/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy CAMEL_NO_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 21:31:28,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 21:31:28,574 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 21:31:28,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-19 21:31:28,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-19 21:31:28,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-19 21:31:28,595 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-19 21:31:28,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-19 21:31:28,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-19 21:31:28,608 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-19 21:31:28,609 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-19 21:31:28,610 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-19 21:31:28,610 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 21:31:28,611 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 21:31:28,613 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 21:31:28,614 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 21:31:28,615 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 21:31:28,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 21:31:28,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 21:31:28,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 21:31:28,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 21:31:28,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 21:31:28,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 21:31:28,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 21:31:28,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 21:31:28,652 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 21:31:28,653 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 21:31:28,654 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 21:31:28,655 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-19 21:31:28,679 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 21:31:28,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 21:31:28,681 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 21:31:28,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 21:31:28,682 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 21:31:28,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 21:31:28,683 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 21:31:28,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 21:31:28,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 21:31:28,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 21:31:28,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 21:31:28,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 21:31:28,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 21:31:28,690 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 21:31:28,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 21:31:28,690 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 21:31:28,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 21:31:28,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 21:31:28,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 21:31:28,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 21:31:28,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 21:31:28,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 21:31:28,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 21:31:28,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 21:31:28,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 21:31:28,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 21:31:28,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 21:31:28,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 21:31:28,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 21:31:28,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_NO_AM [2020-07-19 21:31:28,998 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 21:31:29,016 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 21:31:29,021 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 21:31:29,022 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 21:31:29,023 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 21:31:29,024 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-19 21:31:29,098 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8caf5a51/4269e68b86814964837c7034e6cf8574/FLAGbd69dc852 [2020-07-19 21:31:29,579 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 21:31:29,579 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-07-19 21:31:29,587 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8caf5a51/4269e68b86814964837c7034e6cf8574/FLAGbd69dc852 [2020-07-19 21:31:29,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b8caf5a51/4269e68b86814964837c7034e6cf8574 [2020-07-19 21:31:29,928 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 21:31:29,930 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 21:31:29,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 21:31:29,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 21:31:29,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 21:31:29,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:31:29" (1/1) ... [2020-07-19 21:31:29,938 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18c0d61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:29, skipping insertion in model container [2020-07-19 21:31:29,939 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:31:29" (1/1) ... [2020-07-19 21:31:29,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 21:31:29,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 21:31:30,172 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:31:30,180 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 21:31:30,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 21:31:30,213 INFO L208 MainTranslator]: Completed translation [2020-07-19 21:31:30,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:30 WrapperNode [2020-07-19 21:31:30,214 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 21:31:30,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 21:31:30,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 21:31:30,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 21:31:30,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:30" (1/1) ... [2020-07-19 21:31:30,318 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:30" (1/1) ... [2020-07-19 21:31:30,325 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:30" (1/1) ... [2020-07-19 21:31:30,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:30" (1/1) ... [2020-07-19 21:31:30,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:30" (1/1) ... [2020-07-19 21:31:30,337 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:30" (1/1) ... [2020-07-19 21:31:30,338 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:30" (1/1) ... [2020-07-19 21:31:30,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 21:31:30,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 21:31:30,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 21:31:30,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 21:31:30,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:30" (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 [2020-07-19 21:31:30,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 21:31:30,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 21:31:30,411 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-19 21:31:30,411 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 21:31:30,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 21:31:30,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-19 21:31:30,412 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-19 21:31:30,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-19 21:31:30,412 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 21:31:30,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-19 21:31:30,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-19 21:31:30,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-19 21:31:30,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 21:31:30,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 21:31:30,665 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 21:31:30,665 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-19 21:31:30,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:31:30 BoogieIcfgContainer [2020-07-19 21:31:30,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 21:31:30,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 21:31:30,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 21:31:30,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 21:31:30,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:31:29" (1/3) ... [2020-07-19 21:31:30,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c04203f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:31:30, skipping insertion in model container [2020-07-19 21:31:30,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:31:30" (2/3) ... [2020-07-19 21:31:30,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c04203f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:31:30, skipping insertion in model container [2020-07-19 21:31:30,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:31:30" (3/3) ... [2020-07-19 21:31:30,679 