/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 21:01:51,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 21:01:51,415 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 21:01:51,443 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 21:01:51,495 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 21:01:51,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 21:01:51,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 21:01:51,496 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.epf [2021-05-21 21:01:51,521 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 21:01:51,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 21:01:51,521 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 21:01:51,521 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 21:01:51,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 21:01:51,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 21:01:51,523 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 21:01:51,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 21:01:51,524 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 21:01:51,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 21:01:51,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 21:01:51,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 21:01:51,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 21:01:51,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 21:01:51,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 21:01:51,525 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 21:01:51,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 21:01:51,525 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 21:01:51,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 21:01:51,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 21:01:51,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 21:01:51,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 21:01:51,525 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 21:01:51,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:01:51,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 21:01:51,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 21:01:51,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 21:01:51,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 21:01:51,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 21:01:51,526 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 21:01:51,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 21:01:51,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 21:01:51,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 21:01:51,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 21:01:51,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 21:01:51,759 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 21:01:51,760 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 21:01:51,761 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl [2021-05-21 21:01:51,761 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl' [2021-05-21 21:01:51,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 21:01:51,790 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 21:01:51,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 21:01:51,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 21:01:51,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 21:01:51,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:01:51" (1/1) ... [2021-05-21 21:01:51,803 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:01:51" (1/1) ... [2021-05-21 21:01:51,808 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 21:01:51,808 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 21:01:51,809 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 21:01:51,809 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 21:01:51,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:01:51" (1/1) ... [2021-05-21 21:01:51,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:01:51" (1/1) ... [2021-05-21 21:01:51,815 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:01:51" (1/1) ... [2021-05-21 21:01:51,815 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:01:51" (1/1) ... [2021-05-21 21:01:51,817 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:01:51" (1/1) ... [2021-05-21 21:01:51,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:01:51" (1/1) ... [2021-05-21 21:01:51,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:01:51" (1/1) ... [2021-05-21 21:01:51,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 21:01:51,820 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 21:01:51,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 21:01:51,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 21:01:51,821 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:01:51" (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 [2021-05-21 21:01:51,877 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 21:01:51,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 21:01:51,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 21:01:51,877 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 21:01:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 21:01:51,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 21:01:51,878 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 21:01:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 21:01:51,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 21:01:51,878 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 21:01:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 21:01:51,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 21:01:51,878 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-21 21:01:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-21 21:01:51,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-21 21:01:51,879 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 21:01:52,120 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 21:01:52,121 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 21:01:52,122 INFO L202 PluginConnector]: Adding new model difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:01:52 BoogieIcfgContainer [2021-05-21 21:01:52,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 21:01:52,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 21:01:52,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 21:01:52,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 21:01:52,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:01:51" (1/2) ... [2021-05-21 21:01:52,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f763b47 and model type difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:01:52, skipping insertion in model container [2021-05-21 21:01:52,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:01:52" (2/2) ... [2021-05-21 21:01:52,132 INFO L111 eAbstractionObserver]: Analyzing ICFG difference-det.wvr.bpl [2021-05-21 21:01:52,136 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 21:01:52,136 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 21:01:52,136 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 21:01:52,136 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 21:01:52,206 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-21 21:01:52,220 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-05-21 21:01:52,244 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:01:52,245 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:01:52,245 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:01:52,245 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:01:52,245 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:01:52,246 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:01:52,246 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:01:52,246 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 21:01:52,256 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 40 transitions, 112 flow [2021-05-21 21:01:52,293 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:52,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-21 21:01:52,312 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:01:52,313 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:01:52,313 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:01:52,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:01:52,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1838723412, now seen corresponding path program 1 times [2021-05-21 21:01:52,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:01:52,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847193206] [2021-05-21 21:01:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:01:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:01:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:01:52,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:01:52,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847193206] [2021-05-21 21:01:52,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847193206] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:01:52,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:01:52,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:01:52,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384116802] [2021-05-21 21:01:52,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-21 21:01:52,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:01:52,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-21 21:01:52,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-21 21:01:52,502 INFO L87 Difference]: Start difference. First operand has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 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 6.5) internal successors, (26), 4 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) [2021-05-21 21:01:52,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:01:52,584 INFO L93 Difference]: Finished difference Result 1268 states and 4623 transitions. [2021-05-21 21:01:52,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 21:01:52,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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 26 [2021-05-21 21:01:52,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:01:52,611 INFO L225 Difference]: With dead ends: 1268 [2021-05-21 21:01:52,611 INFO L226 Difference]: Without dead ends: 1057 [2021-05-21 21:01:52,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:01:52,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-05-21 21:01:52,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 776. [2021-05-21 21:01:52,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.7716129032258063) internal successors, (2923), 775 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:52,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2923 transitions. [2021-05-21 21:01:52,679 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2923 transitions. Word has length 26 [2021-05-21 21:01:52,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:01:52,680 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2923 transitions. [2021-05-21 21:01:52,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2021-05-21 21:01:52,680 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2923 transitions. [2021-05-21 21:01:52,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 21:01:52,682 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:01:52,682 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:01:52,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 21:01:52,683 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:01:52,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:01:52,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1812651438, now seen corresponding path program 1 times [2021-05-21 21:01:52,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:01:52,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015265677] [2021-05-21 21:01:52,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:01:52,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:01:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:01:52,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:01:52,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015265677] [2021-05-21 21:01:52,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015265677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:01:52,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832451158] [2021-05-21 21:01:52,732 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 [2021-05-21 21:01:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:01:52,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 21:01:52,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:01:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:01:53,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832451158] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:01:53,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:01:53,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-05-21 21:01:53,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542588717] [2021-05-21 21:01:53,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:01:53,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:01:53,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:01:53,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:01:53,009 INFO L87 Difference]: Start difference. First operand 776 states and 2923 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:53,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:01:53,113 INFO L93 Difference]: Finished difference Result 1233 states and 4561 transitions. [2021-05-21 21:01:53,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:01:53,114 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 21:01:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:01:53,119 INFO L225 Difference]: With dead ends: 1233 [2021-05-21 21:01:53,119 INFO L226 Difference]: Without dead ends: 1233 [2021-05-21 21:01:53,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:01:53,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-05-21 21:01:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 868. [2021-05-21 21:01:53,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.795847750865052) internal successors, (3291), 867 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3291 transitions. [2021-05-21 21:01:53,157 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3291 transitions. Word has length 28 [2021-05-21 21:01:53,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:01:53,158 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3291 transitions. [2021-05-21 21:01:53,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3291 transitions. [2021-05-21 21:01:53,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 21:01:53,160 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:01:53,160 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:01:53,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-21 21:01:53,384 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:01:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:01:53,385 INFO L82 PathProgramCache]: Analyzing trace with hash 56282868, now seen corresponding path program 1 times [2021-05-21 21:01:53,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:01:53,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43951908] [2021-05-21 21:01:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:01:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:01:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:01:53,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:01:53,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43951908] [2021-05-21 21:01:53,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43951908] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:01:53,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:01:53,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 21:01:53,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850475720] [2021-05-21 21:01:53,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:01:53,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:01:53,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:01:53,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:01:53,420 INFO L87 Difference]: Start difference. First operand 868 states and 3291 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2021-05-21 21:01:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:01:53,483 INFO L93 Difference]: Finished difference Result 1101 states and 3979 transitions. [2021-05-21 21:01:53,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:01:53,484 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 28 [2021-05-21 21:01:53,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:01:53,489 INFO L225 Difference]: With dead ends: 1101 [2021-05-21 21:01:53,489 INFO L226 Difference]: Without dead ends: 1047 [2021-05-21 21:01:53,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:01:53,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-05-21 21:01:53,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 912. [2021-05-21 21:01:53,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 3.773874862788145) internal successors, (3438), 911 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:53,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 3438 transitions. [2021-05-21 21:01:53,512 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 3438 transitions. Word has length 28 [2021-05-21 21:01:53,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:01:53,512 INFO L482 AbstractCegarLoop]: Abstraction has 912 states and 3438 transitions. [2021-05-21 21:01:53,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2021-05-21 21:01:53,513 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 3438 transitions. [2021-05-21 21:01:53,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 21:01:53,515 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:01:53,515 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:01:53,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 21:01:53,515 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:01:53,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:01:53,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1752946356, now seen corresponding path program 2 times [2021-05-21 21:01:53,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:01:53,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254990551] [2021-05-21 21:01:53,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:01:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:01:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:01:53,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:01:53,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254990551] [2021-05-21 21:01:53,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254990551] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:01:53,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:01:53,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 21:01:53,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107204870] [2021-05-21 21:01:53,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:01:53,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:01:53,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:01:53,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:01:53,562 INFO L87 Difference]: Start difference. First operand 912 states and 3438 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2021-05-21 21:01:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:01:53,609 INFO L93 Difference]: Finished difference Result 834 states and 3134 transitions. [2021-05-21 21:01:53,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:01:53,610 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 28 [2021-05-21 21:01:53,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:01:53,614 