/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:49:21,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:49:21,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:49:21,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:49:21,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-22 02:49:21,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-22 02:49:21,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-22 02:49:21,732 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-05-22 02:49:21,766 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:49:21,767 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:49:21,767 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:49:21,767 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:49:21,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:49:21,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:49:21,770 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:49:21,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:49:21,770 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:49:21,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:49:21,771 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:49:21,771 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:49:21,771 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:49:21,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:49:21,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:49:21,772 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:49:21,772 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:49:21,772 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:49:21,772 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:49:21,772 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:49:21,772 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:49:21,773 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:49:21,773 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:49:21,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:49:21,773 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:49:21,773 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:49:21,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:49:21,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:49:21,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:49:21,773 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:49:21,774 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:49:21,774 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:49:21,774 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:49:22,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:49:22,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:49:22,098 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:49:22,099 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:49:22,101 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:49:22,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl [2021-05-22 02:49:22,102 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl' [2021-05-22 02:49:22,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:49:22,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:49:22,219 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:49:22,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:49:22,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:49:22,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:22" (1/1) ... [2021-05-22 02:49:22,249 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:22" (1/1) ... [2021-05-22 02:49:22,255 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:49:22,256 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:49:22,257 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:49:22,257 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:49:22,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:22" (1/1) ... [2021-05-22 02:49:22,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:22" (1/1) ... [2021-05-22 02:49:22,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:22" (1/1) ... [2021-05-22 02:49:22,273 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:22" (1/1) ... [2021-05-22 02:49:22,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:22" (1/1) ... [2021-05-22 02:49:22,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:22" (1/1) ... [2021-05-22 02:49:22,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:22" (1/1) ... [2021-05-22 02:49:22,280 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:49:22,281 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:49:22,281 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:49:22,281 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:49:22,283 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:22" (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 [2021-05-22 02:49:22,341 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:49:22,341 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:49:22,342 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:49:22,342 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:49:22,342 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:49:22,342 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:49:22,342 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:49:22,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:49:22,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:49:22,343 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:49:22,343 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:49:22,343 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:49:22,344 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-22 02:49:22,745 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:49:22,745 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-22 02:49:22,746 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-05-22 02:49:22,746 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-05-22 02:49:22,746 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-05-22 02:49:22,747 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:49:22 BoogieIcfgContainer [2021-05-22 02:49:22,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:49:22,749 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:49:22,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:49:22,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:49:22,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:49:22" (1/2) ... [2021-05-22 02:49:22,761 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@600be188 and model type commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:49:22, skipping insertion in model container [2021-05-22 02:49:22,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:49:22" (2/2) ... [2021-05-22 02:49:22,763 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-1.wvr.bpl [2021-05-22 02:49:22,767 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:49:22,767 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:49:22,767 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:49:22,767 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:49:22,789 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-22 02:49:22,807 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:49:22,823 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:49:22,823 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:49:22,823 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:49:22,823 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:49:22,823 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:49:22,823 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:49:22,824 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:49:22,824 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:49:22,830 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 20 transitions, 64 flow [2021-05-22 02:49:22,839 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 27 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:22,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-22 02:49:22,845 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:22,845 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:22,846 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:22,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:22,850 INFO L82 PathProgramCache]: Analyzing trace with hash -628206710, now seen corresponding path program 1 times [2021-05-22 02:49:22,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:22,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143095476] [2021-05-22 02:49:22,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:22,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:22,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:22,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143095476] [2021-05-22 02:49:22,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143095476] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:49:22,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:49:22,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 02:49:22,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113149443] [2021-05-22 