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-07-19 21:31:30,691 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 21:31:30,698 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 21:31:30,713 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 21:31:30,740 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 21:31:30,740 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 21:31:30,740 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 21:31:30,740 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 21:31:30,740 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 21:31:30,741 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 21:31:30,741 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 21:31:30,741 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 21:31:30,761 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-19 21:31:30,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-19 21:31:30,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:30,769 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:30,770 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:30,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:30,776 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2020-07-19 21:31:30,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:30,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927416642] [2020-07-19 21:31:30,787 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:30,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927416642] [2020-07-19 21:31:30,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:31:30,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-19 21:31:30,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545101353] [2020-07-19 21:31:30,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-19 21:31:30,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:30,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-19 21:31:30,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:31:30,993 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-07-19 21:31:31,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:31,077 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-07-19 21:31:31,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-19 21:31:31,079 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-07-19 21:31:31,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:31,089 INFO L225 Difference]: With dead ends: 42 [2020-07-19 21:31:31,089 INFO L226 Difference]: Without dead ends: 20 [2020-07-19 21:31:31,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-19 21:31:31,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-07-19 21:31:31,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-07-19 21:31:31,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-19 21:31:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-07-19 21:31:31,133 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-07-19 21:31:31,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:31,133 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-07-19 21:31:31,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-19 21:31:31,134 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-07-19 21:31:31,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-19 21:31:31,135 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:31,135 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:31,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 21:31:31,136 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:31,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:31,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2020-07-19 21:31:31,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:31,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423605587] [2020-07-19 21:31:31,137 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:31,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:31,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423605587] [2020-07-19 21:31:31,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 21:31:31,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-19 21:31:31,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353661635] [2020-07-19 21:31:31,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-19 21:31:31,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:31,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-19 21:31:31,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 21:31:31,233 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-07-19 21:31:31,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:31,302 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-07-19 21:31:31,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-19 21:31:31,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-07-19 21:31:31,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:31,304 INFO L225 Difference]: With dead ends: 34 [2020-07-19 21:31:31,304 INFO L226 Difference]: Without dead ends: 22 [2020-07-19 21:31:31,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-19 21:31:31,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-19 21:31:31,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-07-19 21:31:31,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 21:31:31,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-19 21:31:31,313 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-07-19 21:31:31,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:31,313 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-19 21:31:31,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-19 21:31:31,314 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-19 21:31:31,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-19 21:31:31,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:31,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:31,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-19 21:31:31,315 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:31,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:31,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2020-07-19 21:31:31,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:31,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536598620] [2020-07-19 21:31:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:31,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536598620] [2020-07-19 21:31:31,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077737979] [2020-07-19 21:31:31,395 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 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 [2020-07-19 21:31:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:31,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-19 21:31:31,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:31,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:31,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-07-19 21:31:31,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883033684] [2020-07-19 21:31:31,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-19 21:31:31,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:31,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-19 21:31:31,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:31:31,508 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 6 states. [2020-07-19 21:31:31,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:31,577 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-07-19 21:31:31,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 21:31:31,577 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-07-19 21:31:31,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:31,579 INFO L225 Difference]: With dead ends: 36 [2020-07-19 21:31:31,579 INFO L226 Difference]: Without dead ends: 24 [2020-07-19 21:31:31,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-19 21:31:31,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-19 21:31:31,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-07-19 21:31:31,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-19 21:31:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-19 21:31:31,586 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-07-19 21:31:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:31,587 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-19 21:31:31,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-19 21:31:31,587 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-19 21:31:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-19 21:31:31,588 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:31,588 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:31,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-19 21:31:31,802 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:31,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:31,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1739404943, now seen corresponding path program 2 times [2020-07-19 21:31:31,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:31,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509936949] [2020-07-19 21:31:31,805 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:31,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:31,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509936949] [2020-07-19 21:31:31,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654698240] [2020-07-19 