INFO L225 Difference]: With dead ends: 834 [2021-05-21 21:01:53,614 INFO L226 Difference]: Without dead ends: 834 [2021-05-21 21:01:53,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:01:53,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-05-21 21:01:53,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 774. [2021-05-21 21:01:53,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.8007761966364813) internal successors, (2938), 773 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:53,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2938 transitions. [2021-05-21 21:01:53,633 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2938 transitions. Word has length 28 [2021-05-21 21:01:53,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:01:53,633 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2938 transitions. [2021-05-21 21:01:53,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2021-05-21 21:01:53,633 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2938 transitions. [2021-05-21 21:01:53,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 21:01:53,635 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:01:53,635 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:01:53,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 21:01:53,635 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:01:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:01:53,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1894118288, now seen corresponding path program 2 times [2021-05-21 21:01:53,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:01:53,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591835581] [2021-05-21 21:01:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:01:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:01:53,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:01:53,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:01:53,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591835581] [2021-05-21 21:01:53,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591835581] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:01:53,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:01:53,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 21:01:53,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785261896] [2021-05-21 21:01:53,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:01:53,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:01:53,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:01:53,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:01:53,690 INFO L87 Difference]: Start difference. First operand 774 states and 2938 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2021-05-21 21:01:53,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:01:53,748 INFO L93 Difference]: Finished difference Result 878 states and 3300 transitions. [2021-05-21 21:01:53,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:01:53,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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 28 [2021-05-21 21:01:53,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:01:53,752 INFO L225 Difference]: With dead ends: 878 [2021-05-21 21:01:53,752 INFO L226 Difference]: Without dead ends: 838 [2021-05-21 21:01:53,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 35.0ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:01:53,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-05-21 21:01:53,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 726. [2021-05-21 21:01:53,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.8096551724137933) internal successors, (2762), 725 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:53,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2762 transitions. [2021-05-21 21:01:53,770 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2762 transitions. Word has length 28 [2021-05-21 21:01:53,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:01:53,771 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2762 transitions. [2021-05-21 21:01:53,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 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) [2021-05-21 21:01:53,771 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2762 transitions. [2021-05-21 21:01:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 21:01:53,772 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:01:53,773 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:01:53,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 21:01:53,773 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:01:53,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:01:53,773 INFO L82 PathProgramCache]: Analyzing trace with hash 73332850, now seen corresponding path program 1 times [2021-05-21 21:01:53,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:01:53,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689844778] [2021-05-21 21:01:53,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:01:53,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:01:53,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:01:53,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:01:53,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689844778] [2021-05-21 21:01:53,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689844778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:01:53,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785462828] [2021-05-21 21:01:53,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:01:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:01:53,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:01:53,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:01:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:01:54,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785462828] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:01:54,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:01:54,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-05-21 21:01:54,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478970282] [2021-05-21 21:01:54,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 21:01:54,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:01:54,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 21:01:54,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:01:54,020 INFO L87 Difference]: Start difference. First operand 726 states and 2762 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:54,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:01:54,083 INFO L93 Difference]: Finished difference Result 3314 states and 12458 transitions. [2021-05-21 21:01:54,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:01:54,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-05-21 21:01:54,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:01:54,098 INFO L225 Difference]: With dead ends: 3314 [2021-05-21 21:01:54,098 INFO L226 Difference]: Without dead ends: 3000 [2021-05-21 21:01:54,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:01:54,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-05-21 21:01:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2163. [2021-05-21 21:01:54,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.01063829787234) internal successors, (8671), 2162 states have internal predecessors, (8671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:54,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 8671 transitions. [2021-05-21 21:01:54,160 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 8671 transitions. Word has length 30 [2021-05-21 21:01:54,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:01:54,160 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 8671 transitions. [2021-05-21 21:01:54,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:54,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 8671 transitions. [2021-05-21 21:01:54,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-21 21:01:54,165 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:01:54,166 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:01:54,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:01:54,379 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:01:54,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:01:54,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2051184466, now seen corresponding path program 2 times [2021-05-21 21:01:54,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:01:54,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625316118] [2021-05-21 21:01:54,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:01:54,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:01:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:01:54,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:01:54,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625316118] [2021-05-21 21:01:54,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625316118] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:01:54,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:01:54,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-21 21:01:54,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653809060] [2021-05-21 21:01:54,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:01:54,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:01:54,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:01:54,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:01:54,447 INFO L87 Difference]: Start difference. First operand 2163 states and 8671 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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) [2021-05-21 21:01:54,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:01:54,502 INFO L93 Difference]: Finished difference Result 3426 states and 13470 transitions. [2021-05-21 21:01:54,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:01:54,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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 30 [2021-05-21 21:01:54,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:01:54,518 INFO L225 Difference]: With dead ends: 3426 [2021-05-21 21:01:54,519 INFO L226 Difference]: Without dead ends: 3395 [2021-05-21 21:01:54,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-21 21:01:54,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-05-21 21:01:54,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 2948. [2021-05-21 21:01:54,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 4.058025110281642) internal successors, (11959), 2947 states have internal predecessors, (11959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:54,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 11959 transitions. [2021-05-21 21:01:54,589 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 11959 transitions. Word has length 30 [2021-05-21 21:01:54,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:01:54,589 INFO L482 AbstractCegarLoop]: Abstraction has 2948 states and 11959 transitions. [2021-05-21 21:01:54,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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) [2021-05-21 21:01:54,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 11959 transitions. [2021-05-21 21:01:54,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:01:54,596 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:01:54,596 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:01:54,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 21:01:54,596 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:01:54,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:01:54,596 INFO L82 PathProgramCache]: Analyzing trace with hash -721503632, now seen corresponding path program 3 times [2021-05-21 21:01:54,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:01:54,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483553701] [2021-05-21 21:01:54,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:01:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:01:54,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:01:54,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:01:54,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483553701] [2021-05-21 21:01:54,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483553701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:01:54,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468285286] [2021-05-21 21:01:54,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:01:54,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:01:54,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:01:54,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:01:54,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:01:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:01:54,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468285286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:01:54,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:01:54,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-21 21:01:54,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156138197] [2021-05-21 21:01:54,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:01:54,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:01:54,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:01:54,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:01:54,804 INFO L87 Difference]: Start difference. First operand 2948 states and 11959 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:55,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:01:55,122 INFO L93 Difference]: Finished difference Result 10235 states and 40121 transitions. [2021-05-21 21:01:55,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:01:55,122 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 21:01:55,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:01:55,169 INFO L225 Difference]: With dead ends: 10235 [2021-05-21 21:01:55,169 INFO L226 Difference]: Without dead ends: 10235 [2021-05-21 21:01:55,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 242.2ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:01:55,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10235 states. [2021-05-21 21:01:55,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10235 to 4372. [2021-05-21 21:01:55,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 4371 states have (on average 4.153511782200869) internal successors, (18155), 4371 states have internal predecessors, (18155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 18155 transitions. [2021-05-21 21:01:55,328 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 18155 transitions. Word has length 32 [2021-05-21 21:01:55,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:01:55,330 INFO L482 AbstractCegarLoop]: Abstraction has 4372 states and 18155 transitions. [2021-05-21 21:01:55,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 18155 transitions. [2021-05-21 21:01:55,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:01:55,340 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:01:55,340 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:01:55,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:01:55,558 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:01:55,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:01:55,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1838023666, now seen corresponding path program 1 times [2021-05-21 21:01:55,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:01:55,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82639692] [2021-05-21 21:01:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:01:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:01:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:01:55,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:01:55,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82639692] [2021-05-21 21:01:55,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82639692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:01:55,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213874282] [2021-05-21 21:01:55,589 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 [2021-05-21 21:01:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:01:55,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-21 21:01:55,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:01:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:01:55,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213874282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:01:55,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:01:55,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-05-21 21:01:55,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183116653] [2021-05-21 21:01:55,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 21:01:55,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:01:55,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 21:01:55,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:01:55,703 INFO L87 Difference]: Start difference. First operand 4372 states and 18155 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:55,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:01:55,811 INFO L93 Difference]: Finished difference Result 8631 states and 35204 transitions. [2021-05-21 21:01:55,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-21 21:01:55,812 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 21:01:55,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:01:55,836 INFO L225 Difference]: With dead ends: 8631 [2021-05-21 21:01:55,836 INFO L226 Difference]: Without dead ends: 8631 [2021-05-21 21:01:55,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:01:55,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8631 states. [2021-05-21 21:01:55,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8631 to 5549. [2021-05-21 21:01:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 4.195385724585436) internal successors, (23276), 5548 states have internal predecessors, (23276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:55,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 23276 transitions. [2021-05-21 21:01:55,996 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 23276 transitions. Word has length 32 [2021-05-21 21:01:55,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:01:55,996 INFO L482 AbstractCegarLoop]: Abstraction has 5549 states and 23276 transitions. [2021-05-21 21:01:55,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:55,996 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 23276 transitions. [2021-05-21 21:01:56,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:01:56,008 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:01:56,008 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:01:56,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:01:56,224 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:01:56,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:01:56,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1572403148, now seen corresponding path program 4 times [2021-05-21 21:01:56,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:01:56,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743087375] [2021-05-21 21:01:56,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:01:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:01:56,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:01:56,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:01:56,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743087375] [2021-05-21 21:01:56,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743087375] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:01:56,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096607180] [2021-05-21 21:01:56,281 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 