02:49:22,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:49:22,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:22,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:49:22,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:49:22,986 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 2.52) internal successors, (63), 26 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:23,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:23,021 INFO L93 Difference]: Finished difference Result 46 states and 118 transitions. [2021-05-22 02:49:23,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:49:23,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-22 02:49:23,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:23,032 INFO L225 Difference]: With dead ends: 46 [2021-05-22 02:49:23,032 INFO L226 Difference]: Without dead ends: 42 [2021-05-22 02:49:23,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:49:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-22 02:49:23,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-22 02:49:23,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.658536585365854) internal successors, (109), 41 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:23,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 109 transitions. [2021-05-22 02:49:23,069 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 109 transitions. Word has length 12 [2021-05-22 02:49:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:23,069 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 109 transitions. [2021-05-22 02:49:23,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:23,070 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 109 transitions. [2021-05-22 02:49:23,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:49:23,071 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:23,071 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:23,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:49:23,071 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:23,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:23,072 INFO L82 PathProgramCache]: Analyzing trace with hash 402586222, now seen corresponding path program 1 times [2021-05-22 02:49:23,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:23,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241498859] [2021-05-22 02:49:23,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:23,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:23,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:23,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241498859] [2021-05-22 02:49:23,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241498859] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:49:23,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:49:23,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 02:49:23,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411217154] [2021-05-22 02:49:23,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:49:23,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:23,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:49:23,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:49:23,120 INFO L87 Difference]: Start difference. First operand 42 states and 109 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:23,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:23,128 INFO L93 Difference]: Finished difference Result 59 states and 138 transitions. [2021-05-22 02:49:23,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:49:23,129 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-22 02:49:23,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:23,130 INFO L225 Difference]: With dead ends: 59 [2021-05-22 02:49:23,130 INFO L226 Difference]: Without dead ends: 57 [2021-05-22 02:49:23,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:49:23,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-22 02:49:23,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2021-05-22 02:49:23,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.5555555555555554) internal successors, (115), 45 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:23,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 115 transitions. [2021-05-22 02:49:23,139 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 115 transitions. Word has length 13 [2021-05-22 02:49:23,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:23,139 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 115 transitions. [2021-05-22 02:49:23,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:23,139 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 115 transitions. [2021-05-22 02:49:23,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:49:23,140 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:23,140 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:23,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:49:23,140 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:23,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1959261122, now seen corresponding path program 1 times [2021-05-22 02:49:23,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:23,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030064162] [2021-05-22 02:49:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:23,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:23,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030064162] [2021-05-22 02:49:23,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030064162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:23,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512032627] [2021-05-22 02:49:23,181 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 [2021-05-22 02:49:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:23,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-22 02:49:23,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:23,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512032627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:23,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:23,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-05-22 02:49:23,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042495689] [2021-05-22 02:49:23,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:49:23,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:23,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:49:23,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:49:23,343 INFO L87 Difference]: Start difference. First operand 46 states and 115 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:23,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:23,363 INFO L93 Difference]: Finished difference Result 65 states and 168 transitions. [2021-05-22 02:49:23,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:49:23,364 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-22 02:49:23,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:23,365 INFO L225 Difference]: With dead ends: 65 [2021-05-22 02:49:23,365 INFO L226 Difference]: Without dead ends: 59 [2021-05-22 02:49:23,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:49:23,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-22 02:49:23,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2021-05-22 02:49:23,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.7115384615384617) internal successors, (141), 52 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:23,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 141 transitions. [2021-05-22 02:49:23,373 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 141 transitions. Word has length 13 [2021-05-22 02:49:23,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:23,373 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 141 transitions. [2021-05-22 02:49:23,373 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:23,373 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 141 transitions. [2021-05-22 02:49:23,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-22 02:49:23,374 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:23,374 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:23,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-22 02:49:23,590 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:23,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:23,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1085270368, now seen corresponding path program 1 times [2021-05-22 02:49:23,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:23,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051007517] [2021-05-22 02:49:23,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:23,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:23,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051007517] [2021-05-22 02:49:23,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051007517] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:23,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592353311] [2021-05-22 02:49:23,670 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 [2021-05-22 