. Word has length 24 [2021-06-05 15:10:26,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:26,324 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 7284 transitions. [2021-06-05 15:10:26,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:26,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 7284 transitions. [2021-06-05 15:10:26,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:26,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:26,327 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:26,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:26,541 INFO L430 AbstractCegarLoop]: === Iteration 248 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:26,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:26,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2099929992, now seen corresponding path program 86 times [2021-06-05 15:10:26,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:26,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714276088] [2021-06-05 15:10:26,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:26,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:26,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714276088] [2021-06-05 15:10:26,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714276088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:26,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458473614] [2021-06-05 15:10:26,715 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:26,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:26,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:26,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:10:26,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:26,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:26,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:10:26,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:26,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:26,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:26,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:10:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:26,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458473614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:26,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:26,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:10:26,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311917232] [2021-06-05 15:10:26,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:26,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:26,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:26,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:26,967 INFO L87 Difference]: Start difference. First operand 2020 states and 7284 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:28,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:28,814 INFO L93 Difference]: Finished difference Result 2539 states and 8854 transitions. [2021-06-05 15:10:28,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:10:28,814 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:28,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:28,818 INFO L225 Difference]: With dead ends: 2539 [2021-06-05 15:10:28,818 INFO L226 Difference]: Without dead ends: 2493 [2021-06-05 15:10:28,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1649.4ms TimeCoverageRelationStatistics Valid=513, Invalid=2909, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 15:10:28,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2021-06-05 15:10:28,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2027. [2021-06-05 15:10:28,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2027 states, 2026 states have (on average 3.6076011846001976) internal successors, (7309), 2026 states have internal predecessors, (7309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:28,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2027 states to 2027 states and 7309 transitions. [2021-06-05 15:10:28,842 INFO L78 Accepts]: Start accepts. Automaton has 2027 states and 7309 transitions. Word has length 24 [2021-06-05 15:10:28,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:28,842 INFO L482 AbstractCegarLoop]: Abstraction has 2027 states and 7309 transitions. [2021-06-05 15:10:28,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:28,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2027 states and 7309 transitions. [2021-06-05 15:10:28,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:28,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:28,845 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:29,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:29,046 INFO L430 AbstractCegarLoop]: === Iteration 249 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:29,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:29,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1361298864, now seen corresponding path program 87 times [2021-06-05 15:10:29,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:29,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043848179] [2021-06-05 15:10:29,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:29,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:29,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043848179] [2021-06-05 15:10:29,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043848179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:29,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488467112] [2021-06-05 15:10:29,226 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:29,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:10:29,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:29,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:10:29,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:29,379 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:29,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:10:29,381 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:29,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:29,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:29,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:10:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:29,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488467112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:29,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:29,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:10:29,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108531230] [2021-06-05 15:10:29,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:29,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:29,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:29,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:29,488 INFO L87 Difference]: Start difference. First operand 2027 states and 7309 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:31,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:31,212 INFO L93 Difference]: Finished difference Result 2478 states and 8649 transitions. [2021-06-05 15:10:31,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:10:31,213 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:31,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:31,216 INFO L225 Difference]: With dead ends: 2478 [2021-06-05 15:10:31,217 INFO L226 Difference]: Without dead ends: 2457 [2021-06-05 15:10:31,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1430.2ms TimeCoverageRelationStatistics Valid=374, Invalid=2076, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:10:31,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-06-05 15:10:31,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2026. [2021-06-05 15:10:31,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 3.608395061728395) internal successors, (7307), 2025 states have internal predecessors, (7307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:31,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 7307 transitions. [2021-06-05 15:10:31,242 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 7307 transitions. Word has length 24 [2021-06-05 15:10:31,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:31,242 INFO L482 AbstractCegarLoop]: Abstraction has 2026 states and 7307 transitions. [2021-06-05 15:10:31,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:31,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 7307 transitions. [2021-06-05 15:10:31,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:31,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:31,244 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:31,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable464,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:31,445 INFO L430 AbstractCegarLoop]: === Iteration 250 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:31,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:31,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2143132664, now seen corresponding path program 88 times [2021-06-05 15:10:31,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:31,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67911167] [2021-06-05 15:10:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:31,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:31,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67911167] [2021-06-05 15:10:31,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67911167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:31,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147440691] [2021-06-05 15:10:31,629 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:31,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:31,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:31,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:31,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:31,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:10:31,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:31,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:31,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:31,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:10:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:31,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147440691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:31,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:31,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:10:31,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016073803] [2021-06-05 15:10:31,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:10:31,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:31,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:10:31,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:10:31,828 INFO L87 Difference]: Start difference. First operand 2026 states and 7307 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:33,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:33,014 INFO L93 Difference]: Finished difference Result 2424 states and 8516 transitions. [2021-06-05 15:10:33,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:10:33,015 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:33,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:33,018 INFO L225 Difference]: With dead ends: 2424 [2021-06-05 15:10:33,018 INFO L226 Difference]: Without dead ends: 2407 [2021-06-05 15:10:33,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1025.2ms TimeCoverageRelationStatistics Valid=283, Invalid=1609, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:10:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2021-06-05 15:10:33,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 2023. [2021-06-05 15:10:33,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 3.609297725024728) internal successors, (7298), 2022 states have internal predecessors, (7298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:33,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 7298 transitions. [2021-06-05 15:10:33,042 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 7298 transitions. Word has length 24 [2021-06-05 15:10:33,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:33,042 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 7298 transitions. [2021-06-05 15:10:33,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 7298 transitions. [2021-06-05 15:10:33,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:33,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:33,044 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:33,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:33,249 INFO L430 AbstractCegarLoop]: === Iteration 251 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:33,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:33,249 INFO L82 PathProgramCache]: Analyzing trace with hash -460321124, now seen corresponding path program 128 times [2021-06-05 15:10:33,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:33,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358172795] [2021-06-05 15:10:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:33,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:33,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:33,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358172795] [2021-06-05 15:10:33,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358172795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:33,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742624536] [2021-06-05 15:10:33,464 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:33,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:33,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:33,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:10:33,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:33,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:33,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:33,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:10:33,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:33,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:33,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:33,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:10:33,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:33,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742624536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:33,775 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:33,775 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:10:33,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544883869] [2021-06-05 15:10:33,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:10:33,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:33,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:10:33,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:10:33,776 INFO L87 Difference]: Start difference. First operand 2023 states and 7298 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:35,528 INFO L93 Difference]: Finished difference Result 2630 states and 9090 transitions. [2021-06-05 15:10:35,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:10:35,528 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:35,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:35,532 INFO L225 Difference]: With dead ends: 2630 [2021-06-05 15:10:35,532 INFO L226 Difference]: Without dead ends: 2580 [2021-06-05 15:10:35,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 1476.9ms TimeCoverageRelationStatistics Valid=397, Invalid=2359, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:10:35,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2580 states. [2021-06-05 15:10:35,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2580 to 2026. [2021-06-05 15:10:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2026 states, 2025 states have (on average 3.608888888888889) internal successors, (7308), 2025 states have internal predecessors, (7308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:35,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2026 states to 2026 states and 7308 transitions. [2021-06-05 15:10:35,560 INFO L78 Accepts]: Start accepts. Automaton has 2026 states and 7308 transitions. Word has length 24 [2021-06-05 15:10:35,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:35,560 INFO L482 AbstractCegarLoop]: Abstraction has 2026 states and 7308 transitions. [2021-06-05 15:10:35,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:35,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2026 states and 7308 transitions. [2021-06-05 15:10:35,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:35,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:35,563 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:35,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-05 15:10:35,763 INFO L430 AbstractCegarLoop]: === Iteration 252 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:35,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:35,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1268350622, now seen corresponding path program 129 times [2021-06-05 15:10:35,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:35,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410187889] [2021-06-05 15:10:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:35,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:35,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410187889] [2021-06-05 15:10:35,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410187889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:35,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104827855] [2021-06-05 15:10:35,979 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:36,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:10:36,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:36,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:10:36,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:36,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:36,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:10:36,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:36,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:36,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:36,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:10:36,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:36,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104827855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:36,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:36,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:10:36,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70860277] [2021-06-05 15:10:36,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:10:36,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:36,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:10:36,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:10:36,269 INFO L87 Difference]: Start difference. First operand 2026 states and 7308 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:36,536 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2021-06-05 15:10:38,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:38,971 INFO L93 Difference]: Finished difference Result 2613 states and 9074 transitions. [2021-06-05 15:10:38,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:10:38,972 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:38,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:38,976 INFO L225 Difference]: With dead ends: 2613 [2021-06-05 15:10:38,976 INFO L226 Difference]: Without dead ends: 2574 [2021-06-05 15:10:38,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 2277.9ms TimeCoverageRelationStatistics Valid=606, Invalid=3554, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:10:38,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2574 states. [2021-06-05 15:10:38,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2574 to 2029. [2021-06-05 15:10:38,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2029 states, 2028 states have (on average 3.608481262327416) internal successors, (7318), 2028 states have internal predecessors, (7318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 7318 transitions. [2021-06-05 15:10:39,002 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 7318 transitions. Word has length 24 [2021-06-05 15:10:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:39,002 INFO L482 AbstractCegarLoop]: Abstraction has 2029 states and 7318 transitions. [2021-06-05 15:10:39,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:39,002 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 7318 transitions. [2021-06-05 15:10:39,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:39,004 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:39,005 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:39,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:39,205 INFO L430 AbstractCegarLoop]: === Iteration 253 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:39,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:39,205 INFO L82 PathProgramCache]: Analyzing trace with hash 240200762, now seen corresponding path program 130 times [2021-06-05 15:10:39,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:39,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793284876] [2021-06-05 15:10:39,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:39,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:39,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793284876] [2021-06-05 15:10:39,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793284876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:39,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940317282] [2021-06-05 15:10:39,381 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:39,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:39,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:39,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:39,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:39,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:10:39,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:39,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:39,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:39,557 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:10:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:39,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940317282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:39,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:39,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:10:39,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160911654] [2021-06-05 15:10:39,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:10:39,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:39,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:10:39,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:10:39,602 INFO L87 Difference]: Start difference. First operand 2029 states and 7318 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:40,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:40,861 INFO L93 Difference]: Finished difference Result 2464 states and 8660 transitions. [2021-06-05 15:10:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:10:40,861 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:40,865 INFO L225 Difference]: With dead ends: 2464 [2021-06-05 15:10:40,865 INFO L226 Difference]: Without dead ends: 2438 [2021-06-05 15:10:40,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1142.2ms TimeCoverageRelationStatistics Valid=384, Invalid=1872, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:10:40,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-06-05 15:10:40,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2032. [2021-06-05 15:10:40,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 3.6070901033973413) internal successors, (7326), 2031 states have internal predecessors, (7326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:40,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 7326 transitions. [2021-06-05 15:10:40,888 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 7326 transitions. Word has length 24 [2021-06-05 15:10:40,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:40,888 INFO L482 AbstractCegarLoop]: Abstraction has 2032 states and 7326 transitions. [2021-06-05 15:10:40,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:40,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 7326 transitions. [2021-06-05 15:10:40,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:40,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:40,890 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:41,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:41,091 INFO L430 AbstractCegarLoop]: === Iteration 254 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:41,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:41,091 INFO L82 PathProgramCache]: Analyzing trace with hash 563786940, now seen corresponding path program 131 times [2021-06-05 15:10:41,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:41,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753150842] [2021-06-05 15:10:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:41,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:41,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:41,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753150842] [2021-06-05 15:10:41,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753150842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:41,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571605307] [2021-06-05 15:10:41,285 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:41,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:41,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:41,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:41,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:41,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:10:41,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:41,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:41,466 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:41,466 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:10:41,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:41,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571605307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:41,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:41,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:10:41,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65909360] [2021-06-05 15:10:41,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:10:41,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:41,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:10:41,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:10:41,513 INFO L87 Difference]: Start difference. First operand 2032 states and 7326 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:42,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:42,736 INFO L93 Difference]: Finished difference Result 2452 states and 8624 transitions. [2021-06-05 15:10:42,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:10:42,736 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:42,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:42,740 INFO L225 Difference]: With dead ends: 2452 [2021-06-05 15:10:42,740 INFO L226 Difference]: Without dead ends: 2427 [2021-06-05 15:10:42,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1002.5ms TimeCoverageRelationStatistics Valid=285, Invalid=1437, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:10:42,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2427 states. [2021-06-05 15:10:42,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2427 to 2025. [2021-06-05 15:10:42,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 3.6096837944664033) internal successors, (7306), 2024 states have internal predecessors, (7306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:42,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 7306 transitions. [2021-06-05 15:10:42,764 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 7306 transitions. Word has length 24 [2021-06-05 15:10:42,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:42,764 INFO L482 AbstractCegarLoop]: Abstraction has 2025 states and 7306 transitions. [2021-06-05 15:10:42,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:42,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 7306 transitions. [2021-06-05 15:10:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:42,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:42,767 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:42,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable473 [2021-06-05 15:10:42,967 INFO L430 AbstractCegarLoop]: === Iteration 255 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:42,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:42,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1854959050, now seen corresponding path program 89 times [2021-06-05 15:10:42,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:42,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318387328] [2021-06-05 15:10:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:43,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:43,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318387328] [2021-06-05 15:10:43,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318387328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:43,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637764476] [2021-06-05 15:10:43,156 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:43,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:10:43,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:43,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:43,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:43,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:10:43,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:43,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:43,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:43,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:10:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:43,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637764476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:43,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:43,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:10:43,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089592837] [2021-06-05 15:10:43,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:43,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:43,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:43,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:43,388 INFO L87 Difference]: Start difference. First operand 2025 states and 7306 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:45,756 INFO L93 Difference]: Finished difference Result 2892 states and 9978 transitions. [2021-06-05 15:10:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 15:10:45,756 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:45,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:45,762 INFO L225 Difference]: With dead ends: 2892 [2021-06-05 15:10:45,762 INFO L226 Difference]: Without dead ends: 2832 [2021-06-05 15:10:45,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1896.8ms TimeCoverageRelationStatistics Valid=585, Invalid=2955, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:10:45,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-05 15:10:45,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2045. [2021-06-05 15:10:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2045 states, 2044 states have (on average 3.606164383561644) internal successors, (7371), 2044 states have internal predecessors, (7371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:45,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2045 states to 2045 states and 7371 transitions. [2021-06-05 15:10:45,797 INFO L78 Accepts]: Start accepts. Automaton has 2045 states and 7371 transitions. Word has length 24 [2021-06-05 15:10:45,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:45,797 INFO L482 AbstractCegarLoop]: Abstraction has 2045 states and 7371 transitions. [2021-06-05 15:10:45,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:45,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2045 states and 7371 transitions. [2021-06-05 15:10:45,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:45,801 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:45,801 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:46,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2021-06-05 15:10:46,002 INFO L430 AbstractCegarLoop]: === Iteration 256 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:46,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:46,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1238645496, now seen corresponding path program 90 times [2021-06-05 15:10:46,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:46,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340625538] [2021-06-05 15:10:46,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:46,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:46,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340625538] [2021-06-05 15:10:46,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340625538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:46,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156611282] [2021-06-05 15:10:46,191 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:46,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:10:46,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:46,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:10:46,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:46,344 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:46,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:10:46,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:46,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:46,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:46,356 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:10:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:46,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156611282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:46,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:46,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:10:46,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554035968] [2021-06-05 15:10:46,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:46,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:46,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:46,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:46,462 INFO L87 Difference]: Start difference. First operand 2045 states and 7371 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:48,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:48,802 INFO L93 Difference]: Finished difference Result 2693 states and 9333 transitions. [2021-06-05 15:10:48,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:10:48,803 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:48,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:48,808 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 15:10:48,808 INFO L226 Difference]: Without dead ends: 2642 [2021-06-05 15:10:48,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 2101.0ms TimeCoverageRelationStatistics Valid=652, Invalid=3380, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:10:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2021-06-05 15:10:48,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2049. [2021-06-05 15:10:48,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 2048 states have (on average 3.60546875) internal successors, (7384), 2048 states have internal predecessors, (7384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 7384 transitions. [2021-06-05 15:10:48,838 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 7384 transitions. Word has length 24 [2021-06-05 15:10:48,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:48,838 INFO L482 AbstractCegarLoop]: Abstraction has 2049 states and 7384 transitions. [2021-06-05 15:10:48,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 7384 transitions. [2021-06-05 15:10:48,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:48,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:48,841 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:49,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2021-06-05 15:10:49,043 INFO L430 AbstractCegarLoop]: === Iteration 257 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:49,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:49,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1797839404, now seen corresponding path program 132 times [2021-06-05 15:10:49,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:49,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5469380] [2021-06-05 15:10:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:49,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:49,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5469380] [2021-06-05 15:10:49,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5469380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:49,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028525640] [2021-06-05 15:10:49,277 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:49,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:10:49,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:49,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:10:49,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:49,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:49,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:49,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:10:49,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:49,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:49,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:49,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:10:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:49,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028525640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:49,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:49,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:10:49,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124407656] [2021-06-05 15:10:49,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:10:49,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:49,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:10:49,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:10:49,573 INFO L87 Difference]: Start difference. First operand 2049 states and 7384 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:52,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:52,164 INFO L93 Difference]: Finished difference Result 2862 states and 9855 transitions. [2021-06-05 15:10:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:10:52,164 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:52,168 INFO L225 Difference]: With dead ends: 2862 [2021-06-05 15:10:52,169 INFO L226 Difference]: Without dead ends: 2804 [2021-06-05 15:10:52,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 2209.6ms TimeCoverageRelationStatistics Valid=732, Invalid=3690, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:10:52,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2804 states. [2021-06-05 15:10:52,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2804 to 2057. [2021-06-05 15:10:52,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2057 states, 2056 states have (on average 3.6060311284046693) internal successors, (7414), 2056 states have internal predecessors, (7414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:52,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2057 states to 2057 states and 7414 transitions. [2021-06-05 15:10:52,196 INFO L78 Accepts]: Start accepts. Automaton has 2057 states and 7414 transitions. Word has length 24 [2021-06-05 15:10:52,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:52,196 INFO L482 AbstractCegarLoop]: Abstraction has 2057 states and 7414 transitions. [2021-06-05 15:10:52,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:52,196 INFO L276 IsEmpty]: Start isEmpty. Operand 2057 states and 7414 transitions. [2021-06-05 15:10:52,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:52,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:52,198 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:52,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable477,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:52,399 INFO L430 AbstractCegarLoop]: === Iteration 258 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:52,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:52,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1468978032, now seen corresponding path program 133 times [2021-06-05 15:10:52,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:52,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843673927] [2021-06-05 15:10:52,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:52,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:52,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:52,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843673927] [2021-06-05 15:10:52,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843673927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:52,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872925818] [2021-06-05 15:10:52,567 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:52,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:52,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:52,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:10:52,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:52,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:52,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:52,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:10:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:52,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872925818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:52,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:52,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:10:52,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228440920] [2021-06-05 15:10:52,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:10:52,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:52,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:10:52,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:10:52,751 INFO L87 Difference]: Start difference. First operand 2057 states and 7414 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:54,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:54,630 INFO L93 Difference]: Finished difference Result 2726 states and 9487 transitions. [2021-06-05 15:10:54,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:10:54,630 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:54,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:54,634 INFO L225 Difference]: With dead ends: 2726 [2021-06-05 15:10:54,634 INFO L226 Difference]: Without dead ends: 2684 [2021-06-05 15:10:54,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 1622.3ms TimeCoverageRelationStatistics Valid=592, Invalid=2600, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:10:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2021-06-05 15:10:54,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 2061. [2021-06-05 15:10:54,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 3.6048543689320387) internal successors, (7426), 2060 states have internal predecessors, (7426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:54,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 7426 transitions. [2021-06-05 15:10:54,661 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 7426 transitions. Word has length 24 [2021-06-05 15:10:54,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:54,661 INFO L482 AbstractCegarLoop]: Abstraction has 2061 states and 7426 transitions. [2021-06-05 15:10:54,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:54,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 7426 transitions. [2021-06-05 15:10:54,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:54,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:54,664 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:54,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 15:10:54,864 INFO L430 AbstractCegarLoop]: === Iteration 259 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:54,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:54,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1792564210, now seen corresponding path program 134 times [2021-06-05 15:10:54,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:54,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950626067] [2021-06-05 15:10:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:55,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:55,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950626067] [2021-06-05 15:10:55,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950626067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:55,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976299090] [2021-06-05 15:10:55,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:55,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:55,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:55,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:10:55,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:55,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:55,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:10:55,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:55,186 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:55,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:55,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:10:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:55,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976299090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:55,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:55,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:10:55,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248880886] [2021-06-05 15:10:55,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:10:55,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:55,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:10:55,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:10:55,279 INFO L87 Difference]: Start difference. First operand 2061 states and 7426 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:57,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:57,696 INFO L93 Difference]: Finished difference Result 2706 states and 9360 transitions. [2021-06-05 15:10:57,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:10:57,696 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:57,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:57,701 INFO L225 Difference]: With dead ends: 2706 [2021-06-05 15:10:57,701 INFO L226 Difference]: Without dead ends: 2666 [2021-06-05 15:10:57,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 2031.6ms TimeCoverageRelationStatistics Valid=645, Invalid=3261, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:10:57,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2666 states. [2021-06-05 15:10:57,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2666 to 2069. [2021-06-05 15:10:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 3.604448742746615) internal successors, (7454), 2068 states have internal predecessors, (7454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:57,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 7454 transitions. [2021-06-05 15:10:57,727 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 7454 transitions. Word has length 24 [2021-06-05 15:10:57,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:57,728 INFO L482 AbstractCegarLoop]: Abstraction has 2069 states and 7454 transitions. [2021-06-05 15:10:57,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:57,728 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 7454 transitions. [2021-06-05 15:10:57,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:57,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:57,730 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:57,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable479,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:57,931 INFO L430 AbstractCegarLoop]: === Iteration 260 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:10:57,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:57,931 INFO L82 PathProgramCache]: Analyzing trace with hash -816658964, now seen corresponding path program 135 times [2021-06-05 15:10:57,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:57,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353091290] [2021-06-05 15:10:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:58,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:58,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353091290] [2021-06-05 15:10:58,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353091290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:58,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788485044] [2021-06-05 15:10:58,096 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:58,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:10:58,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:58,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:58,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:58,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:10:58,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:58,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:58,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:58,242 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:10:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:58,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788485044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:58,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:58,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:10:58,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830368477] [2021-06-05 15:10:58,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:10:58,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:58,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:10:58,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:10:58,283 INFO L87 Difference]: Start difference. First operand 2069 states and 7454 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:59,886 INFO L93 Difference]: Finished difference Result 2577 states and 9029 transitions. [2021-06-05 15:10:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:10:59,887 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:10:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:59,891 INFO L225 Difference]: With dead ends: 2577 [2021-06-05 15:10:59,891 INFO L226 Difference]: Without dead ends: 2556 [2021-06-05 15:10:59,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1358.1ms TimeCoverageRelationStatistics Valid=449, Invalid=2101, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:10:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2021-06-05 15:10:59,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 2053. [2021-06-05 15:10:59,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 3.6062378167641325) internal successors, (7400), 2052 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:59,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 7400 transitions. [2021-06-05 15:10:59,917 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 7400 transitions. Word has length 24 [2021-06-05 15:10:59,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:59,917 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 7400 transitions. [2021-06-05 15:10:59,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:59,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 7400 transitions. [2021-06-05 15:10:59,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:10:59,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:59,919 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:00,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:00,120 INFO L430 AbstractCegarLoop]: === Iteration 261 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:00,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:00,120 INFO L82 PathProgramCache]: Analyzing trace with hash -357681178, now seen corresponding path program 91 times [2021-06-05 15:11:00,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:00,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564495406] [2021-06-05 15:11:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:00,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:00,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564495406] [2021-06-05 15:11:00,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564495406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:00,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24124486] [2021-06-05 15:11:00,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:00,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:00,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:00,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:00,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:00,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:00,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:00,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:11:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:00,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24124486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:00,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:00,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:11:00,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21997273] [2021-06-05 15:11:00,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:11:00,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:00,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:11:00,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:11:00,484 INFO L87 Difference]: Start difference. First operand 2053 states and 7400 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:03,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:03,237 INFO L93 Difference]: Finished difference Result 3882 states and 12995 transitions. [2021-06-05 15:11:03,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 15:11:03,237 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:03,244 INFO L225 Difference]: With dead ends: 3882 [2021-06-05 15:11:03,244 INFO L226 Difference]: Without dead ends: 3817 [2021-06-05 15:11:03,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 2383.6ms TimeCoverageRelationStatistics Valid=1169, Invalid=4993, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:11:03,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3817 states. [2021-06-05 15:11:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3817 to 2126. [2021-06-05 15:11:03,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 3.6291764705882352) internal successors, (7712), 2125 states have internal predecessors, (7712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 7712 transitions. [2021-06-05 15:11:03,281 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 7712 transitions. Word has length 24 [2021-06-05 15:11:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:03,281 INFO L482 AbstractCegarLoop]: Abstraction has 2126 states and 7712 transitions. [2021-06-05 15:11:03,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:03,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 7712 transitions. [2021-06-05 15:11:03,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:03,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:03,284 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:03,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:03,485 INFO L430 AbstractCegarLoop]: === Iteration 262 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:03,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1879791260, now seen corresponding path program 136 times [2021-06-05 15:11:03,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:03,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358897707] [2021-06-05 15:11:03,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:03,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:03,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358897707] [2021-06-05 15:11:03,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358897707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:03,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213427291] [2021-06-05 15:11:03,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:03,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:03,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:03,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:03,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:03,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:03,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:03,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:03,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:03,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:11:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:03,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213427291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:03,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:03,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:11:03,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062247189] [2021-06-05 15:11:03,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:11:03,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:03,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:11:03,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:11:03,844 INFO L87 Difference]: Start difference. First operand 2126 states and 7712 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:06,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:06,498 INFO L93 Difference]: Finished difference Result 3896 states and 13187 transitions. [2021-06-05 15:11:06,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 15:11:06,498 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:06,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:06,505 INFO L225 Difference]: With dead ends: 3896 [2021-06-05 15:11:06,505 INFO L226 Difference]: Without dead ends: 3835 [2021-06-05 15:11:06,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 2249.2ms TimeCoverageRelationStatistics Valid=1154, Invalid=5008, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:11:06,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3835 states. [2021-06-05 15:11:06,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3835 to 2196. [2021-06-05 15:11:06,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 3.655125284738041) internal successors, (8023), 2195 states have internal predecessors, (8023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:06,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 8023 transitions. [2021-06-05 15:11:06,540 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 8023 transitions. Word has length 24 [2021-06-05 15:11:06,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:06,541 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 8023 transitions. [2021-06-05 15:11:06,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:06,541 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 8023 transitions. [2021-06-05 15:11:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:06,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:06,543 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:06,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable484,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:06,744 INFO L430 AbstractCegarLoop]: === Iteration 263 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:06,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:06,744 INFO L82 PathProgramCache]: Analyzing trace with hash -2091589858, now seen corresponding path program 137 times [2021-06-05 15:11:06,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:06,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324330319] [2021-06-05 15:11:06,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:06,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:06,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324330319] [2021-06-05 15:11:06,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324330319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:06,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905874429] [2021-06-05 15:11:06,913 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:06,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:11:06,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:06,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:06,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:07,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:07,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:07,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:07,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:07,055 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:11:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:07,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905874429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:07,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:07,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:11:07,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073097899] [2021-06-05 15:11:07,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:11:07,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:07,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:11:07,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:11:07,103 INFO L87 Difference]: Start difference. First operand 2196 states and 8023 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:09,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:09,569 INFO L93 Difference]: Finished difference Result 3701 states and 12762 transitions. [2021-06-05 15:11:09,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 15:11:09,569 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:09,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:09,575 INFO L225 Difference]: With dead ends: 3701 [2021-06-05 15:11:09,576 INFO L226 Difference]: Without dead ends: 3658 [2021-06-05 15:11:09,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 2042.6ms TimeCoverageRelationStatistics Valid=974, Invalid=4428, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 15:11:09,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2021-06-05 15:11:09,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 2202. [2021-06-05 15:11:09,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2202 states, 2201 states have (on average 3.659700136301681) internal successors, (8055), 2201 states have internal predecessors, (8055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2202 states to 2202 states and 8055 transitions. [2021-06-05 15:11:09,611 INFO L78 Accepts]: Start accepts. Automaton has 2202 states and 8055 transitions. Word has length 24 [2021-06-05 15:11:09,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:09,611 INFO L482 AbstractCegarLoop]: Abstraction has 2202 states and 8055 transitions. [2021-06-05 15:11:09,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 2202 states and 8055 transitions. [2021-06-05 15:11:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:09,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:09,629 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:09,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2021-06-05 15:11:09,829 INFO L430 AbstractCegarLoop]: === Iteration 264 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:09,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:09,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1554667190, now seen corresponding path program 92 times [2021-06-05 15:11:09,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:09,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571886871] [2021-06-05 15:11:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:09,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:09,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571886871] [2021-06-05 15:11:09,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571886871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:09,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375354794] [2021-06-05 15:11:09,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:10,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:10,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:10,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:10,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:10,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:10,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:11:10,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:10,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:10,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:10,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:11:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:10,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375354794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:10,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:10,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:11:10,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743636169] [2021-06-05 15:11:10,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:10,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:10,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:10,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:10,238 INFO L87 Difference]: Start difference. First operand 2202 states and 8055 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:13,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:13,136 INFO L93 Difference]: Finished difference Result 3738 states and 12902 transitions. [2021-06-05 15:11:13,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 15:11:13,136 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:13,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:13,142 INFO L225 Difference]: With dead ends: 3738 [2021-06-05 15:11:13,142 INFO L226 Difference]: Without dead ends: 3704 [2021-06-05 15:11:13,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 2397.4ms TimeCoverageRelationStatistics Valid=931, Invalid=4619, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:11:13,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3704 states. [2021-06-05 15:11:13,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3704 to 2243. [2021-06-05 15:11:13,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 3.68064228367529) internal successors, (8252), 2242 states have internal predecessors, (8252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:13,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 8252 transitions. [2021-06-05 15:11:13,177 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 8252 transitions. Word has length 24 [2021-06-05 15:11:13,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:13,177 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 8252 transitions. [2021-06-05 15:11:13,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:13,177 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 8252 transitions. [2021-06-05 15:11:13,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:13,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:13,180 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:13,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-05 15:11:13,380 INFO L430 AbstractCegarLoop]: === Iteration 265 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:13,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:13,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1759585324, now seen corresponding path program 138 times [2021-06-05 15:11:13,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:13,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979680271] [2021-06-05 15:11:13,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:13,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:13,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:13,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979680271] [2021-06-05 15:11:13,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979680271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:13,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300067731] [2021-06-05 15:11:13,580 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:13,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:11:13,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:13,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:13,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:13,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:13,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:11:13,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:13,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:13,760 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:13,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 15:11:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:13,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300067731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:13,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:13,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:11:13,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201840530] [2021-06-05 15:11:13,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:13,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:13,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:13,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:13,832 INFO L87 Difference]: Start difference. First operand 2243 states and 8252 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:16,990 INFO L93 Difference]: Finished difference Result 3686 states and 12714 transitions. [2021-06-05 15:11:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 15:11:16,990 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:16,997 INFO L225 Difference]: With dead ends: 3686 [2021-06-05 15:11:16,997 INFO L226 Difference]: Without dead ends: 3656 [2021-06-05 15:11:16,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2073 ImplicationChecksByTransitivity, 2733.5ms TimeCoverageRelationStatistics Valid=1095, Invalid=5067, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:11:17,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2021-06-05 15:11:17,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 2245. [2021-06-05 15:11:17,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.679590017825312) internal successors, (8257), 2244 states have internal predecessors, (8257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:17,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 8257 transitions. [2021-06-05 15:11:17,034 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 8257 transitions. Word has length 24 [2021-06-05 15:11:17,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:17,034 INFO L482 AbstractCegarLoop]: Abstraction has 2245 states and 8257 transitions. [2021-06-05 15:11:17,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:17,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 8257 transitions. [2021-06-05 15:11:17,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:17,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:17,037 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:17,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable488,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:17,238 INFO L430 AbstractCegarLoop]: === Iteration 266 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:17,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:17,238 INFO L82 PathProgramCache]: Analyzing trace with hash -73841202, now seen corresponding path program 139 times [2021-06-05 15:11:17,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:17,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568272405] [2021-06-05 15:11:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:17,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:17,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:17,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568272405] [2021-06-05 15:11:17,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568272405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:17,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030053447] [2021-06-05 15:11:17,412 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:17,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:17,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:17,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:11:17,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:17,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:17,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:17,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:11:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:17,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030053447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:17,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:17,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:11:17,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033315632] [2021-06-05 15:11:17,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:11:17,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:17,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:11:17,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:11:17,595 INFO L87 Difference]: Start difference. First operand 2245 states and 