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 [2021-05-21 21:01:56,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:01:56,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:01:56,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:01:56,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:01:56,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:01:56,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096607180] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:01:56,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:01:56,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 21:01:56,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140194299] [2021-05-21 21:01:56,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:01:56,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:01:56,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:01:56,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:01:56,466 INFO L87 Difference]: Start difference. First operand 5549 states and 23276 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:56,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:01:56,787 INFO L93 Difference]: Finished difference Result 15361 states and 62588 transitions. [2021-05-21 21:01:56,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:01:56,787 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 21:01:56,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:01:56,849 INFO L225 Difference]: With dead ends: 15361 [2021-05-21 21:01:56,850 INFO L226 Difference]: Without dead ends: 15091 [2021-05-21 21:01:56,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-05-21 21:01:56,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2021-05-21 21:01:57,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 8451. [2021-05-21 21:01:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8451 states, 8450 states have (on average 4.295739644970414) internal successors, (36299), 8450 states have internal predecessors, (36299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:57,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8451 states to 8451 states and 36299 transitions. [2021-05-21 21:01:57,089 INFO L78 Accepts]: Start accepts. Automaton has 8451 states and 36299 transitions. Word has length 32 [2021-05-21 21:01:57,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:01:57,089 INFO L482 AbstractCegarLoop]: Abstraction has 8451 states and 36299 transitions. [2021-05-21 21:01:57,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:57,090 INFO L276 IsEmpty]: Start isEmpty. Operand 8451 states and 36299 transitions. [2021-05-21 21:01:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:01:57,109 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:01:57,109 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:01:57,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-21 21:01:57,327 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:01:57,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:01:57,327 INFO L82 PathProgramCache]: Analyzing trace with hash 825554672, now seen corresponding path program 1 times [2021-05-21 21:01:57,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:01:57,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037587377] [2021-05-21 21:01:57,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:01:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:01:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:01:57,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:01:57,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037587377] [2021-05-21 21:01:57,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037587377] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:01:57,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:01:57,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 21:01:57,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740203037] [2021-05-21 21:01:57,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:01:57,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:01:57,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:01:57,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:01:57,358 INFO L87 Difference]: Start difference. First operand 8451 states and 36299 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-05-21 21:01:57,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:01:57,453 INFO L93 Difference]: Finished difference Result 11634 states and 49174 transitions. [2021-05-21 21:01:57,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:01:57,454 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 32 [2021-05-21 21:01:57,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:01:57,551 INFO L225 Difference]: With dead ends: 11634 [2021-05-21 21:01:57,551 INFO L226 Difference]: Without dead ends: 11496 [2021-05-21 21:01:57,551 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:01:57,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11496 states. [2021-05-21 21:01:57,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11496 to 9206. [2021-05-21 21:01:57,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9206 states, 9205 states have (on average 4.329277566539924) internal successors, (39851), 9205 states have internal predecessors, (39851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9206 states to 9206 states and 39851 transitions. [2021-05-21 21:01:57,880 INFO L78 Accepts]: Start accepts. Automaton has 9206 states and 39851 transitions. Word has length 32 [2021-05-21 21:01:57,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:01:57,880 INFO L482 AbstractCegarLoop]: Abstraction has 9206 states and 39851 transitions. [2021-05-21 21:01:57,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-05-21 21:01:57,880 INFO L276 IsEmpty]: Start isEmpty. Operand 9206 states and 39851 transitions. [2021-05-21 21:01:57,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:01:57,901 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:01:57,901 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:01:57,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-21 21:01:57,901 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:01:57,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:01:57,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1089339216, now seen corresponding path program 2 times [2021-05-21 21:01:57,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:01:57,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161374611] [2021-05-21 21:01:57,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:01:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:01:57,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:01:57,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:01:57,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161374611] [2021-05-21 21:01:57,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161374611] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:01:57,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:01:57,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 21:01:57,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358382010] [2021-05-21 21:01:57,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:01:57,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:01:57,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:01:57,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:01:57,937 INFO L87 Difference]: Start difference. First operand 9206 states and 39851 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-05-21 21:01:58,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:01:58,014 INFO L93 Difference]: Finished difference Result 10977 states and 46247 transitions. [2021-05-21 21:01:58,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:01:58,014 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 32 [2021-05-21 21:01:58,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:01:58,041 INFO L225 Difference]: With dead ends: 10977 [2021-05-21 21:01:58,041 INFO L226 Difference]: Without dead ends: 10950 [2021-05-21 21:01:58,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-21 21:01:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-05-21 21:01:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 9177. [2021-05-21 21:01:58,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9177 states, 9176 states have (on average 4.283129904097646) internal successors, (39302), 9176 states have internal predecessors, (39302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9177 states to 9177 states and 39302 transitions. [2021-05-21 21:01:58,293 INFO L78 Accepts]: Start accepts. Automaton has 9177 states and 39302 transitions. Word has length 32 [2021-05-21 21:01:58,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:01:58,293 INFO L482 AbstractCegarLoop]: Abstraction has 9177 states and 39302 transitions. [2021-05-21 21:01:58,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-05-21 21:01:58,293 INFO L276 IsEmpty]: Start isEmpty. Operand 9177 states and 39302 transitions. [2021-05-21 21:01:58,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:01:58,374 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:01:58,374 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:01:58,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-21 21:01:58,374 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:01:58,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:01:58,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1444113172, now seen corresponding path program 2 times [2021-05-21 21:01:58,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:01:58,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872479448] [2021-05-21 21:01:58,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:01:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:01:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:01:58,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:01:58,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872479448] [2021-05-21 21:01:58,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872479448] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:01:58,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:01:58,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 21:01:58,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500397125] [2021-05-21 21:01:58,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:01:58,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:01:58,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:01:58,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:01:58,413 INFO L87 Difference]: Start difference. First operand 9177 states and 39302 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-05-21 21:01:58,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:01:58,562 INFO L93 Difference]: Finished difference Result 11062 states and 46211 transitions. [2021-05-21 21:01:58,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 21:01:58,563 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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 32 [2021-05-21 21:01:58,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:01:58,589 INFO L225 Difference]: With dead ends: 11062 [2021-05-21 21:01:58,589 INFO L226 Difference]: Without dead ends: 11002 [2021-05-21 21:01:58,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-21 21:01:58,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11002 states. [2021-05-21 21:01:58,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11002 to 9261. [2021-05-21 21:01:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9261 states, 9260 states have (on average 4.27645788336933) internal successors, (39600), 9260 states have internal predecessors, (39600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9261 states to 9261 states and 39600 transitions. [2021-05-21 21:01:58,824 INFO L78 Accepts]: Start accepts. Automaton has 9261 states and 39600 transitions. Word has length 32 [2021-05-21 21:01:58,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:01:58,824 INFO L482 AbstractCegarLoop]: Abstraction has 9261 states and 39600 transitions. [2021-05-21 21:01:58,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 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) [2021-05-21 21:01:58,825 INFO L276 IsEmpty]: Start isEmpty. Operand 9261 states and 39600 transitions. [2021-05-21 21:01:58,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:01:58,842 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:01:58,842 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:01:58,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-21 21:01:58,843 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:01:58,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:01:58,843 INFO L82 PathProgramCache]: Analyzing trace with hash 464079412, now seen corresponding path program 5 times [2021-05-21 21:01:58,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:01:58,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140959624] [2021-05-21 21:01:58,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:01:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:01:58,881 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:01:58,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:01:58,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140959624] [2021-05-21 21:01:58,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140959624] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:01:58,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818586039] [2021-05-21 21:01:58,882 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 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 [2021-05-21 21:01:58,926 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:01:58,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:01:58,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:01:58,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:01:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:01:59,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818586039] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:01:59,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:01:59,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-21 21:01:59,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650122374] [2021-05-21 21:01:59,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:01:59,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:01:59,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:01:59,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:01:59,014 INFO L87 Difference]: Start difference. First operand 9261 states and 39600 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:59,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:01:59,368 INFO L93 Difference]: Finished difference Result 17289 states and 70842 transitions. [2021-05-21 21:01:59,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:01:59,368 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 21:01:59,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:01:59,407 INFO L225 Difference]: With dead ends: 17289 [2021-05-21 21:01:59,407 INFO L226 Difference]: Without dead ends: 17289 [2021-05-21 21:01:59,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:01:59,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17289 states. [2021-05-21 21:01:59,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17289 to 10772. [2021-05-21 21:01:59,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10772 states, 10771 states have (on average 4.3019218271284005) internal successors, (46336), 10771 states have internal predecessors, (46336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10772 states to 10772 states and 46336 transitions. [2021-05-21 21:01:59,737 INFO L78 Accepts]: Start accepts. Automaton has 10772 states and 46336 transitions. Word has length 32 [2021-05-21 21:01:59,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:01:59,737 INFO L482 AbstractCegarLoop]: Abstraction has 10772 states and 46336 transitions. [2021-05-21 21:01:59,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:01:59,737 INFO L276 IsEmpty]: Start isEmpty. Operand 10772 states and 46336 transitions. [2021-05-21 21:01:59,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:01:59,757 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:01:59,757 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:01:59,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:01:59,974 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:01:59,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:01:59,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1111982064, now seen corresponding path program 6 times [2021-05-21 21:01:59,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:01:59,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77603707] [2021-05-21 21:01:59,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:01:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:00,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:02:00,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77603707] [2021-05-21 21:02:00,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77603707] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:00,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445063484] [2021-05-21 21:02:00,018 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 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 [2021-05-21 21:02:00,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:02:00,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:02:00,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:02:00,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:02:00,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:00,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445063484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:00,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:02:00,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-21 21:02:00,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919024776] [2021-05-21 21:02:00,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:02:00,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:02:00,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:02:00,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:02:00,151 INFO L87 Difference]: Start difference. First operand 10772 states and 46336 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:00,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:02:00,498 INFO L93 Difference]: Finished difference Result 17283 states and 70897 transitions. [2021-05-21 21:02:00,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:02:00,501 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 21:02:00,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:02:00,548 INFO L225 Difference]: With dead ends: 17283 [2021-05-21 21:02:00,548 INFO L226 Difference]: Without dead ends: 17145 [2021-05-21 21:02:00,549 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 204.9ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-05-21 21:02:00,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17145 states. [2021-05-21 21:02:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17145 to 10795. [2021-05-21 21:02:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10795 states, 10794 states have (on average 4.285158421345192) internal successors, (46254), 10794 states have internal predecessors, (46254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:00,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10795 states to 10795 states and 46254 transitions. [2021-05-21 21:02:00,902 INFO L78 Accepts]: Start accepts. Automaton has 10795 states and 46254 transitions. Word has length 32 [2021-05-21 21:02:00,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:02:00,902 INFO L482 AbstractCegarLoop]: Abstraction has 10795 states and 