21:31:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 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 [2020-07-19 21:31:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:31,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-19 21:31:31,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:32,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:32,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:32,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-07-19 21:31:32,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383358543] [2020-07-19 21:31:32,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 21:31:32,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:32,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 21:31:32,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:31:32,012 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-07-19 21:31:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:32,099 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-07-19 21:31:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 21:31:32,101 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-07-19 21:31:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:32,102 INFO L225 Difference]: With dead ends: 38 [2020-07-19 21:31:32,102 INFO L226 Difference]: Without dead ends: 26 [2020-07-19 21:31:32,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-19 21:31:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-19 21:31:32,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-07-19 21:31:32,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-19 21:31:32,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-07-19 21:31:32,113 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-07-19 21:31:32,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:32,113 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-07-19 21:31:32,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 21:31:32,115 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-07-19 21:31:32,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-19 21:31:32,117 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:32,117 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:32,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:32,331 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:32,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:32,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1328015311, now seen corresponding path program 3 times [2020-07-19 21:31:32,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:32,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981040032] [2020-07-19 21:31:32,333 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:32,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:32,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:32,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981040032] [2020-07-19 21:31:32,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720627703] [2020-07-19 21:31:32,467 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 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 [2020-07-19 21:31:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:32,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-19 21:31:32,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:32,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:32,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-07-19 21:31:32,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663960549] [2020-07-19 21:31:32,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 21:31:32,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:32,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 21:31:32,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:31:32,542 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 8 states. [2020-07-19 21:31:32,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:32,600 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-07-19 21:31:32,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 21:31:32,601 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-07-19 21:31:32,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:32,602 INFO L225 Difference]: With dead ends: 40 [2020-07-19 21:31:32,602 INFO L226 Difference]: Without dead ends: 28 [2020-07-19 21:31:32,603 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-19 21:31:32,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-19 21:31:32,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-07-19 21:31:32,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 21:31:32,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-19 21:31:32,608 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-07-19 21:31:32,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:32,608 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-19 21:31:32,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 21:31:32,609 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-19 21:31:32,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-19 21:31:32,610 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:32,610 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:32,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:32,823 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:32,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:32,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 4 times [2020-07-19 21:31:32,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:32,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782686371] [2020-07-19 21:31:32,825 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:32,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:32,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:32,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782686371] [2020-07-19 21:31:32,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708632731] [2020-07-19 21:31:32,938 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 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 [2020-07-19 21:31:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:32,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 21:31:32,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:33,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:33,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-07-19 21:31:33,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937155486] [2020-07-19 21:31:33,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 21:31:33,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:33,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 21:31:33,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:31:33,013 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-07-19 21:31:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:33,069 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-07-19 21:31:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 21:31:33,070 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-07-19 21:31:33,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:33,071 INFO L225 Difference]: With dead ends: 42 [2020-07-19 21:31:33,071 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 21:31:33,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-19 21:31:33,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 21:31:33,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-07-19 21:31:33,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-19 21:31:33,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-07-19 21:31:33,077 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-07-19 21:31:33,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:33,077 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-07-19 21:31:33,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 21:31:33,078 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-07-19 21:31:33,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-19 21:31:33,078 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:33,079 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:33,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:33,289 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:33,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:33,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1787714037, now seen corresponding path program 5 times [2020-07-19 21:31:33,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:33,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387981613] [2020-07-19 21:31:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:33,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:33,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:33,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:33,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387981613] [2020-07-19 21:31:33,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68275089] [2020-07-19 21:31:33,392 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:33,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-19 21:31:33,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:33,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:33,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-07-19 21:31:33,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048565139] [2020-07-19 21:31:33,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 