8257 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:19,918 INFO L93 Difference]: Finished difference Result 3537 states and 12238 transitions. [2021-06-05 15:11:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 15:11:19,919 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:19,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:19,924 INFO L225 Difference]: With dead ends: 3537 [2021-06-05 15:11:19,924 INFO L226 Difference]: Without dead ends: 3502 [2021-06-05 15:11:19,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 1826.5ms TimeCoverageRelationStatistics Valid=777, Invalid=3383, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:11:19,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3502 states. [2021-06-05 15:11:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3502 to 2223. [2021-06-05 15:11:19,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 2222 states have (on average 3.6665166516651664) internal successors, (8147), 2222 states have internal predecessors, (8147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:19,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 8147 transitions. [2021-06-05 15:11:19,959 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 8147 transitions. Word has length 24 [2021-06-05 15:11:19,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:19,959 INFO L482 AbstractCegarLoop]: Abstraction has 2223 states and 8147 transitions. [2021-06-05 15:11:19,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:19,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 8147 transitions. [2021-06-05 15:11:19,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:19,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:19,962 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:20,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable491,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:20,162 INFO L430 AbstractCegarLoop]: === Iteration 267 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:20,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:20,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1816560186, now seen corresponding path program 140 times [2021-06-05 15:11:20,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:20,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295454417] [2021-06-05 15:11:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:20,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:20,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:20,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:20,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295454417] [2021-06-05 15:11:20,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295454417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:20,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533572314] [2021-06-05 15:11:20,373 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:20,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:20,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:20,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:20,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:20,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:20,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:11:20,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:11:20,631 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:20,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:20,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:20,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:11:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:20,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533572314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:20,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:20,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:11:20,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567882732] [2021-06-05 15:11:20,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:11:20,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:20,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:11:20,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:11:20,668 INFO L87 Difference]: Start difference. First operand 2223 states and 8147 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:20,951 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2021-06-05 15:11:21,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:21,979 INFO L93 Difference]: Finished difference Result 2779 states and 9798 transitions. [2021-06-05 15:11:21,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:11:21,979 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:21,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:21,984 INFO L225 Difference]: With dead ends: 2779 [2021-06-05 15:11:21,984 INFO L226 Difference]: Without dead ends: 2729 [2021-06-05 15:11:21,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 1148.0ms TimeCoverageRelationStatistics Valid=288, Invalid=1692, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:11:21,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2729 states. [2021-06-05 15:11:22,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2729 to 2227. [2021-06-05 15:11:22,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2227 states, 2226 states have (on average 3.665768194070081) internal successors, (8160), 2226 states have internal predecessors, (8160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 8160 transitions. [2021-06-05 15:11:22,013 INFO L78 Accepts]: Start accepts. Automaton has 2227 states and 8160 transitions. Word has length 24 [2021-06-05 15:11:22,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:22,013 INFO L482 AbstractCegarLoop]: Abstraction has 2227 states and 8160 transitions. [2021-06-05 15:11:22,013 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:22,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2227 states and 8160 transitions. [2021-06-05 15:11:22,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:22,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:22,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:22,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:22,216 INFO L430 AbstractCegarLoop]: === Iteration 268 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:22,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:22,217 INFO L82 PathProgramCache]: Analyzing trace with hash -749735364, now seen corresponding path program 141 times [2021-06-05 15:11:22,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:22,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054509620] [2021-06-05 15:11:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:22,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:22,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:22,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054509620] [2021-06-05 15:11:22,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054509620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:22,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538059102] [2021-06-05 15:11:22,427 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:22,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:11:22,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:22,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:22,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:22,629 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:22,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:11:22,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:22,639 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:22,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:22,640 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:11:22,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:22,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538059102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:22,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:22,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:11:22,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221371616] [2021-06-05 15:11:22,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:11:22,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:22,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:11:22,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:11:22,705 INFO L87 Difference]: Start difference. First operand 2227 states and 8160 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:22,979 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 15:11:24,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:24,566 INFO L93 Difference]: Finished difference Result 2773 states and 9806 transitions. [2021-06-05 15:11:24,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:11:24,566 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:24,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:24,571 INFO L225 Difference]: With dead ends: 2773 [2021-06-05 15:11:24,571 INFO L226 Difference]: Without dead ends: 2737 [2021-06-05 15:11:24,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1658.0ms TimeCoverageRelationStatistics Valid=441, Invalid=2421, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:11:24,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2737 states. [2021-06-05 15:11:24,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2737 to 2230. [2021-06-05 15:11:24,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.665320771646478) internal successors, (8170), 2229 states have internal predecessors, (8170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 8170 transitions. [2021-06-05 15:11:24,601 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 8170 transitions. Word has length 24 [2021-06-05 15:11:24,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:24,601 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 8170 transitions. [2021-06-05 15:11:24,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:24,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 8170 transitions. [2021-06-05 15:11:24,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:24,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:24,604 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:24,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:24,806 INFO L430 AbstractCegarLoop]: === Iteration 269 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:24,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:24,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1777885224, now seen corresponding path program 142 times [2021-06-05 15:11:24,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:24,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850822105] [2021-06-05 15:11:24,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:25,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:25,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850822105] [2021-06-05 15:11:25,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850822105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:25,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455837176] [2021-06-05 15:11:25,020 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:25,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:25,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:25,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:25,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:25,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:25,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:25,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:25,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:25,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:11:25,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:25,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455837176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:25,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:25,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:11:25,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584815696] [2021-06-05 15:11:25,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:11:25,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:25,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:11:25,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:11:25,222 INFO L87 Difference]: Start difference. First operand 2230 states and 8170 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:26,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:26,241 INFO L93 Difference]: Finished difference Result 2693 states and 9594 transitions. [2021-06-05 15:11:26,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:11:26,241 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:26,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:26,246 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 15:11:26,246 INFO L226 Difference]: Without dead ends: 2667 [2021-06-05 15:11:26,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 957.1ms TimeCoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:11:26,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2021-06-05 15:11:26,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2235. [2021-06-05 15:11:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2235 states, 2234 states have (on average 3.6638316920322294) internal successors, (8185), 2234 states have internal predecessors, (8185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:26,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 8185 transitions. [2021-06-05 15:11:26,274 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 8185 transitions. Word has length 24 [2021-06-05 15:11:26,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:26,274 INFO L482 AbstractCegarLoop]: Abstraction has 2235 states and 8185 transitions. [2021-06-05 15:11:26,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:26,274 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 8185 transitions. [2021-06-05 15:11:26,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:26,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:26,276 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:26,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-05 15:11:26,477 INFO L430 AbstractCegarLoop]: === Iteration 270 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:26,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:26,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1454299046, now seen corresponding path program 143 times [2021-06-05 15:11:26,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:26,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688088874] [2021-06-05 15:11:26,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:26,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:26,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688088874] [2021-06-05 15:11:26,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688088874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:26,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267111388] [2021-06-05 15:11:26,650 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:26,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:26,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:26,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:26,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:26,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:26,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:26,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:26,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:26,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:11:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:26,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267111388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:26,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:26,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:11:26,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399341154] [2021-06-05 15:11:26,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:11:26,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:26,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:11:26,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:11:26,849 INFO L87 Difference]: Start difference. First operand 2235 states and 8185 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:27,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:27,917 INFO L93 Difference]: Finished difference Result 2644 states and 9457 transitions. [2021-06-05 15:11:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:11:27,918 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:27,922 INFO L225 Difference]: With dead ends: 2644 [2021-06-05 15:11:27,922 INFO L226 Difference]: Without dead ends: 2619 [2021-06-05 15:11:27,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 920.3ms TimeCoverageRelationStatistics Valid=271, Invalid=1369, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:11:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-06-05 15:11:27,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 2228. [2021-06-05 15:11:27,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 3.666367310282892) internal successors, (8165), 2227 states have internal predecessors, (8165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:27,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 8165 transitions. [2021-06-05 15:11:27,948 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 8165 transitions. Word has length 24 [2021-06-05 15:11:27,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:27,948 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 8165 transitions. [2021-06-05 15:11:27,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:27,948 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 8165 transitions. [2021-06-05 15:11:27,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:27,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:27,951 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:28,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2021-06-05 15:11:28,151 INFO L430 AbstractCegarLoop]: === Iteration 271 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:28,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:28,152 INFO L82 PathProgramCache]: Analyzing trace with hash -455428470, now seen corresponding path program 144 times [2021-06-05 15:11:28,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:28,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559188686] [2021-06-05 15:11:28,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:28,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:28,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559188686] [2021-06-05 15:11:28,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559188686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:28,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064462338] [2021-06-05 15:11:28,385 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:28,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:11:28,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:28,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:28,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:28,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:28,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:11:28,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:11:28,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:28,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:28,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:28,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:11:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:28,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064462338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:28,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:28,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:11:28,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673629580] [2021-06-05 15:11:28,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:11:28,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:28,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:11:28,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:11:28,662 INFO L87 Difference]: Start difference. First operand 2228 states and 8165 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:28,953 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 15:11:29,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:29,844 INFO L93 Difference]: Finished difference Result 2746 states and 9710 transitions. [2021-06-05 15:11:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:11:29,844 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:29,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:29,848 INFO L225 Difference]: With dead ends: 2746 [2021-06-05 15:11:29,848 INFO L226 Difference]: Without dead ends: 2704 [2021-06-05 15:11:29,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1012.1ms TimeCoverageRelationStatistics Valid=254, Invalid=1552, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:11:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-06-05 15:11:29,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2230. [2021-06-05 15:11:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2230 states, 2229 states have (on average 3.6657694033198744) internal successors, (8171), 2229 states have internal predecessors, (8171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:29,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2230 states to 2230 states and 8171 transitions. [2021-06-05 15:11:29,876 INFO L78 Accepts]: Start accepts. Automaton has 2230 states and 8171 transitions. Word has length 24 [2021-06-05 15:11:29,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:29,876 INFO L482 AbstractCegarLoop]: Abstraction has 2230 states and 8171 transitions. [2021-06-05 15:11:29,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:29,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2230 states and 8171 transitions. [2021-06-05 15:11:29,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:29,879 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:29,879 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:30,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-06-05 15:11:30,080 INFO L430 AbstractCegarLoop]: === Iteration 272 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:30,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:30,080 INFO L82 PathProgramCache]: Analyzing trace with hash 808869012, now seen corresponding path program 145 times [2021-06-05 15:11:30,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:30,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603983169] [2021-06-05 15:11:30,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:30,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:30,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603983169] [2021-06-05 15:11:30,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603983169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:30,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602867933] [2021-06-05 15:11:30,299 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:30,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:30,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:30,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:11:30,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:30,499 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:30,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:30,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:11:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:30,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602867933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:30,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:30,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:11:30,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639187648] [2021-06-05 15:11:30,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:30,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:30,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:30,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:30,529 INFO L87 Difference]: Start difference. First operand 2230 states and 8171 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:30,778 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 15:11:31,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:31,675 INFO L93 Difference]: Finished difference Result 2749 states and 9747 transitions. [2021-06-05 15:11:31,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:11:31,675 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:31,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:31,679 INFO L225 Difference]: With dead ends: 2749 [2021-06-05 15:11:31,679 INFO L226 Difference]: Without dead ends: 2723 [2021-06-05 15:11:31,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1015.6ms TimeCoverageRelationStatistics Valid=275, Invalid=1531, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:11:31,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2723 states. [2021-06-05 15:11:31,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2723 to 2232. [2021-06-05 15:11:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 2231 states have (on average 3.665172568354998) internal successors, (8177), 2231 states have internal predecessors, (8177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 8177 transitions. [2021-06-05 15:11:31,706 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 8177 transitions. Word has length 24 [2021-06-05 15:11:31,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:31,707 INFO L482 AbstractCegarLoop]: Abstraction has 2232 states and 8177 transitions. [2021-06-05 15:11:31,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:31,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 8177 transitions. [2021-06-05 15:11:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:31,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:31,709 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:31,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 15:11:31,910 INFO L430 AbstractCegarLoop]: === Iteration 273 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:31,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:31,910 INFO L82 PathProgramCache]: Analyzing trace with hash 632327580, now seen corresponding path program 146 times [2021-06-05 15:11:31,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:31,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424953764] [2021-06-05 15:11:31,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:32,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:32,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424953764] [2021-06-05 15:11:32,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424953764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:32,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631891506] [2021-06-05 15:11:32,100 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:32,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:32,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:32,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:32,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:32,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:32,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:11:32,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:32,279 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:32,280 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:32,280 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:11:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:32,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631891506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:32,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:32,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:11:32,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294802712] [2021-06-05 15:11:32,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:32,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:32,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:32,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:32,375 INFO L87 Difference]: Start difference. First operand 2232 states and 8177 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:32,677 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2021-06-05 15:11:34,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:34,235 INFO L93 Difference]: Finished difference Result 2814 states and 9921 transitions. [2021-06-05 15:11:34,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:11:34,236 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:34,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:34,240 INFO L225 Difference]: With dead ends: 2814 [2021-06-05 15:11:34,240 INFO L226 Difference]: Without dead ends: 2778 [2021-06-05 15:11:34,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1612.5ms TimeCoverageRelationStatistics Valid=503, Invalid=2577, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:11:34,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2021-06-05 15:11:34,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2233. [2021-06-05 15:11:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 3.6657706093189963) internal successors, (8182), 2232 states have internal predecessors, (8182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 8182 transitions. [2021-06-05 15:11:34,278 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 8182 transitions. Word has length 24 [2021-06-05 15:11:34,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:34,278 INFO L482 AbstractCegarLoop]: Abstraction has 2233 states and 8182 transitions. [2021-06-05 15:11:34,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:34,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 8182 transitions. [2021-06-05 15:11:34,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:34,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:34,281 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:34,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:34,482 INFO L430 AbstractCegarLoop]: === Iteration 274 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:34,482 INFO L82 PathProgramCache]: Analyzing trace with hash -201410860, now seen corresponding path program 147 times [2021-06-05 15:11:34,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:34,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958746993] [2021-06-05 15:11:34,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:34,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:34,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:34,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958746993] [2021-06-05 15:11:34,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958746993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:34,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025884391] [2021-06-05 15:11:34,661 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:34,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:11:34,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:34,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:34,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:34,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:34,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:11:34,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:34,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:34,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:34,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:11:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:34,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025884391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:34,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:34,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:11:34,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290189697] [2021-06-05 15:11:34,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:34,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:34,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:34,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:34,946 INFO L87 Difference]: Start difference. First operand 2233 states and 8182 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:35,234 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2021-06-05 15:11:36,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:36,562 INFO L93 Difference]: Finished difference Result 2807 states and 9852 transitions. [2021-06-05 15:11:36,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:11:36,563 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:36,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:36,567 INFO L225 Difference]: With dead ends: 2807 [2021-06-05 15:11:36,567 INFO L226 Difference]: Without dead ends: 2779 [2021-06-05 15:11:36,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1422.1ms TimeCoverageRelationStatistics Valid=358, Invalid=2092, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:11:36,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2021-06-05 15:11:36,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2234. [2021-06-05 15:11:36,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 3.667263770712047) internal successors, (8189), 2233 states have internal predecessors, (8189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 8189 transitions. [2021-06-05 15:11:36,596 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 8189 transitions. Word has length 24 [2021-06-05 15:11:36,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:36,596 INFO L482 AbstractCegarLoop]: Abstraction has 2234 states and 8189 transitions. [2021-06-05 15:11:36,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 8189 transitions. [2021-06-05 15:11:36,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:36,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:36,599 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:36,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2021-06-05 15:11:36,800 INFO L430 AbstractCegarLoop]: === Iteration 275 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:36,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:36,800 INFO L82 PathProgramCache]: Analyzing trace with hash 580422940, now seen corresponding path program 148 times [2021-06-05 15:11:36,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:36,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743632353] [2021-06-05 15:11:36,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:36,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:36,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:36,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:36,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743632353] [2021-06-05 15:11:36,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743632353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:36,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708914531] [2021-06-05 15:11:36,978 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:37,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:37,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:37,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:37,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:37,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:37,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:37,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:37,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:37,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:11:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:37,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708914531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:37,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:37,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:11:37,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013814750] [2021-06-05 15:11:37,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:11:37,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:37,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:11:37,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:11:37,197 INFO L87 Difference]: Start difference. First operand 2234 states and 8189 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:37,443 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-06-05 15:11:38,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:38,174 INFO L93 Difference]: Finished difference Result 2654 states and 9469 transitions. [2021-06-05 15:11:38,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:11:38,174 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:38,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:38,178 INFO L225 Difference]: With dead ends: 2654 [2021-06-05 15:11:38,178 INFO L226 Difference]: Without dead ends: 2640 [2021-06-05 15:11:38,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 891.6ms TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:11:38,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2021-06-05 15:11:38,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2233. [2021-06-05 15:11:38,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2233 states, 2232 states have (on average 3.668010752688172) internal successors, (8187), 2232 states have internal predecessors, (8187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:38,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2233 states to 2233 states and 8187 transitions. [2021-06-05 15:11:38,205 INFO L78 Accepts]: Start accepts. Automaton has 2233 states and 8187 transitions. Word has length 24 [2021-06-05 15:11:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:38,205 INFO L482 AbstractCegarLoop]: Abstraction has 2233 states and 8187 transitions. [2021-06-05 15:11:38,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:38,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2233 states and 8187 transitions. [2021-06-05 15:11:38,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:38,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:38,207 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:38,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable506 [2021-06-05 15:11:38,408 INFO L430 AbstractCegarLoop]: === Iteration 276 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:38,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:38,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1802814956, now seen corresponding path program 149 times [2021-06-05 15:11:38,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:38,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948519811] [2021-06-05 15:11:38,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:38,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:38,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:38,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948519811] [2021-06-05 15:11:38,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948519811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:38,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904832002] [2021-06-05 15:11:38,621 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:38,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:38,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:38,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:38,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:38,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:11:38,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:38,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:38,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:38,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:11:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:38,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904832002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:38,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:38,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:11:38,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887998477] [2021-06-05 15:11:38,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:38,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:38,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:38,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:38,831 INFO L87 Difference]: Start difference. First operand 2233 states and 8187 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:39,080 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 15:11:40,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:40,077 INFO L93 Difference]: Finished difference Result 2750 states and 9744 transitions. [2021-06-05 15:11:40,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:11:40,078 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:40,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:40,082 INFO L225 Difference]: With dead ends: 2750 [2021-06-05 15:11:40,082 INFO L226 Difference]: Without dead ends: 2714 [2021-06-05 15:11:40,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 1063.9ms TimeCoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:11:40,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2714 states. [2021-06-05 15:11:40,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2714 to 2238. [2021-06-05 15:11:40,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2237 states have (on average 3.6678587393831026) internal successors, (8205), 2237 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 8205 transitions. [2021-06-05 15:11:40,109 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 8205 transitions. Word has length 24 [2021-06-05 15:11:40,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:40,109 INFO L482 AbstractCegarLoop]: Abstraction has 2238 states and 8205 transitions. [2021-06-05 15:11:40,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:40,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 8205 transitions. [2021-06-05 15:11:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:40,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:40,112 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:40,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:40,312 INFO L430 AbstractCegarLoop]: === Iteration 277 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:40,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:40,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1464002480, now seen corresponding path program 150 times [2021-06-05 15:11:40,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:40,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544757913] [2021-06-05 15:11:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:40,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:40,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544757913] [2021-06-05 15:11:40,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544757913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:40,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228877072] [2021-06-05 15:11:40,494 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:40,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:11:40,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:40,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:40,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:40,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:40,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:11:40,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:40,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:40,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:40,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:11:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:40,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228877072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:40,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:40,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:11:40,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484400064] [2021-06-05 15:11:40,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:40,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:40,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:40,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:40,756 INFO L87 Difference]: Start difference. First operand 2238 states and 8205 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:41,001 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-06-05 15:11:42,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:42,091 INFO L93 Difference]: Finished difference Result 2707 states and 9616 transitions. [2021-06-05 15:11:42,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:11:42,091 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:42,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:42,095 INFO L225 Difference]: With dead ends: 2707 [2021-06-05 15:11:42,096 INFO L226 Difference]: Without dead ends: 2671 [2021-06-05 15:11:42,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 1276.0ms TimeCoverageRelationStatistics Valid=380, Invalid=1876, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:11:42,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-06-05 15:11:42,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 2243. [2021-06-05 15:11:42,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 3.6663693131132917) internal successors, (8220), 2242 states have internal predecessors, (8220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:42,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 8220 transitions. [2021-06-05 15:11:42,123 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 8220 transitions. Word has length 24 [2021-06-05 15:11:42,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:42,123 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 8220 transitions. [2021-06-05 15:11:42,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:42,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 8220 transitions. [2021-06-05 15:11:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:42,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:42,126 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:42,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:42,326 INFO L430 AbstractCegarLoop]: === Iteration 278 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:42,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:42,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1787588658, now seen corresponding path program 151 times [2021-06-05 15:11:42,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:42,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676181710] [2021-06-05 15:11:42,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:42,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:42,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676181710] [2021-06-05 15:11:42,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676181710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:42,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169939397] [2021-06-05 15:11:42,503 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:42,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:42,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:42,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:42,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:42,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:42,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:42,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:11:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:42,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169939397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:42,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:42,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:11:42,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181227324] [2021-06-05 15:11:42,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:11:42,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:42,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:11:42,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:11:42,701 INFO L87 Difference]: Start difference. First operand 2243 states and 8220 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:43,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:43,580 INFO L93 Difference]: Finished difference Result 2641 states and 9458 transitions. [2021-06-05 15:11:43,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:11:43,580 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:43,584 INFO L225 Difference]: With dead ends: 2641 [2021-06-05 15:11:43,584 INFO L226 Difference]: Without dead ends: 2616 [2021-06-05 15:11:43,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 824.4ms TimeCoverageRelationStatistics Valid=239, Invalid=1167, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:11:43,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-06-05 15:11:43,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2236. [2021-06-05 15:11:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2236 states, 2235 states have (on average 3.668456375838926) internal successors, (8199), 2235 states have internal predecessors, (8199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:43,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2236 states to 2236 states and 8199 transitions. [2021-06-05 15:11:43,610 INFO L78 Accepts]: Start accepts. Automaton has 2236 states and 8199 transitions. Word has length 24 [2021-06-05 15:11:43,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:43,610 INFO L482 AbstractCegarLoop]: Abstraction has 2236 states and 8199 transitions. [2021-06-05 15:11:43,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:43,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2236 states and 8199 transitions. [2021-06-05 15:11:43,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:43,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:43,613 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:43,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:43,814 INFO L430 AbstractCegarLoop]: === Iteration 279 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:43,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:43,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1183368252, now seen corresponding path program 152 times [2021-06-05 15:11:43,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:43,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55804868] [2021-06-05 15:11:43,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:44,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:44,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55804868] [2021-06-05 15:11:44,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55804868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:44,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979414005] [2021-06-05 15:11:44,044 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:44,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:44,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:44,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:44,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:44,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:44,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:11:44,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:11:44,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:44,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:44,282 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:44,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:11:44,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:44,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979414005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:44,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:44,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:11:44,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85839779] [2021-06-05 15:11:44,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:11:44,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:44,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:11:44,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:11:44,314 INFO L87 Difference]: Start difference. First operand 2236 states and 8199 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:44,615 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2021-06-05 15:11:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:45,573 INFO L93 Difference]: Finished difference Result 2732 states and 9669 transitions. [2021-06-05 15:11:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:11:45,574 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:45,578 INFO L225 Difference]: With dead ends: 2732 [2021-06-05 15:11:45,578 INFO L226 Difference]: Without dead ends: 2680 [2021-06-05 15:11:45,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1000.4ms TimeCoverageRelationStatistics Valid=258, Invalid=1548, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:11:45,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2680 states. [2021-06-05 15:11:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2680 to 2238. [2021-06-05 15:11:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2237 states have (on average 3.6678587393831026) internal successors, (8205), 2237 states have internal predecessors, (8205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:45,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 8205 transitions. [2021-06-05 15:11:45,606 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 8205 transitions. Word has length 24 [2021-06-05 15:11:45,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:45,606 INFO L482 AbstractCegarLoop]: Abstraction has 2238 states and 8205 transitions. [2021-06-05 15:11:45,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:45,606 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 8205 transitions. [2021-06-05 15:11:45,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:45,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:45,609 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:45,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-06-05 15:11:45,809 INFO L430 AbstractCegarLoop]: === Iteration 280 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:45,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:45,809 INFO L82 PathProgramCache]: Analyzing trace with hash -965943366, now seen corresponding path program 153 times [2021-06-05 15:11:45,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:45,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567894700] [2021-06-05 15:11:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:45,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:45,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567894700] [2021-06-05 15:11:45,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567894700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:45,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98707895] [2021-06-05 15:11:45,995 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:46,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:11:46,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:46,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:46,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:46,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:46,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:11:46,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:46,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:46,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:46,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:11:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:46,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98707895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:46,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:46,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:11:46,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626726564] [2021-06-05 15:11:46,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:46,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:46,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:46,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:46,272 INFO L87 Difference]: Start difference. First operand 2238 states and 8205 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:46,531 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 15:11:47,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:47,446 INFO L93 Difference]: Finished difference Result 2712 states and 9639 transitions. [2021-06-05 15:11:47,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:11:47,447 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:47,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:47,451 INFO L225 Difference]: With dead ends: 2712 [2021-06-05 15:11:47,451 INFO L226 Difference]: Without dead ends: 2677 [2021-06-05 15:11:47,451 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 998.0ms TimeCoverageRelationStatistics Valid=281, Invalid=1699, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:11:47,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2677 states. [2021-06-05 15:11:47,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2677 to 2240. [2021-06-05 15:11:47,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 3.6677087985707906) internal successors, (8212), 2239 states have internal predecessors, (8212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:47,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 8212 transitions. [2021-06-05 15:11:47,478 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 8212 transitions. Word has length 24 [2021-06-05 15:11:47,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:47,478 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 8212 transitions. [2021-06-05 15:11:47,478 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:47,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 8212 transitions. [2021-06-05 15:11:47,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:47,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:47,481 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:47,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-05 15:11:47,681 INFO L430 AbstractCegarLoop]: === Iteration 281 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:47,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:47,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1799681806, now seen corresponding path program 154 times [2021-06-05 15:11:47,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:47,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659431916] [2021-06-05 15:11:47,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:47,853 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:47,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:47,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659431916] [2021-06-05 15:11:47,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659431916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:47,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131292360] [2021-06-05 15:11:47,853 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:47,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:47,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:47,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:47,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:48,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:48,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:48,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:48,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:48,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:11:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:48,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131292360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:48,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:48,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:11:48,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313732727] [2021-06-05 15:11:48,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:11:48,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:48,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:11:48,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:11:48,056 INFO L87 Difference]: Start difference. First operand 2240 states and 8212 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:48,288 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2021-06-05 15:11:49,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:49,060 INFO L93 Difference]: Finished difference Result 2727 states and 9699 transitions. [2021-06-05 15:11:49,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:11:49,060 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:49,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:49,064 INFO L225 Difference]: With dead ends: 2727 [2021-06-05 15:11:49,064 INFO L226 Difference]: Without dead ends: 2703 [2021-06-05 15:11:49,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 893.3ms TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:11:49,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2021-06-05 15:11:49,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2237. [2021-06-05 15:11:49,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2237 states, 2236 states have (on average 3.6686046511627906) internal successors, (8203), 2236 states have internal predecessors, (8203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:49,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2237 states to 2237 states and 8203 transitions. [2021-06-05 15:11:49,092 INFO L78 Accepts]: Start accepts. Automaton has 2237 states and 8203 transitions. Word has length 24 [2021-06-05 15:11:49,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:49,092 INFO L482 AbstractCegarLoop]: Abstraction has 2237 states and 8203 transitions. [2021-06-05 15:11:49,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:49,092 INFO L276 IsEmpty]: Start isEmpty. Operand 2237 states and 8203 transitions. [2021-06-05 15:11:49,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:49,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:49,095 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:49,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:49,295 INFO L430 AbstractCegarLoop]: === Iteration 282 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:49,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:49,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1662660090, now seen corresponding path program 155 times [2021-06-05 15:11:49,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:49,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786792411] [2021-06-05 15:11:49,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:49,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:49,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786792411] [2021-06-05 15:11:49,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786792411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:49,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004177747] [2021-06-05 15:11:49,454 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:49,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:11:49,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:49,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:49,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:49,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:49,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:49,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:49,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:49,588 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:11:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:49,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004177747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:49,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:49,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:11:49,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300340915] [2021-06-05 15:11:49,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:11:49,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:49,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:11:49,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:11:49,651 INFO L87 Difference]: Start difference. First operand 2237 states and 8203 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:50,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:50,637 INFO L93 Difference]: Finished difference Result 2663 states and 9503 transitions. [2021-06-05 15:11:50,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:11:50,638 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:50,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:50,642 INFO L225 Difference]: With dead ends: 2663 [2021-06-05 15:11:50,642 INFO L226 Difference]: Without dead ends: 2637 [2021-06-05 15:11:50,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 862.3ms TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:11:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2021-06-05 15:11:50,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 2241. [2021-06-05 15:11:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2240 states have (on average 3.6669642857142857) internal successors, (8214), 2240 states have internal predecessors, (8214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:50,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 8214 transitions. [2021-06-05 15:11:50,681 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 8214 transitions. Word has length 24 [2021-06-05 15:11:50,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:50,681 INFO L482 AbstractCegarLoop]: Abstraction has 2241 states and 8214 transitions. [2021-06-05 15:11:50,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:50,681 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 8214 transitions. [2021-06-05 15:11:50,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:50,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:50,684 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:50,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:50,885 INFO L430 AbstractCegarLoop]: === Iteration 283 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:50,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:50,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1986246268, now seen corresponding path program 156 times [2021-06-05 15:11:50,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:50,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292176138] [2021-06-05 15:11:50,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:51,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:51,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:51,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292176138] [2021-06-05 15:11:51,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292176138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:51,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598546172] [2021-06-05 15:11:51,045 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 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:51,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:11:51,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:51,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:51,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:51,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:51,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:11:51,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:51,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:51,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:51,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:11:51,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:51,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598546172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:51,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:51,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:11:51,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288665882] [2021-06-05 15:11:51,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:51,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:51,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:51,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:51,316 INFO L87 Difference]: Start difference. First operand 2241 states and 8214 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:51,591 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 47 [2021-06-05 15:11:52,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:52,684 INFO L93 Difference]: Finished difference Result 2693 states and 9554 transitions. [2021-06-05 15:11:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:11:52,685 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:52,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:52,689 INFO L225 Difference]: With dead ends: 2693 [2021-06-05 15:11:52,689 INFO L226 Difference]: Without dead ends: 2665 [2021-06-05 15:11:52,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 1231.7ms TimeCoverageRelationStatistics Valid=352, Invalid=1718, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:11:52,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-06-05 15:11:52,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2248. [2021-06-05 15:11:52,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 3.6653315531820203) internal successors, (8236), 2247 states have internal predecessors, (8236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:52,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 8236 transitions. [2021-06-05 15:11:52,716 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 8236 transitions. Word has length 24 [2021-06-05 15:11:52,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:52,716 INFO L482 AbstractCegarLoop]: Abstraction has 2248 states and 8236 transitions. [2021-06-05 15:11:52,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 8236 transitions. [2021-06-05 15:11:52,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:52,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:52,719 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:52,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable517,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:52,920 INFO L430 AbstractCegarLoop]: === Iteration 284 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:52,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:52,920 INFO L82 PathProgramCache]: Analyzing trace with hash -622976906, now seen corresponding path program 157 times [2021-06-05 15:11:52,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:52,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234938936] [2021-06-05 15:11:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:53,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:53,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234938936] [2021-06-05 15:11:53,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234938936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:53,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282645177] [2021-06-05 15:11:53,093 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:53,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:53,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:53,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:53,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:53,226 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:53,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:53,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:11:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:53,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282645177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:53,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:53,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:11:53,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857619119] [2021-06-05 15:11:53,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:11:53,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:53,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:11:53,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:11:53,285 INFO L87 Difference]: Start difference. First operand 2248 states and 8236 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:54,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:54,222 INFO L93 Difference]: Finished difference Result 2567 states and 9221 transitions. [2021-06-05 15:11:54,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:11:54,222 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:54,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:54,226 INFO L225 Difference]: With dead ends: 2567 [2021-06-05 15:11:54,226 INFO L226 Difference]: Without dead ends: 2550 [2021-06-05 15:11:54,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 824.1ms TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:11:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2021-06-05 15:11:54,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 2242. [2021-06-05 15:11:54,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 3.6675591253904507) internal successors, (8219), 2241 states have internal predecessors, (8219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 8219 transitions. [2021-06-05 15:11:54,252 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 8219 transitions. Word has length 24 [2021-06-05 15:11:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:54,253 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 8219 transitions. [2021-06-05 15:11:54,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:54,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 8219 transitions. [2021-06-05 15:11:54,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:54,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:54,255 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:54,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable520 [2021-06-05 15:11:54,456 INFO L430 