46254 transitions. [2021-05-21 21:02:00,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:00,902 INFO L276 IsEmpty]: Start isEmpty. Operand 10795 states and 46254 transitions. [2021-05-21 21:02:00,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:02:00,920 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:02:00,920 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:02:01,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 21:02:01,121 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:02:01,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:02:01,122 INFO L82 PathProgramCache]: Analyzing trace with hash 416936404, now seen corresponding path program 7 times [2021-05-21 21:02:01,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:02:01,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479294272] [2021-05-21 21:02:01,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:02:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:02:01,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:02:01,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479294272] [2021-05-21 21:02:01,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479294272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:01,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409893683] [2021-05-21 21:02:01,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:02:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:01,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:02:01,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:02:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:01,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409893683] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:01,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:02:01,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 21:02:01,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191253102] [2021-05-21 21:02:01,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:02:01,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:02:01,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:02:01,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:02:01,302 INFO L87 Difference]: Start difference. First operand 10795 states and 46254 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:01,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:02:01,652 INFO L93 Difference]: Finished difference Result 26096 states and 108482 transitions. [2021-05-21 21:02:01,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 21:02:01,653 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 21:02:01,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:02:01,804 INFO L225 Difference]: With dead ends: 26096 [2021-05-21 21:02:01,804 INFO L226 Difference]: Without dead ends: 26096 [2021-05-21 21:02:01,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-05-21 21:02:01,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26096 states. [2021-05-21 21:02:02,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26096 to 14993. [2021-05-21 21:02:02,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14993 states, 14992 states have (on average 4.368729989327641) internal successors, (65496), 14992 states have internal predecessors, (65496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14993 states to 14993 states and 65496 transitions. [2021-05-21 21:02:02,225 INFO L78 Accepts]: Start accepts. Automaton has 14993 states and 65496 transitions. Word has length 32 [2021-05-21 21:02:02,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:02:02,225 INFO L482 AbstractCegarLoop]: Abstraction has 14993 states and 65496 transitions. [2021-05-21 21:02:02,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:02,225 INFO L276 IsEmpty]: Start isEmpty. Operand 14993 states and 65496 transitions. [2021-05-21 21:02:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:02:02,250 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:02:02,251 INFO L521 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:02:02,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 21:02:02,452 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:02:02,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:02:02,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1927074446, now seen corresponding path program 8 times [2021-05-21 21:02:02,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:02:02,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222597485] [2021-05-21 21:02:02,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:02:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:02:02,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:02:02,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222597485] [2021-05-21 21:02:02,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222597485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:02,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539364393] [2021-05-21 21:02:02,488 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 [2021-05-21 21:02:02,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:02:02,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:02:02,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:02:02,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:02:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:02,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539364393] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:02,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:02:02,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-21 21:02:02,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202894186] [2021-05-21 21:02:02,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:02:02,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:02:02,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:02:02,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:02:02,625 INFO L87 Difference]: Start difference. First operand 14993 states and 65496 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:02,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:02:02,906 INFO L93 Difference]: Finished difference Result 19071 states and 81167 transitions. [2021-05-21 21:02:02,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 21:02:02,906 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 21:02:02,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:02:02,951 INFO L225 Difference]: With dead ends: 19071 [2021-05-21 21:02:02,952 INFO L226 Difference]: Without dead ends: 19009 [2021-05-21 21:02:02,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:02:02,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19009 states. [2021-05-21 21:02:03,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19009 to 15495. [2021-05-21 21:02:03,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15495 states, 15494 states have (on average 4.3805344004130635) internal successors, (67872), 15494 states have internal predecessors, (67872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15495 states to 15495 states and 67872 transitions. [2021-05-21 21:02:03,434 INFO L78 Accepts]: Start accepts. Automaton has 15495 states and 67872 transitions. Word has length 32 [2021-05-21 21:02:03,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:02:03,434 INFO L482 AbstractCegarLoop]: Abstraction has 15495 states and 67872 transitions. [2021-05-21 21:02:03,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:03,435 INFO L276 IsEmpty]: Start isEmpty. Operand 15495 states and 67872 transitions. [2021-05-21 21:02:03,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:02:03,463 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:02:03,464 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:02:03,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 21:02:03,679 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:02:03,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:02:03,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1333496630, now seen corresponding path program 9 times [2021-05-21 21:02:03,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:02:03,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512734014] [2021-05-21 21:02:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:02:03,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:02:03,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:02:03,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512734014] [2021-05-21 21:02:03,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512734014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:03,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776770045] [2021-05-21 21:02:03,709 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 [2021-05-21 21:02:03,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:02:03,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:02:03,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:02:03,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:02:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:03,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776770045] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:03,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:02:03,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-21 21:02:03,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425601020] [2021-05-21 21:02:03,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 21:02:03,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:02:03,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 21:02:03,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:02:03,836 INFO L87 Difference]: Start difference. First operand 15495 states and 67872 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:04,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:02:04,163 INFO L93 Difference]: Finished difference Result 25596 states and 106759 transitions. [2021-05-21 21:02:04,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 21:02:04,164 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 21:02:04,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:02:04,241 INFO L225 Difference]: With dead ends: 25596 [2021-05-21 21:02:04,242 INFO L226 Difference]: Without dead ends: 25518 [2021-05-21 21:02:04,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:02:04,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25518 states. [2021-05-21 21:02:04,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25518 to 15518. [2021-05-21 21:02:04,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15518 states, 15517 states have (on average 4.374299155764645) internal successors, (67876), 15517 states have internal predecessors, (67876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:04,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15518 states to 15518 states and 67876 transitions. [2021-05-21 21:02:04,696 INFO L78 Accepts]: Start accepts. Automaton has 15518 states and 67876 transitions. Word has length 32 [2021-05-21 21:02:04,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:02:04,696 INFO L482 AbstractCegarLoop]: Abstraction has 15518 states and 67876 transitions. [2021-05-21 21:02:04,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:04,696 INFO L276 IsEmpty]: Start isEmpty. Operand 15518 states and 67876 transitions. [2021-05-21 21:02:04,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 21:02:04,727 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:02:04,727 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:02:04,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 21:02:04,937 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:02:04,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:02:04,937 INFO L82 PathProgramCache]: Analyzing trace with hash -126625480, now seen corresponding path program 10 times [2021-05-21 21:02:04,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:02:04,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903216485] [2021-05-21 21:02:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:02:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:04,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:02:04,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903216485] [2021-05-21 21:02:04,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903216485] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:04,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27400868] [2021-05-21 21:02:04,973 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 [2021-05-21 21:02:05,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:02:05,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:02:05,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-21 21:02:05,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:02:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:05,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27400868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:05,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:02:05,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-05-21 21:02:05,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468604385] [2021-05-21 21:02:05,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 21:02:05,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:02:05,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 21:02:05,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-05-21 21:02:05,097 INFO L87 Difference]: Start difference. First operand 15518 states and 67876 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:05,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:02:05,520 INFO L93 Difference]: Finished difference Result 25214 states and 104840 transitions. [2021-05-21 21:02:05,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 21:02:05,521 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 21:02:05,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:02:05,596 INFO L225 Difference]: With dead ends: 25214 [2021-05-21 21:02:05,596 INFO L226 Difference]: Without dead ends: 25094 [2021-05-21 21:02:05,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-05-21 21:02:05,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25094 states. [2021-05-21 21:02:06,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25094 to 16132. [2021-05-21 21:02:06,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16132 states, 16131 states have (on average 4.372140598846941) internal successors, (70527), 16131 states have internal predecessors, (70527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:06,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 70527 transitions. [2021-05-21 21:02:06,096 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 70527 transitions. Word has length 32 [2021-05-21 21:02:06,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:02:06,096 INFO L482 AbstractCegarLoop]: Abstraction has 16132 states and 70527 transitions. [2021-05-21 21:02:06,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:06,096 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 70527 transitions. [2021-05-21 21:02:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-21 21:02:06,128 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:02:06,128 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:02:06,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:02:06,337 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:02:06,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:02:06,339 INFO L82 PathProgramCache]: Analyzing trace with hash -906083662, now seen corresponding path program 11 times [2021-05-21 21:02:06,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:02:06,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667326118] [2021-05-21 21:02:06,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:02:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:06,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:06,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:02:06,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667326118] [2021-05-21 21:02:06,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667326118] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:06,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064549866] [2021-05-21 21:02:06,391 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 [2021-05-21 21:02:06,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:02:06,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:02:06,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:02:06,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:02:06,534 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:06,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064549866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:06,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:02:06,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-05-21 21:02:06,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240612608] [2021-05-21 21:02:06,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:02:06,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:02:06,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:02:06,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:02:06,535 INFO L87 Difference]: Start difference. First operand 16132 states and 70527 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:06,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:02:06,820 INFO L93 Difference]: Finished difference Result 30028 states and 127196 transitions. [2021-05-21 21:02:06,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:02:06,821 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-21 21:02:06,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:02:06,919 INFO L225 Difference]: With dead ends: 30028 [2021-05-21 21:02:06,920 INFO L226 Difference]: Without dead ends: 29440 [2021-05-21 21:02:06,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:02:06,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29440 states. [2021-05-21 21:02:07,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29440 to 21834. [2021-05-21 21:02:07,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21834 states, 21833 states have (on average 4.3858379517244535) internal successors, (95756), 21833 states have internal predecessors, (95756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:07,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21834 states to 21834 states and 95756 transitions. [2021-05-21 21:02:07,695 INFO L78 Accepts]: Start accepts. Automaton has 21834 states and 95756 transitions. Word has length 34 [2021-05-21 21:02:07,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:02:07,695 INFO L482 AbstractCegarLoop]: Abstraction has 21834 states and 95756 transitions. [2021-05-21 21:02:07,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:07,695 INFO L276 IsEmpty]: Start isEmpty. Operand 21834 states and 95756 transitions. [2021-05-21 21:02:07,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-21 21:02:07,737 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:02:07,738 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:02:07,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:02:07,939 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:02:07,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:02:07,939 INFO L82 PathProgramCache]: Analyzing trace with hash 778013198, now seen corresponding path program 12 times [2021-05-21 21:02:07,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:02:07,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990951230] [2021-05-21 21:02:07,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:02:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:08,037 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:02:08,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:02:08,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990951230] [2021-05-21 