21:31:33,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:33,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 21:31:33,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:31:33,471 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 10 states. [2020-07-19 21:31:33,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:33,562 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-07-19 21:31:33,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 21:31:33,562 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-07-19 21:31:33,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:33,563 INFO L225 Difference]: With dead ends: 44 [2020-07-19 21:31:33,563 INFO L226 Difference]: Without dead ends: 32 [2020-07-19 21:31:33,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-19 21:31:33,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-19 21:31:33,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-07-19 21:31:33,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-19 21:31:33,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-07-19 21:31:33,570 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-07-19 21:31:33,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:33,570 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-07-19 21:31:33,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 21:31:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-07-19 21:31:33,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-19 21:31:33,572 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:33,572 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:33,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-07-19 21:31:33,786 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:33,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:33,786 INFO L82 PathProgramCache]: Analyzing trace with hash 2147351063, now seen corresponding path program 6 times [2020-07-19 21:31:33,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:33,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746169851] [2020-07-19 21:31:33,787 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:33,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746169851] [2020-07-19 21:31:33,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930794302] [2020-07-19 21:31:33,923 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:33,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 21:31:33,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:34,017 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:34,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:34,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-07-19 21:31:34,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704278465] [2020-07-19 21:31:34,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 21:31:34,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:34,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 21:31:34,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:31:34,020 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 11 states. [2020-07-19 21:31:34,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:34,102 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-07-19 21:31:34,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 21:31:34,102 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-07-19 21:31:34,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:34,103 INFO L225 Difference]: With dead ends: 46 [2020-07-19 21:31:34,103 INFO L226 Difference]: Without dead ends: 34 [2020-07-19 21:31:34,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-19 21:31:34,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-19 21:31:34,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-07-19 21:31:34,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 21:31:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-19 21:31:34,109 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-07-19 21:31:34,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:34,110 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-19 21:31:34,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 21:31:34,110 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-19 21:31:34,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-19 21:31:34,111 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:34,111 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:34,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:34,318 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:34,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:34,320 INFO L82 PathProgramCache]: Analyzing trace with hash -133817927, now seen corresponding path program 7 times [2020-07-19 21:31:34,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:34,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366440517] [2020-07-19 21:31:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:34,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:34,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366440517] [2020-07-19 21:31:34,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577074046] [2020-07-19 21:31:34,441 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:34,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-19 21:31:34,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:34,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:34,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-07-19 21:31:34,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188884179] [2020-07-19 21:31:34,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 21:31:34,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:34,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 21:31:34,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:31:34,505 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-19 21:31:34,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:34,624 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-07-19 21:31:34,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 21:31:34,625 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-07-19 21:31:34,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:34,626 INFO L225 Difference]: With dead ends: 48 [2020-07-19 21:31:34,626 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 21:31:34,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-19 21:31:34,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 21:31:34,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-07-19 21:31:34,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-19 21:31:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-07-19 21:31:34,632 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-07-19 21:31:34,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:34,632 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-07-19 21:31:34,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 21:31:34,632 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-07-19 21:31:34,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-19 21:31:34,633 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:34,634 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:34,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:34,835 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:34,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:34,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1903896357, now seen corresponding path program 8 times [2020-07-19 21:31:34,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:34,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086402748] [2020-07-19 21:31:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:34,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:34,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086402748] [2020-07-19 21:31:34,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513011023] [2020-07-19 21:31:34,970 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:35,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 21:31:35,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:35,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:35,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-07-19 21:31:35,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670511384] [2020-07-19 21:31:35,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 21:31:35,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:35,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 21:31:35,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:31:35,061 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-07-19 21:31:35,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:35,139 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-07-19 21:31:35,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 21:31:35,139 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-07-19 21:31:35,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:35,140 INFO L225 Difference]: With dead ends: 50 [2020-07-19 21:31:35,140 INFO L226 Difference]: Without dead ends: 38 [2020-07-19 21:31:35,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-19 21:31:35,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-19 21:31:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-07-19 21:31:35,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-07-19 21:31:35,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-07-19 21:31:35,146 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-07-19 