AbstractCegarLoop]: === Iteration 285 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:54,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:54,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1959736906, now seen corresponding path program 158 times [2021-06-05 15:11:54,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:54,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668837791] [2021-06-05 15:11:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:54,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:54,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:54,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668837791] [2021-06-05 15:11:54,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668837791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:54,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749945687] [2021-06-05 15:11:54,616 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:54,641 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:54,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:54,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:54,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:54,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:54,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:54,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:54,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:54,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:11:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:54,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749945687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:54,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:54,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:11:54,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152307638] [2021-06-05 15:11:54,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:11:54,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:54,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:11:54,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:11:54,815 INFO L87 Difference]: Start difference. First operand 2242 states and 8219 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:55,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:55,838 INFO L93 Difference]: Finished difference Result 2691 states and 9584 transitions. [2021-06-05 15:11:55,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:11:55,838 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:55,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:55,842 INFO L225 Difference]: With dead ends: 2691 [2021-06-05 15:11:55,842 INFO L226 Difference]: Without dead ends: 2665 [2021-06-05 15:11:55,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 838.3ms TimeCoverageRelationStatistics Valid=278, Invalid=1444, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:11:55,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2665 states. [2021-06-05 15:11:55,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2665 to 2242. [2021-06-05 15:11:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 3.6675591253904507) internal successors, (8219), 2241 states have internal predecessors, (8219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:55,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 8219 transitions. [2021-06-05 15:11:55,868 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 8219 transitions. Word has length 24 [2021-06-05 15:11:55,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:55,869 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 8219 transitions. [2021-06-05 15:11:55,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:55,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 8219 transitions. [2021-06-05 15:11:55,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:55,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:55,871 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:56,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-05 15:11:56,072 INFO L430 AbstractCegarLoop]: === Iteration 286 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:56,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:56,072 INFO L82 PathProgramCache]: Analyzing trace with hash 168875732, now seen corresponding path program 159 times [2021-06-05 15:11:56,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:56,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771576628] [2021-06-05 15:11:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:56,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:56,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771576628] [2021-06-05 15:11:56,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771576628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:56,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79073057] [2021-06-05 15:11:56,230 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:56,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:11:56,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:56,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:11:56,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:56,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:56,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:11:56,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:56,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:56,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:56,380 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:11:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:56,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79073057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:56,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:56,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:11:56,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048301950] [2021-06-05 15:11:56,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:11:56,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:56,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:11:56,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:56,499 INFO L87 Difference]: Start difference. First operand 2242 states and 8219 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:56,747 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-06-05 15:11:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:57,946 INFO L93 Difference]: Finished difference Result 2763 states and 9734 transitions. [2021-06-05 15:11:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 15:11:57,946 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:57,950 INFO L225 Difference]: With dead ends: 2763 [2021-06-05 15:11:57,950 INFO L226 Difference]: Without dead ends: 2735 [2021-06-05 15:11:57,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1280.2ms TimeCoverageRelationStatistics Valid=380, Invalid=2070, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:11:57,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2735 states. [2021-06-05 15:11:57,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2735 to 2242. [2021-06-05 15:11:57,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 3.6675591253904507) internal successors, (8219), 2241 states have internal predecessors, (8219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:57,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 8219 transitions. [2021-06-05 15:11:57,978 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 8219 transitions. Word has length 24 [2021-06-05 15:11:57,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:57,978 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 8219 transitions. [2021-06-05 15:11:57,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:57,978 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 8219 transitions. [2021-06-05 15:11:57,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:57,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:57,981 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:58,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable522,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:58,182 INFO L430 AbstractCegarLoop]: === Iteration 287 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:58,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:58,182 INFO L82 PathProgramCache]: Analyzing trace with hash 950709532, now seen corresponding path program 160 times [2021-06-05 15:11:58,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:58,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260306452] [2021-06-05 15:11:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:58,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:58,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260306452] [2021-06-05 15:11:58,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260306452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:58,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507897894] [2021-06-05 15:11:58,335 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:58,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:58,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:58,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:58,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:58,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:58,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:58,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:58,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:58,471 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:11:58,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:58,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507897894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:58,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:58,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:11:58,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185184879] [2021-06-05 15:11:58,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:11:58,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:58,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:11:58,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:11:58,532 INFO L87 Difference]: Start difference. First operand 2242 states and 8219 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:59,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:59,243 INFO L93 Difference]: Finished difference Result 2600 states and 9316 transitions. [2021-06-05 15:11:59,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:11:59,244 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:11:59,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:59,247 INFO L225 Difference]: With dead ends: 2600 [2021-06-05 15:11:59,247 INFO L226 Difference]: Without dead ends: 2586 [2021-06-05 15:11:59,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 673.1ms TimeCoverageRelationStatistics Valid=216, Invalid=1116, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:11:59,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2586 states. [2021-06-05 15:11:59,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2586 to 2242. [2021-06-05 15:11:59,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2242 states, 2241 states have (on average 3.6675591253904507) internal successors, (8219), 2241 states have internal predecessors, (8219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2242 states to 2242 states and 8219 transitions. [2021-06-05 15:11:59,275 INFO L78 Accepts]: Start accepts. Automaton has 2242 states and 8219 transitions. Word has length 24 [2021-06-05 15:11:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:59,275 INFO L482 AbstractCegarLoop]: Abstraction has 2242 states and 8219 transitions. [2021-06-05 15:11:59,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:59,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2242 states and 8219 transitions. [2021-06-05 15:11:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:11:59,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:59,278 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:59,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 15:11:59,479 INFO L430 AbstractCegarLoop]: === Iteration 288 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:11:59,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:59,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1895765076, now seen corresponding path program 161 times [2021-06-05 15:11:59,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:59,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205612736] [2021-06-05 15:11:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:59,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:59,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:59,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205612736] [2021-06-05 15:11:59,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205612736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:59,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59883466] [2021-06-05 15:11:59,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:59,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:11:59,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:59,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:59,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:59,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:11:59,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:59,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:59,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:59,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:11:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:59,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59883466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:59,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:59,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:11:59,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223425804] [2021-06-05 15:11:59,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:11:59,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:59,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:11:59,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:11:59,868 INFO L87 Difference]: Start difference. First operand 2242 states and 8219 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:00,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:00,786 INFO L93 Difference]: Finished difference Result 2624 states and 9395 transitions. [2021-06-05 15:12:00,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:12:00,786 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:00,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:00,790 INFO L225 Difference]: With dead ends: 2624 [2021-06-05 15:12:00,790 INFO L226 Difference]: Without dead ends: 2601 [2021-06-05 15:12:00,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 822.9ms TimeCoverageRelationStatistics Valid=257, Invalid=1383, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:12:00,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2601 states. [2021-06-05 15:12:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2601 to 2244. [2021-06-05 15:12:00,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2244 states, 2243 states have (on average 3.666518056174766) internal successors, (8224), 2243 states have internal predecessors, (8224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:00,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2244 states to 2244 states and 8224 transitions. [2021-06-05 15:12:00,817 INFO L78 Accepts]: Start accepts. Automaton has 2244 states and 8224 transitions. Word has length 24 [2021-06-05 15:12:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:00,817 INFO L482 AbstractCegarLoop]: Abstraction has 2244 states and 8224 transitions. [2021-06-05 15:12:00,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2244 states and 8224 transitions. [2021-06-05 15:12:00,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:00,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:00,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:01,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:01,020 INFO L430 AbstractCegarLoop]: === Iteration 289 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:01,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:01,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1419787772, now seen corresponding path program 162 times [2021-06-05 15:12:01,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:01,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819470182] [2021-06-05 15:12:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:01,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:01,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:01,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819470182] [2021-06-05 15:12:01,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819470182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:01,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829932034] [2021-06-05 15:12:01,178 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:01,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:12:01,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:01,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:01,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:01,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:12:01,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:01,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:01,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:01,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:12:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:01,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829932034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:01,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:01,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:12:01,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485673449] [2021-06-05 15:12:01,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:12:01,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:01,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:12:01,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:12:01,374 INFO L87 Difference]: Start difference. First operand 2244 states and 8224 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:02,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:02,242 INFO L93 Difference]: Finished difference Result 2641 states and 9443 transitions. [2021-06-05 15:12:02,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:12:02,242 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:02,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:02,246 INFO L225 Difference]: With dead ends: 2641 [2021-06-05 15:12:02,246 INFO L226 Difference]: Without dead ends: 2619 [2021-06-05 15:12:02,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 737.5ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:12:02,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-06-05 15:12:02,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 2243. [2021-06-05 15:12:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2243 states, 2242 states have (on average 3.6672613737734165) internal successors, (8222), 2242 states have internal predecessors, (8222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2243 states to 2243 states and 8222 transitions. [2021-06-05 15:12:02,272 INFO L78 Accepts]: Start accepts. Automaton has 2243 states and 8222 transitions. Word has length 24 [2021-06-05 15:12:02,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:02,273 INFO L482 AbstractCegarLoop]: Abstraction has 2243 states and 8222 transitions. [2021-06-05 15:12:02,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:02,273 INFO L276 IsEmpty]: Start isEmpty. Operand 2243 states and 8222 transitions. [2021-06-05 15:12:02,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:02,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:02,275 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:02,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable527 [2021-06-05 15:12:02,476 INFO L430 AbstractCegarLoop]: === Iteration 290 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:02,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:02,476 INFO L82 PathProgramCache]: Analyzing trace with hash 613259036, now seen corresponding path program 93 times [2021-06-05 15:12:02,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:02,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591488089] [2021-06-05 15:12:02,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:02,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:02,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591488089] [2021-06-05 15:12:02,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591488089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:02,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777755881] [2021-06-05 15:12:02,667 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:02,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:12:02,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:02,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:02,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:02,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:02,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:12:02,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:02,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:02,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:02,854 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:12:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:02,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777755881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:02,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:02,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:12:02,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881842335] [2021-06-05 15:12:02,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:12:02,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:02,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:12:02,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:02,919 INFO L87 Difference]: Start difference. First operand 2243 states and 8222 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:03,521 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-06-05 15:12:05,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:05,726 INFO L93 Difference]: Finished difference Result 3179 states and 11053 transitions. [2021-06-05 15:12:05,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:12:05,727 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:05,731 INFO L225 Difference]: With dead ends: 3179 [2021-06-05 15:12:05,731 INFO L226 Difference]: Without dead ends: 3088 [2021-06-05 15:12:05,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 2400.7ms TimeCoverageRelationStatistics Valid=685, Invalid=4007, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:12:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3088 states. [2021-06-05 15:12:05,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3088 to 2264. [2021-06-05 15:12:05,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2264 states, 2263 states have (on average 3.664162615996465) internal successors, (8292), 2263 states have internal predecessors, (8292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:05,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2264 states to 2264 states and 8292 transitions. [2021-06-05 15:12:05,761 INFO L78 Accepts]: Start accepts. Automaton has 2264 states and 8292 transitions. Word has length 24 [2021-06-05 15:12:05,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:05,762 INFO L482 AbstractCegarLoop]: Abstraction has 2264 states and 8292 transitions. [2021-06-05 15:12:05,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:05,762 INFO L276 IsEmpty]: Start isEmpty. Operand 2264 states and 8292 transitions. [2021-06-05 15:12:05,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:05,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:05,764 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:05,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable528,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:05,965 INFO L430 AbstractCegarLoop]: === Iteration 291 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:05,965 INFO L82 PathProgramCache]: Analyzing trace with hash 830683922, now seen corresponding path program 94 times [2021-06-05 15:12:05,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:05,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558473217] [2021-06-05 15:12:05,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:06,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:06,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558473217] [2021-06-05 15:12:06,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558473217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:06,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311495874] [2021-06-05 15:12:06,147 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:06,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:06,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:06,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:06,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:06,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:12:06,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:06,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:06,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:06,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:12:06,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:06,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311495874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:06,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:06,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:12:06,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859219800] [2021-06-05 15:12:06,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:12:06,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:06,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:12:06,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:12:06,331 INFO L87 Difference]: Start difference. First operand 2264 states and 8292 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:06,664 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-06-05 15:12:08,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:08,369 INFO L93 Difference]: Finished difference Result 2991 states and 10538 transitions. [2021-06-05 15:12:08,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:12:08,369 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:08,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:08,374 INFO L225 Difference]: With dead ends: 2991 [2021-06-05 15:12:08,374 INFO L226 Difference]: Without dead ends: 2941 [2021-06-05 15:12:08,374 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 1797.3ms TimeCoverageRelationStatistics Valid=596, Invalid=2596, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:12:08,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2021-06-05 15:12:08,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2278. [2021-06-05 15:12:08,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2277 states have (on average 3.6644707949055775) internal successors, (8344), 2277 states have internal predecessors, (8344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 8344 transitions. [2021-06-05 15:12:08,402 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 8344 transitions. Word has length 24 [2021-06-05 15:12:08,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:08,402 INFO L482 AbstractCegarLoop]: Abstraction has 2278 states and 8344 transitions. [2021-06-05 15:12:08,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:08,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 8344 transitions. [2021-06-05 15:12:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:08,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:08,405 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:08,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2021-06-05 15:12:08,605 INFO L430 AbstractCegarLoop]: === Iteration 292 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:08,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:08,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1255427878, now seen corresponding path program 163 times [2021-06-05 15:12:08,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:08,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541858742] [2021-06-05 15:12:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:08,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:08,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:08,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541858742] [2021-06-05 15:12:08,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541858742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:08,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055376010] [2021-06-05 15:12:08,812 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:08,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:08,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:08,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:12:08,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:08,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:08,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:08,998 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:12:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:09,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055376010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:09,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:09,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:12:09,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494924604] [2021-06-05 15:12:09,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:09,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:09,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:09,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:09,026 INFO L87 Difference]: Start difference. First operand 2278 states and 8344 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:09,530 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-05 15:12:11,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:11,754 INFO L93 Difference]: Finished difference Result 3202 states and 11156 transitions. [2021-06-05 15:12:11,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:12:11,754 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:11,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:11,759 INFO L225 Difference]: With dead ends: 3202 [2021-06-05 15:12:11,759 INFO L226 Difference]: Without dead ends: 3150 [2021-06-05 15:12:11,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 2262.3ms TimeCoverageRelationStatistics Valid=736, Invalid=3820, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 15:12:11,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3150 states. [2021-06-05 15:12:11,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3150 to 2284. [2021-06-05 15:12:11,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 2283 states have (on average 3.6649145860709593) internal successors, (8367), 2283 states have internal predecessors, (8367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 8367 transitions. [2021-06-05 15:12:11,790 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 8367 transitions. Word has length 24 [2021-06-05 15:12:11,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:11,790 INFO L482 AbstractCegarLoop]: Abstraction has 2284 states and 8367 transitions. [2021-06-05 15:12:11,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:11,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 8367 transitions. [2021-06-05 15:12:11,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:11,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:11,793 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:11,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2021-06-05 15:12:11,993 INFO L430 AbstractCegarLoop]: === Iteration 293 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:11,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:11,993 INFO L82 PathProgramCache]: Analyzing trace with hash 227278018, now seen corresponding path program 164 times [2021-06-05 15:12:11,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:11,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124007215] [2021-06-05 15:12:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:12,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:12,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124007215] [2021-06-05 15:12:12,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124007215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:12,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650361802] [2021-06-05 15:12:12,162 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 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:12,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:12,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:12,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:12,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:12,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:12,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:12:12,317 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:12,326 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:12,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:12,327 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:12:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:12,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650361802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:12,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:12,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:12:12,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079923642] [2021-06-05 15:12:12,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:12,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:12,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:12,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:12,415 INFO L87 Difference]: Start difference. First operand 2284 states and 8367 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:12,943 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-05 15:12:13,503 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2021-06-05 15:12:14,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:14,779 INFO L93 Difference]: Finished difference Result 2986 states and 10490 transitions. [2021-06-05 15:12:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 15:12:14,780 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:14,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:14,784 INFO L225 Difference]: With dead ends: 2986 [2021-06-05 15:12:14,784 INFO L226 Difference]: Without dead ends: 2917 [2021-06-05 15:12:14,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1264 ImplicationChecksByTransitivity, 2103.6ms TimeCoverageRelationStatistics Valid=659, Invalid=3373, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 15:12:14,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2917 states. [2021-06-05 15:12:14,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2917 to 2288. [2021-06-05 15:12:14,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2288 states, 2287 states have (on average 3.6637516397026673) internal successors, (8379), 2287 states have internal predecessors, (8379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:14,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 8379 transitions. [2021-06-05 15:12:14,813 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 8379 transitions. Word has length 24 [2021-06-05 15:12:14,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:14,813 INFO L482 AbstractCegarLoop]: Abstraction has 2288 states and 8379 transitions. [2021-06-05 15:12:14,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:14,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 8379 transitions. [2021-06-05 15:12:14,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:14,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:14,816 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:15,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable533,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:15,017 INFO L430 AbstractCegarLoop]: === Iteration 294 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:15,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:15,017 INFO L82 PathProgramCache]: Analyzing trace with hash 550864196, now seen corresponding path program 165 times [2021-06-05 15:12:15,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:15,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904629816] [2021-06-05 15:12:15,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:15,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:15,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:15,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904629816] [2021-06-05 15:12:15,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904629816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:15,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452170446] [2021-06-05 15:12:15,186 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:15,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:12:15,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:15,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:15,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:15,343 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:15,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:12:15,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:15,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:15,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:15,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:12:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:15,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452170446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:15,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:15,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:12:15,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582191836] [2021-06-05 15:12:15,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:15,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:15,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:15,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:15,443 INFO L87 Difference]: Start difference. First operand 2288 states and 8379 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:15,979 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 15:12:16,546 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2021-06-05 15:12:17,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:17,977 INFO L93 Difference]: Finished difference Result 2940 states and 10329 transitions. [2021-06-05 15:12:17,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:12:17,977 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:17,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:17,982 INFO L225 Difference]: With dead ends: 2940 [2021-06-05 15:12:17,982 INFO L226 Difference]: Without dead ends: 2900 [2021-06-05 15:12:17,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 2235.8ms TimeCoverageRelationStatistics Valid=683, Invalid=3739, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:12:17,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2021-06-05 15:12:18,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 2296. [2021-06-05 15:12:18,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2296 states, 2295 states have (on average 3.6631808278867104) internal successors, (8407), 2295 states have internal predecessors, (8407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:18,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2296 states to 2296 states and 8407 transitions. [2021-06-05 15:12:18,024 INFO L78 Accepts]: Start accepts. Automaton has 2296 states and 8407 transitions. Word has length 24 [2021-06-05 15:12:18,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:18,025 INFO L482 AbstractCegarLoop]: Abstraction has 2296 states and 8407 transitions. [2021-06-05 15:12:18,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:18,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2296 states and 8407 transitions. [2021-06-05 15:12:18,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:18,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:18,028 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:18,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-05 15:12:18,228 INFO L430 AbstractCegarLoop]: === Iteration 295 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:18,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:18,228 INFO L82 PathProgramCache]: Analyzing trace with hash -2058358978, now seen corresponding path program 166 times [2021-06-05 15:12:18,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:18,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847371469] [2021-06-05 15:12:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:18,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:18,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847371469] [2021-06-05 15:12:18,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847371469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:18,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560091529] [2021-06-05 15:12:18,394 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:18,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:18,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:18,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:18,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:18,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:12:18,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:18,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:18,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:18,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:12:18,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:18,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560091529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:18,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:18,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:12:18,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310335975] [2021-06-05 15:12:18,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:12:18,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:18,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:12:18,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:12:18,580 INFO L87 Difference]: Start difference. First operand 2296 states and 8407 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:20,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:20,371 INFO L93 Difference]: Finished difference Result 2804 states and 9972 transitions. [2021-06-05 15:12:20,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:12:20,371 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:20,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:20,375 INFO L225 Difference]: With dead ends: 2804 [2021-06-05 15:12:20,375 INFO L226 Difference]: Without dead ends: 2783 [2021-06-05 15:12:20,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1527.5ms TimeCoverageRelationStatistics Valid=514, Invalid=2566, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 15:12:20,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2021-06-05 15:12:20,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 2280. [2021-06-05 15:12:20,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2280 states, 2279 states have (on average 3.6652040368582712) internal successors, (8353), 2279 states have internal predecessors, (8353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 8353 transitions. [2021-06-05 15:12:20,402 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 8353 transitions. Word has length 24 [2021-06-05 15:12:20,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:20,403 INFO L482 AbstractCegarLoop]: Abstraction has 2280 states and 8353 transitions. [2021-06-05 15:12:20,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 8353 transitions. [2021-06-05 15:12:20,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:20,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:20,405 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:20,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:20,606 INFO L430 AbstractCegarLoop]: === Iteration 296 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:20,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:20,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1599381192, now seen corresponding path program 95 times [2021-06-05 15:12:20,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:20,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608000995] [2021-06-05 15:12:20,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:20,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:20,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608000995] [2021-06-05 15:12:20,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608000995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:20,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015110892] [2021-06-05 15:12:20,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:20,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:12:20,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:20,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:20,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:20,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:12:20,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:20,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:20,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:20,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:12:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:20,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015110892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:20,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:20,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:12:20,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23726102] [2021-06-05 15:12:20,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:12:20,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:20,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:12:20,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:12:20,969 INFO L87 Difference]: Start difference. First operand 2280 states and 8353 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:23,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:23,571 INFO L93 Difference]: Finished difference Result 4178 states and 14207 transitions. [2021-06-05 15:12:23,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 15:12:23,571 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:23,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:23,578 INFO L225 Difference]: With dead ends: 4178 [2021-06-05 15:12:23,578 INFO L226 Difference]: Without dead ends: 4124 [2021-06-05 15:12:23,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1961 ImplicationChecksByTransitivity, 2223.0ms TimeCoverageRelationStatistics Valid=1073, Invalid=4627, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 15:12:23,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4124 states. [2021-06-05 15:12:23,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4124 to 2366. [2021-06-05 15:12:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2366 states, 2365 states have (on average 3.6841437632135308) internal successors, (8713), 2365 states have internal predecessors, (8713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:23,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2366 states to 2366 states and 8713 transitions. [2021-06-05 15:12:23,618 INFO L78 Accepts]: Start accepts. Automaton has 2366 states and 8713 transitions. Word has length 24 [2021-06-05 15:12:23,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:23,618 INFO L482 AbstractCegarLoop]: Abstraction has 2366 states and 8713 transitions. [2021-06-05 15:12:23,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:23,618 INFO L276 IsEmpty]: Start isEmpty. Operand 2366 states and 8713 transitions. [2021-06-05 15:12:23,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:23,622 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:23,622 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:23,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2021-06-05 15:12:23,822 INFO L430 AbstractCegarLoop]: === Iteration 297 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:23,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:23,822 INFO L82 PathProgramCache]: Analyzing trace with hash 904724930, now seen corresponding path program 96 times [2021-06-05 15:12:23,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:23,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840145990] [2021-06-05 15:12:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:24,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:24,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840145990] [2021-06-05 15:12:24,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840145990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:24,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782441710] [2021-06-05 15:12:24,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:24,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:12:24,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:24,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:24,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:24,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:24,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:12:24,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:24,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:24,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:24,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:12:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:24,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782441710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:24,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:24,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:12:24,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430408705] [2021-06-05 15:12:24,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:24,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:24,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:24,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:24,262 INFO L87 Difference]: Start difference. First operand 2366 states and 8713 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:25,030 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-06-05 15:12:26,934 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-06-05 15:12:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:27,912 INFO L93 Difference]: Finished difference Result 3774 states and 13082 transitions. [2021-06-05 15:12:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-06-05 15:12:27,913 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:27,919 INFO L225 Difference]: With dead ends: 3774 [2021-06-05 15:12:27,919 INFO L226 Difference]: Without dead ends: 3752 [2021-06-05 15:12:27,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2446 ImplicationChecksByTransitivity, 3215.0ms TimeCoverageRelationStatistics Valid=1227, Invalid=5579, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 15:12:27,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3752 states. [2021-06-05 15:12:27,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3752 to 2395. [2021-06-05 15:12:27,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 3.6875522138680035) internal successors, (8828), 2394 states have internal predecessors, (8828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:27,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 8828 transitions. [2021-06-05 15:12:27,955 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 8828 transitions. Word has length 24 [2021-06-05 15:12:27,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:27,955 INFO L482 AbstractCegarLoop]: Abstraction has 2395 states and 8828 transitions. [2021-06-05 15:12:27,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:27,955 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 8828 transitions. [2021-06-05 15:12:27,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:27,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:27,958 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:28,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-06-05 15:12:28,159 INFO L430 AbstractCegarLoop]: === Iteration 298 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:28,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:28,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1686558730, now seen corresponding path program 97 times [2021-06-05 15:12:28,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:28,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477348851] [2021-06-05 15:12:28,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:28,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:28,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477348851] [2021-06-05 15:12:28,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477348851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:28,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561192876] [2021-06-05 15:12:28,330 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:28,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:28,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:28,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:28,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:12:28,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:28,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:28,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:28,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:12:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:28,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561192876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:28,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:28,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:12:28,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111071606] [2021-06-05 15:12:28,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:12:28,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:28,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:12:28,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:12:28,527 INFO L87 Difference]: Start difference. First operand 2395 states and 8828 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:31,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:31,030 INFO L93 Difference]: Finished difference Result 3784 states and 13107 transitions. [2021-06-05 15:12:31,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 15:12:31,030 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:31,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:31,036 INFO L225 Difference]: With dead ends: 3784 [2021-06-05 15:12:31,037 INFO L226 Difference]: Without dead ends: 3728 [2021-06-05 15:12:31,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1963 ImplicationChecksByTransitivity, 2193.5ms TimeCoverageRelationStatistics Valid=938, Invalid=4612, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:12:31,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3728 states. [2021-06-05 15:12:31,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3728 to 2433. [2021-06-05 15:12:31,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2433 states, 2432 states have (on average 3.6969572368421053) internal successors, (8991), 2432 states have internal predecessors, (8991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:31,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2433 states to 2433 states and 8991 transitions. [2021-06-05 15:12:31,075 INFO L78 Accepts]: Start accepts. Automaton has 2433 states and 8991 transitions. Word has length 24 [2021-06-05 15:12:31,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:31,075 INFO L482 AbstractCegarLoop]: Abstraction has 2433 states and 8991 transitions. [2021-06-05 15:12:31,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:31,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2433 states and 8991 transitions. [2021-06-05 15:12:31,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:31,078 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:31,078 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:31,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:31,279 INFO L430 AbstractCegarLoop]: === Iteration 299 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:31,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:31,279 INFO L82 PathProgramCache]: Analyzing trace with hash 638091246, now seen corresponding path program 167 times [2021-06-05 15:12:31,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:31,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169423637] [2021-06-05 15:12:31,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:31,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:31,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:31,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169423637] [2021-06-05 15:12:31,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169423637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:31,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194853406] [2021-06-05 15:12:31,442 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:31,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:12:31,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:31,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:31,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:31,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:12:31,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:31,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:31,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:31,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:12:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:31,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194853406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:31,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:31,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:12:31,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114905766] [2021-06-05 15:12:31,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:12:31,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:31,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:12:31,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:12:31,629 INFO L87 Difference]: Start difference. First operand 2433 states and 8991 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:34,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:34,383 INFO L93 Difference]: Finished difference Result 4247 states and 14593 transitions. [2021-06-05 15:12:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:12:34,383 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:34,390 INFO L225 Difference]: With dead ends: 4247 [2021-06-05 15:12:34,390 INFO L226 Difference]: Without dead ends: 4186 [2021-06-05 15:12:34,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2142 ImplicationChecksByTransitivity, 2325.9ms TimeCoverageRelationStatistics Valid=1171, Invalid=5149, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 15:12:34,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2021-06-05 15:12:34,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 2486. [2021-06-05 15:12:34,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 3.719919517102616) internal successors, (9244), 2485 states have internal predecessors, (9244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:34,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 9244 transitions. [2021-06-05 15:12:34,428 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 9244 transitions. Word has length 24 [2021-06-05 15:12:34,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:34,428 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 9244 transitions. [2021-06-05 15:12:34,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:34,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 9244 transitions. [2021-06-05 15:12:34,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:34,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:34,431 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:34,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-05 15:12:34,632 INFO L430 AbstractCegarLoop]: === Iteration 300 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:34,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:34,632 INFO L82 PathProgramCache]: Analyzing trace with hash 961677424, now seen corresponding path program 168 times [2021-06-05 15:12:34,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:34,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346883387] [2021-06-05 15:12:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:34,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:34,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346883387] [2021-06-05 15:12:34,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346883387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:34,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600135596] [2021-06-05 15:12:34,799 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:34,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:12:34,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:34,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:34,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:34,944 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:34,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:12:34,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:34,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:34,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:34,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:12:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:35,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600135596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:35,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:35,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:12:35,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327451012] [2021-06-05 15:12:35,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:35,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:35,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:35,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:35,027 INFO L87 Difference]: Start difference. First operand 2486 states and 9244 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:37,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:37,661 INFO L93 Difference]: Finished difference Result 3963 states and 13816 transitions. [2021-06-05 15:12:37,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 15:12:37,661 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:37,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:37,668 INFO L225 Difference]: With dead ends: 3963 [2021-06-05 15:12:37,668 INFO L226 Difference]: Without dead ends: 3909 [2021-06-05 15:12:37,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 2210.9ms TimeCoverageRelationStatistics Valid=1022, Invalid=4830, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 15:12:37,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-06-05 15:12:37,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 2494. [2021-06-05 15:12:37,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2494 states, 2493 states have (on average 3.724027276373847) internal successors, (9284), 2493 states have internal predecessors, (9284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:37,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2494 states to 2494 states and 9284 transitions. [2021-06-05 15:12:37,709 INFO L78 Accepts]: Start accepts. Automaton has 2494 states and 9284 transitions. Word has length 24 [2021-06-05 15:12:37,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:37,709 INFO L482 AbstractCegarLoop]: Abstraction has 2494 states and 9284 transitions. [2021-06-05 15:12:37,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:37,709 INFO L276 IsEmpty]: Start isEmpty. Operand 2494 states and 9284 transitions. [2021-06-05 15:12:37,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:37,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:37,712 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:37,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable546,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:37,912 INFO L430 AbstractCegarLoop]: === Iteration 301 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:37,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:37,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1498600092, now seen corresponding path program 98 times [2021-06-05 15:12:37,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:37,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317619026] [2021-06-05 15:12:37,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:38,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:38,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317619026] [2021-06-05 15:12:38,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317619026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:38,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020881240] [2021-06-05 15:12:38,085 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:38,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:38,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:38,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:38,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:38,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:38,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:12:38,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:38,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:38,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:38,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:12:38,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:38,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020881240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:38,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:38,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:12:38,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522471080] [2021-06-05 15:12:38,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:38,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:38,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:38,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:38,324 INFO L87 Difference]: Start difference. First operand 2494 states and 9284 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:41,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:41,317 INFO L93 Difference]: Finished difference Result 4202 states and 14799 transitions. [2021-06-05 15:12:41,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 15:12:41,317 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:41,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:41,324 INFO L225 Difference]: With dead ends: 4202 [2021-06-05 15:12:41,324 INFO L226 Difference]: Without dead ends: 4168 [2021-06-05 15:12:41,324 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 2523.9ms TimeCoverageRelationStatistics Valid=988, Invalid=5332, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 15:12:41,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-05 15:12:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 2769. [2021-06-05 15:12:41,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2769 states, 2768 states have (on average 3.7846820809248554) internal successors, (10476), 2768 states have internal predecessors, (10476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:41,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2769 states to 2769 states and 10476 transitions. [2021-06-05 15:12:41,370 INFO L78 Accepts]: Start accepts. Automaton has 2769 states and 10476 transitions. Word has length 24 [2021-06-05 15:12:41,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:41,370 INFO L482 AbstractCegarLoop]: Abstraction has 2769 states and 10476 transitions. [2021-06-05 15:12:41,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:41,370 INFO L276 IsEmpty]: Start isEmpty. Operand 2769 states and 10476 transitions. [2021-06-05 15:12:41,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:41,373 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:41,373 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:41,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable548 [2021-06-05 15:12:41,574 INFO L430 AbstractCegarLoop]: === Iteration 302 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:41,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:41,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1293681958, now seen corresponding path program 169 times [2021-06-05 15:12:41,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:41,574 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863326529] [2021-06-05 15:12:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:41,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:41,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:41,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863326529] [2021-06-05 15:12:41,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863326529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:41,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588430298] [2021-06-05 15:12:41,749 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:41,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:41,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:41,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:41,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:12:41,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:41,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:41,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:41,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:12:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:41,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588430298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:41,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:41,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:12:41,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728907888] [2021-06-05 15:12:41,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:12:41,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:41,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:12:41,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:12:41,933 INFO L87 Difference]: Start difference. First operand 2769 states and 10476 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:44,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:44,697 INFO L93 Difference]: Finished difference Result 4592 states and 16115 transitions. [2021-06-05 15:12:44,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 15:12:44,697 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:44,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:44,705 INFO L225 Difference]: With dead ends: 4592 [2021-06-05 15:12:44,705 INFO L226 Difference]: Without dead ends: 4538 [2021-06-05 15:12:44,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 2268.7ms TimeCoverageRelationStatistics Valid=1040, Invalid=4510, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:12:44,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2021-06-05 15:12:44,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 2781. [2021-06-05 15:12:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2781 states, 2780 states have (on average 3.7827338129496404) internal successors, (10516), 2780 states have internal predecessors, (10516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:44,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2781 states to 2781 states and 10516 transitions. [2021-06-05 15:12:44,752 INFO L78 Accepts]: Start accepts. Automaton has 2781 states and 10516 transitions. Word has length 24 [2021-06-05 15:12:44,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:44,752 INFO L482 AbstractCegarLoop]: Abstraction has 2781 states and 10516 transitions. [2021-06-05 15:12:44,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:44,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2781 states and 10516 transitions. [2021-06-05 15:12:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:44,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:44,756 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:44,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:44,956 INFO L430 AbstractCegarLoop]: === Iteration 303 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:44,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:44,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1026428984, now seen corresponding path program 170 times [2021-06-05 15:12:44,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:44,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215605585] [2021-06-05 15:12:44,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:45,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:45,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215605585] [2021-06-05 15:12:45,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215605585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:45,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348069296] [2021-06-05 15:12:45,170 