/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/min-max-inc.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-22 02:40:22,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-22 02:40:22,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-22 02:40:22,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-22 02:40:22,120 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-22 02:40:22,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-22 02:40:22,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-22 02:40:22,122 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 02:40:22,157 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-22 02:40:22,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-22 02:40:22,157 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-22 02:40:22,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-22 02:40:22,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-22 02:40:22,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-22 02:40:22,160 INFO L138 SettingsManager]: * Use SBE=true [2021-05-22 02:40:22,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-22 02:40:22,160 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-22 02:40:22,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-22 02:40:22,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-22 02:40:22,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-22 02:40:22,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-22 02:40:22,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-22 02:40:22,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-22 02:40:22,162 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-22 02:40:22,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-22 02:40:22,162 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-22 02:40:22,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-22 02:40:22,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-22 02:40:22,162 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-22 02:40:22,163 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-22 02:40:22,163 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-22 02:40:22,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-22 02:40:22,163 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-22 02:40:22,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-22 02:40:22,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-22 02:40:22,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-22 02:40:22,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-22 02:40:22,164 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-22 02:40:22,164 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-22 02:40:22,164 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-05-22 02:40:22,164 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-22 02:40:22,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-22 02:40:22,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-22 02:40:22,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-22 02:40:22,516 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-22 02:40:22,524 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-22 02:40:22,525 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl [2021-05-22 02:40:22,525 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/min-max-inc.wvr.bpl' [2021-05-22 02:40:22,901 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-22 02:40:22,902 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-22 02:40:22,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-22 02:40:22,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-22 02:40:22,909 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-22 02:40:22,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:22" (1/1) ... [2021-05-22 02:40:22,927 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:22" (1/1) ... [2021-05-22 02:40:22,935 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-22 02:40:22,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-22 02:40:22,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-22 02:40:22,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-22 02:40:22,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:22" (1/1) ... [2021-05-22 02:40:22,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:22" (1/1) ... [2021-05-22 02:40:22,947 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:22" (1/1) ... [2021-05-22 02:40:22,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:22" (1/1) ... [2021-05-22 02:40:22,956 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:22" (1/1) ... [2021-05-22 02:40:22,960 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:22" (1/1) ... [2021-05-22 02:40:22,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:22" (1/1) ... [2021-05-22 02:40:22,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-22 02:40:22,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-22 02:40:22,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-22 02:40:22,968 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-22 02:40:22,969 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:22" (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 02:40:23,026 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-22 02:40:23,026 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-22 02:40:23,026 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-22 02:40:23,026 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-22 02:40:23,026 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-22 02:40:23,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-22 02:40:23,027 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-22 02:40:23,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-22 02:40:23,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-22 02:40:23,027 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-22 02:40:23,029 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-22 02:40:23,029 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-22 02:40:23,029 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-05-22 02:40:23,029 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-05-22 02:40:23,030 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-05-22 02:40:23,030 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 02:40:23,286 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-22 02:40:23,286 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-22 02:40:23,287 INFO L202 PluginConnector]: Adding new model min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:40:23 BoogieIcfgContainer [2021-05-22 02:40:23,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-22 02:40:23,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-22 02:40:23,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-22 02:40:23,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-22 02:40:23,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 22.05 02:40:22" (1/2) ... [2021-05-22 02:40:23,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79d33305 and model type min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.05 02:40:23, skipping insertion in model container [2021-05-22 02:40:23,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-max-inc.