21:31:35,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:35,146 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-07-19 21:31:35,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 21:31:35,147 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-07-19 21:31:35,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-19 21:31:35,148 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:35,148 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:35,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-07-19 21:31:35,361 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:35,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:35,361 INFO L82 PathProgramCache]: Analyzing trace with hash -2142218371, now seen corresponding path program 9 times [2020-07-19 21:31:35,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:35,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770104429] [2020-07-19 21:31:35,362 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:35,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770104429] [2020-07-19 21:31:35,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502848687] [2020-07-19 21:31:35,485 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:35,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 11 conjunts are in the unsatisfiable core [2020-07-19 21:31:35,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:35,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:35,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-07-19 21:31:35,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120746568] [2020-07-19 21:31:35,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 21:31:35,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:35,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 21:31:35,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:31:35,556 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 14 states. [2020-07-19 21:31:35,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:35,682 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-07-19 21:31:35,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 21:31:35,682 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-07-19 21:31:35,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:35,683 INFO L225 Difference]: With dead ends: 52 [2020-07-19 21:31:35,683 INFO L226 Difference]: Without dead ends: 40 [2020-07-19 21:31:35,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-19 21:31:35,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-19 21:31:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-07-19 21:31:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-19 21:31:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-19 21:31:35,697 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-07-19 21:31:35,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:35,697 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-19 21:31:35,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 21:31:35,697 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-19 21:31:35,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-19 21:31:35,702 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:35,702 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:35,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:35,914 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:35,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:35,914 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 10 times [2020-07-19 21:31:35,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:35,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937331169] [2020-07-19 21:31:35,916 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:36,047 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:36,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937331169] [2020-07-19 21:31:36,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17862730] [2020-07-19 21:31:36,048 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:36,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 21:31:36,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:36,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:36,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-07-19 21:31:36,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148597926] [2020-07-19 21:31:36,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 21:31:36,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:36,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 21:31:36,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:31:36,132 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-07-19 21:31:36,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:36,233 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-07-19 21:31:36,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 21:31:36,234 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-07-19 21:31:36,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:36,235 INFO L225 Difference]: With dead ends: 54 [2020-07-19 21:31:36,235 INFO L226 Difference]: Without dead ends: 42 [2020-07-19 21:31:36,235 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-19 21:31:36,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-19 21:31:36,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-07-19 21:31:36,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-19 21:31:36,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-07-19 21:31:36,240 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-07-19 21:31:36,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:36,240 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-07-19 21:31:36,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 21:31:36,241 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-07-19 21:31:36,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-19 21:31:36,242 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:36,242 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:36,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:36,454 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:36,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:36,455 INFO L82 PathProgramCache]: Analyzing trace with hash 972952385, now seen corresponding path program 11 times [2020-07-19 21:31:36,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:36,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196700265] [2020-07-19 21:31:36,456 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:36,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:36,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196700265] [2020-07-19 21:31:36,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603987009] [2020-07-19 21:31:36,595 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:36,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-19 21:31:36,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:36,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:36,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2020-07-19 21:31:36,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752700632] [2020-07-19 21:31:36,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 21:31:36,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:36,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 21:31:36,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:31:36,669 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 16 states. [2020-07-19 21:31:36,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:36,767 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-07-19 21:31:36,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 21:31:36,768 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-07-19 21:31:36,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:36,769 INFO L225 Difference]: With dead ends: 56 [2020-07-19 21:31:36,769 INFO L226 Difference]: Without dead ends: 44 [2020-07-19 21:31:36,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-19 21:31:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-19 21:31:36,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-07-19 21:31:36,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-19 21:31:36,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-07-19 21:31:36,774 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-07-19 21:31:36,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:36,775 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-07-19 21:31:36,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 21:31:36,775 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-07-19 21:31:36,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-19 21:31:36,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:36,776 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:36,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-19 21:31:36,988 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:36,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:36,988 INFO L82 PathProgramCache]: Analyzing trace with hash 845451363, now seen corresponding path program 12 times [2020-07-19 21:31:36,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:36,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260951721] [2020-07-19 21:31:36,989 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:37,149 