02:49:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:23,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-22 02:49:23,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:23,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592353311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:23,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:23,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-05-22 02:49:23,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505296579] [2021-05-22 02:49:23,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:49:23,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:23,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:49:23,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:49:23,786 INFO L87 Difference]: Start difference. First operand 53 states and 141 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:23,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:23,810 INFO L93 Difference]: Finished difference Result 68 states and 170 transitions. [2021-05-22 02:49:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:49:23,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-22 02:49:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:23,814 INFO L225 Difference]: With dead ends: 68 [2021-05-22 02:49:23,815 INFO L226 Difference]: Without dead ends: 49 [2021-05-22 02:49:23,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:49:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-22 02:49:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-22 02:49:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.625) internal successors, (126), 48 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 126 transitions. [2021-05-22 02:49:23,827 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 126 transitions. Word has length 13 [2021-05-22 02:49:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:23,827 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 126 transitions. [2021-05-22 02:49:23,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:23,827 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 126 transitions. [2021-05-22 02:49:23,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:49:23,828 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:23,828 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:24,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:24,041 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:24,041 INFO L82 PathProgramCache]: Analyzing trace with hash -242961336, now seen corresponding path program 1 times [2021-05-22 02:49:24,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:24,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517362249] [2021-05-22 02:49:24,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:24,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:24,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:24,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517362249] [2021-05-22 02:49:24,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517362249] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:49:24,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:49:24,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-22 02:49:24,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263881023] [2021-05-22 02:49:24,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-22 02:49:24,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:24,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-22 02:49:24,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:49:24,072 INFO L87 Difference]: Start difference. First operand 49 states and 126 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:24,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:24,079 INFO L93 Difference]: Finished difference Result 29 states and 63 transitions. [2021-05-22 02:49:24,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-22 02:49:24,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:49:24,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:24,080 INFO L225 Difference]: With dead ends: 29 [2021-05-22 02:49:24,080 INFO L226 Difference]: Without dead ends: 28 [2021-05-22 02:49:24,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-22 02:49:24,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-22 02:49:24,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-22 02:49:24,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 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) [2021-05-22 02:49:24,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 62 transitions. [2021-05-22 02:49:24,083 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 62 transitions. Word has length 14 [2021-05-22 02:49:24,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:24,083 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 62 transitions. [2021-05-22 02:49:24,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:24,084 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 62 transitions. [2021-05-22 02:49:24,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-22 02:49:24,084 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:24,084 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:24,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-22 02:49:24,084 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:24,085 INFO L82 PathProgramCache]: Analyzing trace with hash -757524308, now seen corresponding path program 1 times [2021-05-22 02:49:24,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:24,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397360370] [2021-05-22 02:49:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:24,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:24,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397360370] [2021-05-22 02:49:24,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397360370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:24,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82687749] [2021-05-22 02:49:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:24,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-22 02:49:24,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:24,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82687749] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:24,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:24,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-05-22 02:49:24,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868650290] [2021-05-22 02:49:24,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-22 02:49:24,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:24,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-22 02:49:24,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:49:24,276 INFO L87 Difference]: Start difference. First operand 28 states and 62 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:24,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:24,324 INFO L93 Difference]: Finished difference Result 47 states and 113 transitions. [2021-05-22 02:49:24,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:49:24,324 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-22 02:49:24,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:24,325 INFO L225 Difference]: With dead ends: 47 [2021-05-22 02:49:24,326 INFO L226 Difference]: Without dead ends: 43 [2021-05-22 02:49:24,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-22 02:49:24,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-22 02:49:24,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-05-22 02:49:24,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.5121951219512195) internal successors, (103), 41 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 103 transitions. [2021-05-22 02:49:24,344 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 103 transitions. Word has length 14 [2021-05-22 02:49:24,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:24,344 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 103 transitions. [2021-05-22 02:49:24,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:24,344 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 103 transitions. [2021-05-22 02:49:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:49:24,345 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:24,345 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:24,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:24,561 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:24,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:24,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1436036254, now seen corresponding path program 1 times [2021-05-22 02:49:24,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:24,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738727265] [2021-05-22 02:49:24,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-22 02:49:24,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:24,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738727265] [2021-05-22 