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.05 02:40:23" (2/2) ... [2021-05-22 02:40:23,294 INFO L111 eAbstractionObserver]: Analyzing ICFG min-max-inc.wvr.bpl [2021-05-22 02:40:23,299 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-22 02:40:23,299 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-22 02:40:23,299 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-22 02:40:23,300 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-22 02:40:23,377 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-05-22 02:40:23,412 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-22 02:40:23,453 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-22 02:40:23,453 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-22 02:40:23,453 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-22 02:40:23,453 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-22 02:40:23,453 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-22 02:40:23,454 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-22 02:40:23,454 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-22 02:40:23,454 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-22 02:40:23,466 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 35 transitions, 102 flow [2021-05-22 02:40:23,535 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 0 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 02:40:23,539 INFO L276 IsEmpty]: Start isEmpty. Operand has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 0 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 02:40:23,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:40:23,562 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:23,563 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:23,563 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:23,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:23,571 INFO L82 PathProgramCache]: Analyzing trace with hash -353370600, now seen corresponding path program 1 times [2021-05-22 02:40:23,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:23,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868342859] [2021-05-22 02:40:23,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:23,758 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 02:40:23,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:23,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868342859] [2021-05-22 02:40:23,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868342859] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:23,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:23,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:40:23,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515236732] [2021-05-22 02:40:23,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:40:23,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:23,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:40:23,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:40:23,780 INFO L87 Difference]: Start difference. First operand has 712 states, 710 states have (on average 3.6450704225352113) internal successors, (2588), 711 states have internal predecessors, (2588), 0 states have call successors, (0), 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 5.75) internal successors, (23), 3 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 02:40:23,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:23,854 INFO L93 Difference]: Finished difference Result 961 states and 3450 transitions. [2021-05-22 02:40:23,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:40:23,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 23 [2021-05-22 02:40:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:23,874 INFO L225 Difference]: With dead ends: 961 [2021-05-22 02:40:23,874 INFO L226 Difference]: Without dead ends: 614 [2021-05-22 02:40:23,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:23,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-05-22 02:40:23,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2021-05-22 02:40:23,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.592169657422512) internal successors, (2202), 613 states have internal predecessors, (2202), 0 states have call successors, (0), 0 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 02:40:23,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 2202 transitions. [2021-05-22 02:40:23,966 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 2202 transitions. Word has length 23 [2021-05-22 02:40:23,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:23,967 INFO L482 AbstractCegarLoop]: Abstraction has 614 states and 2202 transitions. [2021-05-22 02:40:23,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 02:40:23,968 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 2202 transitions. [2021-05-22 02:40:23,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:40:23,972 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:23,972 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:23,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-22 02:40:23,972 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:23,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:23,973 INFO L82 PathProgramCache]: Analyzing trace with hash 860248502, now seen corresponding path program 2 times [2021-05-22 02:40:23,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:23,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281235482] [2021-05-22 02:40:23,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:24,039 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 02:40:24,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:24,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281235482] [2021-05-22 02:40:24,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281235482] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:24,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:24,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:40:24,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595090410] [2021-05-22 02:40:24,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:40:24,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:24,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:40:24,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:24,043 INFO L87 Difference]: Start difference. First operand 614 states and 2202 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 02:40:24,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:24,178 INFO L93 Difference]: Finished difference Result 2435 states and 8733 transitions. [2021-05-22 02:40:24,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:40:24,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 23 [2021-05-22 02:40:24,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:24,193 INFO L225 Difference]: With dead ends: 2435 [2021-05-22 02:40:24,193 INFO L226 Difference]: Without dead ends: 1497 [2021-05-22 02:40:24,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:40:24,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2021-05-22 02:40:24,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 859. [2021-05-22 02:40:24,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.5442890442890445) internal successors, (3041), 858 states have internal predecessors, (3041), 0 states have call successors, (0), 0 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 02:40:24,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 3041 transitions. [2021-05-22 02:40:24,258 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 3041 transitions. Word has length 23 [2021-05-22 02:40:24,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:24,259 INFO L482 AbstractCegarLoop]: Abstraction has 859 states and 3041 transitions. [2021-05-22 02:40:24,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 02:40:24,259 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 3041 transitions. [2021-05-22 02:40:24,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:40:24,263 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:24,263 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:24,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-22 02:40:24,264 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:24,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:24,265 