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:45,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:45,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:45,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:45,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:45,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:12:45,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:12:45,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:12:45,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:45,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:45,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:45,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:12:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:45,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348069296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:45,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:45,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:12:45,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452704909] [2021-06-05 15:12:45,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:12:45,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:45,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:12:45,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:45,464 INFO L87 Difference]: Start difference. First operand 2781 states and 10516 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:45,733 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-06-05 15:12:46,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:46,939 INFO L93 Difference]: Finished difference Result 3378 states and 12278 transitions. [2021-06-05 15:12:46,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:12:46,940 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:46,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:46,945 INFO L225 Difference]: With dead ends: 3378 [2021-06-05 15:12:46,945 INFO L226 Difference]: Without dead ends: 3328 [2021-06-05 15:12:46,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1338.8ms TimeCoverageRelationStatistics Valid=357, Invalid=2093, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:12:46,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3328 states. [2021-06-05 15:12:46,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3328 to 2785. [2021-06-05 15:12:46,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 2784 states have (on average 3.7819683908045976) internal successors, (10529), 2784 states have internal predecessors, (10529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:46,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 10529 transitions. [2021-06-05 15:12:46,983 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 10529 transitions. Word has length 24 [2021-06-05 15:12:46,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:46,983 INFO L482 AbstractCegarLoop]: Abstraction has 2785 states and 10529 transitions. [2021-06-05 15:12:46,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:46,983 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 10529 transitions. [2021-06-05 15:12:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:46,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:46,986 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:47,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-06-05 15:12:47,187 INFO L430 AbstractCegarLoop]: === Iteration 304 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:47,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:47,187 INFO L82 PathProgramCache]: Analyzing trace with hash -2054578844, now seen corresponding path program 171 times [2021-06-05 15:12:47,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:47,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748497225] [2021-06-05 15:12:47,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:47,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:47,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748497225] [2021-06-05 15:12:47,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748497225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:47,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139381938] [2021-06-05 15:12:47,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:47,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:12:47,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:47,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:47,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:47,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:47,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:12:47,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:47,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:47,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:47,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:12:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:47,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139381938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:47,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:47,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:12:47,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328508965] [2021-06-05 15:12:47,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:47,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:47,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:47,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:47,637 INFO L87 Difference]: Start difference. First operand 2785 states and 10529 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:47,939 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-05 15:12:49,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:49,196 INFO L93 Difference]: Finished difference Result 3256 states and 11952 transitions. [2021-06-05 15:12:49,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:12:49,197 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:49,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:49,202 INFO L225 Difference]: With dead ends: 3256 [2021-06-05 15:12:49,202 INFO L226 Difference]: Without dead ends: 3220 [2021-06-05 15:12:49,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1371.1ms TimeCoverageRelationStatistics Valid=371, Invalid=1981, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:12:49,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-06-05 15:12:49,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 2790. [2021-06-05 15:12:49,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2789 states have (on average 3.7805665112943707) internal successors, (10544), 2789 states have internal predecessors, (10544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:49,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 10544 transitions. [2021-06-05 15:12:49,237 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 10544 transitions. Word has length 24 [2021-06-05 15:12:49,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:49,237 INFO L482 AbstractCegarLoop]: Abstraction has 2790 states and 10544 transitions. [2021-06-05 15:12:49,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:49,237 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 10544 transitions. [2021-06-05 15:12:49,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:49,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:49,241 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:49,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 15:12:49,441 INFO L430 AbstractCegarLoop]: === Iteration 305 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:49,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:49,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1730992666, now seen corresponding path program 172 times [2021-06-05 15:12:49,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:49,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396556896] [2021-06-05 15:12:49,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:49,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:49,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:49,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396556896] [2021-06-05 15:12:49,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396556896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:49,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195994825] [2021-06-05 15:12:49,614 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:49,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:49,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:49,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:49,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:49,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:12:49,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:49,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:49,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:49,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:12:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:49,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195994825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:49,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:49,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:12:49,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699390664] [2021-06-05 15:12:49,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:12:49,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:49,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:12:49,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:12:49,828 INFO L87 Difference]: Start difference. First operand 2790 states and 10544 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:50,066 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-06-05 15:12:51,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:51,068 INFO L93 Difference]: Finished difference Result 3207 states and 11839 transitions. [2021-06-05 15:12:51,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:12:51,068 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:51,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:51,073 INFO L225 Difference]: With dead ends: 3207 [2021-06-05 15:12:51,073 INFO L226 Difference]: Without dead ends: 3182 [2021-06-05 15:12:51,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1099.8ms TimeCoverageRelationStatistics Valid=309, Invalid=1583, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:12:51,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-06-05 15:12:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 2783. [2021-06-05 15:12:51,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 3.782530553558591) internal successors, (10523), 2782 states have internal predecessors, (10523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:51,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 10523 transitions. [2021-06-05 15:12:51,108 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 10523 transitions. Word has length 24 [2021-06-05 15:12:51,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:51,108 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 10523 transitions. [2021-06-05 15:12:51,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:51,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 10523 transitions. [2021-06-05 15:12:51,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:51,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:51,112 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:51,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable555 [2021-06-05 15:12:51,312 INFO L430 AbstractCegarLoop]: === Iteration 306 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:51,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:51,312 INFO L82 PathProgramCache]: Analyzing trace with hash -406982280, now seen corresponding path program 173 times [2021-06-05 15:12:51,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:51,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863442513] [2021-06-05 15:12:51,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:51,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:51,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:51,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863442513] [2021-06-05 15:12:51,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863442513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:51,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415989864] [2021-06-05 15:12:51,522 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:51,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:51,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:51,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:51,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:51,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:12:51,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:51,715 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:51,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:51,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:12:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:51,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415989864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:51,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:51,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:12:51,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383247969] [2021-06-05 15:12:51,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:51,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:51,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:51,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:51,745 INFO L87 Difference]: Start difference. First operand 2783 states and 10523 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:52,035 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2021-06-05 15:12:53,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:53,579 INFO L93 Difference]: Finished difference Result 3338 states and 12184 transitions. [2021-06-05 15:12:53,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:12:53,580 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:53,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:53,585 INFO L225 Difference]: With dead ends: 3338 [2021-06-05 15:12:53,585 INFO L226 Difference]: Without dead ends: 3302 [2021-06-05 15:12:53,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1450.1ms TimeCoverageRelationStatistics Valid=390, Invalid=2366, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:12:53,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3302 states. [2021-06-05 15:12:53,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3302 to 2785. [2021-06-05 15:12:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2785 states, 2784 states have (on average 3.7819683908045976) internal successors, (10529), 2784 states have internal predecessors, (10529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 10529 transitions. [2021-06-05 15:12:53,620 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 10529 transitions. Word has length 24 [2021-06-05 15:12:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:53,620 INFO L482 AbstractCegarLoop]: Abstraction has 2785 states and 10529 transitions. [2021-06-05 15:12:53,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 10529 transitions. [2021-06-05 15:12:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:53,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:53,623 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:53,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:53,824 INFO L430 AbstractCegarLoop]: === Iteration 307 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:53,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:53,824 INFO L82 PathProgramCache]: Analyzing trace with hash -189557394, now seen corresponding path program 174 times [2021-06-05 15:12:53,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:53,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444922435] [2021-06-05 15:12:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:54,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:54,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444922435] [2021-06-05 15:12:54,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444922435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:54,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427854882] [2021-06-05 15:12:54,001 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:54,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:12:54,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:54,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 15:12:54,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:54,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:12:54,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:54,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-05 15:12:54,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:54,196 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:54,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:54,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:36, output treesize:350 [2021-06-05 15:12:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:54,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427854882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:54,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:54,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:12:54,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562272336] [2021-06-05 15:12:54,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:12:54,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:54,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:12:54,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:54,482 INFO L87 Difference]: Start difference. First operand 2785 states and 10529 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:54,934 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 49 [2021-06-05 15:12:56,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:56,831 INFO L93 Difference]: Finished difference Result 3326 states and 12143 transitions. [2021-06-05 15:12:56,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:12:56,831 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:56,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:56,836 INFO L225 Difference]: With dead ends: 3326 [2021-06-05 15:12:56,836 INFO L226 Difference]: Without dead ends: 3290 [2021-06-05 15:12:56,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 2163.3ms TimeCoverageRelationStatistics Valid=548, Invalid=2644, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 15:12:56,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2021-06-05 15:12:56,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2794. [2021-06-05 15:12:56,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2794 states, 2793 states have (on average 3.779090583601862) internal successors, (10555), 2793 states have internal predecessors, (10555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:56,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 10555 transitions. [2021-06-05 15:12:56,871 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 10555 transitions. Word has length 24 [2021-06-05 15:12:56,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:56,871 INFO L482 AbstractCegarLoop]: Abstraction has 2794 states and 10555 transitions. [2021-06-05 15:12:56,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:56,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 10555 transitions. [2021-06-05 15:12:56,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:56,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:56,875 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:57,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-06-05 15:12:57,075 INFO L430 AbstractCegarLoop]: === Iteration 308 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:57,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:57,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1023295834, now seen corresponding path program 175 times [2021-06-05 15:12:57,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:57,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059053549] [2021-06-05 15:12:57,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:57,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:57,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059053549] [2021-06-05 15:12:57,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059053549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:57,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282297891] [2021-06-05 15:12:57,244 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:57,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:57,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:57,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:12:57,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:57,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:57,393 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:57,393 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:12:57,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:57,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282297891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:57,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:57,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:12:57,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268245716] [2021-06-05 15:12:57,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:12:57,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:57,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:12:57,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:12:57,441 INFO L87 Difference]: Start difference. First operand 2794 states and 10555 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:57,711 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2021-06-05 15:12:58,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:58,956 INFO L93 Difference]: Finished difference Result 3320 states and 12153 transitions. [2021-06-05 15:12:58,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:12:58,956 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:12:58,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:58,961 INFO L225 Difference]: With dead ends: 3320 [2021-06-05 15:12:58,961 INFO L226 Difference]: Without dead ends: 3296 [2021-06-05 15:12:58,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1210.3ms TimeCoverageRelationStatistics Valid=371, Invalid=2079, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:12:58,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2021-06-05 15:12:58,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 2790. [2021-06-05 15:12:58,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2789 states have (on average 3.779849408390104) internal successors, (10542), 2789 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:58,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 10542 transitions. [2021-06-05 15:12:58,996 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 10542 transitions. Word has length 24 [2021-06-05 15:12:58,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:58,996 INFO L482 AbstractCegarLoop]: Abstraction has 2790 states and 10542 transitions. [2021-06-05 15:12:58,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:58,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 10542 transitions. [2021-06-05 15:12:58,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:12:58,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:58,999 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:59,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-06-05 15:12:59,200 INFO L430 AbstractCegarLoop]: === Iteration 309 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:12:59,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:59,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1855921234, now seen corresponding path program 176 times [2021-06-05 15:12:59,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:59,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721976761] [2021-06-05 15:12:59,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:59,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:59,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721976761] [2021-06-05 15:12:59,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721976761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:59,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788652165] [2021-06-05 15:12:59,357 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:59,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:59,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:59,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:59,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:59,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:59,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:12:59,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:59,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:59,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:59,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:12:59,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:59,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788652165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:59,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:59,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:12:59,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549659255] [2021-06-05 15:12:59,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:12:59,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:59,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:12:59,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:59,617 INFO L87 Difference]: Start difference. First operand 2790 states and 10542 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:59,913 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-06-05 15:13:00,350 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2021-06-05 15:13:01,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:01,277 INFO L93 Difference]: Finished difference Result 3245 states and 11918 transitions. [2021-06-05 15:13:01,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:13:01,277 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:01,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:01,282 INFO L225 Difference]: With dead ends: 3245 [2021-06-05 15:13:01,282 INFO L226 Difference]: Without dead ends: 3219 [2021-06-05 15:13:01,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1403.1ms TimeCoverageRelationStatistics Valid=364, Invalid=1892, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:13:01,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2021-06-05 15:13:01,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 2794. [2021-06-05 15:13:01,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2794 states, 2793 states have (on average 3.778374507697816) internal successors, (10553), 2793 states have internal predecessors, (10553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:01,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2794 states to 2794 states and 10553 transitions. [2021-06-05 15:13:01,317 INFO L78 Accepts]: Start accepts. Automaton has 2794 states and 10553 transitions. Word has length 24 [2021-06-05 15:13:01,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:01,317 INFO L482 AbstractCegarLoop]: Abstraction has 2794 states and 10553 transitions. [2021-06-05 15:13:01,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:01,317 INFO L276 IsEmpty]: Start isEmpty. Operand 2794 states and 10553 transitions. [2021-06-05 15:13:01,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:01,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:01,320 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:01,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-05 15:13:01,521 INFO L430 AbstractCegarLoop]: === Iteration 310 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:01,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:01,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1532335056, now seen corresponding path program 177 times [2021-06-05 15:13:01,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:01,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105938747] [2021-06-05 15:13:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:01,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:01,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105938747] [2021-06-05 15:13:01,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105938747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:01,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138584305] [2021-06-05 15:13:01,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:01,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:13:01,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:01,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:13:01,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:01,813 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:01,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:13:01,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:01,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:01,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:01,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:13:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:01,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138584305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:01,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:01,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:13:01,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406022443] [2021-06-05 15:13:01,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:13:01,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:01,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:13:01,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:13:01,944 INFO L87 Difference]: Start difference. First operand 2794 states and 10553 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:02,231 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 15:13:02,654 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2021-06-05 15:13:03,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:03,512 INFO L93 Difference]: Finished difference Result 3212 states and 11807 transitions. [2021-06-05 15:13:03,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:13:03,512 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:03,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:03,518 INFO L225 Difference]: With dead ends: 3212 [2021-06-05 15:13:03,518 INFO L226 Difference]: Without dead ends: 3194 [2021-06-05 15:13:03,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 1368.7ms TimeCoverageRelationStatistics Valid=338, Invalid=1824, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:13:03,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3194 states. [2021-06-05 15:13:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 2797. [2021-06-05 15:13:03,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2796 states have (on average 3.7775393419170245) internal successors, (10562), 2796 states have internal predecessors, (10562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 10562 transitions. [2021-06-05 15:13:03,560 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 10562 transitions. Word has length 24 [2021-06-05 15:13:03,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:03,560 INFO L482 AbstractCegarLoop]: Abstraction has 2797 states and 10562 transitions. [2021-06-05 15:13:03,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:03,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 10562 transitions. [2021-06-05 15:13:03,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:03,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:03,564 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:03,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:03,765 INFO L430 AbstractCegarLoop]: === Iteration 311 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:03,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:03,765 INFO L82 PathProgramCache]: Analyzing trace with hash 153409066, now seen corresponding path program 178 times [2021-06-05 15:13:03,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:03,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459541844] [2021-06-05 15:13:03,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:03,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:03,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459541844] [2021-06-05 15:13:03,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459541844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:03,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848073789] [2021-06-05 15:13:03,917 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:03,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:13:03,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:03,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:03,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:04,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:04,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:04,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:04,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:04,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:13:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:04,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848073789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:04,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:04,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:13:04,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772127492] [2021-06-05 15:13:04,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:13:04,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:04,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:13:04,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:13:04,109 INFO L87 Difference]: Start difference. First operand 2797 states and 10562 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:04,748 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-06-05 15:13:05,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:05,392 INFO L93 Difference]: Finished difference Result 3156 states and 11659 transitions. [2021-06-05 15:13:05,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:13:05,392 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:05,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:05,398 INFO L225 Difference]: With dead ends: 3156 [2021-06-05 15:13:05,398 INFO L226 Difference]: Without dead ends: 3139 [2021-06-05 15:13:05,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1059.9ms TimeCoverageRelationStatistics Valid=269, Invalid=1453, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:13:05,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2021-06-05 15:13:05,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 2791. [2021-06-05 15:13:05,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.7795698924731185) internal successors, (10545), 2790 states have internal predecessors, (10545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:05,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10545 transitions. [2021-06-05 15:13:05,433 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10545 transitions. Word has length 24 [2021-06-05 15:13:05,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:05,434 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 10545 transitions. [2021-06-05 15:13:05,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:05,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10545 transitions. [2021-06-05 15:13:05,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:05,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:05,438 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:05,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 15:13:05,647 INFO L430 AbstractCegarLoop]: === Iteration 312 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:05,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:05,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1558844418, now seen corresponding path program 179 times [2021-06-05 15:13:05,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:05,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687079520] [2021-06-05 15:13:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:05,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:05,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:05,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687079520] [2021-06-05 15:13:05,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687079520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:05,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597567097] [2021-06-05 15:13:05,811 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:05,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:13:05,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:05,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:05,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:05,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:05,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:05,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:05,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:05,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:13:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:05,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597567097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:05,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:05,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:13:05,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008886125] [2021-06-05 15:13:05,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:05,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:05,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:05,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:05,999 INFO L87 Difference]: Start difference. First operand 2791 states and 10545 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:06,604 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-06-05 15:13:07,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:07,247 INFO L93 Difference]: Finished difference Result 3273 states and 12003 transitions. [2021-06-05 15:13:07,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:13:07,248 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:07,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:07,252 INFO L225 Difference]: With dead ends: 3273 [2021-06-05 15:13:07,253 INFO L226 Difference]: Without dead ends: 3247 [2021-06-05 15:13:07,253 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 1033.6ms TimeCoverageRelationStatistics Valid=311, Invalid=1581, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:13:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3247 states. [2021-06-05 15:13:07,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3247 to 2791. [2021-06-05 15:13:07,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.7795698924731185) internal successors, (10545), 2790 states have internal predecessors, (10545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10545 transitions. [2021-06-05 15:13:07,287 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10545 transitions. Word has length 24 [2021-06-05 15:13:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:07,288 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 10545 transitions. [2021-06-05 15:13:07,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:07,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10545 transitions. [2021-06-05 15:13:07,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:07,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:07,291 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:07,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 301 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-05 15:13:07,492 INFO L430 AbstractCegarLoop]: === Iteration 313 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:07,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:07,492 INFO L82 PathProgramCache]: Analyzing trace with hash 945261704, now seen corresponding path program 180 times [2021-06-05 15:13:07,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:07,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549537032] [2021-06-05 15:13:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:07,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:07,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:07,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549537032] [2021-06-05 15:13:07,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549537032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:07,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431565666] [2021-06-05 15:13:07,669 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 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:07,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:13:07,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:07,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:07,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:07,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:07,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:07,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:07,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:07,798 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:13:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:07,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431565666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:07,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:07,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:13:07,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491030370] [2021-06-05 15:13:07,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:07,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:07,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:07,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:07,858 INFO L87 Difference]: Start difference. First operand 2791 states and 10545 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:08,408 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 15:13:08,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:08,919 INFO L93 Difference]: Finished difference Result 3237 states and 11894 transitions. [2021-06-05 15:13:08,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:13:08,919 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:08,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:08,924 INFO L225 Difference]: With dead ends: 3237 [2021-06-05 15:13:08,924 INFO L226 Difference]: Without dead ends: 3215 [2021-06-05 15:13:08,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 916.8ms TimeCoverageRelationStatistics Valid=303, Invalid=1503, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:13:08,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3215 states. [2021-06-05 15:13:08,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3215 to 2791. [2021-06-05 15:13:08,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2790 states have (on average 3.7795698924731185) internal successors, (10545), 2790 states have internal predecessors, (10545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 10545 transitions. [2021-06-05 15:13:08,959 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 10545 transitions. Word has length 24 [2021-06-05 15:13:08,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:08,959 INFO L482 AbstractCegarLoop]: Abstraction has 2791 states and 10545 transitions. [2021-06-05 15:13:08,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:08,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 10545 transitions. [2021-06-05 15:13:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:08,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:08,963 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:09,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-06-05 15:13:09,164 INFO L430 AbstractCegarLoop]: === Iteration 314 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:09,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:09,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1622816248, now seen corresponding path program 181 times [2021-06-05 15:13:09,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:09,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098040000] [2021-06-05 15:13:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:09,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:09,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098040000] [2021-06-05 15:13:09,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098040000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:09,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895520161] [2021-06-05 15:13:09,323 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 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:09,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:09,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:09,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:09,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:09,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:09,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:09,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:13:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:09,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895520161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:09,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:09,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:13:09,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225934695] [2021-06-05 15:13:09,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:09,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:09,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:09,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:09,513 INFO L87 Difference]: Start difference. First operand 2791 states and 10545 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:10,130 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-06-05 15:13:10,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:10,770 INFO L93 Difference]: Finished difference Result 3213 states and 11832 transitions. [2021-06-05 15:13:10,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:13:10,770 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:10,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:10,776 INFO L225 Difference]: With dead ends: 3213 [2021-06-05 15:13:10,776 INFO L226 Difference]: Without dead ends: 3190 [2021-06-05 15:13:10,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1048.6ms TimeCoverageRelationStatistics Valid=309, Invalid=1671, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:13:10,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-06-05 15:13:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2793. [2021-06-05 15:13:10,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2793 states, 2792 states have (on average 3.7786532951289398) internal successors, (10550), 2792 states have internal predecessors, (10550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:10,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2793 states to 2793 states and 10550 transitions. [2021-06-05 15:13:10,810 INFO L78 Accepts]: Start accepts. Automaton has 2793 states and 10550 transitions. Word has length 24 [2021-06-05 15:13:10,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:10,810 INFO L482 AbstractCegarLoop]: Abstraction has 2793 states and 10550 transitions. [2021-06-05 15:13:10,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:10,810 INFO L276 IsEmpty]: Start isEmpty. Operand 2793 states and 10550 transitions. [2021-06-05 15:13:10,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:10,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:10,814 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:11,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:11,014 INFO L430 AbstractCegarLoop]: === Iteration 315 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:11,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:11,015 INFO L82 PathProgramCache]: Analyzing trace with hash -643401800, now seen corresponding path program 182 times [2021-06-05 15:13:11,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:11,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390551289] [2021-06-05 15:13:11,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:11,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:11,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390551289] [2021-06-05 15:13:11,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390551289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:11,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579648133] [2021-06-05 15:13:11,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:11,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:11,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:11,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:11,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:11,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:11,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:11,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:11,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:11,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:13:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:11,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579648133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:11,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:11,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:13:11,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036417567] [2021-06-05 15:13:11,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:11,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:11,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:11,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:11,396 INFO L87 Difference]: Start difference. First operand 2793 states and 10550 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:11,954 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 15:13:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:12,506 INFO L93 Difference]: Finished difference Result 3218 states and 11844 transitions. [2021-06-05 15:13:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:13:12,506 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:12,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:12,511 INFO L225 Difference]: With dead ends: 3218 [2021-06-05 15:13:12,511 INFO L226 Difference]: Without dead ends: 3196 [2021-06-05 15:13:12,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 953.6ms TimeCoverageRelationStatistics Valid=317, Invalid=1663, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:13:12,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3196 states. [2021-06-05 15:13:12,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3196 to 2790. [2021-06-05 15:13:12,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2790 states, 2789 states have (on average 3.779849408390104) internal successors, (10542), 2789 states have internal predecessors, (10542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:12,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2790 states to 2790 states and 10542 transitions. [2021-06-05 15:13:12,547 INFO L78 Accepts]: Start accepts. Automaton has 2790 states and 10542 transitions. Word has length 24 [2021-06-05 15:13:12,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:12,547 INFO L482 AbstractCegarLoop]: Abstraction has 2790 states and 10542 transitions. [2021-06-05 15:13:12,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:12,547 INFO L276 IsEmpty]: Start isEmpty. Operand 2790 states and 10542 transitions. [2021-06-05 15:13:12,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:12,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:12,551 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:12,751 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-05 15:13:12,751 INFO L430 AbstractCegarLoop]: === Iteration 316 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:12,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:12,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1889346820, now seen corresponding path program 99 times [2021-06-05 15:13:12,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:12,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932402463] [2021-06-05 15:13:12,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:12,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:12,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932402463] [2021-06-05 15:13:12,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932402463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:12,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223717713] [2021-06-05 15:13:12,919 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 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:12,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:13:12,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:12,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:13:12,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:13,074 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:13,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:13:13,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:13,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:13,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:13,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:13:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:13,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223717713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:13,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:13,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:13:13,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091603876] [2021-06-05 15:13:13,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:13:13,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:13,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:13:13,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:13:13,178 INFO L87 Difference]: Start difference. First operand 2790 states and 10542 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:13,659 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 37 [2021-06-05 15:13:13,930 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-06-05 15:13:16,505 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-06-05 15:13:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:17,073 INFO L93 Difference]: Finished difference Result 4181 states and 14688 transitions. [2021-06-05 15:13:17,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 15:13:17,073 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:17,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:17,079 INFO L225 Difference]: With dead ends: 4181 [2021-06-05 15:13:17,080 INFO L226 Difference]: Without dead ends: 4131 [2021-06-05 15:13:17,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2712 ImplicationChecksByTransitivity, 3413.9ms TimeCoverageRelationStatistics Valid=1278, Invalid=6378, Unknown=0, NotChecked=0, Total=7656 [2021-06-05 15:13:17,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2021-06-05 15:13:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 2834. [2021-06-05 15:13:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2834 states, 2833 states have (on average 3.7871514295799504) internal successors, (10729), 2833 states have internal predecessors, (10729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 10729 transitions. [2021-06-05 15:13:17,122 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 10729 transitions. Word has length 24 [2021-06-05 15:13:17,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:17,122 INFO L482 AbstractCegarLoop]: Abstraction has 2834 states and 10729 transitions. [2021-06-05 15:13:17,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:17,122 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 10729 transitions. [2021-06-05 15:13:17,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:17,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:17,126 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:17,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,305 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:17,326 INFO L430 AbstractCegarLoop]: === Iteration 317 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:17,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:17,326 INFO L82 PathProgramCache]: Analyzing trace with hash 98485646, now seen corresponding path program 100 times [2021-06-05 15:13:17,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:17,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417814277] [2021-06-05 15:13:17,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:17,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:17,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417814277] [2021-06-05 15:13:17,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417814277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:17,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111739658] [2021-06-05 15:13:17,499 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 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:17,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:13:17,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:17,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:17,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:17,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:17,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:17,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:17,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:17,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:13:17,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:17,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111739658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:17,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:17,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:13:17,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353751299] [2021-06-05 15:13:17,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:17,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:17,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:17,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:17,693 INFO L87 Difference]: Start difference. First operand 2834 states and 10729 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:20,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:20,260 INFO L93 Difference]: Finished difference Result 3970 states and 14222 transitions. [2021-06-05 15:13:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 15:13:20,260 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:20,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:20,267 INFO L225 Difference]: With dead ends: 3970 [2021-06-05 15:13:20,267 INFO L226 Difference]: Without dead ends: 3948 [2021-06-05 15:13:20,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1996 ImplicationChecksByTransitivity, 2189.9ms TimeCoverageRelationStatistics Valid=1020, Invalid=4832, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 15:13:20,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-06-05 15:13:20,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 2862. [2021-06-05 15:13:20,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2862 states, 2861 states have (on average 3.788885005242922) internal successors, (10840), 2861 states have internal predecessors, (10840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:20,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2862 states to 2862 states and 10840 transitions. [2021-06-05 15:13:20,311 INFO L78 Accepts]: Start accepts. Automaton has 2862 states and 10840 transitions. Word has length 24 [2021-06-05 15:13:20,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:20,311 INFO L482 AbstractCegarLoop]: Abstraction has 2862 states and 10840 transitions. [2021-06-05 15:13:20,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:20,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2862 states and 10840 transitions. [2021-06-05 15:13:20,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:20,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:20,315 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:20,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:20,515 INFO L430 AbstractCegarLoop]: === Iteration 318 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:20,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:20,516 INFO L82 PathProgramCache]: Analyzing trace with hash -168148038, now seen corresponding path program 183 times [2021-06-05 15:13:20,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:20,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355816324] [2021-06-05 15:13:20,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:20,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:20,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:20,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355816324] [2021-06-05 15:13:20,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355816324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:20,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397031071] [2021-06-05 15:13:20,684 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 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:20,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:13:20,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:20,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:13:20,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:20,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:13:20,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:20,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 57 [2021-06-05 15:13:20,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:20,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:20,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:20,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:54 [2021-06-05 15:13:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:21,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397031071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:21,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:21,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:13:21,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221507523] [2021-06-05 15:13:21,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:13:21,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:21,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:13:21,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:13:21,099 INFO L87 Difference]: Start difference. First operand 2862 states and 10840 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:21,650 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40 [2021-06-05 15:13:23,239 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2021-06-05 15:13:23,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:23,882 INFO L93 Difference]: Finished difference Result 3928 states and 14042 transitions. [2021-06-05 15:13:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-05 15:13:23,883 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:23,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:23,889 INFO L225 Difference]: With dead ends: 3928 [2021-06-05 15:13:23,889 INFO L226 Difference]: Without dead ends: 3896 [2021-06-05 15:13:23,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 2450.7ms TimeCoverageRelationStatistics Valid=723, Invalid=4247, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 15:13:23,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3896 states. [2021-06-05 15:13:23,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3896 to 2879. [2021-06-05 15:13:23,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2879 states, 2878 states have (on average 3.791174426685198) internal successors, (10911), 2878 states have internal predecessors, (10911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:23,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2879 states to 2879 states and 10911 transitions. [2021-06-05 15:13:23,929 INFO L78 Accepts]: Start accepts. Automaton has 2879 states and 10911 transitions. Word has length 24 [2021-06-05 15:13:23,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:23,929 INFO L482 AbstractCegarLoop]: Abstraction has 2879 states and 10911 transitions. [2021-06-05 15:13:23,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:23,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2879 states and 10911 transitions. [2021-06-05 15:13:23,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:23,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:23,933 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:24,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-06-05 15:13:24,134 INFO L430 AbstractCegarLoop]: === Iteration 319 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:24,134 INFO L82 PathProgramCache]: Analyzing trace with hash 155438140, now seen corresponding path program 184 times [2021-06-05 15:13:24,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:24,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200897316] [2021-06-05 15:13:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:24,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:24,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200897316] [2021-06-05 15:13:24,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200897316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:24,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931965757] [2021-06-05 15:13:24,294 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 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:24,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:13:24,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:24,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:24,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:24,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:24,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:24,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:24,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:24,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:13:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:24,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931965757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:24,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:24,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:13:24,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084905409] [2021-06-05 15:13:24,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:24,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:24,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:24,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:24,486 INFO L87 Difference]: Start difference. First operand 2879 states and 10911 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:27,203 INFO L93 Difference]: Finished difference Result 3884 states and 13980 transitions. [2021-06-05 15:13:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:13:27,204 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:27,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:27,210 INFO L225 Difference]: With dead ends: 3884 [2021-06-05 15:13:27,210 INFO L226 Difference]: Without dead ends: 3862 [2021-06-05 15:13:27,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 2305.1ms TimeCoverageRelationStatistics Valid=973, Invalid=5189, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:13:27,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-06-05 15:13:27,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 2881. [2021-06-05 15:13:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2881 states, 2880 states have (on average 3.790277777777778) internal successors, (10916), 2880 states have internal predecessors, (10916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2881 states to 2881 states and 10916 transitions. [2021-06-05 15:13:27,254 INFO L78 Accepts]: Start accepts. Automaton has 2881 states and 10916 transitions. Word has length 24 [2021-06-05 15:13:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:27,254 INFO L482 AbstractCegarLoop]: Abstraction has 2881 states and 10916 transitions. [2021-06-05 15:13:27,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2881 states and 10916 transitions. [2021-06-05 15:13:27,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:27,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:27,258 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:27,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-06-05 15:13:27,459 INFO L430 AbstractCegarLoop]: === Iteration 320 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:27,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:27,459 INFO L82 PathProgramCache]: Analyzing trace with hash 692360808, now seen corresponding path program 101 times [2021-06-05 15:13:27,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:27,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260594126] [2021-06-05 15:13:27,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:27,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:27,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260594126] [2021-06-05 15:13:27,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260594126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:27,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362994466] [2021-06-05 15:13:27,625 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:27,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:13:27,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:27,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:27,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:27,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:13:27,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:27,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:27,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:27,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:13:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:27,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362994466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:27,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:27,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:13:27,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102176551] [2021-06-05 15:13:27,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:27,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:27,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:27,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:27,834 INFO L87 Difference]: Start difference. First operand 2881 states and 10916 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:30,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:30,286 INFO L93 Difference]: Finished difference Result 4390 states and 15566 transitions. [2021-06-05 15:13:30,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-05 15:13:30,286 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:30,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:30,293 INFO L225 Difference]: With dead ends: 4390 [2021-06-05 15:13:30,293 INFO L226 Difference]: Without dead ends: 4345 [2021-06-05 15:13:30,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1815 ImplicationChecksByTransitivity, 2071.3ms TimeCoverageRelationStatistics Valid=1003, Invalid=4399, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 15:13:30,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4345 states. [2021-06-05 15:13:30,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4345 to 3010. [2021-06-05 15:13:30,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 3.8062479228979726) internal successors, (11453), 3009 states have internal predecessors, (11453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:30,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 11453 transitions. [2021-06-05 15:13:30,342 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 11453 transitions. Word has length 24 [2021-06-05 15:13:30,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:30,342 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 11453 transitions. [2021-06-05 15:13:30,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:30,342 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 11453 transitions. [2021-06-05 15:13:30,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:30,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:30,346 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:30,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-06-05 15:13:30,547 INFO L430 AbstractCegarLoop]: === Iteration 321 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:30,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:30,547 INFO L82 PathProgramCache]: Analyzing trace with hash 487442674, now seen corresponding path program 185 times [2021-06-05 15:13:30,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:30,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856576777] [2021-06-05 15:13:30,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:30,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:30,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856576777] [2021-06-05 15:13:30,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856576777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:30,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539452976] [2021-06-05 15:13:30,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:30,749 