/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 FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem10_label06.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 17:14:50,385 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 17:14:50,390 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 17:14:50,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 17:14:50,434 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 17:14:50,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 17:14:50,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 17:14:50,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 17:14:50,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 17:14:50,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 17:14:50,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 17:14:50,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 17:14:50,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 17:14:50,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 17:14:50,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 17:14:50,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 17:14:50,472 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 17:14:50,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 17:14:50,475 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 17:14:50,485 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 17:14:50,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 17:14:50,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 17:14:50,491 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 17:14:50,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 17:14:50,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 17:14:50,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 17:14:50,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 17:14:50,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 17:14:50,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 17:14:50,501 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 17:14:50,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 17:14:50,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 17:14:50,503 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 17:14:50,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 17:14:50,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 17:14:50,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 17:14:50,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 17:14:50,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 17:14:50,506 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 17:14:50,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 17:14:50,511 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 17:14:50,512 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 17:14:50,563 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 17:14:50,563 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 17:14:50,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 17:14:50,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 17:14:50,565 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 17:14:50,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 17:14:50,565 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 17:14:50,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 17:14:50,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 17:14:50,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 17:14:50,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 17:14:50,568 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 17:14:50,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 17:14:50,569 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 17:14:50,569 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 17:14:50,569 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 17:14:50,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 17:14:50,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 17:14:50,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 17:14:50,570 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 17:14:50,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 17:14:50,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 17:14:50,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 17:14:50,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 17:14:50,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 17:14:50,571 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 17:14:50,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 17:14:50,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 17:14:50,572 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 17:14:50,572 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true; [2020-09-24 17:14:51,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 17:14:51,064 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 17:14:51,070 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 17:14:51,073 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 17:14:51,073 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 17:14:51,075 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label06.c [2020-09-24 17:14:51,151 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c6c61993/1de3554076454a8ab761c1b47881f514/FLAG191798769 [2020-09-24 17:14:51,827 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 17:14:51,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem10_label06.c [2020-09-24 17:14:51,841 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c6c61993/1de3554076454a8ab761c1b47881f514/FLAG191798769 [2020-09-24 17:14:52,027 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c6c61993/1de3554076454a8ab761c1b47881f514 [2020-09-24 17:14:52,041 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 17:14:52,048 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 17:14:52,049 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 17:14:52,049 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 17:14:52,053 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 17:14:52,054 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:14:52" (1/1) ... [2020-09-24 17:14:52,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@697b2ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52, skipping insertion in model container [2020-09-24 17:14:52,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:14:52" (1/1) ... [2020-09-24 17:14:52,068 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 17:14:52,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 17:14:52,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:14:52,582 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 17:14:52,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 17:14:52,840 INFO L208 MainTranslator]: Completed translation [2020-09-24 17:14:52,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52 WrapperNode [2020-09-24 17:14:52,840 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 17:14:52,841 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 17:14:52,841 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 17:14:52,841 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 17:14:52,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (1/1) ... [2020-09-24 17:14:52,856 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (1/1) ... [2020-09-24 17:14:52,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (1/1) ... [2020-09-24 17:14:52,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (1/1) ... [2020-09-24 17:14:52,913 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (1/1) ... [2020-09-24 17:14:52,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (1/1) ... [2020-09-24 17:14:52,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (1/1) ... [2020-09-24 17:14:52,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 17:14:52,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 17:14:52,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 17:14:52,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 17:14:52,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-24 17:14:53,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 17:14:53,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 17:14:53,043 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-09-24 17:14:53,044 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 17:14:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-09-24 17:14:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 17:14:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 17:14:53,044 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-24 17:14:53,045 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 17:14:53,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 17:14:53,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 17:14:54,515 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 17:14:54,516 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 17:14:54,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:14:54 BoogieIcfgContainer [2020-09-24 17:14:54,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 17:14:54,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 17:14:54,535 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 17:14:54,539 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 17:14:54,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:14:52" (1/3) ... [2020-09-24 17:14:54,541 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6639092e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:14:54, skipping