INFO L82 PathProgramCache]: Analyzing trace with hash 2060589364, now seen corresponding path program 3 times [2021-05-22 02:40:24,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:24,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430818123] [2021-05-22 02:40:24,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:24,316 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 02:40:24,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:24,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430818123] [2021-05-22 02:40:24,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430818123] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:24,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:24,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-22 02:40:24,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216865488] [2021-05-22 02:40:24,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-22 02:40:24,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:24,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-22 02:40:24,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:24,319 INFO L87 Difference]: Start difference. First operand 859 states and 3041 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 02:40:24,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:24,439 INFO L93 Difference]: Finished difference Result 3289 states and 11673 transitions. [2021-05-22 02:40:24,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-22 02:40:24,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 23 [2021-05-22 02:40:24,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:24,459 INFO L225 Difference]: With dead ends: 3289 [2021-05-22 02:40:24,464 INFO L226 Difference]: Without dead ends: 2391 [2021-05-22 02:40:24,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:40:24,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-05-22 02:40:24,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 910. [2021-05-22 02:40:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.553355335533553) internal successors, (3230), 909 states have internal predecessors, (3230), 0 states have call successors, (0), 0 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 02:40:24,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 3230 transitions. [2021-05-22 02:40:24,512 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 3230 transitions. Word has length 23 [2021-05-22 02:40:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:24,512 INFO L482 AbstractCegarLoop]: Abstraction has 910 states and 3230 transitions. [2021-05-22 02:40:24,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 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 02:40:24,512 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 3230 transitions. [2021-05-22 02:40:24,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-22 02:40:24,515 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:24,515 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] [2021-05-22 02:40:24,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-22 02:40:24,516 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:24,517 INFO L82 PathProgramCache]: Analyzing trace with hash -375854000, now seen corresponding path program 4 times [2021-05-22 02:40:24,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:24,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111653199] [2021-05-22 02:40:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:24,573 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 02:40:24,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:24,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111653199] [2021-05-22 02:40:24,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111653199] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:24,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:24,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:40:24,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314513436] [2021-05-22 02:40:24,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:40:24,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:24,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:40:24,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:40:24,577 INFO L87 Difference]: Start difference. First operand 910 states and 3230 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 02:40:24,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:24,599 INFO L93 Difference]: Finished difference Result 1081 states and 3814 transitions. [2021-05-22 02:40:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:40:24,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 23 [2021-05-22 02:40:24,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:24,605 INFO L225 Difference]: With dead ends: 1081 [2021-05-22 02:40:24,605 INFO L226 Difference]: Without dead ends: 830 [2021-05-22 02:40:24,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:24,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 830 states. [2021-05-22 02:40:24,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 830 to 830. [2021-05-22 02:40:24,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.4861278648974667) internal successors, (2890), 829 states have internal predecessors, (2890), 0 states have call successors, (0), 0 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 02:40:24,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2890 transitions. [2021-05-22 02:40:24,635 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2890 transitions. Word has length 23 [2021-05-22 02:40:24,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:24,636 INFO L482 AbstractCegarLoop]: Abstraction has 830 states and 2890 transitions. [2021-05-22 02:40:24,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 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 02:40:24,636 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2890 transitions. [2021-05-22 02:40:24,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:40:24,639 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:24,639 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] [2021-05-22 02:40:24,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-22 02:40:24,639 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:24,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:24,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1603494326, now seen corresponding path program 1 times [2021-05-22 02:40:24,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:24,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786586984] [2021-05-22 02:40:24,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:24,737 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 02:40:24,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:24,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786586984] [2021-05-22 02:40:24,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786586984] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:24,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312710219] [2021-05-22 02:40:24,738 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 02:40:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:24,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-22 02:40:24,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:24,938 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 02:40:24,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312710219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:24,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:40:24,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-22 02:40:24,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367309732] [2021-05-22 