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:13:30,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:30,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:30,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:30,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:13:30,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:30,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:30,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:30,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:13:30,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:30,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539452976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:30,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:30,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:13:30,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841439432] [2021-06-05 15:13:30,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:30,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:30,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:30,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:30,912 INFO L87 Difference]: Start difference. First operand 3010 states and 11453 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:33,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:33,642 INFO L93 Difference]: Finished difference Result 4523 states and 16142 transitions. [2021-06-05 15:13:33,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 15:13:33,642 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:33,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:33,650 INFO L225 Difference]: With dead ends: 4523 [2021-06-05 15:13:33,650 INFO L226 Difference]: Without dead ends: 4469 [2021-06-05 15:13:33,651 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 2282.0ms TimeCoverageRelationStatistics Valid=1011, Invalid=4539, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 15:13:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2021-06-05 15:13:33,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 3113. [2021-06-05 15:13:33,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3113 states, 3112 states have (on average 3.8251928020565553) internal successors, (11904), 3112 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:33,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3113 states to 3113 states and 11904 transitions. [2021-06-05 15:13:33,701 INFO L78 Accepts]: Start accepts. Automaton has 3113 states and 11904 transitions. Word has length 24 [2021-06-05 15:13:33,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:33,701 INFO L482 AbstractCegarLoop]: Abstraction has 3113 states and 11904 transitions. [2021-06-05 15:13:33,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:33,701 INFO L276 IsEmpty]: Start isEmpty. Operand 3113 states and 11904 transitions. [2021-06-05 15:13:33,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:33,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:33,705 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:33,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 15:13:33,906 INFO L430 AbstractCegarLoop]: === Iteration 322 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:33,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:33,906 INFO L82 PathProgramCache]: Analyzing trace with hash -380303656, now seen corresponding path program 186 times [2021-06-05 15:13:33,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:33,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402482975] [2021-06-05 15:13:33,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:34,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:34,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:34,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402482975] [2021-06-05 15:13:34,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402482975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:34,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704519791] [2021-06-05 15:13:34,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:34,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:13:34,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:34,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:13:34,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:34,211 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:34,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:13:34,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:34,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:34,226 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:34,226 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:13:34,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:34,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704519791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:34,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:34,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:13:34,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920317564] [2021-06-05 15:13:34,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:13:34,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:34,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:13:34,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:13:34,355 INFO L87 Difference]: Start difference. First operand 3113 states and 11904 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:34,749 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-06-05 15:13:36,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:36,615 INFO L93 Difference]: Finished difference Result 4045 states and 14733 transitions. [2021-06-05 15:13:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 15:13:36,615 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:36,621 INFO L225 Difference]: With dead ends: 4045 [2021-06-05 15:13:36,621 INFO L226 Difference]: Without dead ends: 4036 [2021-06-05 15:13:36,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1307 ImplicationChecksByTransitivity, 1885.4ms TimeCoverageRelationStatistics Valid=622, Invalid=3538, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:13:36,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4036 states. [2021-06-05 15:13:36,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4036 to 3118. [2021-06-05 15:13:36,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3118 states, 3117 states have (on average 3.8248315688161694) internal successors, (11922), 3117 states have internal predecessors, (11922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:36,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3118 states to 3118 states and 11922 transitions. [2021-06-05 15:13:36,667 INFO L78 Accepts]: Start accepts. Automaton has 3118 states and 11922 transitions. Word has length 24 [2021-06-05 15:13:36,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:36,667 INFO L482 AbstractCegarLoop]: Abstraction has 3118 states and 11922 transitions. [2021-06-05 15:13:36,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:36,667 INFO L276 IsEmpty]: Start isEmpty. Operand 3118 states and 11922 transitions. [2021-06-05 15:13:36,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:36,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:36,672 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:36,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable599,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:36,872 INFO L430 AbstractCegarLoop]: === Iteration 323 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:36,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:36,873 INFO L82 PathProgramCache]: Analyzing trace with hash -56717478, now seen corresponding path program 187 times [2021-06-05 15:13:36,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:36,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258920666] [2021-06-05 15:13:36,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:36,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:37,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:37,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258920666] [2021-06-05 15:13:37,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258920666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:37,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899564294] [2021-06-05 15:13:37,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:37,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:37,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:37,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:37,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:37,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:37,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:37,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:13:37,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:37,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899564294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:37,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:37,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:13:37,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268258810] [2021-06-05 15:13:37,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:37,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:37,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:37,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:37,233 INFO L87 Difference]: Start difference. First operand 3118 states and 11922 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:37,615 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-06-05 15:13:39,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:39,398 INFO L93 Difference]: Finished difference Result 4078 states and 14822 transitions. [2021-06-05 15:13:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 15:13:39,399 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:39,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:39,406 INFO L225 Difference]: With dead ends: 4078 [2021-06-05 15:13:39,406 INFO L226 Difference]: Without dead ends: 4045 [2021-06-05 15:13:39,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1789.1ms TimeCoverageRelationStatistics Valid=633, Invalid=3273, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:13:39,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4045 states. [2021-06-05 15:13:39,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4045 to 3135. [2021-06-05 15:13:39,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3135 states, 3134 states have (on average 3.829929802169751) internal successors, (12003), 3134 states have internal predecessors, (12003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:39,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3135 states to 3135 states and 12003 transitions. [2021-06-05 15:13:39,457 INFO L78 Accepts]: Start accepts. Automaton has 3135 states and 12003 transitions. Word has length 24 [2021-06-05 15:13:39,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:39,457 INFO L482 AbstractCegarLoop]: Abstraction has 3135 states and 12003 transitions. [2021-06-05 15:13:39,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:39,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3135 states and 12003 transitions. [2021-06-05 15:13:39,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:39,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:39,462 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:39,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-06-05 15:13:39,663 INFO L430 AbstractCegarLoop]: === Iteration 324 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:39,663 INFO L82 PathProgramCache]: Analyzing trace with hash -83226840, now seen corresponding path program 188 times [2021-06-05 15:13:39,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:39,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130529840] [2021-06-05 15:13:39,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:39,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:39,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130529840] [2021-06-05 15:13:39,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130529840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:39,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881953312] [2021-06-05 15:13:39,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:39,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:39,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:39,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:13:39,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:39,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:39,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:13:39,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:39,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:39,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:39,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:13:40,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:40,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881953312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:40,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:40,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:13:40,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828500795] [2021-06-05 15:13:40,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:13:40,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:40,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:13:40,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:13:40,083 INFO L87 Difference]: Start difference. First operand 3135 states and 12003 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:40,515 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-06-05 15:13:43,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:43,111 INFO L93 Difference]: Finished difference Result 4435 states and 15824 transitions. [2021-06-05 15:13:43,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:13:43,112 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:43,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:43,119 INFO L225 Difference]: With dead ends: 4435 [2021-06-05 15:13:43,119 INFO L226 Difference]: Without dead ends: 4417 [2021-06-05 15:13:43,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 2356.2ms TimeCoverageRelationStatistics Valid=869, Invalid=5451, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 15:13:43,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4417 states. [2021-06-05 15:13:43,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4417 to 3143. [2021-06-05 15:13:43,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3143 states, 3142 states have (on average 3.8309993634627624) internal successors, (12037), 3142 states have internal predecessors, (12037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:43,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3143 states to 3143 states and 12037 transitions. [2021-06-05 15:13:43,185 INFO L78 Accepts]: Start accepts. Automaton has 3143 states and 12037 transitions. Word has length 24 [2021-06-05 15:13:43,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:43,185 INFO L482 AbstractCegarLoop]: Abstraction has 3143 states and 12037 transitions. [2021-06-05 15:13:43,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:43,185 INFO L276 IsEmpty]: Start isEmpty. Operand 3143 states and 12037 transitions. [2021-06-05 15:13:43,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:43,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:43,189 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:43,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable602 [2021-06-05 15:13:43,390 INFO L430 AbstractCegarLoop]: === Iteration 325 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:43,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:43,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1874088014, now seen corresponding path program 189 times [2021-06-05 15:13:43,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:43,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807538005] [2021-06-05 15:13:43,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:43,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:43,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:43,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807538005] [2021-06-05 15:13:43,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807538005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:43,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314544366] [2021-06-05 15:13:43,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:43,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:13:43,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:43,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:13:43,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:43,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:43,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:13:43,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:43,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:43,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:43,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:13:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:43,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314544366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:43,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:43,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:13:43,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410780350] [2021-06-05 15:13:43,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:13:43,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:43,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:13:43,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:13:43,824 INFO L87 Difference]: Start difference. First operand 3143 states and 12037 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:44,222 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2021-06-05 15:13:44,515 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-05 15:13:46,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:46,528 INFO L93 Difference]: Finished difference Result 4105 states and 14910 transitions. [2021-06-05 15:13:46,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 15:13:46,529 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:46,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:46,536 INFO L225 Difference]: With dead ends: 4105 [2021-06-05 15:13:46,536 INFO L226 Difference]: Without dead ends: 4086 [2021-06-05 15:13:46,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 2325.2ms TimeCoverageRelationStatistics Valid=889, Invalid=4963, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 15:13:46,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-06-05 15:13:46,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 3144. [2021-06-05 15:13:46,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3144 states, 3143 states have (on average 3.8307349665924275) internal successors, (12040), 3143 states have internal predecessors, (12040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:46,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3144 states to 3144 states and 12040 transitions. [2021-06-05 15:13:46,582 INFO L78 Accepts]: Start accepts. Automaton has 3144 states and 12040 transitions. Word has length 24 [2021-06-05 15:13:46,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:46,582 INFO L482 AbstractCegarLoop]: Abstraction has 3144 states and 12040 transitions. [2021-06-05 15:13:46,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:46,582 INFO L276 IsEmpty]: Start isEmpty. Operand 3144 states and 12040 transitions. [2021-06-05 15:13:46,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:46,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:46,586 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:46,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-06-05 15:13:46,787 INFO L430 AbstractCegarLoop]: === Iteration 326 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:46,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:46,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1092254214, now seen corresponding path program 190 times [2021-06-05 15:13:46,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:46,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768258275] [2021-06-05 15:13:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:46,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:46,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768258275] [2021-06-05 15:13:46,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768258275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:46,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354169270] [2021-06-05 15:13:46,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:47,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:13:47,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:47,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:47,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:47,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:47,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:47,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:47,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:47,151 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:13:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:47,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354169270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:47,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:47,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:13:47,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147663776] [2021-06-05 15:13:47,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:13:47,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:47,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:13:47,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:13:47,222 INFO L87 Difference]: Start difference. First operand 3144 states and 12040 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:47,594 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 15:13:49,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:49,168 INFO L93 Difference]: Finished difference Result 3824 states and 14104 transitions. [2021-06-05 15:13:49,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:13:49,169 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:49,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:49,175 INFO L225 Difference]: With dead ends: 3824 [2021-06-05 15:13:49,175 INFO L226 Difference]: Without dead ends: 3811 [2021-06-05 15:13:49,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1696.5ms TimeCoverageRelationStatistics Valid=633, Invalid=3527, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 15:13:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3811 states. [2021-06-05 15:13:49,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3811 to 3155. [2021-06-05 15:13:49,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 3154 states have (on average 3.8332276474318325) internal successors, (12090), 3154 states have internal predecessors, (12090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 12090 transitions. [2021-06-05 15:13:49,218 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 12090 transitions. Word has length 24 [2021-06-05 15:13:49,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:49,218 INFO L482 AbstractCegarLoop]: Abstraction has 3155 states and 12090 transitions. [2021-06-05 15:13:49,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 12090 transitions. [2021-06-05 15:13:49,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:49,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:49,223 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:49,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:49,423 INFO L430 AbstractCegarLoop]: === Iteration 327 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:49,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:49,423 INFO L82 PathProgramCache]: Analyzing trace with hash -147198670, now seen corresponding path program 191 times [2021-06-05 15:13:49,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:49,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890559553] [2021-06-05 15:13:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:49,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:49,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890559553] [2021-06-05 15:13:49,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890559553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:49,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399237556] [2021-06-05 15:13:49,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:49,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:13:49,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:49,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:49,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:49,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:49,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:49,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:49,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:49,713 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:13:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:49,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399237556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:49,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:49,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:13:49,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878152422] [2021-06-05 15:13:49,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:13:49,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:49,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:13:49,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:13:49,778 INFO L87 Difference]: Start difference. First operand 3155 states and 12090 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:50,122 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2021-06-05 15:13:51,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:51,355 INFO L93 Difference]: Finished difference Result 3946 states and 14542 transitions. [2021-06-05 15:13:51,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:13:51,356 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:51,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:51,362 INFO L225 Difference]: With dead ends: 3946 [2021-06-05 15:13:51,362 INFO L226 Difference]: Without dead ends: 3935 [2021-06-05 15:13:51,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1344.0ms TimeCoverageRelationStatistics Valid=476, Invalid=2386, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:13:51,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2021-06-05 15:13:51,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 3159. [2021-06-05 15:13:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3159 states, 3158 states have (on average 3.8331222292590246) internal successors, (12105), 3158 states have internal predecessors, (12105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:51,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3159 states to 3159 states and 12105 transitions. [2021-06-05 15:13:51,405 INFO L78 Accepts]: Start accepts. Automaton has 3159 states and 12105 transitions. Word has length 24 [2021-06-05 15:13:51,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:51,406 INFO L482 AbstractCegarLoop]: Abstraction has 3159 states and 12105 transitions. [2021-06-05 15:13:51,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:51,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3159 states and 12105 transitions. [2021-06-05 15:13:51,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:51,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:51,410 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:51,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:51,610 INFO L430 AbstractCegarLoop]: === Iteration 328 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:51,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:51,611 INFO L82 PathProgramCache]: Analyzing trace with hash 832215778, now seen corresponding path program 192 times [2021-06-05 15:13:51,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:51,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951882065] [2021-06-05 15:13:51,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:51,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:51,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:51,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951882065] [2021-06-05 15:13:51,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951882065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:51,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897893406] [2021-06-05 15:13:51,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:51,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:13:51,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:51,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:13:51,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:51,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:51,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:13:51,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:51,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:51,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:51,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:13:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:52,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897893406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:52,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:52,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:13:52,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529175078] [2021-06-05 15:13:52,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:13:52,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:52,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:13:52,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:13:52,080 INFO L87 Difference]: Start difference. First operand 3159 states and 12105 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:52,477 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-05 15:13:52,747 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2021-06-05 15:13:54,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:54,577 INFO L93 Difference]: Finished difference Result 3997 states and 14609 transitions. [2021-06-05 15:13:54,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 15:13:54,577 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:54,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:54,584 INFO L225 Difference]: With dead ends: 3997 [2021-06-05 15:13:54,584 INFO L226 Difference]: Without dead ends: 3979 [2021-06-05 15:13:54,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 2111.5ms TimeCoverageRelationStatistics Valid=726, Invalid=3966, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:13:54,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2021-06-05 15:13:54,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 3159. [2021-06-05 15:13:54,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3159 states, 3158 states have (on average 3.8331222292590246) internal successors, (12105), 3158 states have internal predecessors, (12105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:54,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3159 states to 3159 states and 12105 transitions. [2021-06-05 15:13:54,627 INFO L78 Accepts]: Start accepts. Automaton has 3159 states and 12105 transitions. Word has length 24 [2021-06-05 15:13:54,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:54,628 INFO L482 AbstractCegarLoop]: Abstraction has 3159 states and 12105 transitions. [2021-06-05 15:13:54,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3159 states and 12105 transitions. [2021-06-05 15:13:54,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:54,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:54,632 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:54,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:54,833 INFO L430 AbstractCegarLoop]: === Iteration 329 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:54,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:54,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1741961320, now seen corresponding path program 193 times [2021-06-05 15:13:54,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:54,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022536981] [2021-06-05 15:13:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:54,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:54,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022536981] [2021-06-05 15:13:54,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022536981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:54,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913545474] [2021-06-05 15:13:54,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:55,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:55,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:55,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:13:55,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:55,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:55,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:55,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:13:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:55,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913545474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:55,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:55,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:13:55,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379495348] [2021-06-05 15:13:55,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:13:55,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:55,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:13:55,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:13:55,173 INFO L87 Difference]: Start difference. First operand 3159 states and 12105 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:55,508 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2021-06-05 15:13:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:56,647 INFO L93 Difference]: Finished difference Result 3790 states and 14033 transitions. [2021-06-05 15:13:56,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:13:56,647 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:13:56,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:56,653 INFO L225 Difference]: With dead ends: 3790 [2021-06-05 15:13:56,653 INFO L226 Difference]: Without dead ends: 3779 [2021-06-05 15:13:56,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1242.2ms TimeCoverageRelationStatistics Valid=476, Invalid=2494, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 15:13:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2021-06-05 15:13:56,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 3156. [2021-06-05 15:13:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 3155 states have (on average 3.8339144215530903) internal successors, (12096), 3155 states have internal predecessors, (12096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:56,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 12096 transitions. [2021-06-05 15:13:56,714 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 12096 transitions. Word has length 24 [2021-06-05 15:13:56,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:56,714 INFO L482 AbstractCegarLoop]: Abstraction has 3156 states and 12096 transitions. [2021-06-05 15:13:56,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 12096 transitions. [2021-06-05 15:13:56,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:13:56,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:56,718 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:56,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-06-05 15:13:56,919 INFO L430 AbstractCegarLoop]: === Iteration 330 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:13:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:56,919 INFO L82 PathProgramCache]: Analyzing trace with hash -792728518, now seen corresponding path program 102 times [2021-06-05 15:13:56,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:56,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682554156] [2021-06-05 15:13:56,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:57,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:57,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682554156] [2021-06-05 15:13:57,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682554156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:57,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518271657] [2021-06-05 15:13:57,087 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 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:57,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:13:57,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:57,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:13:57,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:57,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:57,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:13:57,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:57,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:57,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:57,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:13:57,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:57,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518271657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:57,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:57,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:13:57,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006084527] [2021-06-05 15:13:57,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:13:57,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:57,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:13:57,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:13:57,330 INFO L87 Difference]: Start difference. First operand 3156 states and 12096 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:00,579 INFO L93 Difference]: Finished difference Result 4497 states and 16284 transitions. [2021-06-05 15:14:00,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 15:14:00,580 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:00,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:00,587 INFO L225 Difference]: With dead ends: 4497 [2021-06-05 15:14:00,588 INFO L226 Difference]: Without dead ends: 4464 [2021-06-05 15:14:00,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2509 ImplicationChecksByTransitivity, 2819.1ms TimeCoverageRelationStatistics Valid=1071, Invalid=6069, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 15:14:00,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4464 states. [2021-06-05 15:14:00,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4464 to 3272. [2021-06-05 15:14:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 3271 states have (on average 3.8514215836135737) internal successors, (12598), 3271 states have internal predecessors, (12598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 12598 transitions. [2021-06-05 15:14:00,642 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 12598 transitions. Word has length 24 [2021-06-05 15:14:00,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:00,642 INFO L482 AbstractCegarLoop]: Abstraction has 3272 states and 12598 transitions. [2021-06-05 15:14:00,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 12598 transitions. [2021-06-05 15:14:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:00,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:00,646 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:00,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-06-05 15:14:00,847 INFO L430 AbstractCegarLoop]: === Iteration 331 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:00,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:00,847 INFO L82 PathProgramCache]: Analyzing trace with hash -997646652, now seen corresponding path program 194 times [2021-06-05 15:14:00,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:00,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410932698] [2021-06-05 15:14:00,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:01,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:01,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:01,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410932698] [2021-06-05 15:14:01,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410932698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:01,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080686885] [2021-06-05 15:14:01,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:01,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:01,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:01,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:14:01,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:01,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:01,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:14:01,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:01,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:01,222 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:01,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:14:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:01,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080686885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:01,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:01,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:14:01,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034308154] [2021-06-05 15:14:01,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:01,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:01,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:01,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:01,281 INFO L87 Difference]: Start difference. First operand 3272 states and 12598 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:04,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:04,026 INFO L93 Difference]: Finished difference Result 4691 states and 16892 transitions. [2021-06-05 15:14:04,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:14:04,026 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:04,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:04,034 INFO L225 Difference]: With dead ends: 4691 [2021-06-05 15:14:04,034 INFO L226 Difference]: Without dead ends: 4635 [2021-06-05 15:14:04,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 2362.3ms TimeCoverageRelationStatistics Valid=1006, Invalid=5000, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 15:14:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4635 states. [2021-06-05 15:14:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4635 to 3315. [2021-06-05 15:14:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 3.859987929993965) internal successors, (12792), 3314 states have internal predecessors, (12792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 12792 transitions. [2021-06-05 15:14:04,088 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 12792 transitions. Word has length 24 [2021-06-05 15:14:04,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:04,088 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 12792 transitions. [2021-06-05 15:14:04,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:04,088 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 12792 transitions. [2021-06-05 15:14:04,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:04,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:04,092 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:04,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable615,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:04,293 INFO L430 AbstractCegarLoop]: === Iteration 332 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:04,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:04,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1420132378, now seen corresponding path program 195 times [2021-06-05 15:14:04,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:04,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662629893] [2021-06-05 15:14:04,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:04,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:04,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662629893] [2021-06-05 15:14:04,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662629893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:04,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871187406] [2021-06-05 15:14:04,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:04,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:14:04,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:04,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:14:04,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:04,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:04,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:04,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 56 [2021-06-05 15:14:04,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:04,713 INFO L628 ElimStorePlain]: treesize reduction 43, result has 56.6 percent of original size [2021-06-05 15:14:04,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:04,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:56 [2021-06-05 15:14:04,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:04,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871187406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:04,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:04,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:14:04,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085170828] [2021-06-05 15:14:04,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:14:04,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:04,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:14:04,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:14:04,891 INFO L87 Difference]: Start difference. First operand 3315 states and 12792 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:05,498 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2021-06-05 15:14:06,995 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 15:14:08,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:08,277 INFO L93 Difference]: Finished difference Result 4283 states and 15736 transitions. [2021-06-05 15:14:08,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:14:08,277 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:08,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:08,284 INFO L225 Difference]: With dead ends: 4283 [2021-06-05 15:14:08,284 INFO L226 Difference]: Without dead ends: 4266 [2021-06-05 15:14:08,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2141 ImplicationChecksByTransitivity, 3081.8ms TimeCoverageRelationStatistics Valid=891, Invalid=5429, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 15:14:08,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2021-06-05 15:14:08,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 3331. [2021-06-05 15:14:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3331 states, 3330 states have (on average 3.863063063063063) internal successors, (12864), 3330 states have internal predecessors, (12864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:08,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3331 states to 3331 states and 12864 transitions. [2021-06-05 15:14:08,330 INFO L78 Accepts]: Start accepts. Automaton has 3331 states and 12864 transitions. Word has length 24 [2021-06-05 15:14:08,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:08,331 INFO L482 AbstractCegarLoop]: Abstraction has 3331 states and 12864 transitions. [2021-06-05 15:14:08,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:08,331 INFO L276 IsEmpty]: Start isEmpty. Operand 3331 states and 12864 transitions. [2021-06-05 15:14:08,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:08,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:08,335 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:08,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:08,536 INFO L430 AbstractCegarLoop]: === Iteration 333 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:08,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:08,536 INFO L82 PathProgramCache]: Analyzing trace with hash 265611744, now seen corresponding path program 196 times [2021-06-05 15:14:08,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:08,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916398340] [2021-06-05 15:14:08,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:08,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:08,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:08,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916398340] [2021-06-05 15:14:08,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916398340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:08,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308357931] [2021-06-05 15:14:08,695 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 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:08,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:08,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:08,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:08,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:08,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:14:08,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:08,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:08,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:08,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:14:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:08,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308357931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:08,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:08,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:14:08,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602307101] [2021-06-05 15:14:08,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:14:08,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:08,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:14:08,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:14:08,892 INFO L87 Difference]: Start difference. First operand 3331 states and 12864 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:11,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:11,178 INFO L93 Difference]: Finished difference Result 4180 states and 15490 transitions. [2021-06-05 15:14:11,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 15:14:11,178 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:11,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:11,185 INFO L225 Difference]: With dead ends: 4180 [2021-06-05 15:14:11,185 INFO L226 Difference]: Without dead ends: 4165 [2021-06-05 15:14:11,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1633 ImplicationChecksByTransitivity, 1913.6ms TimeCoverageRelationStatistics Valid=759, Invalid=3933, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:14:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-06-05 15:14:11,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 3335. [2021-06-05 15:14:11,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3335 states, 3334 states have (on average 3.8629274145170966) internal successors, (12879), 3334 states have internal predecessors, (12879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:11,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3335 states to 3335 states and 12879 transitions. [2021-06-05 15:14:11,232 INFO L78 Accepts]: Start accepts. Automaton has 3335 states and 12879 transitions. Word has length 24 [2021-06-05 15:14:11,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:11,233 INFO L482 AbstractCegarLoop]: Abstraction has 3335 states and 12879 transitions. [2021-06-05 15:14:11,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:11,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3335 states and 12879 transitions. [2021-06-05 15:14:11,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:11,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:11,237 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:11,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:11,438 INFO L430 AbstractCegarLoop]: === Iteration 334 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:11,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:11,438 INFO L82 PathProgramCache]: Analyzing trace with hash -440717930, now seen corresponding path program 197 times [2021-06-05 15:14:11,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:11,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581739339] [2021-06-05 15:14:11,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:11,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:11,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:11,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581739339] [2021-06-05 15:14:11,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581739339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:11,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500861108] [2021-06-05 15:14:11,602 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 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:11,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:14:11,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:11,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:11,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:11,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:14:11,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:11,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:11,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:11,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:9 [2021-06-05 15:14:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:11,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500861108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:11,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:11,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:14:11,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327276071] [2021-06-05 15:14:11,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:14:11,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:11,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:14:11,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:14:11,796 INFO L87 Difference]: Start difference. First operand 3335 states and 12879 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:14,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:14,924 INFO L93 Difference]: Finished difference Result 4826 states and 17391 transitions. [2021-06-05 15:14:14,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-06-05 15:14:14,925 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:14,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:14,932 INFO L225 Difference]: With dead ends: 4826 [2021-06-05 15:14:14,932 INFO L226 Difference]: Without dead ends: 4795 [2021-06-05 15:14:14,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2712 ImplicationChecksByTransitivity, 2624.8ms TimeCoverageRelationStatistics Valid=1159, Invalid=6323, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 15:14:14,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4795 states. [2021-06-05 15:14:14,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4795 to 3365. [2021-06-05 15:14:14,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3365 states, 3364 states have (on average 3.8689060642092747) internal successors, (13015), 3364 states have internal predecessors, (13015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:14,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 13015 transitions. [2021-06-05 15:14:14,983 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 13015 transitions. Word has length 24 [2021-06-05 15:14:14,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:14,983 INFO L482 AbstractCegarLoop]: Abstraction has 3365 states and 13015 transitions. [2021-06-05 15:14:14,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:14,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 13015 transitions. [2021-06-05 15:14:14,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:14,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:14,988 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:15,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:15,188 INFO L430 AbstractCegarLoop]: === Iteration 335 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:15,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:15,189 INFO L82 PathProgramCache]: Analyzing trace with hash -968550830, now seen corresponding path program 198 times [2021-06-05 15:14:15,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:15,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77728489] [2021-06-05 15:14:15,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:15,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:15,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77728489] [2021-06-05 15:14:15,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77728489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:15,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834141714] [2021-06-05 15:14:15,380 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 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:15,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:14:15,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:15,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:14:15,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:15,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:15,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:15,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:15,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 53 [2021-06-05 15:14:15,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:15,663 INFO L628 ElimStorePlain]: treesize reduction 16, result has 69.2 percent of original size [2021-06-05 15:14:15,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:15,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-06-05 15:14:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:15,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834141714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:15,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:15,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 15:14:15,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692329088] [2021-06-05 15:14:15,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:15,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:15,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:15,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:15,746 INFO L87 Difference]: Start difference. First operand 3365 states and 13015 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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 15:14:18,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:18,879 INFO L93 Difference]: Finished difference Result 4795 states and 17888 transitions. [2021-06-05 15:14:18,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 15:14:18,880 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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 24 [2021-06-05 15:14:18,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:18,888 INFO L225 Difference]: With dead ends: 4795 [2021-06-05 15:14:18,888 INFO L226 Difference]: Without dead ends: 4786 [2021-06-05 15:14:18,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 2533.9ms TimeCoverageRelationStatistics Valid=651, Invalid=3771, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 15:14:18,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-06-05 15:14:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 3369. [2021-06-05 15:14:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3368 states have (on average 3.8696555819477436) internal successors, (13033), 3368 states have internal predecessors, (13033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:18,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 13033 transitions. [2021-06-05 15:14:18,939 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 13033 transitions. Word has length 24 [2021-06-05 15:14:18,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:18,939 INFO L482 AbstractCegarLoop]: Abstraction has 3369 states and 13033 transitions. [2021-06-05 15:14:18,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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 15:14:18,940 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 13033 transitions. [2021-06-05 15:14:18,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:18,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:18,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:19,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable627 [2021-06-05 15:14:19,145 INFO L430 AbstractCegarLoop]: === Iteration 336 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:19,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:19,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1478066694, now seen corresponding path program 199 times [2021-06-05 15:14:19,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:19,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189696665] [2021-06-05 15:14:19,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:19,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:19,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:19,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189696665] [2021-06-05 15:14:19,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189696665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:19,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906280044] [2021-06-05 15:14:19,353 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 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:19,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:19,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:19,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:14:19,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:19,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:19,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:19,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:14:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:19,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906280044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:19,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:19,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:14:19,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495736763] [2021-06-05 15:14:19,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:19,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:19,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:19,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:19,580 INFO L87 Difference]: Start difference. First operand 3369 states and 13033 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:20,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:20,913 INFO L93 Difference]: Finished difference Result 4091 states and 15410 transitions. [2021-06-05 15:14:20,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:14:20,913 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:20,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:20,920 INFO L225 Difference]: With dead ends: 4091 [2021-06-05 15:14:20,920 INFO L226 Difference]: Without dead ends: 4082 [2021-06-05 15:14:20,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1036.6ms TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:14:20,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-06-05 15:14:20,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3374. [2021-06-05 15:14:20,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3374 states, 3373 states have (on average 3.868662911354877) internal successors, (13049), 3373 states have internal predecessors, (13049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:20,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3374 states to 3374 states and 13049 transitions. [2021-06-05 15:14:20,965 INFO L78 Accepts]: Start accepts. Automaton has 3374 states and 13049 transitions. Word has length 24 [2021-06-05 15:14:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:20,965 INFO L482 AbstractCegarLoop]: Abstraction has 3374 states and 13049 transitions. [2021-06-05 15:14:20,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 3374 states and 13049 transitions. [2021-06-05 15:14:20,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:20,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:20,970 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:21,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:21,171 INFO L430 AbstractCegarLoop]: === Iteration 337 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:21,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:21,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1687604074, now seen corresponding path program 200 times [2021-06-05 15:14:21,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:21,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750464740] [2021-06-05 15:14:21,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:21,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:21,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750464740] [2021-06-05 15:14:21,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750464740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:21,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544177862] [2021-06-05 15:14:21,379 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 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:21,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:21,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:21,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:21,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:21,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:21,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:21,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:21,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 38 [2021-06-05 15:14:21,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:14:21,638 INFO L628 ElimStorePlain]: treesize reduction 25, result has 46.8 percent of original size [2021-06-05 15:14:21,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:21,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 15:14:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:21,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544177862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:21,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:21,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:14:21,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722466305] [2021-06-05 15:14:21,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:14:21,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:21,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:14:21,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:14:21,700 INFO L87 Difference]: Start difference. First operand 3374 states and 13049 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:23,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:23,126 INFO L93 Difference]: Finished difference Result 3999 states and 15033 transitions. [2021-06-05 15:14:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 15:14:23,126 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:23,133 INFO L225 Difference]: With dead ends: 3999 [2021-06-05 15:14:23,133 INFO L226 Difference]: Without dead ends: 3981 [2021-06-05 15:14:23,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1213.3ms TimeCoverageRelationStatistics Valid=400, Invalid=2462, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:14:23,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3981 states. [2021-06-05 15:14:23,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3981 to 3388. [2021-06-05 15:14:23,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 3.8665485680543252) internal successors, (13096), 3387 states have internal predecessors, (13096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 13096 transitions. [2021-06-05 15:14:23,181 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 13096 transitions. Word has length 24 [2021-06-05 15:14:23,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:23,181 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 13096 transitions. [2021-06-05 15:14:23,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 13096 transitions. [2021-06-05 15:14:23,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:23,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:23,185 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:23,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-05 15:14:23,386 INFO L430 AbstractCegarLoop]: === Iteration 338 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:23,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:23,386 INFO L82 PathProgramCache]: Analyzing trace with hash 41067672, now seen corresponding path program 201 times [2021-06-05 15:14:23,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:23,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277921120] [2021-06-05 15:14:23,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:23,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:23,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277921120] [2021-06-05 15:14:23,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277921120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:23,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675130817] [2021-06-05 15:14:23,597 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 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:23,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:14:23,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:23,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:14:23,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:23,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:23,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:14:23,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:23,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:23,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:23,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:14:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:23,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675130817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:23,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:23,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:14:23,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657615716] [2021-06-05 15:14:23,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:14:23,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:23,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:14:23,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:14:23,873 INFO L87 Difference]: Start difference. First operand 3388 states and 13096 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:26,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:26,089 INFO L93 Difference]: Finished difference Result 4200 states and 15720 transitions. [2021-06-05 15:14:26,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 15:14:26,089 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:26,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:26,096 INFO L225 Difference]: With dead ends: 4200 [2021-06-05 15:14:26,096 INFO L226 Difference]: Without dead ends: 4181 [2021-06-05 15:14:26,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1732.1ms TimeCoverageRelationStatistics Valid=485, Invalid=3055, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:14:26,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-06-05 15:14:26,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3383. [2021-06-05 15:14:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3383 states, 3382 states have (on average 3.868125369603785) internal successors, (13082), 3382 states have internal predecessors, (13082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:26,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 13082 transitions. [2021-06-05 15:14:26,143 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 13082 transitions. Word has length 24 [2021-06-05 15:14:26,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:26,143 INFO L482 AbstractCegarLoop]: Abstraction has 3383 states and 13082 transitions. [2021-06-05 15:14:26,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:26,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 13082 transitions. [2021-06-05 15:14:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:26,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:26,148 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:26,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:26,348 INFO L430 AbstractCegarLoop]: === Iteration 339 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:26,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:26,349 INFO L82 PathProgramCache]: Analyzing trace with hash -987082188, now seen corresponding path program 202 times [2021-06-05 15:14:26,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:26,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3358297] [2021-06-05 15:14:26,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:26,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:26,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:26,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:26,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3358297] [2021-06-05 15:14:26,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3358297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:26,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684245532] [2021-06-05 