21:02:08,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990951230] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:08,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326829586] [2021-05-21 21:02:08,037 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 [2021-05-21 21:02:08,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:02:08,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:02:08,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:02:08,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:02:08,198 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:08,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326829586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:08,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:02:08,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-05-21 21:02:08,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337667853] [2021-05-21 21:02:08,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:02:08,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:02:08,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:02:08,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:02:08,200 INFO L87 Difference]: Start difference. First operand 21834 states and 95756 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:08,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:02:08,773 INFO L93 Difference]: Finished difference Result 60940 states and 262767 transitions. [2021-05-21 21:02:08,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:02:08,773 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-21 21:02:08,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:02:08,970 INFO L225 Difference]: With dead ends: 60940 [2021-05-21 21:02:08,970 INFO L226 Difference]: Without dead ends: 58958 [2021-05-21 21:02:08,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 21:02:09,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58958 states. [2021-05-21 21:02:10,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58958 to 39850. [2021-05-21 21:02:10,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39850 states, 39849 states have (on average 4.48199452934829) internal successors, (178603), 39849 states have internal predecessors, (178603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39850 states to 39850 states and 178603 transitions. [2021-05-21 21:02:10,237 INFO L78 Accepts]: Start accepts. Automaton has 39850 states and 178603 transitions. Word has length 34 [2021-05-21 21:02:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:02:10,237 INFO L482 AbstractCegarLoop]: Abstraction has 39850 states and 178603 transitions. [2021-05-21 21:02:10,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 39850 states and 178603 transitions. [2021-05-21 21:02:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-21 21:02:10,323 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:02:10,323 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:02:10,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-21 21:02:10,525 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:02:10,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:02:10,526 INFO L82 PathProgramCache]: Analyzing trace with hash 582128274, now seen corresponding path program 13 times [2021-05-21 21:02:10,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:02:10,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070773102] [2021-05-21 21:02:10,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:02:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:10,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:02:10,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:02:10,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070773102] [2021-05-21 21:02:10,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070773102] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:10,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217622328] [2021-05-21 21:02:10,560 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 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 [2021-05-21 21:02:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:10,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 21:02:10,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:02:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:10,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217622328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:10,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:02:10,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-05-21 21:02:10,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452549629] [2021-05-21 21:02:10,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 21:02:10,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:02:10,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 21:02:10,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:02:10,691 INFO L87 Difference]: Start difference. First operand 39850 states and 178603 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:02:11,299 INFO L93 Difference]: Finished difference Result 60941 states and 268418 transitions. [2021-05-21 21:02:11,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 21:02:11,300 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-21 21:02:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:02:11,496 INFO L225 Difference]: With dead ends: 60941 [2021-05-21 21:02:11,496 INFO L226 Difference]: Without dead ends: 60279 [2021-05-21 21:02:11,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-21 21:02:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60279 states. [2021-05-21 21:02:12,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60279 to 54948. [2021-05-21 21:02:12,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54948 states, 54947 states have (on average 4.507143247129052) internal successors, (247654), 54947 states have internal predecessors, (247654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:13,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54948 states to 54948 states and 247654 transitions. [2021-05-21 21:02:13,373 INFO L78 Accepts]: Start accepts. Automaton has 54948 states and 247654 transitions. Word has length 34 [2021-05-21 21:02:13,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:02:13,373 INFO L482 AbstractCegarLoop]: Abstraction has 54948 states and 247654 transitions. [2021-05-21 21:02:13,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 54948 states and 247654 transitions. [2021-05-21 21:02:13,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:02:13,495 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:02:13,496 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:02:13,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:02:13,696 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:02:13,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:02:13,696 INFO L82 PathProgramCache]: Analyzing trace with hash -523184720, now seen corresponding path program 14 times [2021-05-21 21:02:13,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:02:13,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579127607] [2021-05-21 21:02:13,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:02:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:13,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:02:13,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579127607] [2021-05-21 21:02:13,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579127607] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:13,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698234446] [2021-05-21 21:02:13,758 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 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 [2021-05-21 21:02:13,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:02:13,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:02:13,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:02:13,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:02:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:13,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698234446] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:13,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:02:13,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-05-21 21:02:13,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915667623] [2021-05-21 21:02:13,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:02:13,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:02:13,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:02:13,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:02:13,911 INFO L87 Difference]: Start difference. First operand 54948 states and 247654 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:15,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:02:15,175 INFO L93 Difference]: Finished difference Result 115835 states and 498368 transitions. [2021-05-21 21:02:15,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 21:02:15,175 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-21 21:02:15,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:02:15,846 INFO L225 Difference]: With dead ends: 115835 [2021-05-21 21:02:15,847 INFO L226 Difference]: Without dead ends: 115835 [2021-05-21 21:02:15,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 341.2ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:02:15,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115835 states. [2021-05-21 21:02:17,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115835 to 56994. [2021-05-21 21:02:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56994 states, 56993 states have (on average 4.487621286824698) internal successors, (255763), 56993 states have internal predecessors, (255763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:17,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56994 states to 56994 states and 255763 transitions. [2021-05-21 21:02:17,829 INFO L78 Accepts]: Start accepts. Automaton has 56994 states and 255763 transitions. Word has length 36 [2021-05-21 21:02:17,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:02:17,830 INFO L482 AbstractCegarLoop]: Abstraction has 56994 states and 255763 transitions. [2021-05-21 21:02:17,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:17,830 INFO L276 IsEmpty]: Start isEmpty. Operand 56994 states and 255763 transitions. [2021-05-21 21:02:17,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:02:17,959 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:02:17,959 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:02:18,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-21 21:02:18,160 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:02:18,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:02:18,160 INFO L82 PathProgramCache]: Analyzing trace with hash 2101133940, now seen corresponding path program 15 times [2021-05-21 21:02:18,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:02:18,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879484028] [2021-05-21 21:02:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:02:18,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:18,211 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:18,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:02:18,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879484028] [2021-05-21 21:02:18,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879484028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:18,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63708216] [2021-05-21 21:02:18,211 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 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 [2021-05-21 21:02:18,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:02:18,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:02:18,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:02:18,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:02:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:18,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63708216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:18,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:02:18,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 21:02:18,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807784591] [2021-05-21 21:02:18,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:02:18,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:02:18,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:02:18,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:02:18,677 INFO L87 Difference]: Start difference. First operand 56994 states and 255763 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:20,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:02:20,350 INFO L93 Difference]: Finished difference Result 148781 states and 646238 transitions. [2021-05-21 21:02:20,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 21:02:20,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-21 21:02:20,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:02:20,845 INFO L225 Difference]: With dead ends: 148781 [2021-05-21 21:02:20,845 INFO L226 Difference]: Without dead ends: 147463 [2021-05-21 21:02:20,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 794.8ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 21:02:21,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147463 states. [2021-05-21 21:02:23,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147463 to 80557. [2021-05-21 21:02:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80557 states, 80556 states have (on average 4.52723571180297) internal successors, (364696), 80556 states have internal predecessors, (364696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:24,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80557 states to 80557 states and 364696 transitions. [2021-05-21 21:02:24,080 INFO L78 Accepts]: Start accepts. Automaton has 80557 states and 364696 transitions. Word has length 36 [2021-05-21 21:02:24,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:02:24,080 INFO L482 AbstractCegarLoop]: Abstraction has 80557 states and 364696 transitions. [2021-05-21 21:02:24,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:24,081 INFO L276 IsEmpty]: Start isEmpty. Operand 80557 states and 364696 transitions. [2021-05-21 21:02:24,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:02:24,716 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:02:24,717 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:02:24,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:02:24,917 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:02:24,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:02:24,917 INFO L82 PathProgramCache]: Analyzing trace with hash -8737100, now seen corresponding path program 16 times [2021-05-21 21:02:24,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:02:24,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550915937] [2021-05-21 21:02:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:02:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:24,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:02:24,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550915937] [2021-05-21 21:02:24,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550915937] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:24,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250924650] [2021-05-21 21:02:24,960 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 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 [2021-05-21 21:02:24,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:02:24,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:02:24,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:02:24,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:02:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:25,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250924650] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:25,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:02:25,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-05-21 21:02:25,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091635157] [2021-05-21 21:02:25,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:02:25,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:02:25,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:02:25,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:02:25,110 INFO L87 Difference]: Start difference. First operand 80557 states and 364696 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:26,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:02:26,844 INFO L93 Difference]: Finished difference Result 170107 states and 749961 transitions. [2021-05-21 21:02:26,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 21:02:26,845 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-21 21:02:26,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:02:27,441 INFO L225 Difference]: With dead ends: 170107 [2021-05-21 21:02:27,442 INFO L226 Difference]: Without dead ends: 170087 [2021-05-21 21:02:27,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:02:27,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170087 states. [2021-05-21 21:02:31,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170087 to 102149. [2021-05-21 21:02:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102149 states, 102148 states have (on average 4.5491933273289735) internal successors, (464691), 102148 states have internal predecessors, (464691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:31,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102149 states to 102149 states and 464691 transitions. [2021-05-21 21:02:31,949 INFO L78 Accepts]: Start accepts. Automaton has 102149 states and 464691 transitions. Word has length 36 [2021-05-21 21:02:31,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:02:31,950 INFO L482 AbstractCegarLoop]: Abstraction has 102149 states and 464691 transitions. [2021-05-21 21:02:31,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:31,950 INFO L276 IsEmpty]: Start isEmpty. Operand 102149 states and 464691 transitions. [2021-05-21 21:02:32,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:02:32,118 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:02:32,118 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:02:32,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 21:02:32,319 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:02:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:02:32,319 INFO L82 PathProgramCache]: Analyzing trace with hash 639165552, now seen corresponding path program 17 times [2021-05-21 21:02:32,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:02:32,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570512527] [2021-05-21 21:02:32,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:02:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:32,358 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:32,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:02:32,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570512527] [2021-05-21 21:02:32,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570512527] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:32,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824748647] [2021-05-21 21:02:32,358 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 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 [2021-05-21 21:02:32,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 21:02:32,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:02:32,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:02:32,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:02:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:32,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824748647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:32,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:02:32,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-05-21 