02:40:24,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:40:24,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:24,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:40:24,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:40:24,940 INFO L87 Difference]: Start difference. First operand 830 states and 2890 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:24,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:25,000 INFO L93 Difference]: Finished difference Result 1914 states and 6600 transitions. [2021-05-22 02:40:25,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:40:25,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:40:25,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:25,012 INFO L225 Difference]: With dead ends: 1914 [2021-05-22 02:40:25,012 INFO L226 Difference]: Without dead ends: 1914 [2021-05-22 02:40:25,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:40:25,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2021-05-22 02:40:25,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1087. [2021-05-22 02:40:25,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 3.603130755064457) internal successors, (3913), 1086 states have internal predecessors, (3913), 0 states have call successors, (0), 0 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 02:40:25,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3913 transitions. [2021-05-22 02:40:25,061 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3913 transitions. Word has length 25 [2021-05-22 02:40:25,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:25,062 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 3913 transitions. [2021-05-22 02:40:25,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:25,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3913 transitions. [2021-05-22 02:40:25,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:40:25,069 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:25,069 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:25,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:25,293 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:25,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:25,293 INFO L82 PathProgramCache]: Analyzing trace with hash 808417752, now seen corresponding path program 1 times [2021-05-22 02:40:25,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:25,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934370726] [2021-05-22 02:40:25,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:25,319 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 02:40:25,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:25,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934370726] [2021-05-22 02:40:25,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934370726] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:25,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:25,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:40:25,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630175688] [2021-05-22 02:40:25,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:40:25,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:25,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:40:25,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:40:25,321 INFO L87 Difference]: Start difference. First operand 1087 states and 3913 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:25,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:25,359 INFO L93 Difference]: Finished difference Result 1486 states and 5095 transitions. [2021-05-22 02:40:25,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:40:25,360 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:40:25,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:25,368 INFO L225 Difference]: With dead ends: 1486 [2021-05-22 02:40:25,368 INFO L226 Difference]: Without dead ends: 1456 [2021-05-22 02:40:25,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:25,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1456 states. [2021-05-22 02:40:25,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1456 to 1266. [2021-05-22 02:40:25,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.5177865612648223) internal successors, (4450), 1265 states have internal predecessors, (4450), 0 states have call successors, (0), 0 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 02:40:25,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4450 transitions. [2021-05-22 02:40:25,404 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4450 transitions. Word has length 25 [2021-05-22 02:40:25,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:25,405 INFO L482 AbstractCegarLoop]: Abstraction has 1266 states and 4450 transitions. [2021-05-22 02:40:25,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:25,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4450 transitions. [2021-05-22 02:40:25,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:40:25,408 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:25,408 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] [2021-05-22 02:40:25,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-22 02:40:25,409 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:25,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:25,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1237283624, now seen corresponding path program 1 times [2021-05-22 02:40:25,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:25,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142757282] [2021-05-22 02:40:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:25,453 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 02:40:25,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:25,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142757282] [2021-05-22 02:40:25,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142757282] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:25,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:25,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:40:25,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720321892] [2021-05-22 02:40:25,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:40:25,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:25,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:40:25,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:40:25,455 INFO L87 Difference]: Start difference. First operand 1266 states and 4450 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:25,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:25,503 INFO L93 Difference]: Finished difference Result 1766 states and 6108 transitions. [2021-05-22 02:40:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:40:25,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:40:25,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:25,513 INFO L225 Difference]: With dead ends: 1766 [2021-05-22 02:40:25,513 INFO L226 Difference]: Without dead ends: 1644 [2021-05-22 02:40:25,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:25,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-05-22 02:40:25,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1367. [2021-05-22 02:40:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1367 states, 1366 states have (on average 3.5439238653001466) internal successors, (4841), 1366 states have internal predecessors, (4841), 0 states have call successors, (0), 0 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 02:40:25,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1367 states to 1367 states and 4841 transitions. [2021-05-22 02:40:25,557 INFO L78 Accepts]: Start accepts. Automaton has 1367 states and 4841 transitions. Word