15:14:26,529 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 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:26,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:26,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:26,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:26,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:26,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:14:26,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:26,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:26,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:26,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:14:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:26,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684245532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:26,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:26,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:14:26,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266101668] [2021-06-05 15:14:26,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:14:26,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:26,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:14:26,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:14:26,718 INFO L87 Difference]: Start difference. First operand 3383 states and 13082 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:27,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:27,758 INFO L93 Difference]: Finished difference Result 4061 states and 15309 transitions. [2021-06-05 15:14:27,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:14:27,758 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:27,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:27,764 INFO L225 Difference]: With dead ends: 4061 [2021-06-05 15:14:27,764 INFO L226 Difference]: Without dead ends: 4052 [2021-06-05 15:14:27,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 889.5ms TimeCoverageRelationStatistics Valid=279, Invalid=1613, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:14:27,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4052 states. [2021-06-05 15:14:27,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4052 to 3392. [2021-06-05 15:14:27,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3392 states, 3391 states have (on average 3.8661161899144796) internal successors, (13110), 3391 states have internal predecessors, (13110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3392 states to 3392 states and 13110 transitions. [2021-06-05 15:14:27,811 INFO L78 Accepts]: Start accepts. Automaton has 3392 states and 13110 transitions. Word has length 24 [2021-06-05 15:14:27,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:27,811 INFO L482 AbstractCegarLoop]: Abstraction has 3392 states and 13110 transitions. [2021-06-05 15:14:27,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 3392 states and 13110 transitions. [2021-06-05 15:14:27,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:27,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:27,816 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:28,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable641,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:28,016 INFO L430 AbstractCegarLoop]: === Iteration 340 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:28,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:28,016 INFO L82 PathProgramCache]: Analyzing trace with hash -663496010, now seen corresponding path program 203 times [2021-06-05 15:14:28,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:28,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181838014] [2021-06-05 15:14:28,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:28,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:28,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:28,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181838014] [2021-06-05 15:14:28,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181838014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:28,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330626201] [2021-06-05 15:14:28,200 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 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:28,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:14:28,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:28,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:28,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:28,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:14:28,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:28,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:28,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:28,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:14:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:28,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330626201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:28,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:28,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:14:28,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439910392] [2021-06-05 15:14:28,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:14:28,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:28,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:14:28,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:14:28,416 INFO L87 Difference]: Start difference. First operand 3392 states and 13110 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:29,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:29,643 INFO L93 Difference]: Finished difference Result 4052 states and 15285 transitions. [2021-06-05 15:14:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:14:29,643 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:29,650 INFO L225 Difference]: With dead ends: 4052 [2021-06-05 15:14:29,650 INFO L226 Difference]: Without dead ends: 4041 [2021-06-05 15:14:29,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 962.9ms TimeCoverageRelationStatistics Valid=282, Invalid=1880, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:14:29,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4041 states. [2021-06-05 15:14:29,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4041 to 3382. [2021-06-05 15:14:29,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3382 states, 3381 states have (on average 3.868086364980775) internal successors, (13078), 3381 states have internal predecessors, (13078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3382 states to 3382 states and 13078 transitions. [2021-06-05 15:14:29,697 INFO L78 Accepts]: Start accepts. Automaton has 3382 states and 13078 transitions. Word has length 24 [2021-06-05 15:14:29,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:29,697 INFO L482 AbstractCegarLoop]: Abstraction has 3382 states and 13078 transitions. [2021-06-05 15:14:29,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:29,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3382 states and 13078 transitions. [2021-06-05 15:14:29,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:29,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:29,702 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:29,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-06-05 15:14:29,903 INFO L430 AbstractCegarLoop]: === Iteration 341 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:29,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:29,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1788704418, now seen corresponding path program 204 times [2021-06-05 15:14:29,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:29,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820687613] [2021-06-05 15:14:29,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:30,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:30,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:30,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820687613] [2021-06-05 15:14:30,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820687613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:30,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074142559] [2021-06-05 15:14:30,100 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 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:30,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:14:30,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:30,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:14:30,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:30,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:30,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:30,363 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:30,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 53 [2021-06-05 15:14:30,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:30,398 INFO L628 ElimStorePlain]: treesize reduction 16, result has 69.2 percent of original size [2021-06-05 15:14:30,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:30,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-06-05 15:14:30,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:30,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074142559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:30,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:30,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 15:14:30,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841584107] [2021-06-05 15:14:30,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:30,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:30,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:30,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:30,479 INFO L87 Difference]: Start difference. First operand 3382 states and 13078 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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 15:14:32,004 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-06-05 15:14:36,180 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-06-05 15:14:36,538 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2021-06-05 15:14:36,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:36,624 INFO L93 Difference]: Finished difference Result 6012 states and 21882 transitions. [2021-06-05 15:14:36,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-05 15:14:36,624 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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 24 [2021-06-05 15:14:36,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:36,633 INFO L225 Difference]: With dead ends: 6012 [2021-06-05 15:14:36,633 INFO L226 Difference]: Without dead ends: 5983 [2021-06-05 15:14:36,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2708 ImplicationChecksByTransitivity, 4888.0ms TimeCoverageRelationStatistics Valid=1268, Invalid=6742, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 15:14:36,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5983 states. [2021-06-05 15:14:36,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5983 to 3413. [2021-06-05 15:14:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8710433763188745) internal successors, (13208), 3412 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:36,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-05 15:14:36,689 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-05 15:14:36,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:36,689 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-05 15:14:36,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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 15:14:36,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-05 15:14:36,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:36,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:36,694 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:36,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:36,894 INFO L430 AbstractCegarLoop]: === Iteration 342 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:36,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:36,894 INFO L82 PathProgramCache]: Analyzing trace with hash -52244372, now seen corresponding path program 205 times [2021-06-05 15:14:36,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:36,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099763361] [2021-06-05 15:14:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:37,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:37,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099763361] [2021-06-05 15:14:37,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099763361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:37,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176074555] [2021-06-05 15:14:37,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:37,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:37,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:37,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:14:37,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:37,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:37,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:37,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:14:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:37,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176074555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:37,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:37,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:14:37,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82813822] [2021-06-05 15:14:37,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:37,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:37,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:37,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:37,317 INFO L87 Difference]: Start difference. First operand 3413 states and 13208 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:39,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:39,731 INFO L93 Difference]: Finished difference Result 4406 states and 16378 transitions. [2021-06-05 15:14:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:14:39,731 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:39,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:39,739 INFO L225 Difference]: With dead ends: 4406 [2021-06-05 15:14:39,739 INFO L226 Difference]: Without dead ends: 4388 [2021-06-05 15:14:39,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1751.1ms TimeCoverageRelationStatistics Valid=535, Invalid=3371, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:14:39,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4388 states. [2021-06-05 15:14:39,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4388 to 3416. [2021-06-05 15:14:39,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3415 states have (on average 3.8699853587115665) internal successors, (13216), 3415 states have internal predecessors, (13216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 13216 transitions. [2021-06-05 15:14:39,792 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 13216 transitions. Word has length 24 [2021-06-05 15:14:39,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:39,792 INFO L482 AbstractCegarLoop]: Abstraction has 3416 states and 13216 transitions. [2021-06-05 15:14:39,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:39,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 13216 transitions. [2021-06-05 15:14:39,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:39,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:39,798 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:39,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable650 [2021-06-05 15:14:39,998 INFO L430 AbstractCegarLoop]: === Iteration 343 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:39,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2090131316, now seen corresponding path program 206 times [2021-06-05 15:14:39,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:39,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165686100] [2021-06-05 15:14:39,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:40,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:40,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165686100] [2021-06-05 15:14:40,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165686100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:40,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716684397] [2021-06-05 15:14:40,201 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 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:40,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:40,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:40,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:14:40,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:40,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:40,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:14:40,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:40,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:40,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:40,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:14:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:40,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716684397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:40,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:40,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:14:40,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342643006] [2021-06-05 15:14:40,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:14:40,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:40,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:14:40,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:14:40,464 INFO L87 Difference]: Start difference. First operand 3416 states and 13216 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:43,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:43,073 INFO L93 Difference]: Finished difference Result 4399 states and 16319 transitions. [2021-06-05 15:14:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:14:43,074 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:43,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:43,080 INFO L225 Difference]: With dead ends: 4399 [2021-06-05 15:14:43,081 INFO L226 Difference]: Without dead ends: 4370 [2021-06-05 15:14:43,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2137.0ms TimeCoverageRelationStatistics Valid=553, Invalid=3107, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 15:14:43,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4370 states. [2021-06-05 15:14:43,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4370 to 3419. [2021-06-05 15:14:43,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3419 states, 3418 states have (on average 3.868929198361615) internal successors, (13224), 3418 states have internal predecessors, (13224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:43,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 13224 transitions. [2021-06-05 15:14:43,128 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 13224 transitions. Word has length 24 [2021-06-05 15:14:43,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:43,128 INFO L482 AbstractCegarLoop]: Abstraction has 3419 states and 13224 transitions. [2021-06-05 15:14:43,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:43,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 13224 transitions. [2021-06-05 15:14:43,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:43,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:43,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:43,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-06-05 15:14:43,333 INFO L430 AbstractCegarLoop]: === Iteration 344 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:43,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:43,333 INFO L82 PathProgramCache]: Analyzing trace with hash -268592468, now seen corresponding path program 207 times [2021-06-05 15:14:43,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:43,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322864736] [2021-06-05 15:14:43,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:43,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:43,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322864736] [2021-06-05 15:14:43,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322864736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:43,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178798758] [2021-06-05 15:14:43,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:43,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:14:43,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:43,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:14:43,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:43,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:43,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:14:43,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:14:43,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:43,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:43,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:43,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:14:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:43,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178798758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:43,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:43,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:14:43,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292514900] [2021-06-05 15:14:43,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:14:43,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:43,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:14:43,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:14:43,810 INFO L87 Difference]: Start difference. First operand 3419 states and 13224 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:46,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:46,005 INFO L93 Difference]: Finished difference Result 4271 states and 15932 transitions. [2021-06-05 15:14:46,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:14:46,005 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:46,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:46,013 INFO L225 Difference]: With dead ends: 4271 [2021-06-05 15:14:46,013 INFO L226 Difference]: Without dead ends: 4242 [2021-06-05 15:14:46,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 1768.1ms TimeCoverageRelationStatistics Valid=505, Invalid=3035, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:14:46,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4242 states. [2021-06-05 15:14:46,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4242 to 3415. [2021-06-05 15:14:46,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3415 states, 3414 states have (on average 3.87111892208553) internal successors, (13216), 3414 states have internal predecessors, (13216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:46,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 13216 transitions. [2021-06-05 15:14:46,065 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 13216 transitions. Word has length 24 [2021-06-05 15:14:46,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:46,065 INFO L482 AbstractCegarLoop]: Abstraction has 3415 states and 13216 transitions. [2021-06-05 15:14:46,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:46,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 13216 transitions. [2021-06-05 15:14:46,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:46,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:46,070 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:46,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-06-05 15:14:46,271 INFO L430 AbstractCegarLoop]: === Iteration 345 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:46,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:46,271 INFO L82 PathProgramCache]: Analyzing trace with hash -445133900, now seen corresponding path program 208 times [2021-06-05 15:14:46,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:46,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105022245] [2021-06-05 15:14:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:46,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:46,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105022245] [2021-06-05 15:14:46,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105022245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:46,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221351889] [2021-06-05 15:14:46,459 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 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:46,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:46,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:46,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:46,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:46,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:14:46,603 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:46,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:46,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:46,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:14:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:46,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221351889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:46,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:46,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:14:46,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46077422] [2021-06-05 15:14:46,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:14:46,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:46,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:14:46,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:14:46,653 INFO L87 Difference]: Start difference. First operand 3415 states and 13216 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:47,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:47,696 INFO L93 Difference]: Finished difference Result 4098 states and 15416 transitions. [2021-06-05 15:14:47,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:14:47,696 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:47,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:47,703 INFO L225 Difference]: With dead ends: 4098 [2021-06-05 15:14:47,703 INFO L226 Difference]: Without dead ends: 4089 [2021-06-05 15:14:47,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 891.4ms TimeCoverageRelationStatistics Valid=276, Invalid=1364, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:14:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-06-05 15:14:47,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3420. [2021-06-05 15:14:47,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.869552500731208) internal successors, (13230), 3419 states have internal predecessors, (13230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:47,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 13230 transitions. [2021-06-05 15:14:47,752 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 13230 transitions. Word has length 24 [2021-06-05 15:14:47,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:47,752 INFO L482 AbstractCegarLoop]: Abstraction has 3420 states and 13230 transitions. [2021-06-05 15:14:47,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:47,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 13230 transitions. [2021-06-05 15:14:47,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:47,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:47,757 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:47,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:47,957 INFO L430 AbstractCegarLoop]: === Iteration 346 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:47,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:47,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1278872340, now seen corresponding path program 209 times [2021-06-05 15:14:47,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:47,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348693733] [2021-06-05 15:14:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:48,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:48,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:48,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348693733] [2021-06-05 15:14:48,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348693733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:48,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963442056] [2021-06-05 15:14:48,153 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 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:48,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:14:48,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:48,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:48,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:48,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:14:48,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:48,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:48,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:48,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:14:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:48,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963442056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:48,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:48,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:14:48,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69533671] [2021-06-05 15:14:48,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:14:48,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:48,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:14:48,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:14:48,347 INFO L87 Difference]: Start difference. First operand 3420 states and 13230 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:49,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:49,443 INFO L93 Difference]: Finished difference Result 4071 states and 15334 transitions. [2021-06-05 15:14:49,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:14:49,443 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:49,450 INFO L225 Difference]: With dead ends: 4071 [2021-06-05 15:14:49,450 INFO L226 Difference]: Without dead ends: 4061 [2021-06-05 15:14:49,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 926.6ms TimeCoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:14:49,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2021-06-05 15:14:49,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 3413. [2021-06-05 15:14:49,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8710433763188745) internal successors, (13208), 3412 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:49,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-05 15:14:49,499 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-05 15:14:49,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:49,499 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-05 15:14:49,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:49,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-05 15:14:49,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:49,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:49,504 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:49,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable656 [2021-06-05 15:14:49,704 INFO L430 AbstractCegarLoop]: === Iteration 347 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:49,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:49,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1156910420, now seen corresponding path program 210 times [2021-06-05 15:14:49,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:49,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549291394] [2021-06-05 15:14:49,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:50,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:50,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549291394] [2021-06-05 15:14:50,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549291394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:50,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104134498] [2021-06-05 15:14:50,030 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 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:50,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:14:50,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:50,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:14:50,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:50,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:50,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:50,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:50,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 53 [2021-06-05 15:14:50,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:50,335 INFO L628 ElimStorePlain]: treesize reduction 46, result has 43.9 percent of original size [2021-06-05 15:14:50,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:50,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-06-05 15:14:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:50,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104134498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:50,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:50,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-06-05 15:14:50,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416881981] [2021-06-05 15:14:50,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:50,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:50,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:50,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:50,415 INFO L87 Difference]: Start difference. First operand 3413 states and 13208 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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 15:14:51,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:51,616 INFO L93 Difference]: Finished difference Result 3889 states and 14696 transitions. [2021-06-05 15:14:51,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:14:51,617 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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 24 [2021-06-05 15:14:51,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:51,623 INFO L225 Difference]: With dead ends: 3889 [2021-06-05 15:14:51,623 INFO L226 Difference]: Without dead ends: 3880 [2021-06-05 15:14:51,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1204.5ms TimeCoverageRelationStatistics Valid=361, Invalid=1445, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:14:51,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2021-06-05 15:14:51,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 3413. [2021-06-05 15:14:51,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8710433763188745) internal successors, (13208), 3412 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:51,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-05 15:14:51,669 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-05 15:14:51,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:51,669 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-05 15:14:51,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 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 15:14:51,669 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-05 15:14:51,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:51,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:51,674 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:51,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable657,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:51,874 INFO L430 AbstractCegarLoop]: === Iteration 348 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:51,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:51,875 INFO L82 PathProgramCache]: Analyzing trace with hash 362223946, now seen corresponding path program 211 times [2021-06-05 15:14:51,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:51,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59515502] [2021-06-05 15:14:51,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:51,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:52,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:52,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59515502] [2021-06-05 15:14:52,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59515502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:52,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333518606] [2021-06-05 15:14:52,100 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 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:52,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:52,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:52,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:14:52,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:52,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:52,273 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:52,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:14:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:52,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333518606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:52,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:52,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:14:52,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610173044] [2021-06-05 15:14:52,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:52,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:52,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:52,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:52,302 INFO L87 Difference]: Start difference. First operand 3413 states and 13208 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:53,480 INFO L93 Difference]: Finished difference Result 3907 states and 14738 transitions. [2021-06-05 15:14:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:14:53,481 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:53,487 INFO L225 Difference]: With dead ends: 3907 [2021-06-05 15:14:53,487 INFO L226 Difference]: Without dead ends: 3897 [2021-06-05 15:14:53,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1017.6ms TimeCoverageRelationStatistics Valid=284, Invalid=1608, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:14:53,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3897 states. [2021-06-05 15:14:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3897 to 3413. [2021-06-05 15:14:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8710433763188745) internal successors, (13208), 3412 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:53,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-05 15:14:53,532 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-05 15:14:53,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:53,532 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-05 15:14:53,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:53,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-05 15:14:53,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:53,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:53,536 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:53,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-06-05 15:14:53,737 INFO L430 AbstractCegarLoop]: === Iteration 349 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:53,737 INFO L82 PathProgramCache]: Analyzing trace with hash -665925914, now seen corresponding path program 212 times [2021-06-05 15:14:53,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:53,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021779550] [2021-06-05 15:14:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:53,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:53,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021779550] [2021-06-05 15:14:53,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021779550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:53,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266088956] [2021-06-05 15:14:53,918 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 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:53,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:53,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:53,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:14:53,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:54,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:54,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:14:54,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:54,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:54,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:54,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:14:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:54,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266088956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:54,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:54,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:14:54,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41291505] [2021-06-05 15:14:54,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:54,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:54,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:54,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:54,196 INFO L87 Difference]: Start difference. First operand 3413 states and 13208 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:55,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:55,064 INFO L93 Difference]: Finished difference Result 3822 states and 14477 transitions. [2021-06-05 15:14:55,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:14:55,064 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:55,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:55,071 INFO L225 Difference]: With dead ends: 3822 [2021-06-05 15:14:55,071 INFO L226 Difference]: Without dead ends: 3813 [2021-06-05 15:14:55,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 849.9ms TimeCoverageRelationStatistics Valid=247, Invalid=1313, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:14:55,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-06-05 15:14:55,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 3417. [2021-06-05 15:14:55,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 3.870023419203747) internal successors, (13220), 3416 states have internal predecessors, (13220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:55,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 13220 transitions. [2021-06-05 15:14:55,122 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 13220 transitions. Word has length 24 [2021-06-05 15:14:55,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:55,122 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 13220 transitions. [2021-06-05 15:14:55,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:55,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 13220 transitions. [2021-06-05 15:14:55,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:55,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:55,128 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:55,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable664 [2021-06-05 15:14:55,328 INFO L430 AbstractCegarLoop]: === Iteration 350 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:55,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:55,328 INFO L82 PathProgramCache]: Analyzing trace with hash -342339736, now seen corresponding path program 213 times [2021-06-05 15:14:55,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:55,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438386614] [2021-06-05 15:14:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:55,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:55,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:55,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438386614] [2021-06-05 15:14:55,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438386614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:55,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844792972] [2021-06-05 15:14:55,518 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 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:55,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:14:55,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:55,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:14:55,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:55,688 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:55,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:55,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:55,704 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:55,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:55,705 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 15:14:55,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:55,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844792972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:55,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:55,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:14:55,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599615975] [2021-06-05 15:14:55,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:14:55,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:55,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:14:55,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:14:55,921 INFO L87 Difference]: Start difference. First operand 3417 states and 13220 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:57,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:57,718 INFO L93 Difference]: Finished difference Result 3831 states and 14475 transitions. [2021-06-05 15:14:57,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:14:57,718 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:57,725 INFO L225 Difference]: With dead ends: 3831 [2021-06-05 15:14:57,725 INFO L226 Difference]: Without dead ends: 3822 [2021-06-05 15:14:57,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1679.5ms TimeCoverageRelationStatistics Valid=356, Invalid=2094, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 15:14:57,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-06-05 15:14:57,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3419. [2021-06-05 15:14:57,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3419 states, 3418 states have (on average 3.8695143358689292) internal successors, (13226), 3418 states have internal predecessors, (13226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:57,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3419 states to 3419 states and 13226 transitions. [2021-06-05 15:14:57,770 INFO L78 Accepts]: Start accepts. Automaton has 3419 states and 13226 transitions. Word has length 24 [2021-06-05 15:14:57,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:57,770 INFO L482 AbstractCegarLoop]: Abstraction has 3419 states and 13226 transitions. [2021-06-05 15:14:57,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:57,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3419 states and 13226 transitions. [2021-06-05 15:14:57,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:57,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:57,775 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:57,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-05 15:14:57,975 INFO L430 AbstractCegarLoop]: === Iteration 351 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:57,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:57,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1343404386, now seen corresponding path program 214 times [2021-06-05 15:14:57,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:57,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185962420] [2021-06-05 15:14:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:57,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:58,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:58,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185962420] [2021-06-05 15:14:58,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185962420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:58,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101829347] [2021-06-05 15:14:58,166 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 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:58,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:58,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:58,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:58,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:58,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:14:58,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:58,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:58,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:58,315 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:14:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:58,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101829347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:58,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:58,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:14:58,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170531499] [2021-06-05 15:14:58,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:14:58,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:58,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:14:58,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:14:58,358 INFO L87 Difference]: Start difference. First operand 3419 states and 13226 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:59,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:59,238 INFO L93 Difference]: Finished difference Result 3799 states and 14404 transitions. [2021-06-05 15:14:59,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:14:59,238 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:14:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:59,244 INFO L225 Difference]: With dead ends: 3799 [2021-06-05 15:14:59,244 INFO L226 Difference]: Without dead ends: 3788 [2021-06-05 15:14:59,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 767.9ms TimeCoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:14:59,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3788 states. [2021-06-05 15:14:59,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3788 to 3413. [2021-06-05 15:14:59,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8710433763188745) internal successors, (13208), 3412 states have internal predecessors, (13208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13208 transitions. [2021-06-05 15:14:59,288 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13208 transitions. Word has length 24 [2021-06-05 15:14:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:59,288 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13208 transitions. [2021-06-05 15:14:59,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:59,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13208 transitions. [2021-06-05 15:14:59,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:14:59,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:59,293 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:59,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-05 15:14:59,494 INFO L430 AbstractCegarLoop]: === Iteration 352 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:14:59,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:59,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1891928856, now seen corresponding path program 215 times [2021-06-05 15:14:59,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:59,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141392704] [2021-06-05 15:14:59,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:59,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:59,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:59,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141392704] [2021-06-05 15:14:59,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141392704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:59,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528316056] [2021-06-05 15:14:59,692 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 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:59,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:14:59,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:59,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:59,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:59,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:14:59,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:59,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:59,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:59,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:14:59,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:59,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528316056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:59,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:59,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:14:59,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454763731] [2021-06-05 15:14:59,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:14:59,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:59,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:14:59,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:14:59,901 INFO L87 Difference]: Start difference. First operand 3413 states and 13208 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:01,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:01,101 INFO L93 Difference]: Finished difference Result 3852 states and 14553 transitions. [2021-06-05 15:15:01,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:15:01,102 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:01,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:01,108 INFO L225 Difference]: With dead ends: 3852 [2021-06-05 15:15:01,108 INFO L226 Difference]: Without dead ends: 3843 [2021-06-05 15:15:01,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 978.4ms TimeCoverageRelationStatistics Valid=274, Invalid=1532, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:15:01,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3843 states. [2021-06-05 15:15:01,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3843 to 3410. [2021-06-05 15:15:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3409 states have (on average 3.8712232326195366) internal successors, (13197), 3409 states have internal predecessors, (13197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 13197 transitions. [2021-06-05 15:15:01,153 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 13197 transitions. Word has length 24 [2021-06-05 15:15:01,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:01,153 INFO L482 AbstractCegarLoop]: Abstraction has 3410 states and 13197 transitions. [2021-06-05 15:15:01,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:01,153 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 13197 transitions. [2021-06-05 15:15:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:01,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:01,158 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:01,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable676 [2021-06-05 15:15:01,358 INFO L430 AbstractCegarLoop]: === Iteration 353 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:01,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:01,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1425885276, now seen corresponding path program 216 times [2021-06-05 15:15:01,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:01,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928896261] [2021-06-05 15:15:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:01,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:01,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928896261] [2021-06-05 15:15:01,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928896261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:01,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959340610] [2021-06-05 15:15:01,575 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 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:01,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:15:01,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:01,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:01,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:01,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:01,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:01,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:01,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:01,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 15:15:01,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:15:01,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:01,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:01,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 15:15:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:01,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959340610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:01,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:01,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:15:01,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574027999] [2021-06-05 15:15:01,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:15:01,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:01,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:15:01,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:01,905 INFO L87 Difference]: Start difference. First operand 3410 states and 13197 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:03,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:03,091 INFO L93 Difference]: Finished difference Result 3929 states and 14813 transitions. [2021-06-05 15:15:03,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:15:03,091 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:03,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:03,098 INFO L225 Difference]: With dead ends: 3929 [2021-06-05 15:15:03,098 INFO L226 Difference]: Without dead ends: 3911 [2021-06-05 15:15:03,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 944.9ms TimeCoverageRelationStatistics Valid=256, Invalid=1466, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:15:03,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3911 states. [2021-06-05 15:15:03,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3911 to 3411. [2021-06-05 15:15:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 3.8712609970674485) internal successors, (13201), 3410 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:03,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-05 15:15:03,144 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-05 15:15:03,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:03,144 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-05 15:15:03,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:03,144 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-05 15:15:03,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:03,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:03,149 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:03,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable677,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:03,349 INFO L430 AbstractCegarLoop]: === Iteration 354 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:03,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:03,349 INFO L82 PathProgramCache]: Analyzing trace with hash -82196782, now seen corresponding path program 217 times [2021-06-05 15:15:03,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:03,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152671699] [2021-06-05 15:15:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:03,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:03,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152671699] [2021-06-05 15:15:03,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152671699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:03,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133832468] [2021-06-05 15:15:03,555 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 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:03,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:03,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:03,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:15:03,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:03,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:03,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:03,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:15:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:03,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133832468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:03,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:03,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:15:03,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909677240] [2021-06-05 15:15:03,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:03,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:03,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:03,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:03,763 INFO L87 Difference]: Start difference. First operand 3411 states and 13201 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:05,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:05,179 INFO L93 Difference]: Finished difference Result 3959 states and 14910 transitions. [2021-06-05 15:15:05,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:15:05,180 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:05,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:05,186 INFO L225 Difference]: With dead ends: 3959 [2021-06-05 15:15:05,186 INFO L226 Difference]: Without dead ends: 3940 [2021-06-05 15:15:05,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 1083.3ms TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:15:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3940 states. [2021-06-05 15:15:05,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3940 to 3414. [2021-06-05 15:15:05,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3414 states, 3413 states have (on average 3.8702021681804863) internal successors, (13209), 3413 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:05,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 13209 transitions. [2021-06-05 15:15:05,251 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 13209 transitions. Word has length 24 [2021-06-05 15:15:05,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:05,251 INFO L482 AbstractCegarLoop]: Abstraction has 3414 states and 13209 transitions. [2021-06-05 15:15:05,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:05,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 13209 transitions. [2021-06-05 15:15:05,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:05,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:05,256 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:05,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:05,456 INFO L430 AbstractCegarLoop]: === Iteration 355 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:05,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:05,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1854046730, now seen corresponding path program 218 times [2021-06-05 15:15:05,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:05,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990166323] [2021-06-05 15:15:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:05,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:05,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990166323] [2021-06-05 15:15:05,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990166323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:05,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476522522] [2021-06-05 15:15:05,654 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 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:05,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:05,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:05,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:15:05,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:05,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:05,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:15:05,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:05,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:05,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:05,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:15:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:05,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476522522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:05,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:05,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:15:05,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137480336] [2021-06-05 15:15:05,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:15:05,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:05,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:15:05,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:05,924 INFO L87 Difference]: Start difference. First operand 3414 states and 13209 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:07,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:07,660 INFO L93 Difference]: Finished difference Result 3982 states and 14970 transitions. [2021-06-05 15:15:07,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:15:07,661 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:07,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:07,667 INFO L225 Difference]: With dead ends: 3982 [2021-06-05 15:15:07,667 INFO L226 Difference]: Without dead ends: 3963 [2021-06-05 15:15:07,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1452.1ms TimeCoverageRelationStatistics Valid=440, Invalid=2110, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:15:07,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3963 states. [2021-06-05 15:15:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3963 to 3412. [2021-06-05 15:15:07,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 3411 states have (on average 3.871298739372618) internal successors, (13205), 3411 states have internal predecessors, (13205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:07,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 13205 transitions. [2021-06-05 15:15:07,717 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 13205 transitions. Word has length 24 [2021-06-05 15:15:07,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:07,717 INFO L482 AbstractCegarLoop]: Abstraction has 3412 states and 13205 transitions. [2021-06-05 15:15:07,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:07,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 13205 transitions. [2021-06-05 15:15:07,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:07,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:07,723 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:07,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable682,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:07,923 INFO L430 AbstractCegarLoop]: === Iteration 356 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:07,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:07,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1677505298, now seen corresponding path program 219 times [2021-06-05 15:15:07,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:07,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118961666] [2021-06-05 15:15:07,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:08,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:08,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118961666] [2021-06-05 15:15:08,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118961666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:08,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995963974] [2021-06-05 15:15:08,157 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 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:08,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:15:08,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:08,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:15:08,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:08,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:08,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:08,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:15:08,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:08,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:08,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:08,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:7 [2021-06-05 15:15:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:08,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995963974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:08,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:08,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:15:08,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477477376] [2021-06-05 15:15:08,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:08,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:08,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:08,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:08,436 INFO L87 Difference]: Start difference. First operand 3412 states and 13205 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:09,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:09,396 INFO L93 Difference]: Finished difference Result 3864 states and 14615 transitions. [2021-06-05 15:15:09,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:15:09,397 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:09,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:09,402 INFO L225 Difference]: With dead ends: 3864 [2021-06-05 15:15:09,403 INFO L226 Difference]: Without dead ends: 3855 [2021-06-05 15:15:09,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 935.4ms TimeCoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:15:09,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2021-06-05 15:15:09,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 3415. [2021-06-05 15:15:09,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3415 states, 3414 states have (on average 3.8708260105448153) internal successors, (13215), 3414 states have internal predecessors, (13215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3415 states to 3415 states and 13215 transitions. [2021-06-05 15:15:09,449 INFO L78 Accepts]: Start accepts. Automaton has 3415 states and 13215 transitions. Word has length 24 [2021-06-05 15:15:09,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:09,449 INFO L482 AbstractCegarLoop]: Abstraction has 3415 states and 13215 transitions. [2021-06-05 15:15:09,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:09,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3415 states and 13215 transitions. [2021-06-05 15:15:09,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:09,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:09,454 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:09,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-06-05 15:15:09,655 INFO L430 AbstractCegarLoop]: === Iteration 357 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:09,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:09,655 INFO L82 PathProgramCache]: Analyzing trace with hash 843766858, now seen corresponding path program 220 times [2021-06-05 15:15:09,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:09,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122566480] [2021-06-05 15:15:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:09,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:09,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122566480] [2021-06-05 15:15:09,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122566480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:09,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899220113] [2021-06-05 15:15:09,925 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 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:09,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:09,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:09,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:09,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:10,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:15:10,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:10,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:10,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:10,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:15:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:10,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899220113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:10,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:10,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:15:10,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102710209] [2021-06-05 15:15:10,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:15:10,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:10,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:15:10,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:15:10,120 