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:37,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260951721] [2020-07-19 21:31:37,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188914935] [2020-07-19 21:31:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:37,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 21:31:37,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:37,246 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:37,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:37,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2020-07-19 21:31:37,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080848907] [2020-07-19 21:31:37,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 21:31:37,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:37,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 21:31:37,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-07-19 21:31:37,249 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 17 states. [2020-07-19 21:31:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:37,366 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-07-19 21:31:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 21:31:37,367 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-07-19 21:31:37,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:37,368 INFO L225 Difference]: With dead ends: 58 [2020-07-19 21:31:37,369 INFO L226 Difference]: Without dead ends: 46 [2020-07-19 21:31:37,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-07-19 21:31:37,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-19 21:31:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-07-19 21:31:37,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-19 21:31:37,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-19 21:31:37,375 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-07-19 21:31:37,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:37,375 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-19 21:31:37,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 21:31:37,375 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-19 21:31:37,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-19 21:31:37,376 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:37,376 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:37,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 21:31:37,580 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:37,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:37,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1423946491, now seen corresponding path program 13 times [2020-07-19 21:31:37,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:37,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007161769] [2020-07-19 21:31:37,581 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:37,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007161769] [2020-07-19 21:31:37,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637400756] [2020-07-19 21:31:37,769 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:37,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-19 21:31:37,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:37,854 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:37,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:37,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2020-07-19 21:31:37,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135489688] [2020-07-19 21:31:37,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 21:31:37,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:37,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 21:31:37,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:31:37,856 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 18 states. [2020-07-19 21:31:37,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:37,958 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-07-19 21:31:37,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 21:31:37,959 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-07-19 21:31:37,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:37,960 INFO L225 Difference]: With dead ends: 60 [2020-07-19 21:31:37,960 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 21:31:37,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-19 21:31:37,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 21:31:37,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-07-19 21:31:37,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-07-19 21:31:37,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-07-19 21:31:37,965 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-07-19 21:31:37,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:37,966 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-07-19 21:31:37,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 21:31:37,966 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-07-19 21:31:37,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-07-19 21:31:37,967 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:37,967 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:38,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-07-19 21:31:38,177 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:38,178 INFO L82 PathProgramCache]: Analyzing trace with hash -471897817, now seen corresponding path program 14 times [2020-07-19 21:31:38,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:38,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119561969] [2020-07-19 21:31:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:38,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:38,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119561969] [2020-07-19 21:31:38,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933889482] [2020-07-19 21:31:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:38,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-19 21:31:38,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:38,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:38,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2020-07-19 21:31:38,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744375415] [2020-07-19 21:31:38,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 21:31:38,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:38,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 21:31:38,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:31:38,501 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 19 states. [2020-07-19 21:31:38,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:38,625 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-07-19 21:31:38,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 21:31:38,626 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-07-19 21:31:38,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:38,627 INFO L225 Difference]: With dead ends: 62 [2020-07-19 21:31:38,627 INFO L226 Difference]: Without dead ends: 50 [2020-07-19 21:31:38,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-19 21:31:38,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-19 21:31:38,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-07-19 21:31:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-19 21:31:38,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-07-19 21:31:38,642 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-07-19 21:31:38,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:38,642 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-07-19 21:31:38,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 21:31:38,642 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-07-19 21:31:38,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-19 21:31:38,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:38,643 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:38,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:38,845 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:38,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:38,846 INFO L82 PathProgramCache]: Analyzing trace with hash -381156151, now seen corresponding path program 15 times [2020-07-19 21:31:38,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:38,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709833943] [2020-07-19 21:31:38,854 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:38,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:39,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709833943] [2020-07-19 21:31:39,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127518980] [2020-07-19 21:31:39,069 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:39,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:39,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-19 21:31:39,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:39,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:39,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2020-07-19 21:31:39,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788590861] [2020-07-19 21:31:39,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 21:31:39,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:39,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 21:31:39,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:31:39,156 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 20 states. [2020-07-19 21:31:39,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:39,281 