has length 25 [2021-05-22 02:40:25,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:25,558 INFO L482 AbstractCegarLoop]: Abstraction has 1367 states and 4841 transitions. [2021-05-22 02:40:25,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:25,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1367 states and 4841 transitions. [2021-05-22 02:40:25,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:40:25,563 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:25,564 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] [2021-05-22 02:40:25,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-22 02:40:25,564 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:25,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:25,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1327684600, now seen corresponding path program 2 times [2021-05-22 02:40:25,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:25,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520544102] [2021-05-22 02:40:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:25,672 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 02:40:25,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:25,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520544102] [2021-05-22 02:40:25,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520544102] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:25,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710385809] [2021-05-22 02:40:25,673 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 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 02:40:25,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-22 02:40:25,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:40:25,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-22 02:40:25,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:25,799 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 02:40:25,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710385809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:25,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:40:25,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3] total 8 [2021-05-22 02:40:25,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053988838] [2021-05-22 02:40:25,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-22 02:40:25,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:25,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-22 02:40:25,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-22 02:40:25,807 INFO L87 Difference]: Start difference. First operand 1367 states and 4841 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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) [2021-05-22 02:40:26,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:26,658 INFO L93 Difference]: Finished difference Result 6173 states and 21367 transitions. [2021-05-22 02:40:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-22 02:40:26,659 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 25 [2021-05-22 02:40:26,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:26,677 INFO L225 Difference]: With dead ends: 6173 [2021-05-22 02:40:26,677 INFO L226 Difference]: Without dead ends: 3187 [2021-05-22 02:40:26,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 506.7ms TimeCoverageRelationStatistics Valid=523, Invalid=1733, Unknown=0, NotChecked=0, Total=2256 [2021-05-22 02:40:26,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3187 states. [2021-05-22 02:40:26,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3187 to 1397. [2021-05-22 02:40:26,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 3.4978510028653296) internal successors, (4883), 1396 states have internal predecessors, (4883), 0 states have call successors, (0), 0 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 02:40:26,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4883 transitions. [2021-05-22 02:40:26,737 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4883 transitions. Word has length 25 [2021-05-22 02:40:26,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:26,737 INFO L482 AbstractCegarLoop]: Abstraction has 1397 states and 4883 transitions. [2021-05-22 02:40:26,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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) [2021-05-22 02:40:26,738 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4883 transitions. [2021-05-22 02:40:26,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:40:26,741 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:26,741 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] [2021-05-22 02:40:26,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:26,965 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:26,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:26,965 INFO L82 PathProgramCache]: Analyzing trace with hash 566728726, now seen corresponding path program 2 times [2021-05-22 02:40:26,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:26,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257724910] [2021-05-22 02:40:26,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:27,004 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 02:40:27,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:27,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257724910] [2021-05-22 02:40:27,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257724910] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-22 02:40:27,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-22 02:40:27,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-22 02:40:27,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981067696] [2021-05-22 02:40:27,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-22 02:40:27,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:27,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-22 02:40:27,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-22 02:40:27,005 INFO L87 Difference]: Start difference. First operand 1397 states and 4883 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:27,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:27,051 INFO L93 Difference]: Finished difference Result 1523 states and 5204 transitions. [2021-05-22 02:40:27,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-22 02:40:27,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:40:27,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:27,065 INFO L225 Difference]: With dead ends: 1523 [2021-05-22 02:40:27,065 INFO L226 Difference]: Without dead ends: 1424 [2021-05-22 02:40:27,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-22 02:40:27,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-05-22 02:40:27,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1302. [2021-05-22 02:40:27,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.504227517294389) internal successors, (4559), 1301 states have internal predecessors, (4559), 0 states have call successors, (0), 0 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 02:40:27,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4559 transitions. [2021-05-22 02:40:27,099 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4559 transitions. Word has length 25 [2021-05-22 02:40:27,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:27,099 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4559 transitions. [2021-05-22 02:40:27,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:27,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4559 transitions. [2021-05-22 02:40:27,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-22 02:40:27,103 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:27,103 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] [2021-05-22 