02:49:24,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738727265] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:49:24,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:49:24,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:49:24,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798972817] [2021-05-22 02:49:24,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:49:24,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:24,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:49:24,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:49:24,614 INFO L87 Difference]: Start difference. First operand 42 states and 103 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:24,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:24,624 INFO L93 Difference]: Finished difference Result 60 states and 135 transitions. [2021-05-22 02:49:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-22 02:49:24,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:49:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:24,626 INFO L225 Difference]: With dead ends: 60 [2021-05-22 02:49:24,626 INFO L226 Difference]: Without dead ends: 58 [2021-05-22 02:49:24,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:49:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-22 02:49:24,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2021-05-22 02:49:24,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2021-05-22 02:49:24,629 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 15 [2021-05-22 02:49:24,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:24,630 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2021-05-22 02:49:24,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:24,630 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2021-05-22 02:49:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:49:24,630 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:24,630 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:24,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:49:24,631 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:24,632 INFO L82 PathProgramCache]: Analyzing trace with hash -2049584416, now seen corresponding path program 2 times [2021-05-22 02:49:24,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:24,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621413222] [2021-05-22 02:49:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:24,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:24,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621413222] [2021-05-22 02:49:24,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621413222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:24,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823655414] [2021-05-22 02:49:24,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:49:24,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:49:24,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:24,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-22 02:49:24,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:24,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823655414] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:24,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:49:24,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-22 02:49:24,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913665643] [2021-05-22 02:49:24,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:49:24,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:49:24,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:49:24,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:49:24,850 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:49:24,926 INFO L93 Difference]: Finished difference Result 77 states and 188 transitions. [2021-05-22 02:49:24,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-22 02:49:24,926 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-22 02:49:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:49:24,927 INFO L225 Difference]: With dead ends: 77 [2021-05-22 02:49:24,927 INFO L226 Difference]: Without dead ends: 67 [2021-05-22 02:49:24,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-22 02:49:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-05-22 02:49:24,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-05-22 02:49:24,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.58) internal successors, (129), 50 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:24,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 129 transitions. [2021-05-22 02:49:24,931 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 129 transitions. Word has length 15 [2021-05-22 02:49:24,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:49:24,931 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 129 transitions. [2021-05-22 02:49:24,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:49:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 129 transitions. [2021-05-22 02:49:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-22 02:49:24,932 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:49:24,932 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:49:25,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:25,155 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:49:25,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:49:25,156 INFO L82 PathProgramCache]: Analyzing trace with hash 833536548, now seen corresponding path program 3 times [2021-05-22 02:49:25,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:49:25,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965773292] [2021-05-22 02:49:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:49:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:49:25,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:49:25,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:49:25,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965773292] [2021-05-22 02:49:25,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965773292] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:49:25,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319721381] [2021-05-22 02:49:25,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-22 02:49:25,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:49:25,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:49:25,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-22 02:49:25,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:49:25,353 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-22 02:49:25,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:49:25,569 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.derSimple(XnfDer.java:308) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate_EqInfoBased(XnfDer.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate(XnfDer.java:101) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-22 02:49:25,572 INFO L168 Benchmark]: Toolchain (without parser) took 3354.33 ms. Allocated memory is still 402.7 MB. Free memory was 381.5 MB in the beginning and 244.8 MB in the end (delta: 136.7 MB). Peak memory consumption was 138.3 MB. Max. memory is 16.0 GB. [2021-05-22 02:49:25,572 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 402.7 MB. Free memory was 382.8 MB in the beginning and 382.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:49:25,572 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.60 ms. Allocated memory is still 402.7 MB. Free memory was 381.4 MB in the beginning and 380.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:49:25,573 INFO L168 Benchmark]: Boogie Preprocessor took 23.89 ms. Allocated memory is still 402.7 MB. Free memory was 379.9 MB in the beginning and 378.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:49:25,573 INFO L168 Benchmark]: RCFGBuilder took 466.66 ms. Allocated memory is still 402.7 MB. Free memory was 378.8 MB in the beginning and 375.5 MB in the end (delta: 3.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 16.0 GB. [2021-05-22 02:49:25,573 INFO L168 Benchmark]: TraceAbstraction took 2822.86 ms. Allocated memory is still 402.7 MB. Free memory was 375.5 MB in the beginning and 244.8 MB in the end (delta: 130.7 MB). Peak memory consumption was 129.6 MB. Max. memory is 16.0 GB. [2021-05-22 02:49:25,574 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 402.7 MB. Free memory was 382.8 MB in the beginning and 382.7 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 36.60 ms. Allocated memory is still 402.7 MB. Free memory was 381.4 MB in the beginning and 380.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 23.89 ms. Allocated memory is still 402.7 MB. Free memory was 379.9 MB in the beginning and 378.9 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 466.66 ms. Allocated memory is still 402.7 MB. Free memory was 378.8 MB in the beginning and 375.5 MB in the end (delta: 3.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2822.86 ms. Allocated memory is still 402.7 MB. Free memory was 375.5 MB in the beginning and 244.8 MB in the end (delta: 130.7 MB). Peak memory consumption was 129.6 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...