INFO L87 Difference]: Start difference. First operand 3415 states and 13215 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:11,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:11,132 INFO L93 Difference]: Finished difference Result 3851 states and 14577 transitions. [2021-06-05 15:15:11,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:15:11,132 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:11,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:11,139 INFO L225 Difference]: With dead ends: 3851 [2021-06-05 15:15:11,139 INFO L226 Difference]: Without dead ends: 3841 [2021-06-05 15:15:11,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 853.0ms TimeCoverageRelationStatistics Valid=240, Invalid=1166, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:15:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2021-06-05 15:15:11,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 3411. [2021-06-05 15:15:11,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 3.8712609970674485) internal successors, (13201), 3410 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:11,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-05 15:15:11,190 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-05 15:15:11,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:11,190 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-05 15:15:11,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:11,190 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-05 15:15:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:11,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:11,195 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:11,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-06-05 15:15:11,395 INFO L430 AbstractCegarLoop]: === Iteration 358 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:11,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:11,396 INFO L82 PathProgramCache]: Analyzing trace with hash 564954386, now seen corresponding path program 221 times [2021-06-05 15:15:11,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:11,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410945454] [2021-06-05 15:15:11,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:11,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:11,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410945454] [2021-06-05 15:15:11,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410945454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:11,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367663124] [2021-06-05 15:15:11,610 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 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:11,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:15:11,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:11,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:11,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:11,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:15:11,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:11,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:11,787 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:11,787 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:15:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:11,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367663124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:11,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:11,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:15:11,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170596902] [2021-06-05 15:15:11,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:11,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:11,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:11,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:11,817 INFO L87 Difference]: Start difference. First operand 3411 states and 13201 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:13,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:13,046 INFO L93 Difference]: Finished difference Result 3840 states and 14522 transitions. [2021-06-05 15:15:13,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:15:13,046 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:13,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:13,053 INFO L225 Difference]: With dead ends: 3840 [2021-06-05 15:15:13,053 INFO L226 Difference]: Without dead ends: 3831 [2021-06-05 15:15:13,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 949.1ms TimeCoverageRelationStatistics Valid=269, Invalid=1537, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:15:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3831 states. [2021-06-05 15:15:13,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3831 to 3412. [2021-06-05 15:15:13,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 3411 states have (on average 3.871298739372618) internal successors, (13205), 3411 states have internal predecessors, (13205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:13,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 13205 transitions. [2021-06-05 15:15:13,098 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 13205 transitions. Word has length 24 [2021-06-05 15:15:13,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:13,098 INFO L482 AbstractCegarLoop]: Abstraction has 3412 states and 13205 transitions. [2021-06-05 15:15:13,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:13,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 13205 transitions. [2021-06-05 15:15:13,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:13,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:13,102 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:13,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-06-05 15:15:13,303 INFO L430 AbstractCegarLoop]: === Iteration 359 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:13,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:13,303 INFO L82 PathProgramCache]: Analyzing trace with hash -2001341164, now seen corresponding path program 222 times [2021-06-05 15:15:13,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:13,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095263221] [2021-06-05 15:15:13,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:13,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:13,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095263221] [2021-06-05 15:15:13,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095263221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:13,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892939678] [2021-06-05 15:15:13,500 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 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:13,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:15:13,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:13,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:13,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:13,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:13,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:13,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:13,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:13,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 15:15:13,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:15:13,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:13,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:13,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:40, output treesize:21 [2021-06-05 15:15:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:13,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892939678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:13,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:13,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:15:13,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159231308] [2021-06-05 15:15:13,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:15:13,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:13,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:15:13,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:13,851 INFO L87 Difference]: Start difference. First operand 3412 states and 13205 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:15,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:15,161 INFO L93 Difference]: Finished difference Result 3889 states and 14648 transitions. [2021-06-05 15:15:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:15:15,161 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:15,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:15,168 INFO L225 Difference]: With dead ends: 3889 [2021-06-05 15:15:15,168 INFO L226 Difference]: Without dead ends: 3870 [2021-06-05 15:15:15,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 982.2ms TimeCoverageRelationStatistics Valid=244, Invalid=1396, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:15:15,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2021-06-05 15:15:15,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3413. [2021-06-05 15:15:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8713364595545134) internal successors, (13209), 3412 states have internal predecessors, (13209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13209 transitions. [2021-06-05 15:15:15,216 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13209 transitions. Word has length 24 [2021-06-05 15:15:15,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:15,216 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13209 transitions. [2021-06-05 15:15:15,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:15,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13209 transitions. [2021-06-05 15:15:15,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:15,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:15,220 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:15,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable688,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:15,421 INFO L430 AbstractCegarLoop]: === Iteration 360 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:15,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:15,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1265476272, now seen corresponding path program 223 times [2021-06-05 15:15:15,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:15,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562840416] [2021-06-05 15:15:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:15,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:15,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562840416] [2021-06-05 15:15:15,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562840416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:15,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748308503] [2021-06-05 15:15:15,607 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 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:15,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:15,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:15,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:15:15,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:15,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:15,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:15,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:15:15,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:15,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748308503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:15,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:15,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:15:15,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682104273] [2021-06-05 15:15:15,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:15:15,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:15,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:15:15,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:15:15,808 INFO L87 Difference]: Start difference. First operand 3413 states and 13209 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:16,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:16,874 INFO L93 Difference]: Finished difference Result 3870 states and 14613 transitions. [2021-06-05 15:15:16,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:15:16,874 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:16,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:16,881 INFO L225 Difference]: With dead ends: 3870 [2021-06-05 15:15:16,881 INFO L226 Difference]: Without dead ends: 3861 [2021-06-05 15:15:16,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 832.8ms TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:15:16,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3861 states. [2021-06-05 15:15:16,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3861 to 3416. [2021-06-05 15:15:16,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3415 states have (on average 3.8708638360175693) internal successors, (13219), 3415 states have internal predecessors, (13219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:16,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 13219 transitions. [2021-06-05 15:15:16,929 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 13219 transitions. Word has length 24 [2021-06-05 15:15:16,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:16,929 INFO L482 AbstractCegarLoop]: Abstraction has 3416 states and 13219 transitions. [2021-06-05 15:15:16,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:16,929 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 13219 transitions. [2021-06-05 15:15:16,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:16,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:16,933 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:17,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable692,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:17,134 INFO L430 AbstractCegarLoop]: === Iteration 361 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:17,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:17,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1589062450, now seen corresponding path program 224 times [2021-06-05 15:15:17,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:17,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199143982] [2021-06-05 15:15:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:17,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:17,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:17,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199143982] [2021-06-05 15:15:17,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199143982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:17,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806628110] [2021-06-05 15:15:17,325 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 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:17,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:17,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:17,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:15:17,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:17,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:17,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:15:17,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:17,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:17,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:17,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:15:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:17,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806628110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:17,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:17,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:15:17,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690321309] [2021-06-05 15:15:17,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:17,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:17,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:17,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:17,600 INFO L87 Difference]: Start difference. First operand 3416 states and 13219 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:18,686 INFO L93 Difference]: Finished difference Result 3861 states and 14586 transitions. [2021-06-05 15:15:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:15:18,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:18,693 INFO L225 Difference]: With dead ends: 3861 [2021-06-05 15:15:18,694 INFO L226 Difference]: Without dead ends: 3848 [2021-06-05 15:15:18,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 938.2ms TimeCoverageRelationStatistics Valid=261, Invalid=1461, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:15:18,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2021-06-05 15:15:18,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 3411. [2021-06-05 15:15:18,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 3.8712609970674485) internal successors, (13201), 3410 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:18,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-05 15:15:18,768 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-05 15:15:18,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:18,768 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-05 15:15:18,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:18,768 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-05 15:15:18,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:18,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:18,773 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:18,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable693 [2021-06-05 15:15:18,974 INFO L430 AbstractCegarLoop]: === Iteration 362 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:18,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:18,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1707034270, now seen corresponding path program 225 times [2021-06-05 15:15:18,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:18,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358730616] [2021-06-05 15:15:18,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:19,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:19,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358730616] [2021-06-05 15:15:19,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358730616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:19,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770885818] [2021-06-05 15:15:19,174 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 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:19,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:15:19,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:19,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:15:19,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:19,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:19,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:19,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 44 [2021-06-05 15:15:19,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:19,434 INFO L628 ElimStorePlain]: treesize reduction 14, result has 70.2 percent of original size [2021-06-05 15:15:19,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:19,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:43 [2021-06-05 15:15:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:19,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770885818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:19,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:19,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:15:19,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782006818] [2021-06-05 15:15:19,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:15:19,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:19,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:15:19,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:15:19,500 INFO L87 Difference]: Start difference. First operand 3411 states and 13201 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:20,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:20,698 INFO L93 Difference]: Finished difference Result 3920 states and 14728 transitions. [2021-06-05 15:15:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:15:20,699 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:20,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:20,706 INFO L225 Difference]: With dead ends: 3920 [2021-06-05 15:15:20,706 INFO L226 Difference]: Without dead ends: 3892 [2021-06-05 15:15:20,706 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 925.0ms TimeCoverageRelationStatistics Valid=264, Invalid=1542, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:15:20,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2021-06-05 15:15:20,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 3413. [2021-06-05 15:15:20,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 3.8707502930832356) internal successors, (13207), 3412 states have internal predecessors, (13207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:20,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 13207 transitions. [2021-06-05 15:15:20,755 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 13207 transitions. Word has length 24 [2021-06-05 15:15:20,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:20,755 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 13207 transitions. [2021-06-05 15:15:20,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:20,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 13207 transitions. [2021-06-05 15:15:20,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:20,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:20,761 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:20,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-06-05 15:15:20,961 INFO L430 AbstractCegarLoop]: === Iteration 363 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:20,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:20,961 INFO L82 PathProgramCache]: Analyzing trace with hash -442736788, now seen corresponding path program 226 times [2021-06-05 15:15:20,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:20,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125616190] [2021-06-05 15:15:20,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:21,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:21,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:21,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125616190] [2021-06-05 15:15:21,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125616190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:21,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698107244] [2021-06-05 15:15:21,175 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 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:21,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:21,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:21,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:21,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:21,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:15:21,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:21,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:21,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:21,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:15:21,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:21,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698107244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:21,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:21,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:15:21,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336359647] [2021-06-05 15:15:21,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:21,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:21,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:21,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:21,376 INFO L87 Difference]: Start difference. First operand 3413 states and 13207 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:22,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:22,604 INFO L93 Difference]: Finished difference Result 3873 states and 14628 transitions. [2021-06-05 15:15:22,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:15:22,604 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:22,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:22,610 INFO L225 Difference]: With dead ends: 3873 [2021-06-05 15:15:22,610 INFO L226 Difference]: Without dead ends: 3854 [2021-06-05 15:15:22,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 954.1ms TimeCoverageRelationStatistics Valid=287, Invalid=1519, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:15:22,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3854 states. [2021-06-05 15:15:22,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3854 to 3412. [2021-06-05 15:15:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 3411 states have (on average 3.871298739372618) internal successors, (13205), 3411 states have internal predecessors, (13205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:22,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 13205 transitions. [2021-06-05 15:15:22,656 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 13205 transitions. Word has length 24 [2021-06-05 15:15:22,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:22,656 INFO L482 AbstractCegarLoop]: Abstraction has 3412 states and 13205 transitions. [2021-06-05 15:15:22,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:22,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 13205 transitions. [2021-06-05 15:15:22,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:22,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:22,661 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:22,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable700,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:22,862 INFO L430 AbstractCegarLoop]: === Iteration 364 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:22,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:22,862 INFO L82 PathProgramCache]: Analyzing trace with hash -619278220, now seen corresponding path program 227 times [2021-06-05 15:15:22,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:22,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092898558] [2021-06-05 15:15:22,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:23,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:23,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092898558] [2021-06-05 15:15:23,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092898558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:23,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826347701] [2021-06-05 15:15:23,044 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 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:23,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:23,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:23,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:23,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:23,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:15:23,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:23,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:23,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:23,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:15:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:23,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826347701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:23,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:23,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:15:23,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744331888] [2021-06-05 15:15:23,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:15:23,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:23,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:15:23,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:15:23,261 INFO L87 Difference]: Start difference. First operand 3412 states and 13205 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:24,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:24,135 INFO L93 Difference]: Finished difference Result 3806 states and 14423 transitions. [2021-06-05 15:15:24,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:15:24,136 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:24,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:24,142 INFO L225 Difference]: With dead ends: 3806 [2021-06-05 15:15:24,143 INFO L226 Difference]: Without dead ends: 3797 [2021-06-05 15:15:24,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 768.2ms TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:15:24,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3797 states. [2021-06-05 15:15:24,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3797 to 3414. [2021-06-05 15:15:24,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3414 states, 3413 states have (on average 3.8713741576325815) internal successors, (13213), 3413 states have internal predecessors, (13213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 13213 transitions. [2021-06-05 15:15:24,192 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 13213 transitions. Word has length 24 [2021-06-05 15:15:24,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:24,192 INFO L482 AbstractCegarLoop]: Abstraction has 3414 states and 13213 transitions. [2021-06-05 15:15:24,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:24,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 13213 transitions. [2021-06-05 15:15:24,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:24,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:24,197 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:24,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-06-05 15:15:24,398 INFO L430 AbstractCegarLoop]: === Iteration 365 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:24,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:24,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1453016660, now seen corresponding path program 228 times [2021-06-05 15:15:24,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:24,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376816439] [2021-06-05 15:15:24,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:24,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:24,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376816439] [2021-06-05 15:15:24,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376816439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:24,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641812990] [2021-06-05 15:15:24,591 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 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:24,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:15:24,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:24,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:15:24,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:24,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:24,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:24,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:15:24,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:24,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:24,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:24,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:7 [2021-06-05 15:15:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:24,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641812990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:24,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:24,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:15:24,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135584669] [2021-06-05 15:15:24,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:24,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:24,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:24,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:24,827 INFO L87 Difference]: Start difference. First operand 3414 states and 13213 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:25,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:25,775 INFO L93 Difference]: Finished difference Result 3783 states and 14356 transitions. [2021-06-05 15:15:25,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:15:25,775 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:25,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:25,781 INFO L225 Difference]: With dead ends: 3783 [2021-06-05 15:15:25,781 INFO L226 Difference]: Without dead ends: 3773 [2021-06-05 15:15:25,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 819.3ms TimeCoverageRelationStatistics Valid=248, Invalid=1158, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:15:25,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3773 states. [2021-06-05 15:15:25,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3773 to 3411. [2021-06-05 15:15:25,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 3.8712609970674485) internal successors, (13201), 3410 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:25,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-05 15:15:25,826 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-05 15:15:25,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:25,826 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-05 15:15:25,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:25,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-05 15:15:25,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:25,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:25,831 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:26,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable702,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:26,031 INFO L430 AbstractCegarLoop]: === Iteration 366 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:26,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:26,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1240546540, now seen corresponding path program 229 times [2021-06-05 15:15:26,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:26,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006313610] [2021-06-05 15:15:26,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:26,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:26,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006313610] [2021-06-05 15:15:26,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006313610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:26,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359676839] [2021-06-05 15:15:26,221 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 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:26,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:26,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:26,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:15:26,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:26,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:26,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:26,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:15:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:26,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359676839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:26,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:26,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:15:26,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565693190] [2021-06-05 15:15:26,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:26,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:26,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:26,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:26,422 INFO L87 Difference]: Start difference. First operand 3411 states and 13201 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:27,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:27,426 INFO L93 Difference]: Finished difference Result 3883 states and 14653 transitions. [2021-06-05 15:15:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:15:27,426 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:27,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:27,432 INFO L225 Difference]: With dead ends: 3883 [2021-06-05 15:15:27,432 INFO L226 Difference]: Without dead ends: 3864 [2021-06-05 15:15:27,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 826.6ms TimeCoverageRelationStatistics Valid=246, Invalid=1394, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:15:27,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-06-05 15:15:27,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3411. [2021-06-05 15:15:27,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 3410 states have (on average 3.8712609970674485) internal successors, (13201), 3410 states have internal predecessors, (13201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:27,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 13201 transitions. [2021-06-05 15:15:27,506 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 13201 transitions. Word has length 24 [2021-06-05 15:15:27,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:27,506 INFO L482 AbstractCegarLoop]: Abstraction has 3411 states and 13201 transitions. [2021-06-05 15:15:27,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:27,506 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 13201 transitions. [2021-06-05 15:15:27,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:27,511 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:27,511 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:27,711 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable703,355 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:27,711 INFO L430 AbstractCegarLoop]: === Iteration 367 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:27,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:27,712 INFO L82 PathProgramCache]: Analyzing trace with hash 212396680, now seen corresponding path program 230 times [2021-06-05 15:15:27,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:27,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598998347] [2021-06-05 15:15:27,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:27,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:27,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598998347] [2021-06-05 15:15:27,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598998347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:27,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750971268] [2021-06-05 15:15:27,884 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 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:27,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:27,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:27,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:15:27,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:28,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:28,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:15:28,050 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:28,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:28,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:28,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:15:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:28,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750971268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:28,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:28,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:15:28,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130491170] [2021-06-05 15:15:28,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:28,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:28,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:28,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:28,142 INFO L87 Difference]: Start difference. First operand 3411 states and 13201 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:29,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:29,089 INFO L93 Difference]: Finished difference Result 3872 states and 14637 transitions. [2021-06-05 15:15:29,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:15:29,090 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:29,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:29,096 INFO L225 Difference]: With dead ends: 3872 [2021-06-05 15:15:29,096 INFO L226 Difference]: Without dead ends: 3862 [2021-06-05 15:15:29,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 850.7ms TimeCoverageRelationStatistics Valid=279, Invalid=1527, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:15:29,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-06-05 15:15:29,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 3414. [2021-06-05 15:15:29,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3414 states, 3413 states have (on average 3.8710811602695574) internal successors, (13212), 3413 states have internal predecessors, (13212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 13212 transitions. [2021-06-05 15:15:29,142 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 13212 transitions. Word has length 24 [2021-06-05 15:15:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:29,142 INFO L482 AbstractCegarLoop]: Abstraction has 3414 states and 13212 transitions. [2021-06-05 15:15:29,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 13212 transitions. [2021-06-05 15:15:29,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:29,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:29,147 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:29,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:29,347 INFO L430 AbstractCegarLoop]: === Iteration 368 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:29,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:29,348 INFO L82 PathProgramCache]: Analyzing trace with hash 535982858, now seen corresponding path program 231 times [2021-06-05 15:15:29,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:29,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590208851] [2021-06-05 15:15:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:29,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:29,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590208851] [2021-06-05 15:15:29,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590208851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:29,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801583716] [2021-06-05 15:15:29,532 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 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:29,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:15:29,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:29,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:15:29,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:29,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:29,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:29,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:29,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:29,743 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:29,743 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 15:15:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:29,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801583716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:29,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:29,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:15:29,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69197249] [2021-06-05 15:15:29,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:15:29,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:29,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:15:29,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:29,944 INFO L87 Difference]: Start difference. First operand 3414 states and 13212 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:30,640 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 15:15:31,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:31,929 INFO L93 Difference]: Finished difference Result 4016 states and 14984 transitions. [2021-06-05 15:15:31,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:15:31,930 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:31,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:31,937 INFO L225 Difference]: With dead ends: 4016 [2021-06-05 15:15:31,937 INFO L226 Difference]: Without dead ends: 3997 [2021-06-05 15:15:31,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 1767.0ms TimeCoverageRelationStatistics Valid=413, Invalid=2343, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:15:31,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3997 states. [2021-06-05 15:15:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3997 to 3426. [2021-06-05 15:15:32,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3426 states, 3425 states have (on average 3.8703649635036497) internal successors, (13256), 3425 states have internal predecessors, (13256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3426 states to 3426 states and 13256 transitions. [2021-06-05 15:15:32,009 INFO L78 Accepts]: Start accepts. Automaton has 3426 states and 13256 transitions. Word has length 24 [2021-06-05 15:15:32,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:32,009 INFO L482 AbstractCegarLoop]: Abstraction has 3426 states and 13256 transitions. [2021-06-05 15:15:32,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:32,010 INFO L276 IsEmpty]: Start isEmpty. Operand 3426 states and 13256 transitions. [2021-06-05 15:15:32,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:32,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:32,014 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:32,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:32,215 INFO L430 AbstractCegarLoop]: === Iteration 369 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:32,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:32,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2073240316, now seen corresponding path program 232 times [2021-06-05 15:15:32,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:32,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625302805] [2021-06-05 15:15:32,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:32,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:32,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625302805] [2021-06-05 15:15:32,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625302805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:32,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894764855] [2021-06-05 15:15:32,404 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 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:32,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:32,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:32,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:32,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:32,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:15:32,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:32,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:32,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:32,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:15:32,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:32,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894764855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:32,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:32,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:15:32,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045870329] [2021-06-05 15:15:32,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:15:32,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:32,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:15:32,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:15:32,612 INFO L87 Difference]: Start difference. First operand 3426 states and 13256 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:33,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:33,533 INFO L93 Difference]: Finished difference Result 3782 states and 14374 transitions. [2021-06-05 15:15:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:15:33,533 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:33,539 INFO L225 Difference]: With dead ends: 3782 [2021-06-05 15:15:33,539 INFO L226 Difference]: Without dead ends: 3767 [2021-06-05 15:15:33,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 751.1ms TimeCoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:15:33,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2021-06-05 15:15:33,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3420. [2021-06-05 15:15:33,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.870722433460076) internal successors, (13234), 3419 states have internal predecessors, (13234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 13234 transitions. [2021-06-05 15:15:33,586 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 13234 transitions. Word has length 24 [2021-06-05 15:15:33,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:33,586 INFO L482 AbstractCegarLoop]: Abstraction has 3420 states and 13234 transitions. [2021-06-05 15:15:33,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:33,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 13234 transitions. [2021-06-05 15:15:33,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:33,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:33,591 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:33,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:33,791 INFO L430 AbstractCegarLoop]: === Iteration 370 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:33,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:33,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1859993244, now seen corresponding path program 233 times [2021-06-05 15:15:33,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:33,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096227663] [2021-06-05 15:15:33,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:33,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:33,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096227663] [2021-06-05 15:15:33,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096227663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:33,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357446004] [2021-06-05 15:15:33,980 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 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:34,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:15:34,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:34,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:34,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:34,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:15:34,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:34,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:34,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:34,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:15:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:34,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357446004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:34,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:34,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:15:34,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992398163] [2021-06-05 15:15:34,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:34,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:34,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:34,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:34,182 INFO L87 Difference]: Start difference. First operand 3420 states and 13234 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:35,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:35,311 INFO L93 Difference]: Finished difference Result 3906 states and 14738 transitions. [2021-06-05 15:15:35,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:15:35,311 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:35,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:35,318 INFO L225 Difference]: With dead ends: 3906 [2021-06-05 15:15:35,318 INFO L226 Difference]: Without dead ends: 3887 [2021-06-05 15:15:35,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 839.7ms TimeCoverageRelationStatistics Valid=263, Invalid=1377, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:15:35,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3887 states. [2021-06-05 15:15:35,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3887 to 3420. [2021-06-05 15:15:35,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 3.870722433460076) internal successors, (13234), 3419 states have internal predecessors, (13234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 13234 transitions. [2021-06-05 15:15:35,366 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 13234 transitions. Word has length 24 [2021-06-05 15:15:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:35,366 INFO L482 AbstractCegarLoop]: Abstraction has 3420 states and 13234 transitions. [2021-06-05 15:15:35,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:35,366 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 13234 transitions. [2021-06-05 15:15:35,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:35,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:35,371 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:35,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable716 [2021-06-05 15:15:35,572 INFO L430 AbstractCegarLoop]: === Iteration 371 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:35,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:35,572 INFO L82 PathProgramCache]: Analyzing trace with hash 2077418130, now seen corresponding path program 234 times [2021-06-05 15:15:35,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:35,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306392904] [2021-06-05 15:15:35,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:35,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:35,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306392904] [2021-06-05 15:15:35,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306392904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:35,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17513959] [2021-06-05 15:15:35,753 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 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:35,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:15:35,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:35,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:15:35,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:35,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:35,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:15:35,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:35,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:35,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:35,918 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:15:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:36,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17513959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:36,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:36,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:15:36,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396141] [2021-06-05 15:15:36,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:36,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:36,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:36,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:36,010 INFO L87 Difference]: Start difference. First operand 3420 states and 13234 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:37,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:37,187 INFO L93 Difference]: Finished difference Result 3932 states and 14799 transitions. [2021-06-05 15:15:37,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:15:37,187 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:37,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:37,194 INFO L225 Difference]: With dead ends: 3932 [2021-06-05 15:15:37,194 INFO L226 Difference]: Without dead ends: 3913 [2021-06-05 15:15:37,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1078.2ms TimeCoverageRelationStatistics Valid=368, Invalid=1612, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:15:37,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3913 states. [2021-06-05 15:15:37,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3913 to 3425. [2021-06-05 15:15:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3425 states, 3424 states have (on average 3.8703271028037385) internal successors, (13252), 3424 states have internal predecessors, (13252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3425 states to 3425 states and 13252 transitions. [2021-06-05 15:15:37,262 INFO L78 Accepts]: Start accepts. Automaton has 3425 states and 13252 transitions. Word has length 24 [2021-06-05 15:15:37,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:37,262 INFO L482 AbstractCegarLoop]: Abstraction has 3425 states and 13252 transitions. [2021-06-05 15:15:37,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:37,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3425 states and 13252 transitions. [2021-06-05 15:15:37,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:37,267 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:37,267 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:37,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:37,468 INFO L430 AbstractCegarLoop]: === Iteration 372 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:37,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:37,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1243679690, now seen corresponding path program 235 times [2021-06-05 15:15:37,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:37,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702269146] [2021-06-05 15:15:37,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:37,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:37,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:37,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702269146] [2021-06-05 15:15:37,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702269146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:37,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762626204] [2021-06-05 15:15:37,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:37,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:37,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:37,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:37,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:15:37,803 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:37,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:37,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:37,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:15:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:37,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762626204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:37,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:37,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:15:37,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114309988] [2021-06-05 15:15:37,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:15:37,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:37,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:15:37,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:15:37,852 INFO L87 Difference]: Start difference. First operand 3425 states and 13252 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:38,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:38,584 INFO L93 Difference]: Finished difference Result 3894 states and 14709 transitions. [2021-06-05 15:15:38,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:15:38,585 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:38,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:38,591 INFO L225 Difference]: With dead ends: 3894 [2021-06-05 15:15:38,591 INFO L226 Difference]: Without dead ends: 3882 [2021-06-05 15:15:38,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 651.9ms TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:15:38,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2021-06-05 15:15:38,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3422. [2021-06-05 15:15:38,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3422 states, 3421 states have (on average 3.8705057000876937) internal successors, (13241), 3421 states have internal predecessors, (13241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:38,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 13241 transitions. [2021-06-05 15:15:38,638 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 13241 transitions. Word has length 24 [2021-06-05 15:15:38,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:38,638 INFO L482 AbstractCegarLoop]: Abstraction has 3422 states and 13241 transitions. [2021-06-05 15:15:38,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:38,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 13241 transitions. [2021-06-05 15:15:38,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:38,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:38,642 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:38,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable720 [2021-06-05 15:15:38,843 INFO L430 AbstractCegarLoop]: === Iteration 373 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:38,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:38,843 INFO L82 PathProgramCache]: Analyzing trace with hash 411054290, now seen corresponding path program 236 times [2021-06-05 15:15:38,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:38,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175020503] [2021-06-05 15:15:38,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:39,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:39,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:39,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175020503] [2021-06-05 15:15:39,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175020503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:39,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195472657] [2021-06-05 15:15:39,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:39,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:39,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:39,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:15:39,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:39,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:39,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:15:39,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:39,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:39,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:39,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:15:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:39,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195472657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:39,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:39,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:15:39,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297759236] [2021-06-05 15:15:39,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:39,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:39,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:39,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:39,294 INFO L87 Difference]: Start difference. First operand 3422 states and 13241 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:40,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:40,399 INFO L93 Difference]: Finished difference Result 3835 states and 14527 transitions. [2021-06-05 15:15:40,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:15:40,400 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:40,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:40,407 INFO L225 Difference]: With dead ends: 3835 [2021-06-05 15:15:40,407 INFO L226 Difference]: Without dead ends: 3826 [2021-06-05 15:15:40,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 914.3ms TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:15:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2021-06-05 15:15:40,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 3424. [2021-06-05 15:15:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3424 states, 3423 states have (on average 3.8702892199824714) internal successors, (13248), 3423 states have internal predecessors, (13248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:40,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3424 states to 3424 states and 13248 transitions. [2021-06-05 15:15:40,458 INFO L78 Accepts]: Start accepts. Automaton has 3424 states and 13248 transitions. Word has length 24 [2021-06-05 15:15:40,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:40,458 INFO L482 AbstractCegarLoop]: Abstraction has 3424 states and 13248 transitions. [2021-06-05 15:15:40,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:40,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3424 states and 13248 transitions. [2021-06-05 15:15:40,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:40,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:40,463 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:40,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable721,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:40,664 INFO L430 AbstractCegarLoop]: === Iteration 374 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:40,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:40,664 INFO L82 PathProgramCache]: Analyzing trace with hash 734640468, now seen corresponding path program 237 times [2021-06-05 15:15:40,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:40,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358854095] [2021-06-05 15:15:40,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:40,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:40,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:40,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358854095] [2021-06-05 15:15:40,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358854095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:40,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840419821] [2021-06-05 15:15:40,859 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 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:40,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:15:40,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:40,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:40,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:40,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:41,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:41,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:15:41,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:41,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:41,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:41,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:49 [2021-06-05 15:15:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:41,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840419821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:41,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:41,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-06-05 15:15:41,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735861616] [2021-06-05 15:15:41,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:15:41,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:41,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:15:41,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:41,211 INFO L87 Difference]: Start difference. First operand 3424 states and 13248 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:42,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:42,720 INFO L93 Difference]: Finished difference Result 3901 states and 14689 transitions. [2021-06-05 15:15:42,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:15:42,720 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:42,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:42,727 INFO L225 Difference]: With dead ends: 3901 [2021-06-05 15:15:42,727 INFO L226 Difference]: Without dead ends: 3890 [2021-06-05 15:15:42,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1298.5ms TimeCoverageRelationStatistics Valid=408, Invalid=1944, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 15:15:42,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3890 states. [2021-06-05 15:15:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3890 to 3430. [2021-06-05 15:15:42,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8710994459025954) internal successors, (13274), 3429 states have internal predecessors, (13274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13274 transitions. [2021-06-05 15:15:42,778 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13274 transitions. Word has length 24 [2021-06-05 15:15:42,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:42,778 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13274 transitions. [2021-06-05 15:15:42,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:42,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13274 transitions. [2021-06-05 15:15:42,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:42,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:42,783 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:42,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-06-05 15:15:42,984 INFO L430 AbstractCegarLoop]: === Iteration 375 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:42,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:42,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1874582706, now seen corresponding path program 238 times [2021-06-05 15:15:42,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:42,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111583666] [2021-06-05 15:15:42,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:43,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:43,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111583666] [2021-06-05 15:15:43,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111583666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:43,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241104206] [2021-06-05 15:15:43,170 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 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:43,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:43,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:43,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:43,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:43,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:15:43,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:43,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:43,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:43,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:15:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:43,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241104206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:43,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:43,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-06-05 15:15:43,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299168155] [2021-06-05 15:15:43,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:15:43,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:43,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:15:43,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:15:43,376 INFO L87 Difference]: Start difference. First operand 3430 states and 13274 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:44,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:44,026 INFO L93 Difference]: Finished difference Result 3785 states and 14377 transitions. [2021-06-05 15:15:44,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:15:44,026 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:44,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:44,033 INFO L225 Difference]: With dead ends: 3785 [2021-06-05 15:15:44,033 INFO L226 Difference]: Without dead ends: 3774 [2021-06-05 15:15:44,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 600.6ms TimeCoverageRelationStatistics Valid=202, Invalid=920, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:15:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3774 states. [2021-06-05 15:15:44,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3774 to 3429. [2021-06-05 15:15:44,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.870770128354726) internal successors, (13269), 3428 states have internal predecessors, (13269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:44,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 13269 transitions. [2021-06-05 15:15:44,084 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 13269 transitions. Word has length 24 [2021-06-05 15:15:44,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:44,084 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 13269 transitions. [2021-06-05 15:15:44,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:44,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 13269 transitions. [2021-06-05 