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-07-19 21:31:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 21:31:39,281 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-07-19 21:31:39,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:39,282 INFO L225 Difference]: With dead ends: 64 [2020-07-19 21:31:39,282 INFO L226 Difference]: Without dead ends: 52 [2020-07-19 21:31:39,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-19 21:31:39,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-19 21:31:39,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-07-19 21:31:39,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-19 21:31:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-19 21:31:39,287 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-07-19 21:31:39,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:39,287 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-19 21:31:39,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 21:31:39,288 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-19 21:31:39,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-07-19 21:31:39,288 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:39,288 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:39,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-19 21:31:39,490 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:39,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:39,490 INFO L82 PathProgramCache]: Analyzing trace with hash 922238955, now seen corresponding path program 16 times [2020-07-19 21:31:39,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:39,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226766951] [2020-07-19 21:31:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:39,714 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:39,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226766951] [2020-07-19 21:31:39,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984588544] [2020-07-19 21:31:39,715 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:39,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 21:31:39,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:39,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:39,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2020-07-19 21:31:39,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367159941] [2020-07-19 21:31:39,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 21:31:39,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:39,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 21:31:39,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:31:39,804 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 21 states. [2020-07-19 21:31:39,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:39,926 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-07-19 21:31:39,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 21:31:39,927 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-07-19 21:31:39,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:39,927 INFO L225 Difference]: With dead ends: 66 [2020-07-19 21:31:39,928 INFO L226 Difference]: Without dead ends: 54 [2020-07-19 21:31:39,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-19 21:31:39,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-19 21:31:39,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-07-19 21:31:39,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-19 21:31:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-07-19 21:31:39,933 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-07-19 21:31:39,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:39,933 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-07-19 21:31:39,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 21:31:39,933 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-07-19 21:31:39,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-19 21:31:39,934 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:39,934 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:40,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-19 21:31:40,146 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:40,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:40,147 INFO L82 PathProgramCache]: Analyzing trace with hash -645514611, now seen corresponding path program 17 times [2020-07-19 21:31:40,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:40,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054465302] [2020-07-19 21:31:40,147 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:40,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054465302] [2020-07-19 21:31:40,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697601700] [2020-07-19 21:31:40,374 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:40,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-19 21:31:40,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:40,459 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:40,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:40,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2020-07-19 21:31:40,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920878524] [2020-07-19 21:31:40,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 21:31:40,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:40,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 21:31:40,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:31:40,463 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 22 states. [2020-07-19 21:31:40,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:40,560 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-07-19 21:31:40,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 21:31:40,561 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-07-19 21:31:40,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:40,561 INFO L225 Difference]: With dead ends: 68 [2020-07-19 21:31:40,562 INFO L226 Difference]: Without dead ends: 56 [2020-07-19 21:31:40,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-19 21:31:40,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-07-19 21:31:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-07-19 21:31:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-19 21:31:40,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-07-19 21:31:40,568 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-07-19 21:31:40,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:40,569 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-07-19 21:31:40,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 21:31:40,569 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-07-19 21:31:40,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-19 21:31:40,570 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:40,570 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:40,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:40,771 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:40,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:40,771 INFO L82 PathProgramCache]: Analyzing trace with hash 276829359, now seen corresponding path program 18 times [2020-07-19 21:31:40,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:40,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186637675] [2020-07-19 21:31:40,772 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:41,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186637675] [2020-07-19 21:31:41,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324986540] [2020-07-19 21:31:41,045 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:41,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 21:31:41,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:41,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:41,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2020-07-19 21:31:41,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432284976] [2020-07-19 21:31:41,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-19 21:31:41,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:41,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-19 21:31:41,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-19 21:31:41,153 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 23 states. [2020-07-19 21:31:41,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:41,264 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-07-19 21:31:41,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 21:31:41,265 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-07-19 21:31:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:41,265 INFO L225 Difference]: With dead ends: 70 [2020-07-19 21:31:41,265 INFO L226 Difference]: Without dead ends: 58 [2020-07-19 21:31:41,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-19 21:31:41,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-19 21:31:41,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-07-19 21:31:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 21:31:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-19 21:31:41,270 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-07-19 21:31:41,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:41,271 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-19 21:31:41,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-19 21:31:41,271 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-19 