21:02:32,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86791283] [2021-05-21 21:02:32,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:02:32,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:02:32,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:02:32,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:02:32,507 INFO L87 Difference]: Start difference. First operand 102149 states and 464691 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:33,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:02:33,985 INFO L93 Difference]: Finished difference Result 140554 states and 618093 transitions. [2021-05-21 21:02:33,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 21:02:33,985 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-21 21:02:33,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:02:34,481 INFO L225 Difference]: With dead ends: 140554 [2021-05-21 21:02:34,481 INFO L226 Difference]: Without dead ends: 140250 [2021-05-21 21:02:34,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 334.4ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:02:34,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140250 states. [2021-05-21 21:02:37,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140250 to 98725. [2021-05-21 21:02:37,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98725 states, 98724 states have (on average 4.555366476236781) internal successors, (449724), 98724 states have internal predecessors, (449724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98725 states to 98725 states and 449724 transitions. [2021-05-21 21:02:38,207 INFO L78 Accepts]: Start accepts. Automaton has 98725 states and 449724 transitions. Word has length 36 [2021-05-21 21:02:38,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:02:38,208 INFO L482 AbstractCegarLoop]: Abstraction has 98725 states and 449724 transitions. [2021-05-21 21:02:38,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:38,208 INFO L276 IsEmpty]: Start isEmpty. Operand 98725 states and 449724 transitions. [2021-05-21 21:02:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:02:38,411 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:02:38,412 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:02:38,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 21:02:38,612 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:02:38,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:02:38,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1378983634, now seen corresponding path program 18 times [2021-05-21 21:02:38,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:02:38,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221969970] [2021-05-21 21:02:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:02:38,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:02:38,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:02:38,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221969970] [2021-05-21 21:02:38,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221969970] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:38,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558075678] [2021-05-21 21:02:38,655 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 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 [2021-05-21 21:02:38,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:02:38,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:02:38,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:02:38,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:02:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:39,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558075678] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:39,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:02:39,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-05-21 21:02:39,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742975152] [2021-05-21 21:02:39,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:02:39,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:02:39,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:02:39,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:02:39,331 INFO L87 Difference]: Start difference. First operand 98725 states and 449724 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:40,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:02:40,957 INFO L93 Difference]: Finished difference Result 157433 states and 697584 transitions. [2021-05-21 21:02:40,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 21:02:40,972 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-21 21:02:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:02:41,520 INFO L225 Difference]: With dead ends: 157433 [2021-05-21 21:02:41,520 INFO L226 Difference]: Without dead ends: 156538 [2021-05-21 21:02:41,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 779.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:02:41,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156538 states. [2021-05-21 21:02:45,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156538 to 110101. [2021-05-21 21:02:45,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110101 states, 110100 states have (on average 4.5832970027247955) internal successors, (504621), 110100 states have internal predecessors, (504621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:45,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110101 states to 110101 states and 504621 transitions. [2021-05-21 21:02:45,676 INFO L78 Accepts]: Start accepts. Automaton has 110101 states and 504621 transitions. Word has length 36 [2021-05-21 21:02:45,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:02:45,676 INFO L482 AbstractCegarLoop]: Abstraction has 110101 states and 504621 transitions. [2021-05-21 21:02:45,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:45,677 INFO L276 IsEmpty]: Start isEmpty. Operand 110101 states and 504621 transitions. [2021-05-21 21:02:45,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:02:45,866 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:02:45,867 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:02:46,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 21:02:46,073 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:02:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:02:46,073 INFO L82 PathProgramCache]: Analyzing trace with hash 421465332, now seen corresponding path program 19 times [2021-05-21 21:02:46,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:02:46,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253478993] [2021-05-21 21:02:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:02:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:46,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:46,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:02:46,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253478993] [2021-05-21 21:02:46,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253478993] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:46,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141739571] [2021-05-21 21:02:46,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:02:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:46,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:02:46,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:02:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:46,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141739571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:46,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:02:46,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-21 21:02:46,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500963326] [2021-05-21 21:02:46,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:02:46,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:02:46,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:02:46,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:02:46,258 INFO L87 Difference]: Start difference. First operand 110101 states and 504621 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:48,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:02:48,075 INFO L93 Difference]: Finished difference Result 192417 states and 850027 transitions. [2021-05-21 21:02:48,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 21:02:48,076 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-21 21:02:48,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:02:49,208 INFO L225 Difference]: With dead ends: 192417 [2021-05-21 21:02:49,208 INFO L226 Difference]: Without dead ends: 191725 [2021-05-21 21:02:49,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 372.5ms TimeCoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 21:02:49,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191725 states. [2021-05-21 21:02:53,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191725 to 118442. [2021-05-21 21:02:53,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118442 states, 118441 states have (on average 4.604208002296502) internal successors, (545327), 118441 states have internal predecessors, (545327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:53,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118442 states to 118442 states and 545327 transitions. [2021-05-21 21:02:53,738 INFO L78 Accepts]: Start accepts. Automaton has 118442 states and 545327 transitions. Word has length 36 [2021-05-21 21:02:53,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:02:53,738 INFO L482 AbstractCegarLoop]: Abstraction has 118442 states and 545327 transitions. [2021-05-21 21:02:53,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:53,738 INFO L276 IsEmpty]: Start isEmpty. Operand 118442 states and 545327 transitions. [2021-05-21 21:02:54,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:02:54,451 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:02:54,451 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:02:54,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-21 21:02:54,665 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:02:54,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:02:54,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1506818294, now seen corresponding path program 20 times [2021-05-21 21:02:54,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:02:54,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687380543] [2021-05-21 21:02:54,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:02:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:02:54,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:02:54,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:02:54,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687380543] [2021-05-21 21:02:54,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687380543] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:54,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891866741] [2021-05-21 21:02:54,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-21 21:02:54,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:02:54,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:02:54,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:02:54,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:02:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:02:54,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891866741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:02:54,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:02:54,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 21:02:54,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612516837] [2021-05-21 21:02:54,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:02:54,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:02:54,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:02:54,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:02:54,853 INFO L87 Difference]: Start difference. First operand 118442 states and 545327 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:02:56,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:02:56,920 INFO L93 Difference]: Finished difference Result 221192 states and 968042 transitions. [2021-05-21 21:02:56,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 21:02:56,921 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-21 21:02:56,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:02:57,736 INFO L225 Difference]: With dead ends: 221192 [2021-05-21 21:02:57,736 INFO L226 Difference]: Without dead ends: 221192 [2021-05-21 21:02:57,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 348.3ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:02:58,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221192 states. [2021-05-21 21:03:01,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221192 to 115584. [2021-05-21 21:03:02,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115584 states, 115583 states have (on average 4.562331830805569) internal successors, (527328), 115583 states have internal predecessors, (527328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:03:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115584 states to 115584 states and 527328 transitions. [2021-05-21 21:03:03,006 INFO L78 Accepts]: Start accepts. Automaton has 115584 states and 527328 transitions. Word has length 36 [2021-05-21 21:03:03,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:03:03,006 INFO L482 AbstractCegarLoop]: Abstraction has 115584 states and 527328 transitions. [2021-05-21 21:03:03,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:03:03,006 INFO L276 IsEmpty]: Start isEmpty. Operand 115584 states and 527328 transitions. [2021-05-21 21:03:03,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:03:03,199 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:03:03,199 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:03:03,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 21:03:03,400 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:03:03,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:03:03,400 INFO L82 PathProgramCache]: Analyzing trace with hash -2125183306, now seen corresponding path program 21 times [2021-05-21 21:03:03,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:03:03,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183499172] [2021-05-21 21:03:03,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:03:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:03:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:03:03,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:03:03,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183499172] [2021-05-21 21:03:03,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183499172] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:03:03,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084636877] [2021-05-21 21:03:03,447 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 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 [2021-05-21 21:03:03,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:03:03,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:03:03,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:03:03,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:03:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:03:03,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084636877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:03:03,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:03:03,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-21 21:03:03,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806130513] [2021-05-21 21:03:03,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:03:03,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:03:03,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:03:03,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:03:03,585 INFO L87 Difference]: Start difference. First operand 115584 states and 527328 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:03:05,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:03:05,559 INFO L93 Difference]: Finished difference Result 149434 states and 659887 transitions. [2021-05-21 21:03:05,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 21:03:05,559 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-21 21:03:05,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:03:06,324 INFO L225 Difference]: With dead ends: 149434 [2021-05-21 21:03:06,324 INFO L226 Difference]: Without dead ends: 149030 [2021-05-21 21:03:06,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 335.0ms TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 21:03:06,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149030 states. [2021-05-21 21:03:09,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149030 to 114434. [2021-05-21 21:03:09,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114434 states, 114433 states have (on average 4.564548687878497) internal successors, (522335), 114433 states have internal predecessors, (522335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:03:10,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114434 states to 114434 states and 522335 transitions. [2021-05-21 21:03:10,305 INFO L78 Accepts]: Start accepts. Automaton has 114434 states and 522335 transitions. Word has length 36 [2021-05-21 21:03:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:03:10,305 INFO L482 AbstractCegarLoop]: Abstraction has 114434 states and 522335 transitions. [2021-05-21 21:03:10,305 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:03:10,305 INFO L276 IsEmpty]: Start isEmpty. Operand 114434 states and 522335 transitions. [2021-05-21 21:03:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:03:10,479 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:03:10,479 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:03:10,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:03:10,681 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:03:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:03:10,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1698176276, now seen corresponding path program 22 times [2021-05-21 21:03:10,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:03:10,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994167352] [2021-05-21 21:03:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:03:10,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:03:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:03:10,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:03:10,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994167352] [2021-05-21 21:03:10,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994167352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:03:10,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066307838] [2021-05-21 21:03:10,730 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 [2021-05-21 21:03:10,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:03:10,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:03:10,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:03:10,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:03:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:03:10,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066307838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:03:10,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:03:10,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-21 21:03:10,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271574379] [2021-05-21 21:03:10,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:03:10,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:03:10,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:03:10,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:03:10,880 