15:15:44,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:44,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:44,089 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:44,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable728,364 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:44,289 INFO L430 AbstractCegarLoop]: === Iteration 376 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:44,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:44,290 INFO L82 PathProgramCache]: Analyzing trace with hash 708131106, now seen corresponding path program 239 times [2021-06-05 15:15:44,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:44,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421906024] [2021-06-05 15:15:44,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:44,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:44,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421906024] [2021-06-05 15:15:44,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421906024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:44,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482159862] [2021-06-05 15:15:44,493 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 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:44,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:15:44,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:44,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:44,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:44,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:15:44,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:44,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:44,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:44,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:15:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:44,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482159862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:44,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:44,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:15:44,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536969664] [2021-06-05 15:15:44,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:15:44,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:44,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:15:44,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:15:44,687 INFO L87 Difference]: Start difference. First operand 3429 states and 13269 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:45,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:45,651 INFO L93 Difference]: Finished difference Result 3822 states and 14496 transitions. [2021-06-05 15:15:45,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:15:45,651 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:45,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:45,657 INFO L225 Difference]: With dead ends: 3822 [2021-06-05 15:15:45,658 INFO L226 Difference]: Without dead ends: 3813 [2021-06-05 15:15:45,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 775.4ms TimeCoverageRelationStatistics Valid=259, Invalid=1223, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:15:45,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2021-06-05 15:15:45,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 3430. [2021-06-05 15:15:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8708078156897057) internal successors, (13273), 3429 states have internal predecessors, (13273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:45,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-05 15:15:45,702 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-05 15:15:45,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:45,702 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-05 15:15:45,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:45,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-05 15:15:45,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:45,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:45,707 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:45,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:45,908 INFO L430 AbstractCegarLoop]: === Iteration 377 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:45,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:45,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1082730068, now seen corresponding path program 240 times [2021-06-05 15:15:45,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:45,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230389538] [2021-06-05 15:15:45,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:46,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:46,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230389538] [2021-06-05 15:15:46,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230389538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:46,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395539038] [2021-06-05 15:15:46,107 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 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:46,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:15:46,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:46,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:15:46,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:46,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:46,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:15:46,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:46,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:46,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:46,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:15:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:46,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395539038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:46,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:46,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:15:46,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481705906] [2021-06-05 15:15:46,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:46,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:46,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:46,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:46,362 INFO L87 Difference]: Start difference. First operand 3430 states and 13273 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:47,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:47,227 INFO L93 Difference]: Finished difference Result 3812 states and 14469 transitions. [2021-06-05 15:15:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:15:47,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:47,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:47,235 INFO L225 Difference]: With dead ends: 3812 [2021-06-05 15:15:47,235 INFO L226 Difference]: Without dead ends: 3802 [2021-06-05 15:15:47,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 780.7ms TimeCoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:15:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2021-06-05 15:15:47,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 3429. [2021-06-05 15:15:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.870770128354726) internal successors, (13269), 3428 states have internal predecessors, (13269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:47,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 13269 transitions. [2021-06-05 15:15:47,293 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 13269 transitions. Word has length 24 [2021-06-05 15:15:47,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:47,293 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 13269 transitions. [2021-06-05 15:15:47,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:47,293 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 13269 transitions. [2021-06-05 15:15:47,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:47,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:47,299 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:47,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable730 [2021-06-05 15:15:47,499 INFO L430 AbstractCegarLoop]: === Iteration 378 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:47,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:47,499 INFO L82 PathProgramCache]: Analyzing trace with hash 644159276, now seen corresponding path program 241 times [2021-06-05 15:15:47,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:47,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412069706] [2021-06-05 15:15:47,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:47,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:47,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:47,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:47,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412069706] [2021-06-05 15:15:47,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412069706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:47,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876575039] [2021-06-05 15:15:47,696 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 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:47,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:47,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:47,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:47,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:15:47,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:47,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:47,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:47,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:10 [2021-06-05 15:15:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:47,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876575039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:47,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:47,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:15:47,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851783356] [2021-06-05 15:15:47,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:15:47,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:47,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:15:47,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:15:47,913 INFO L87 Difference]: Start difference. First operand 3429 states and 13269 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:48,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:48,635 INFO L93 Difference]: Finished difference Result 3817 states and 14487 transitions. [2021-06-05 15:15:48,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:15:48,635 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:48,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:48,642 INFO L225 Difference]: With dead ends: 3817 [2021-06-05 15:15:48,642 INFO L226 Difference]: Without dead ends: 3806 [2021-06-05 15:15:48,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 672.5ms TimeCoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:15:48,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-06-05 15:15:48,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3431. [2021-06-05 15:15:48,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3430 states have (on average 3.870262390670554) internal successors, (13275), 3430 states have internal predecessors, (13275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:48,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 13275 transitions. [2021-06-05 15:15:48,691 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 13275 transitions. Word has length 24 [2021-06-05 15:15:48,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:48,691 INFO L482 AbstractCegarLoop]: Abstraction has 3431 states and 13275 transitions. [2021-06-05 15:15:48,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:48,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 13275 transitions. [2021-06-05 15:15:48,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:48,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:48,696 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:48,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable732,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:48,897 INFO L430 AbstractCegarLoop]: === Iteration 379 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:48,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:48,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1623573724, now seen corresponding path program 242 times [2021-06-05 15:15:48,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:48,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528105403] [2021-06-05 15:15:48,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:49,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:49,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528105403] [2021-06-05 15:15:49,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528105403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:49,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514040391] [2021-06-05 15:15:49,094 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 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:49,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:49,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:49,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:15:49,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:49,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:49,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:15:49,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:49,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:49,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:49,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:15:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:49,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514040391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:49,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:49,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:15:49,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930107918] [2021-06-05 15:15:49,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:49,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:49,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:49,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:49,373 INFO L87 Difference]: Start difference. First operand 3431 states and 13275 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:50,425 INFO L93 Difference]: Finished difference Result 3830 states and 14517 transitions. [2021-06-05 15:15:50,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:15:50,425 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:50,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:50,432 INFO L225 Difference]: With dead ends: 3830 [2021-06-05 15:15:50,433 INFO L226 Difference]: Without dead ends: 3819 [2021-06-05 15:15:50,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 906.9ms TimeCoverageRelationStatistics Valid=281, Invalid=1359, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:15:50,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3819 states. [2021-06-05 15:15:50,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3819 to 3430. [2021-06-05 15:15:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8708078156897057) internal successors, (13273), 3429 states have internal predecessors, (13273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:50,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-05 15:15:50,502 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-05 15:15:50,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:50,502 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-05 15:15:50,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:50,502 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-05 15:15:50,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:50,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:50,507 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:50,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-06-05 15:15:50,708 INFO L430 AbstractCegarLoop]: === Iteration 380 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:50,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:50,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1373271240, now seen corresponding path program 243 times [2021-06-05 15:15:50,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:50,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167663136] [2021-06-05 15:15:50,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:50,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:50,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167663136] [2021-06-05 15:15:50,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167663136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:50,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528684268] [2021-06-05 15:15:50,894 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 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:50,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:15:50,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:50,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:15:50,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:51,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:51,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:15:51,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:15:51,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:51,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:51,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:51,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:15:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:51,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528684268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:51,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:51,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:15:51,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159480720] [2021-06-05 15:15:51,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:15:51,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:51,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:15:51,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:15:51,167 INFO L87 Difference]: Start difference. First operand 3430 states and 13273 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:55,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:55,358 INFO L93 Difference]: Finished difference Result 5894 states and 21603 transitions. [2021-06-05 15:15:55,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 15:15:55,358 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:55,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:55,369 INFO L225 Difference]: With dead ends: 5894 [2021-06-05 15:15:55,369 INFO L226 Difference]: Without dead ends: 5874 [2021-06-05 15:15:55,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2910 ImplicationChecksByTransitivity, 3429.8ms TimeCoverageRelationStatistics Valid=1122, Invalid=7434, Unknown=0, NotChecked=0, Total=8556 [2021-06-05 15:15:55,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5874 states. [2021-06-05 15:15:55,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5874 to 3430. [2021-06-05 15:15:55,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8708078156897057) internal successors, (13273), 3429 states have internal predecessors, (13273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:55,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-05 15:15:55,437 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-05 15:15:55,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:55,437 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-05 15:15:55,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:55,437 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-05 15:15:55,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:55,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:55,443 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:55,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:55,643 INFO L430 AbstractCegarLoop]: === Iteration 381 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:55,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:55,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1080747266, now seen corresponding path program 244 times [2021-06-05 15:15:55,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:55,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271833736] [2021-06-05 15:15:55,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:55,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:55,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271833736] [2021-06-05 15:15:55,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271833736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:55,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691557575] [2021-06-05 15:15:55,855 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 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:55,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:55,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:55,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:55,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:56,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:15:56,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:56,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:56,037 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:56,037 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:5 [2021-06-05 15:15:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:56,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691557575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:56,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:56,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:15:56,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514307052] [2021-06-05 15:15:56,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:15:56,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:56,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:15:56,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:15:56,068 INFO L87 Difference]: Start difference. First operand 3430 states and 13273 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:59,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:59,342 INFO L93 Difference]: Finished difference Result 4990 states and 18316 transitions. [2021-06-05 15:15:59,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 15:15:59,343 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:15:59,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:59,351 INFO L225 Difference]: With dead ends: 4990 [2021-06-05 15:15:59,351 INFO L226 Difference]: Without dead ends: 4962 [2021-06-05 15:15:59,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 2507.6ms TimeCoverageRelationStatistics Valid=878, Invalid=5602, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 15:15:59,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2021-06-05 15:15:59,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 3435. [2021-06-05 15:15:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 3.8698311007571347) internal successors, (13289), 3434 states have internal predecessors, (13289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 13289 transitions. [2021-06-05 15:15:59,406 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 13289 transitions. Word has length 24 [2021-06-05 15:15:59,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:59,407 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 13289 transitions. [2021-06-05 15:15:59,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:59,407 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 13289 transitions. [2021-06-05 15:15:59,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:15:59,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:59,412 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:59,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable736,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:59,612 INFO L430 AbstractCegarLoop]: === Iteration 382 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:15:59,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:59,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1071844342, now seen corresponding path program 245 times [2021-06-05 15:15:59,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:59,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190239277] [2021-06-05 15:15:59,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:59,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:59,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190239277] [2021-06-05 15:15:59,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190239277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:59,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599230415] [2021-06-05 15:15:59,812 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 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:59,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:15:59,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:59,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:59,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:59,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:15:59,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:59,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:59,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:59,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:16:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:00,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599230415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:00,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:00,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:16:00,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97483239] [2021-06-05 15:16:00,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:16:00,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:00,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:16:00,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:16:00,020 INFO L87 Difference]: Start difference. First operand 3435 states and 13289 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:02,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:02,727 INFO L93 Difference]: Finished difference Result 4925 states and 18087 transitions. [2021-06-05 15:16:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:16:02,727 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:16:02,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:02,735 INFO L225 Difference]: With dead ends: 4925 [2021-06-05 15:16:02,735 INFO L226 Difference]: Without dead ends: 4886 [2021-06-05 15:16:02,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 2020.8ms TimeCoverageRelationStatistics Valid=607, Invalid=3683, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:16:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4886 states. [2021-06-05 15:16:02,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4886 to 3438. [2021-06-05 15:16:02,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3438 states, 3437 states have (on average 3.8687809135874307) internal successors, (13297), 3437 states have internal predecessors, (13297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:02,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3438 states to 3438 states and 13297 transitions. [2021-06-05 15:16:02,782 INFO L78 Accepts]: Start accepts. Automaton has 3438 states and 13297 transitions. Word has length 24 [2021-06-05 15:16:02,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:02,782 INFO L482 AbstractCegarLoop]: Abstraction has 3438 states and 13297 transitions. [2021-06-05 15:16:02,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:02,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3438 states and 13297 transitions. [2021-06-05 15:16:02,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:16:02,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:02,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:02,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable737 [2021-06-05 15:16:02,989 INFO L430 AbstractCegarLoop]: === Iteration 383 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:16:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:02,989 INFO L82 PathProgramCache]: Analyzing trace with hash 864399170, now seen corresponding path program 246 times [2021-06-05 15:16:02,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:02,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795095832] [2021-06-05 15:16:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:03,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:03,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795095832] [2021-06-05 15:16:03,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795095832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:03,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218182153] [2021-06-05 15:16:03,178 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 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:03,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:16:03,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:03,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:16:03,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:03,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:03,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:03,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:03,422 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:03,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 15:16:03,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:16:03,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:03,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:03,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:18 [2021-06-05 15:16:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:03,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218182153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:03,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:03,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:16:03,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511142339] [2021-06-05 15:16:03,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:16:03,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:03,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:16:03,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:16:03,506 INFO L87 Difference]: Start difference. First operand 3438 states and 13297 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:05,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:05,782 INFO L93 Difference]: Finished difference Result 4581 states and 17132 transitions. [2021-06-05 15:16:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:16:05,783 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:16:05,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:05,790 INFO L225 Difference]: With dead ends: 4581 [2021-06-05 15:16:05,790 INFO L226 Difference]: Without dead ends: 4562 [2021-06-05 15:16:05,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 1936.4ms TimeCoverageRelationStatistics Valid=567, Invalid=2973, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 15:16:05,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4562 states. [2021-06-05 15:16:05,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4562 to 3434. [2021-06-05 15:16:05,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3434 states, 3433 states have (on average 3.870958345470434) internal successors, (13289), 3433 states have internal predecessors, (13289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3434 states to 3434 states and 13289 transitions. [2021-06-05 15:16:05,837 INFO L78 Accepts]: Start accepts. Automaton has 3434 states and 13289 transitions. Word has length 24 [2021-06-05 15:16:05,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:05,837 INFO L482 AbstractCegarLoop]: Abstraction has 3434 states and 13289 transitions. [2021-06-05 15:16:05,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3434 states and 13289 transitions. [2021-06-05 15:16:05,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:16:05,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:05,842 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:06,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable738,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:06,043 INFO L430 AbstractCegarLoop]: === Iteration 384 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:16:06,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:06,046 INFO L82 PathProgramCache]: Analyzing trace with hash 687857738, now seen corresponding path program 247 times [2021-06-05 15:16:06,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:06,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278243409] [2021-06-05 15:16:06,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:06,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:06,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278243409] [2021-06-05 15:16:06,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278243409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:06,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659315840] [2021-06-05 15:16:06,229 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 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:06,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:06,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:16:06,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:06,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:16:06,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:06,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:06,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:06,377 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:16:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:06,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659315840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:06,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:06,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:16:06,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645905484] [2021-06-05 15:16:06,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:16:06,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:06,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:16:06,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:16:06,425 INFO L87 Difference]: Start difference. First operand 3434 states and 13289 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:07,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:07,580 INFO L93 Difference]: Finished difference Result 4592 states and 17139 transitions. [2021-06-05 15:16:07,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:16:07,581 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:16:07,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:07,589 INFO L225 Difference]: With dead ends: 4592 [2021-06-05 15:16:07,589 INFO L226 Difference]: Without dead ends: 4583 [2021-06-05 15:16:07,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 890.3ms TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:16:07,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2021-06-05 15:16:07,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 3439. [2021-06-05 15:16:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3439 states, 3438 states have (on average 3.8694008144269922) internal successors, (13303), 3438 states have internal predecessors, (13303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:07,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3439 states to 3439 states and 13303 transitions. [2021-06-05 15:16:07,657 INFO L78 Accepts]: Start accepts. Automaton has 3439 states and 13303 transitions. Word has length 24 [2021-06-05 15:16:07,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:07,657 INFO L482 AbstractCegarLoop]: Abstraction has 3439 states and 13303 transitions. [2021-06-05 15:16:07,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:07,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3439 states and 13303 transitions. [2021-06-05 15:16:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:16:07,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:07,661 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:07,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable742 [2021-06-05 15:16:07,862 INFO L430 AbstractCegarLoop]: === Iteration 385 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:16:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:07,863 INFO L82 PathProgramCache]: Analyzing trace with hash -145880702, now seen corresponding path program 248 times [2021-06-05 15:16:07,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:07,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183500052] [2021-06-05 15:16:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:08,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:08,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183500052] [2021-06-05 15:16:08,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183500052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:08,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750871060] [2021-06-05 15:16:08,051 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 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:08,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:08,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:08,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:16:08,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:08,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:08,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:16:08,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:08,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:08,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:08,216 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:16:08,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:08,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750871060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:08,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:08,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:16:08,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805326801] [2021-06-05 15:16:08,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:16:08,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:08,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:16:08,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:16:08,335 INFO L87 Difference]: Start difference. First operand 3439 states and 13303 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:10,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:10,727 INFO L93 Difference]: Finished difference Result 4712 states and 17417 transitions. [2021-06-05 15:16:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 15:16:10,728 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:16:10,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:10,735 INFO L225 Difference]: With dead ends: 4712 [2021-06-05 15:16:10,735 INFO L226 Difference]: Without dead ends: 4702 [2021-06-05 15:16:10,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 2099.7ms TimeCoverageRelationStatistics Valid=636, Invalid=3270, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 15:16:10,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4702 states. [2021-06-05 15:16:10,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4702 to 3436. [2021-06-05 15:16:10,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3436 states, 3435 states have (on average 3.871033478893741) internal successors, (13297), 3435 states have internal predecessors, (13297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:10,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 13297 transitions. [2021-06-05 15:16:10,785 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 13297 transitions. Word has length 24 [2021-06-05 15:16:10,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:10,785 INFO L482 AbstractCegarLoop]: Abstraction has 3436 states and 13297 transitions. [2021-06-05 15:16:10,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:10,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 13297 transitions. [2021-06-05 15:16:10,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:16:10,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:10,790 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:10,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable743 [2021-06-05 15:16:10,990 INFO L430 AbstractCegarLoop]: === Iteration 386 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:16:10,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:10,990 INFO L82 PathProgramCache]: Analyzing trace with hash 635953098, now seen corresponding path program 249 times [2021-06-05 15:16:10,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:10,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896870361] [2021-06-05 15:16:10,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:10,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:11,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:11,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:11,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896870361] [2021-06-05 15:16:11,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896870361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:11,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712305301] [2021-06-05 15:16:11,162 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 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:11,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:16:11,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:11,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:16:11,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:11,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:11,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:11,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:16:11,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:11,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:11,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:11,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:7 [2021-06-05 15:16:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:11,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712305301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:11,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:11,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-05 15:16:11,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884623028] [2021-06-05 15:16:11,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:16:11,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:11,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:16:11,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:16:11,403 INFO L87 Difference]: Start difference. First operand 3436 states and 13297 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:12,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:12,999 INFO L93 Difference]: Finished difference Result 4517 states and 16899 transitions. [2021-06-05 15:16:12,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:16:12,999 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:16:12,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:13,006 INFO L225 Difference]: With dead ends: 4517 [2021-06-05 15:16:13,006 INFO L226 Difference]: Without dead ends: 4507 [2021-06-05 15:16:13,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1305.5ms TimeCoverageRelationStatistics Valid=390, Invalid=2160, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:16:13,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4507 states. [2021-06-05 15:16:13,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4507 to 3430. [2021-06-05 15:16:13,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8708078156897057) internal successors, (13273), 3429 states have internal predecessors, (13273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-05 15:16:13,073 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-05 15:16:13,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:13,073 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-05 15:16:13,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:13,074 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-05 15:16:13,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:16:13,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:13,079 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:13,279 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable746,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:13,279 INFO L430 AbstractCegarLoop]: === Iteration 387 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:16:13,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:13,280 INFO L82 PathProgramCache]: Analyzing trace with hash -305635602, now seen corresponding path program 21 times [2021-06-05 15:16:13,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:13,280 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804334968] [2021-06-05 15:16:13,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:13,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:13,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804334968] [2021-06-05 15:16:13,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804334968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:13,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609831202] [2021-06-05 15:16:13,466 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 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:13,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:16:13,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:13,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:16:13,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:13,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:13,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:16:13,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:16:13,701 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:13,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:13,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:13,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:5 [2021-06-05 15:16:13,736 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:13,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609831202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:13,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:13,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2021-06-05 15:16:13,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487895763] [2021-06-05 15:16:13,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 15:16:13,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:13,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 15:16:13,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:16:13,737 INFO L87 Difference]: Start difference. First operand 3430 states and 13273 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:17,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:17,585 INFO L93 Difference]: Finished difference Result 5710 states and 20952 transitions. [2021-06-05 15:16:17,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-06-05 15:16:17,586 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:16:17,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:17,595 INFO L225 Difference]: With dead ends: 5710 [2021-06-05 15:16:17,595 INFO L226 Difference]: Without dead ends: 5688 [2021-06-05 15:16:17,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2936 ImplicationChecksByTransitivity, 3302.1ms TimeCoverageRelationStatistics Valid=1127, Invalid=7615, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 15:16:17,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5688 states. [2021-06-05 15:16:17,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5688 to 3430. [2021-06-05 15:16:17,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3429 states have (on average 3.8708078156897057) internal successors, (13273), 3429 states have internal predecessors, (13273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:17,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 13273 transitions. [2021-06-05 15:16:17,653 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 13273 transitions. Word has length 24 [2021-06-05 15:16:17,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:17,653 INFO L482 AbstractCegarLoop]: Abstraction has 3430 states and 13273 transitions. [2021-06-05 15:16:17,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:17,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 13273 transitions. [2021-06-05 15:16:17,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:16:17,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:17,658 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:17,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable747 [2021-06-05 15:16:17,858 INFO L430 AbstractCegarLoop]: === Iteration 388 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:16:17,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:17,859 INFO L82 PathProgramCache]: Analyzing trace with hash -815151466, now seen corresponding path program 22 times [2021-06-05 15:16:17,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:17,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499428616] [2021-06-05 15:16:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:18,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:18,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499428616] [2021-06-05 15:16:18,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499428616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:18,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026389289] [2021-06-05 15:16:18,038 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 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:18,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:16:18,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:18,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:16:18,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:18,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:16:18,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:18,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:18,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:18,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:16:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:18,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026389289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:18,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:18,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:16:18,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919104469] [2021-06-05 15:16:18,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:16:18,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:18,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:16:18,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:16:18,255 INFO L87 Difference]: Start difference. First operand 3430 states and 13273 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:21,830 INFO L93 Difference]: Finished difference Result 4808 states and 17690 transitions. [2021-06-05 15:16:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-06-05 15:16:21,831 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:16:21,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:21,838 INFO L225 Difference]: With dead ends: 4808 [2021-06-05 15:16:21,838 INFO L226 Difference]: Without dead ends: 4779 [2021-06-05 15:16:21,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 2425.7ms TimeCoverageRelationStatistics Valid=878, Invalid=5602, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 15:16:21,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4779 states. [2021-06-05 15:16:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4779 to 3437. [2021-06-05 15:16:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3437 states, 3436 states have (on average 3.869906868451688) internal successors, (13297), 3436 states have internal predecessors, (13297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:21,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3437 states to 3437 states and 13297 transitions. [2021-06-05 15:16:21,888 INFO L78 Accepts]: Start accepts. Automaton has 3437 states and 13297 transitions. Word has length 24 [2021-06-05 15:16:21,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:21,888 INFO L482 AbstractCegarLoop]: Abstraction has 3437 states and 13297 transitions. [2021-06-05 15:16:21,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:21,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3437 states and 13297 transitions. [2021-06-05 15:16:21,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:16:21,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:21,893 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:22,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable748,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:22,093 INFO L430 AbstractCegarLoop]: === Iteration 389 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:16:22,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:22,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1024688846, now seen corresponding path program 23 times [2021-06-05 15:16:22,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:22,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098789091] [2021-06-05 15:16:22,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:22,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:22,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:22,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098789091] [2021-06-05 15:16:22,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098789091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:22,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239371697] [2021-06-05 15:16:22,293 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 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:22,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:16:22,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:22,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:16:22,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:22,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:16:22,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:22,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:22,468 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:22,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:7 [2021-06-05 15:16:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:22,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239371697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:22,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:22,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 23 [2021-06-05 15:16:22,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597355953] [2021-06-05 15:16:22,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:16:22,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:22,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:16:22,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:16:22,498 INFO L87 Difference]: Start difference. First operand 3437 states and 13297 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:25,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:25,114 INFO L93 Difference]: Finished difference Result 4743 states and 17460 transitions. [2021-06-05 15:16:25,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 15:16:25,114 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:16:25,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:25,122 INFO L225 Difference]: With dead ends: 4743 [2021-06-05 15:16:25,122 INFO L226 Difference]: Without dead ends: 4703 [2021-06-05 15:16:25,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 1961.8ms TimeCoverageRelationStatistics Valid=607, Invalid=3683, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 15:16:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4703 states. [2021-06-05 15:16:25,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4703 to 3440. [2021-06-05 15:16:25,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 3.869438790346031) internal successors, (13307), 3439 states have internal predecessors, (13307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:25,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 13307 transitions. [2021-06-05 15:16:25,178 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 13307 transitions. Word has length 24 [2021-06-05 15:16:25,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:25,178 INFO L482 AbstractCegarLoop]: Abstraction has 3440 states and 13307 transitions. [2021-06-05 15:16:25,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:25,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 13307 transitions. [2021-06-05 15:16:25,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:16:25,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:25,183 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:25,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable749,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:25,384 INFO L430 AbstractCegarLoop]: === Iteration 390 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:16:25,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:25,384 INFO L82 PathProgramCache]: Analyzing trace with hash 703982900, now seen corresponding path program 24 times [2021-06-05 15:16:25,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:25,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886651819] [2021-06-05 15:16:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:25,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:25,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:25,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886651819] [2021-06-05 15:16:25,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886651819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:25,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672929452] [2021-06-05 15:16:25,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:25,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:16:25,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:25,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:16:25,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:25,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:25,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:25,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:25,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:25,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-06-05 15:16:25,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:16:25,837 INFO L628 ElimStorePlain]: treesize reduction 27, result has 47.1 percent of original size [2021-06-05 15:16:25,840 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:25,840 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:18 [2021-06-05 15:16:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:25,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672929452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:25,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:25,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-06-05 15:16:25,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842465680] [2021-06-05 15:16:25,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 15:16:25,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:25,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 15:16:25,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:16:25,909 INFO L87 Difference]: Start difference. First operand 3440 states and 13307 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:27,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:27,679 INFO L93 Difference]: Finished difference Result 4481 states and 16783 transitions. [2021-06-05 15:16:27,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:16:27,680 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:16:27,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:27,689 INFO L225 Difference]: With dead ends: 4481 [2021-06-05 15:16:27,689 INFO L226 Difference]: Without dead ends: 4462 [2021-06-05 15:16:27,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1537.1ms TimeCoverageRelationStatistics Valid=403, Invalid=2353, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 15:16:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4462 states. [2021-06-05 15:16:27,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4462 to 3435. [2021-06-05 15:16:27,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 3.870995923121724) internal successors, (13293), 3434 states have internal predecessors, (13293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:27,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 13293 transitions. [2021-06-05 15:16:27,761 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 13293 transitions. Word has length 24 [2021-06-05 15:16:27,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:27,761 INFO L482 AbstractCegarLoop]: Abstraction has 3435 states and 13293 transitions. [2021-06-05 15:16:27,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:27,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 13293 transitions. [2021-06-05 15:16:27,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:16:27,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:27,767 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:27,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable750,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:27,989 INFO L430 AbstractCegarLoop]: === Iteration 391 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:16:27,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:27,989 INFO L82 PathProgramCache]: Analyzing trace with hash -324166960, now seen corresponding path program 25 times [2021-06-05 15:16:27,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:27,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126734052] [2021-06-05 15:16:27,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:28,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:28,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126734052] [2021-06-05 15:16:28,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126734052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:28,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635359394] [2021-06-05 15:16:28,202 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 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:28,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:16:28,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:28,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 15:16:28,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:28,392 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:28,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:28,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:7 [2021-06-05 15:16:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:28,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635359394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:28,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:28,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-06-05 15:16:28,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428617459] [2021-06-05 15:16:28,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:16:28,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:28,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:16:28,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:16:28,451 INFO L87 Difference]: Start difference. First operand 3435 states and 13293 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:29,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:29,695 INFO L93 Difference]: Finished difference Result 4403 states and 16490 transitions. [2021-06-05 15:16:29,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:16:29,696 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 15:16:29,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:29,703 INFO L225 Difference]: With dead ends: 4403 [2021-06-05 15:16:29,703 INFO L226 Difference]: Without dead ends: 4394 [2021-06-05 15:16:29,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 997.9ms TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:16:29,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4394 states. [2021-06-05 15:16:29,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4394 to 3444. [2021-06-05 15:16:29,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3444 states, 3443 states have (on average 3.869009584664537) internal successors, (13321), 3443 states have internal predecessors, (13321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3444 states to 3444 states and 13321 transitions. [2021-06-05 15:16:29,755 INFO L78 Accepts]: Start accepts. Automaton has 3444 states and 13321 transitions. Word has length 24 [2021-06-05 15:16:29,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:29,755 INFO L482 AbstractCegarLoop]: Abstraction has 3444 states and 13321 transitions. [2021-06-05 15:16:29,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:29,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3444 states and 13321 transitions. [2021-06-05 15:16:29,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 15:16:29,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:29,760 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:29,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable754,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:29,961 INFO L430 AbstractCegarLoop]: === Iteration 392 === [thread1Err3INUSE_VIOLATION, thread1Thread1of1ForFork0Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, thread1Thread1of1ForFork0Err1INUSE_VIOLATION, thread1Err5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr4INUSE_VIOLATION]=== [2021-06-05 15:16:29,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:29,961 INFO L82 PathProgramCache]: Analyzing trace with hash -580782, now seen corresponding path program 26 times [2021-06-05 15:16:29,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:29,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446163659] [2021-06-05 15:16:29,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:29,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:30,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:30,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446163659] [2021-06-05 15:16:30,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446163659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:30,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444831707] [2021-06-05 15:16:30,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:30,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:30,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:30,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:16:30,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:30,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:30,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:16:30,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:30,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:30,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:30,441 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:16:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:30,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444831707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:30,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:30,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-06-05 15:16:30,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480148048] [2021-06-05 15:16:30,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:16:30,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:30,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:16:30,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:16:30,573 INFO L87 Difference]: Start difference. First operand 3444 states and 13321 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 15:16:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:16:30,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable755 [2021-06-05 15:16:30,979 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 15:16:30,981 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:16:30,983 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 15:16:30,983 INFO L202 PluginConnector]: Adding new model parallel-sum-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:16:30 BasicIcfg [2021-06-05 15:16:30,983 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:16:30,983 INFO L168 Benchmark]: Toolchain (without parser) took 776783.88 ms. Allocated memory was 346.0 MB in the beginning and 1.1 GB in the end (delta: 721.4 MB). Free memory was 326.2 MB in the beginning and 939.5 MB in the end (delta: -613.3 MB). Peak memory consumption was 111.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:16:30,984 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 346.0 MB. Free memory was 327.4 MB in the beginning and 327.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:16:30,984 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.50 ms. Allocated memory is still 346.0 MB. Free memory was 326.1 MB in the beginning and 324.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:16:30,984 INFO L168 Benchmark]: Boogie Preprocessor took 18.36 ms. Allocated memory is still 346.0 MB. Free memory was 324.6 MB in the beginning and 323.6 MB in the end (delta: 997.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:16:30,984 INFO L168 Benchmark]: RCFGBuilder took 258.37 ms. Allocated memory is still 346.0 MB. Free memory was 323.6 MB in the beginning and 307.9 MB in the end (delta: 15.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. [2021-06-05 15:16:30,984 INFO L168 Benchmark]: TraceAbstraction took 776473.55 ms. Allocated memory was 346.0 MB in the beginning and 1.1 GB in the end (delta: 721.4 MB). Free memory was 307.4 MB in the beginning and 939.5 MB in the end (delta: -632.0 MB). Peak memory consumption was 92.2 MB. Max. memory is 16.0 GB. [2021-06-05 15:16:30,984 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 0.13 ms. Allocated memory is still 346.0 MB. Free memory was 327.4 MB in the beginning and 327.3 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.50 ms. Allocated memory is still 346.0 MB. Free memory was 326.1 MB in the beginning and 324.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.36 ms. Allocated memory is still 346.0 MB. Free memory was 324.6 MB in the beginning and 323.6 MB in the end (delta: 997.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 258.37 ms. Allocated memory is still 346.0 MB. Free memory was 323.6 MB in the beginning and 307.9 MB in the end (delta: 15.6 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 776473.55 ms. Allocated memory was 346.0 MB in the beginning and 1.1 GB in the end (delta: 721.4 MB). Free memory was 307.4 MB in the beginning and 939.5 MB in the end (delta: -632.0 MB). Peak memory consumption was 92.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3444states) and FLOYD_HOARE automaton (currently 10 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 26 known predicates. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3444states) and FLOYD_HOARE automaton (currently 10 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 26 known predicates. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3444states) and FLOYD_HOARE automaton (currently 10 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 26 known predicates. - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3444states) and FLOYD_HOARE automaton (currently 10 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 26 known predicates. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3444states) and FLOYD_HOARE automaton (currently 10 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 26 known predicates. - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (3444states) and FLOYD_HOARE automaton (currently 10 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 26 known predicates. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3444states) and FLOYD_HOARE automaton (currently 10 states, 23 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 26 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 49 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 776343.9ms, OverallIterations: 392, TraceHistogramMax: 2, EmptinessCheckTime: 1000.3ms, AutomataDifference: 533197.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26460 SDtfs, 75956 SDslu, 237872 SDs, 0 SdLazy, 349894 SolverSat, 42014 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 149712.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22920 GetRequests, 5724 SyntacticMatches, 427 SemanticMatches, 16768 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256802 ImplicationChecksByTransitivity, 445519.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3444occurred in iteration=391, InterpolantAutomatonStates: 14558, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 10898.9ms AutomataMinimizationTime, 391 MinimizatonAttempts, 242061 StatesRemovedByMinimization, 390 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1653.0ms SsaConstructionTime, 3933.1ms SatisfiabilityAnalysisTime, 140146.0ms InterpolantComputationTime, 17996 NumberOfCodeBlocks, 17996 NumberOfCodeBlocksAsserted, 1183 NumberOfCheckSat, 17224 ConstructedInterpolants, 430 QuantifiedInterpolants, 244872 SizeOfPredicates, 3038 NumberOfNonLiveVariables, 31122 ConjunctsInSsa, 11311 ConjunctsInUnsatCore, 772 InterpolantComputations, 12 PerfectInterpolantSequences, 164/4422 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