21:31:41,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-19 21:31:41,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:41,272 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:41,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:41,481 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:41,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:41,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1886121553, now seen corresponding path program 19 times [2020-07-19 21:31:41,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:41,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916606485] [2020-07-19 21:31:41,482 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:41,811 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:41,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916606485] [2020-07-19 21:31:41,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733053750] [2020-07-19 21:31:41,811 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 21:31:41,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-19 21:31:41,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 21:31:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 21:31:41,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 21:31:41,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2020-07-19 21:31:41,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384228556] [2020-07-19 21:31:41,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-19 21:31:41,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_NO_AM [2020-07-19 21:31:41,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-19 21:31:41,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:31:41,930 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 24 states. [2020-07-19 21:31:42,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 21:31:42,066 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-07-19 21:31:42,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 21:31:42,066 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-07-19 21:31:42,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 21:31:42,068 INFO L225 Difference]: With dead ends: 71 [2020-07-19 21:31:42,068 INFO L226 Difference]: Without dead ends: 59 [2020-07-19 21:31:42,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-19 21:31:42,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-07-19 21:31:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-07-19 21:31:42,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-07-19 21:31:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-07-19 21:31:42,073 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-07-19 21:31:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 21:31:42,074 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-07-19 21:31:42,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-19 21:31:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-07-19 21:31:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-19 21:31:42,075 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 21:31:42,076 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 21:31:42,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 21:31:42,288 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 21:31:42,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 21:31:42,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2067273869, now seen corresponding path program 20 times [2020-07-19 21:31:42,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_NO_AM [2020-07-19 21:31:42,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901864383] [2020-07-19 21:31:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1ad1efa9 [2020-07-19 21:31:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:31:42,391 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:31:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 21:31:42,475 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 21:31:42,526 INFO L174 FreeRefinementEngine]: Strategy CAMEL_NO_AM found a feasible trace [2020-07-19 21:31:42,526 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 21:31:42,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-19 21:31:42,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:31:42 BoogieIcfgContainer [2020-07-19 21:31:42,594 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 21:31:42,597 INFO L168 Benchmark]: Toolchain (without parser) took 12666.69 ms. Allocated memory was 148.4 MB in the beginning and 299.9 MB in the end (delta: 151.5 MB). Free memory was 106.3 MB in the beginning and 105.7 MB in the end (delta: 599.6 kB). Peak memory consumption was 152.1 MB. Max. memory is 7.1 GB. [2020-07-19 21:31:42,598 INFO L168 Benchmark]: CDTParser took 1.10 ms. Allocated memory is still 148.4 MB. Free memory was 124.6 MB in the beginning and 124.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-19 21:31:42,598 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.53 ms. Allocated memory is still 148.4 MB. Free memory was 105.8 MB in the beginning and 95.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-19 21:31:42,599 INFO L168 Benchmark]: Boogie Preprocessor took 126.21 ms. Allocated memory was 148.4 MB in the beginning and 203.9 MB in the end (delta: 55.6 MB). Free memory was 95.5 MB in the beginning and 181.6 MB in the end (delta: -86.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-19 21:31:42,599 INFO L168 Benchmark]: RCFGBuilder took 329.27 ms. Allocated memory is still 203.9 MB. Free memory was 181.6 MB in the beginning and 166.4 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. [2020-07-19 21:31:42,600 INFO L168 Benchmark]: TraceAbstraction took 11922.60 ms. Allocated memory was 203.9 MB in the beginning and 299.9 MB in the end (delta: 95.9 MB). Free memory was 165.8 MB in the beginning and 105.7 MB in the end (delta: 60.1 MB). Peak memory consumption was 156.1 MB. Max. memory is 7.1 GB. [2020-07-19 21:31:42,603 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.10 ms. Allocated memory is still 148.4 MB. Free memory was 124.6 MB in the beginning and 124.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 282.53 ms. Allocated memory is still 148.4 MB. Free memory was 105.8 MB in the beginning and 95.5 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.21 ms. Allocated memory was 148.4 MB in the beginning and 203.9 MB in the end (delta: 55.6 MB). Free memory was 95.5 MB in the beginning and 181.6 MB in the end (delta: -86.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 329.27 ms. Allocated memory is still 203.9 MB. Free memory was 181.6 MB in the beginning and 166.4 MB in the end (delta: 15.2 MB). Peak memory consumption was 15.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 11922.60 ms. Allocated memory was 203.9 MB in the beginning and 299.9 MB in the end (delta: 95.9 MB). Free memory was 165.8 MB in the beginning and 105.7 MB in the end (delta: 60.1 MB). Peak memory consumption was 156.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 VAL [ad1={2:0}, j=0] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=1] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=2] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=3] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=4] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=5] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=6] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=7] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=8] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=9] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=10] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=11] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=12] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=13] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=14] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=15] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=16] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=17] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=18] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=19] [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ VAL [ad1={2:0}, j=20] [L17] COND FALSE !(j<20) VAL [ad1={2:0}, j=20] [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) VAL [\read(*pa)=0, ad1={2:0}, ad2={2:0}, i=10, j=20, pa={2:0}] [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) VAL [\old(b)=10, ad1={2:0}] [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) VAL [ad1={2:0}, ad2={2:0}, check(ad1, i)=0, i=10, j=20, pa={2:0}] [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() VAL [ad1={2:0}, ad2={2:0}, i=10, j=20, pa={2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.7s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 365 SDtfs, 252 SDslu, 2032 SDs, 0 SdLazy, 1389 SolverSat, 70 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1039 GetRequests, 789 SyntacticMatches, 0 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 3.4s InterpolantComputationTime, 1537 NumberOfCodeBlocks, 1537 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 1439 ConstructedInterpolants, 0 QuantifiedInterpolants, 131957 SizeOfPredicates, 19 NumberOfNonLiveVariables, 3097 ConjunctsInSsa, 228 ConjunctsInUnsatCore, 40 InterpolantComputations, 2 PerfectInterpolantSequences, 0/4940 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...