INFO L87 Difference]: Start difference. First operand 114434 states and 522335 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:03:13,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:03:13,573 INFO L93 Difference]: Finished difference Result 262218 states and 1170693 transitions. [2021-05-21 21:03:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 21:03:13,574 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-21 21:03:13,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:03:14,668 INFO L225 Difference]: With dead ends: 262218 [2021-05-21 21:03:14,668 INFO L226 Difference]: Without dead ends: 262218 [2021-05-21 21:03:14,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 21:03:15,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262218 states. [2021-05-21 21:03:20,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262218 to 187390. [2021-05-21 21:03:20,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187390 states, 187389 states have (on average 4.617053295550966) internal successors, (865185), 187389 states have internal predecessors, (865185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:03:22,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187390 states to 187390 states and 865185 transitions. [2021-05-21 21:03:22,287 INFO L78 Accepts]: Start accepts. Automaton has 187390 states and 865185 transitions. Word has length 36 [2021-05-21 21:03:22,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:03:22,287 INFO L482 AbstractCegarLoop]: Abstraction has 187390 states and 865185 transitions. [2021-05-21 21:03:22,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:03:22,287 INFO L276 IsEmpty]: Start isEmpty. Operand 187390 states and 865185 transitions. [2021-05-21 21:03:22,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:03:22,567 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:03:22,567 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:03:22,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-21 21:03:22,768 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:03:22,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:03:22,769 INFO L82 PathProgramCache]: Analyzing trace with hash -52256758, now seen corresponding path program 23 times [2021-05-21 21:03:22,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:03:22,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213010205] [2021-05-21 21:03:22,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:03:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:03:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:03:22,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:03:22,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213010205] [2021-05-21 21:03:22,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213010205] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:03:22,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30301418] [2021-05-21 21:03:22,801 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 [2021-05-21 21:03:22,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:03:22,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:03:22,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:03:22,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:03:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:03:22,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30301418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:03:22,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:03:22,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-05-21 21:03:22,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513363832] [2021-05-21 21:03:22,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:03:22,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:03:22,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:03:22,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:03:22,937 INFO L87 Difference]: Start difference. First operand 187390 states and 865185 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:03:23,644 WARN L205 SmtUtils]: Spent 665.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 10 [2021-05-21 21:03:25,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:03:25,806 INFO L93 Difference]: Finished difference Result 254683 states and 1137807 transitions. [2021-05-21 21:03:25,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 21:03:25,806 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-21 21:03:25,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:03:26,774 INFO L225 Difference]: With dead ends: 254683 [2021-05-21 21:03:26,775 INFO L226 Difference]: Without dead ends: 254373 [2021-05-21 21:03:26,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 956.0ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 21:03:27,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254373 states. [2021-05-21 21:03:32,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254373 to 187000. [2021-05-21 21:03:32,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187000 states, 186999 states have (on average 4.611853539323739) internal successors, (862412), 186999 states have internal predecessors, (862412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:03:33,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187000 states to 187000 states and 862412 transitions. [2021-05-21 21:03:33,952 INFO L78 Accepts]: Start accepts. Automaton has 187000 states and 862412 transitions. Word has length 36 [2021-05-21 21:03:33,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:03:33,952 INFO L482 AbstractCegarLoop]: Abstraction has 187000 states and 862412 transitions. [2021-05-21 21:03:33,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:03:33,952 INFO L276 IsEmpty]: Start isEmpty. Operand 187000 states and 862412 transitions. [2021-05-21 21:03:34,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:03:34,235 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:03:34,235 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:03:34,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:03:34,436 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:03:34,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:03:34,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1154614392, now seen corresponding path program 24 times [2021-05-21 21:03:34,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:03:34,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804311121] [2021-05-21 21:03:34,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:03:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:03:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:03:34,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:03:34,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804311121] [2021-05-21 21:03:34,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804311121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:03:34,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369710740] [2021-05-21 21:03:34,483 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 [2021-05-21 21:03:34,511 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:03:34,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:03:34,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:03:34,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:03:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:03:34,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369710740] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:03:34,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:03:34,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-05-21 21:03:34,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863542200] [2021-05-21 21:03:34,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:03:34,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:03:34,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:03:34,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:03:34,626 INFO L87 Difference]: Start difference. First operand 187000 states and 862412 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:03:35,392 WARN L205 SmtUtils]: Spent 741.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 10 [2021-05-21 21:03:37,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:03:37,730 INFO L93 Difference]: Finished difference Result 283294 states and 1263502 transitions. [2021-05-21 21:03:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 21:03:37,730 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-21 21:03:37,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:03:38,774 INFO L225 Difference]: With dead ends: 283294 [2021-05-21 21:03:38,774 INFO L226 Difference]: Without dead ends: 282784 [2021-05-21 21:03:38,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1073.8ms TimeCoverageRelationStatistics Valid=404, Invalid=1078, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 21:03:39,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282784 states. [2021-05-21 21:03:45,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282784 to 207055. [2021-05-21 21:03:45,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207055 states, 207054 states have (on average 4.6254455359471445) internal successors, (957717), 207054 states have internal predecessors, (957717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:03:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207055 states to 207055 states and 957717 transitions. [2021-05-21 21:03:47,097 INFO L78 Accepts]: Start accepts. Automaton has 207055 states and 957717 transitions. Word has length 36 [2021-05-21 21:03:47,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:03:47,097 INFO L482 AbstractCegarLoop]: Abstraction has 207055 states and 957717 transitions. [2021-05-21 21:03:47,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:03:47,097 INFO L276 IsEmpty]: Start isEmpty. Operand 207055 states and 957717 transitions. [2021-05-21 21:03:47,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 21:03:47,418 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:03:47,418 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:03:47,618 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-21 21:03:47,618 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:03:47,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:03:47,619 INFO L82 PathProgramCache]: Analyzing trace with hash 333714932, now seen corresponding path program 25 times [2021-05-21 21:03:47,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:03:47,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848823463] [2021-05-21 21:03:47,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:03:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:03:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:03:47,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:03:47,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848823463] [2021-05-21 21:03:47,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848823463] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:03:47,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610609636] [2021-05-21 21:03:47,670 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 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 [2021-05-21 21:03:47,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:03:47,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 21:03:47,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:03:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:03:47,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610609636] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:03:47,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:03:47,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-05-21 21:03:47,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126352338] [2021-05-21 21:03:47,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 21:03:47,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:03:47,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 21:03:47,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-05-21 21:03:47,812 INFO L87 Difference]: Start difference. First operand 207055 states and 957717 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:03:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:03:50,954 INFO L93 Difference]: Finished difference Result 290122 states and 1295399 transitions. [2021-05-21 21:03:50,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 21:03:50,955 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-21 21:03:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:03:52,060 INFO L225 Difference]: With dead ends: 290122 [2021-05-21 21:03:52,060 INFO L226 Difference]: Without dead ends: 289652 [2021-05-21 21:03:52,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 469.8ms TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 21:03:52,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289652 states. [2021-05-21 21:03:58,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289652 to 218816. [2021-05-21 21:03:58,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218816 states, 218815 states have (on average 4.624737792198889) internal successors, (1011962), 218815 states have internal predecessors, (1011962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:04:00,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218816 states to 218816 states and 1011962 transitions. [2021-05-21 21:04:00,990 INFO L78 Accepts]: Start accepts. Automaton has 218816 states and 1011962 transitions. Word has length 36 [2021-05-21 21:04:00,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:04:00,990 INFO L482 AbstractCegarLoop]: Abstraction has 218816 states and 1011962 transitions. [2021-05-21 21:04:00,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:04:00,990 INFO L276 IsEmpty]: Start isEmpty. Operand 218816 states and 1011962 transitions. [2021-05-21 21:04:01,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 21:04:01,419 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:04:01,419 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:04:01,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-21 21:04:01,633 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:04:01,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:04:01,633 INFO L82 PathProgramCache]: Analyzing trace with hash 699829746, now seen corresponding path program 26 times [2021-05-21 21:04:01,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:04:01,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440147542] [2021-05-21 21:04:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:04:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:04:01,672 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:04:01,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:04:01,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440147542] [2021-05-21 21:04:01,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440147542] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:04:01,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703187587] [2021-05-21 21:04:01,673 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 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 [2021-05-21 21:04:01,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:04:01,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:04:01,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:04:01,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:04:01,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:04:01,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703187587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:04:01,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:04:01,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-05-21 21:04:01,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111342064] [2021-05-21 21:04:01,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:04:01,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:04:01,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:04:01,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:04:01,835 INFO L87 Difference]: Start difference. First operand 218816 states and 1011962 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:04:04,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:04:04,381 INFO L93 Difference]: Finished difference Result 275767 states and 1260077 transitions. [2021-05-21 21:04:04,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:04:04,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-21 21:04:04,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:04:06,541 INFO L225 Difference]: With dead ends: 275767 [2021-05-21 21:04:06,541 INFO L226 Difference]: Without dead ends: 274998 [2021-05-21 21:04:06,541 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:04:06,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274998 states. [2021-05-21 21:04:13,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274998 to 238003. [2021-05-21 21:04:13,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238003 states, 238002 states have (on average 4.6232090486634565) internal successors, (1100333), 238002 states have internal predecessors, (1100333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:04:15,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238003 states to 238003 states and 1100333 transitions. [2021-05-21 21:04:15,330 INFO L78 Accepts]: Start accepts. Automaton has 238003 states and 1100333 transitions. Word has length 38 [2021-05-21 21:04:15,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:04:15,330 INFO L482 AbstractCegarLoop]: Abstraction has 238003 states and 1100333 transitions. [2021-05-21 21:04:15,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:04:15,330 INFO L276 IsEmpty]: Start isEmpty. Operand 238003 states and 1100333 transitions. [2021-05-21 21:04:15,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 21:04:15,749 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:04:15,749 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:04:15,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-05-21 21:04:15,949 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:04:15,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:04:15,950 INFO L82 PathProgramCache]: Analyzing trace with hash -741519670, now seen corresponding path program 27 times [2021-05-21 21:04:15,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:04:15,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627715983] [2021-05-21 21:04:15,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:04:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:04:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:04:15,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:04:15,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627715983] [2021-05-21 21:04:15,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627715983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:04:15,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462685968] [2021-05-21 21:04:15,992 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 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 [2021-05-21 21:04:16,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 21:04:16,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:04:16,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:04:16,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:04:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:04:16,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462685968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:04:16,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:04:16,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-05-21 21:04:16,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379026256] [2021-05-21 