02:40:27,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-22 02:40:27,104 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:27,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1313441110, now seen corresponding path program 3 times [2021-05-22 02:40:27,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:27,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061065697] [2021-05-22 02:40:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:27,148 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 02:40:27,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:27,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061065697] [2021-05-22 02:40:27,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061065697] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:27,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278700756] [2021-05-22 02:40:27,149 INFO L93 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 [2021-05-22 02:40:27,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-22 02:40:27,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-22 02:40:27,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-22 02:40:27,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:27,251 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 02:40:27,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278700756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:27,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-22 02:40:27,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-05-22 02:40:27,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632364543] [2021-05-22 02:40:27,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-22 02:40:27,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-22 02:40:27,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-22 02:40:27,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-05-22 02:40:27,252 INFO L87 Difference]: Start difference. First operand 1302 states and 4559 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:27,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-22 02:40:27,301 INFO L93 Difference]: Finished difference Result 1384 states and 4841 transitions. [2021-05-22 02:40:27,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-22 02:40:27,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-22 02:40:27,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-22 02:40:27,306 INFO L225 Difference]: With dead ends: 1384 [2021-05-22 02:40:27,306 INFO L226 Difference]: Without dead ends: 1282 [2021-05-22 02:40:27,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-22 02:40:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1282 states. [2021-05-22 02:40:27,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1282 to 1044. [2021-05-22 02:40:27,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 3.5167785234899327) internal successors, (3668), 1043 states have internal predecessors, (3668), 0 states have call successors, (0), 0 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 02:40:27,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 3668 transitions. [2021-05-22 02:40:27,353 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 3668 transitions. Word has length 25 [2021-05-22 02:40:27,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-22 02:40:27,354 INFO L482 AbstractCegarLoop]: Abstraction has 1044 states and 3668 transitions. [2021-05-22 02:40:27,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-22 02:40:27,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 3668 transitions. [2021-05-22 02:40:27,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-22 02:40:27,358 INFO L513 BasicCegarLoop]: Found error trace [2021-05-22 02:40:27,358 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-22 02:40:27,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-22 02:40:27,577 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-22 02:40:27,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-22 02:40:27,577 INFO L82 PathProgramCache]: Analyzing trace with hash -873778054, now seen corresponding path program 1 times [2021-05-22 02:40:27,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-22 02:40:27,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055101262] [2021-05-22 02:40:27,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-22 02:40:27,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-22 02:40:27,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-22 02:40:27,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055101262] [2021-05-22 02:40:27,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055101262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-22 02:40:27,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932374927] [2021-05-22 02:40:27,752 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 [2021-05-22 02:40:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-22 02:40:27,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-22 02:40:27,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-22 02:40:27,869 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-22 02:40:28,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-22 02:40:28,070 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$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-22 02:40:28,072 INFO L168 Benchmark]: Toolchain (without parser) took 5170.45 ms. Allocated memory was 367.0 MB in the beginning and 511.7 MB in the end (delta: 144.7 MB). Free memory was 345.8 MB in the beginning and 437.1 MB in the end (delta: -91.3 MB). Peak memory consumption was 53.9 MB. Max. memory is 16.0 GB. [2021-05-22 02:40:28,073 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 367.0 MB. Free memory was 347.0 MB in the beginning and 347.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:40:28,073 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.29 ms. Allocated memory is still 367.0 MB. Free memory was 345.7 MB in the beginning and 344.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-22 02:40:28,073 INFO L168 Benchmark]: Boogie Preprocessor took 28.62 ms. Allocated memory is still 367.0 MB. Free memory was 344.3 MB in the beginning and 343.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:40:28,073 INFO L168 Benchmark]: RCFGBuilder took 321.29 ms. Allocated memory is still 367.0 MB. Free memory was 343.2 MB in the beginning and 329.4 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-05-22 02:40:28,073 INFO L168 Benchmark]: TraceAbstraction took 4782.79 ms. Allocated memory was 367.0 MB in the beginning and 511.7 MB in the end (delta: 144.7 MB). Free memory was 328.9 MB in the beginning and 437.1 MB in the end (delta: -108.2 MB). Peak memory consumption was 37.1 MB. Max. memory is 16.0 GB. [2021-05-22 02:40:28,074 INFO L339 ainManager$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 367.0 MB. Free memory was 347.0 MB in the beginning and 347.0 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.29 ms. Allocated memory is still 367.0 MB. Free memory was 345.7 MB in the beginning and 344.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 28.62 ms. Allocated memory is still 367.0 MB. Free memory was 344.3 MB in the beginning and 343.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 321.29 ms. Allocated memory is still 367.0 MB. Free memory was 343.2 MB in the beginning and 329.4 MB in the end (delta: 13.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 4782.79 ms. Allocated memory was 367.0 MB in the beginning and 511.7 MB in the end (delta: 144.7 MB). Free memory was 328.9 MB in the beginning and 437.1 MB in the end (delta: -108.2 MB). Peak memory consumption was 37.1 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...