21:04:16,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:04:16,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:04:16,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:04:16,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:04:16,138 INFO L87 Difference]: Start difference. First operand 238003 states and 1100333 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:04:19,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:04:19,475 INFO L93 Difference]: Finished difference Result 394201 states and 1792824 transitions. [2021-05-21 21:04:19,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 21:04:19,476 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-21 21:04:19,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:04:21,034 INFO L225 Difference]: With dead ends: 394201 [2021-05-21 21:04:21,034 INFO L226 Difference]: Without dead ends: 392734 [2021-05-21 21:04:21,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:04:22,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392734 states. [2021-05-21 21:04:30,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392734 to 306278. [2021-05-21 21:04:31,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306278 states, 306277 states have (on average 4.624082121739471) internal successors, (1416250), 306277 states have internal predecessors, (1416250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:04:33,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306278 states to 306278 states and 1416250 transitions. [2021-05-21 21:04:33,804 INFO L78 Accepts]: Start accepts. Automaton has 306278 states and 1416250 transitions. Word has length 38 [2021-05-21 21:04:33,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:04:33,805 INFO L482 AbstractCegarLoop]: Abstraction has 306278 states and 1416250 transitions. [2021-05-21 21:04:33,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:04:33,805 INFO L276 IsEmpty]: Start isEmpty. Operand 306278 states and 1416250 transitions. [2021-05-21 21:04:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 21:04:34,402 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:04:34,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:04:34,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-21 21:04:34,603 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:04:34,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:04:34,603 INFO L82 PathProgramCache]: Analyzing trace with hash 1495021836, now seen corresponding path program 1 times [2021-05-21 21:04:34,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:04:34,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803838438] [2021-05-21 21:04:34,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:04:34,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:04:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:04:34,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:04:34,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803838438] [2021-05-21 21:04:34,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803838438] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:04:34,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726112154] [2021-05-21 21:04:34,647 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-05-21 21:04:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:04:34,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 21:04:34,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:04:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:04:34,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726112154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:04:34,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:04:34,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-05-21 21:04:34,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181558487] [2021-05-21 21:04:34,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 21:04:34,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:04:34,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 21:04:34,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-21 21:04:34,824 INFO L87 Difference]: Start difference. First operand 306278 states and 1416250 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:04:40,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:04:40,917 INFO L93 Difference]: Finished difference Result 586179 states and 2672233 transitions. [2021-05-21 21:04:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 21:04:40,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-21 21:04:40,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:04:45,349 INFO L225 Difference]: With dead ends: 586179 [2021-05-21 21:04:45,350 INFO L226 Difference]: Without dead ends: 583951 [2021-05-21 21:04:45,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:04:46,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583951 states. [2021-05-21 21:04:59,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583951 to 425975. [2021-05-21 21:05:00,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425975 states, 425974 states have (on average 4.631465770211327) internal successors, (1972884), 425974 states have internal predecessors, (1972884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:05:03,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425975 states to 425975 states and 1972884 transitions. [2021-05-21 21:05:03,565 INFO L78 Accepts]: Start accepts. Automaton has 425975 states and 1972884 transitions. Word has length 38 [2021-05-21 21:05:03,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:05:03,565 INFO L482 AbstractCegarLoop]: Abstraction has 425975 states and 1972884 transitions. [2021-05-21 21:05:03,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:05:03,565 INFO L276 IsEmpty]: Start isEmpty. Operand 425975 states and 1972884 transitions. [2021-05-21 21:05:05,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-21 21:05:05,062 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:05:05,062 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:05:05,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 21:05:05,272 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:05:05,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:05:05,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1674170670, now seen corresponding path program 28 times [2021-05-21 21:05:05,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:05:05,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339370971] [2021-05-21 21:05:05,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:05:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:05:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-21 21:05:05,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:05:05,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339370971] [2021-05-21 21:05:05,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339370971] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:05:05,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051233456] [2021-05-21 21:05:05,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:05:05,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:05:05,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:05:05,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 21:05:05,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:05:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:05:05,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051233456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:05:05,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:05:05,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-05-21 21:05:05,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201570423] [2021-05-21 21:05:05,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 21:05:05,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:05:05,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 21:05:05,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:05:05,609 INFO L87 Difference]: Start difference. First operand 425975 states and 1972884 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:05:10,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:05:10,350 INFO L93 Difference]: Finished difference Result 560533 states and 2590081 transitions. [2021-05-21 21:05:10,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 21:05:10,350 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-05-21 21:05:10,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:05:13,631 INFO L225 Difference]: With dead ends: 560533 [2021-05-21 21:05:13,632 INFO L226 Difference]: Without dead ends: 559708 [2021-05-21 21:05:13,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 163.2ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-21 21:05:15,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559708 states. [2021-05-21 21:05:31,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559708 to 545995. [2021-05-21 21:05:32,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545995 states, 545994 states have (on average 4.646322120755905) internal successors, (2536864), 545994 states have internal predecessors, (2536864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:05:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545995 states to 545995 states and 2536864 transitions. [2021-05-21 21:05:37,998 INFO L78 Accepts]: Start accepts. Automaton has 545995 states and 2536864 transitions. Word has length 38 [2021-05-21 21:05:37,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:05:37,999 INFO L482 AbstractCegarLoop]: Abstraction has 545995 states and 2536864 transitions. [2021-05-21 21:05:37,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:05:37,999 INFO L276 IsEmpty]: Start isEmpty. Operand 545995 states and 2536864 transitions. [2021-05-21 21:05:40,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 21:05:40,582 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:05:40,582 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:05:40,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:05:40,799 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:05:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:05:40,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1628737040, now seen corresponding path program 29 times [2021-05-21 21:05:40,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:05:40,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574000411] [2021-05-21 21:05:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:05:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:05:40,886 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:05:40,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:05:40,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574000411] [2021-05-21 21:05:40,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574000411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:05:40,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433558062] [2021-05-21 21:05:40,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:05:40,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 21:05:40,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:05:40,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:05:40,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:05:41,113 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:05:41,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433558062] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:05:41,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:05:41,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-05-21 21:05:41,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007749458] [2021-05-21 21:05:41,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 21:05:41,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:05:41,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 21:05:41,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-05-21 21:05:41,114 INFO L87 Difference]: Start difference. First operand 545995 states and 2536864 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:05:50,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:05:50,847 INFO L93 Difference]: Finished difference Result 810316 states and 3662784 transitions. [2021-05-21 21:05:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 21:05:50,848 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-21 21:05:50,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:05:58,154 INFO L225 Difference]: With dead ends: 810316 [2021-05-21 21:05:58,154 INFO L226 Difference]: Without dead ends: 810316 [2021-05-21 21:05:58,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 599.5ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 21:05:59,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810316 states. [2021-05-21 21:06:20,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810316 to 534782. [2021-05-21 21:06:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534782 states, 534781 states have (on average 4.638676392766385) internal successors, (2480676), 534781 states have internal predecessors, (2480676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:06:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534782 states to 534782 states and 2480676 transitions. [2021-05-21 21:06:24,496 INFO L78 Accepts]: Start accepts. Automaton has 534782 states and 2480676 transitions. Word has length 40 [2021-05-21 21:06:24,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:06:24,497 INFO L482 AbstractCegarLoop]: Abstraction has 534782 states and 2480676 transitions. [2021-05-21 21:06:24,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:06:24,497 INFO L276 IsEmpty]: Start isEmpty. Operand 534782 states and 2480676 transitions. [2021-05-21 21:06:25,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 21:06:25,567 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:06:25,567 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:06:25,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-21 21:06:25,781 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:06:25,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:06:25,781 INFO L82 PathProgramCache]: Analyzing trace with hash -804307532, now seen corresponding path program 30 times [2021-05-21 21:06:25,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:06:25,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763741444] [2021-05-21 21:06:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:06:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:06:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:06:26,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:06:26,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763741444] [2021-05-21 21:06:26,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763741444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:06:26,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817520265] [2021-05-21 21:06:26,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:06:26,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 21:06:26,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:06:26,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:06:26,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:06:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:06:26,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817520265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:06:26,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:06:26,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-05-21 21:06:26,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062923370] [2021-05-21 21:06:26,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 21:06:26,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:06:26,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 21:06:26,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-05-21 21:06:26,632 INFO L87 Difference]: Start difference. First operand 534782 states and 2480676 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:06:39,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:06:39,733 INFO L93 Difference]: Finished difference Result 1136355 states and 5157666 transitions. [2021-05-21 21:06:39,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-21 21:06:39,734 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-21 21:06:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:06:46,356 INFO L225 Difference]: With dead ends: 1136355 [2021-05-21 21:06:46,357 INFO L226 Difference]: Without dead ends: 1133906 [2021-05-21 21:06:46,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 1598.5ms TimeCoverageRelationStatistics Valid=1280, Invalid=3976, Unknown=0, NotChecked=0, Total=5256 [2021-05-21 21:06:48,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133906 states. [2021-05-21 21:07:23,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133906 to 706666. [2021-05-21 21:07:24,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706666 states, 706665 states have (on average 4.660015707584216) internal successors, (3293070), 706665 states have internal predecessors, (3293070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:31,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706666 states to 706666 states and 3293070 transitions. [2021-05-21 21:07:31,778 INFO L78 Accepts]: Start accepts. Automaton has 706666 states and 3293070 transitions. Word has length 40 [2021-05-21 21:07:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:07:31,778 INFO L482 AbstractCegarLoop]: Abstraction has 706666 states and 3293070 transitions. [2021-05-21 21:07:31,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:07:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 706666 states and 3293070 transitions. [2021-05-21 21:07:34,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 21:07:34,017 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:07:34,017 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:07:34,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 21:07:34,234 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:07:34,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:07:34,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1830337484, now seen corresponding path program 31 times [2021-05-21 21:07:34,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:07:34,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221065388] [2021-05-21 21:07:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:07:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:34,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:34,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:07:34,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221065388] [2021-05-21 21:07:34,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221065388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:34,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150958738] [2021-05-21 21:07:34,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:07:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:07:34,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 21:07:34,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:07:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:07:34,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150958738] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:07:34,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:07:34,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-05-21 21:07:34,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010867926] [2021-05-21 21:07:34,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 21:07:34,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:07:34,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 21:07:34,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-21 21:07:34,522 INFO L87 Difference]: Start difference. First operand 706666 states and 3293070 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)