insertion in model container [2020-09-24 17:14:54,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:14:52" (2/3) ... [2020-09-24 17:14:54,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6639092e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:14:54, skipping insertion in model container [2020-09-24 17:14:54,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:14:54" (3/3) ... [2020-09-24 17:14:54,547 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label06.c [2020-09-24 17:14:54,561 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 17:14:54,576 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 17:14:54,604 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 17:14:54,649 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 17:14:54,650 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 17:14:54,650 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 17:14:54,650 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 17:14:54,650 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 17:14:54,650 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 17:14:54,651 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 17:14:54,651 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 17:14:54,691 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states. [2020-09-24 17:14:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 17:14:54,704 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:14:54,705 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:14:54,706 INFO L427 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:14:54,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:14:54,714 INFO L82 PathProgramCache]: Analyzing trace with hash -200720489, now seen corresponding path program 1 times [2020-09-24 17:14:54,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:14:54,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [390287377] [2020-09-24 17:14:54,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:14:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:14:54,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:14:55,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:14:55,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:14:56,022 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:14:56,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 17:14:56,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 17:14:56,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1132 [2020-09-24 17:14:56,025 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:14:56,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:14:56,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 17:14:56,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 17:14:56,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 17:14:56,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:14:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:14:56,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:14:56,165 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:14:56,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 17:14:56,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:14:56,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-24 17:14:56,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:14:56,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:14:56,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:14:56,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 17:14:56,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:14:56,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:14:56,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [390287377] [2020-09-24 17:14:56,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:14:56,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 17:14:56,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166555526] [2020-09-24 17:14:56,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 17:14:56,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:14:56,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 17:14:56,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 17:14:56,222 INFO L87 Difference]: Start difference. First operand 456 states. Second operand 4 states. [2020-09-24 17:14:58,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:14:58,289 INFO L93 Difference]: Finished difference Result 1069 states and 1495 transitions. [2020-09-24 17:14:58,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 17:14:58,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-09-24 17:14:58,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:14:58,316 INFO L225 Difference]: With dead ends: 1069 [2020-09-24 17:14:58,316 INFO L226 Difference]: Without dead ends: 555 [2020-09-24 17:14:58,328 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:14:58,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2020-09-24 17:14:58,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 543. [2020-09-24 17:14:58,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 543 states. [2020-09-24 17:14:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 670 transitions. [2020-09-24 17:14:58,429 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 670 transitions. Word has length 43 [2020-09-24 17:14:58,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:14:58,430 INFO L479 AbstractCegarLoop]: Abstraction has 543 states and 670 transitions. [2020-09-24 17:14:58,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 17:14:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 670 transitions. [2020-09-24 17:14:58,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-09-24 17:14:58,436 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:14:58,437 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:14:58,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 17:14:58,438 INFO L427 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:14:58,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:14:58,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1041597203, now seen corresponding path program 1 times [2020-09-24 17:14:58,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:14:58,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684263684] [2020-09-24 17:14:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:14:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:14:58,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:14:58,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:14:58,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:14:59,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:14:59,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:00,106 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:00,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-09-24 17:15:00,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 17:15:00,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1624 [2020-09-24 17:15:00,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:00,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:15:00,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:15:00,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-24 17:15:00,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:15:00,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:15:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:00,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:00,228 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:00,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 17:15:00,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:15:00,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-24 17:15:00,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:00,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:15:00,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:15:00,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 17:15:00,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-24 17:15:00,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 17:15:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:00,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:00,432 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:00,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 17:15:00,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:15:00,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 143 [2020-09-24 17:15:00,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:00,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:15:00,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 17:15:00,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-24 17:15:00,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-09-24 17:15:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:15:00,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684263684] [2020-09-24 17:15:00,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 17:15:00,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-24 17:15:00,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359570219] [2020-09-24 17:15:00,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 17:15:00,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:15:00,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 17:15:00,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 17:15:00,584 INFO L87 Difference]: Start difference. First operand 543 states and 670 transitions. Second operand 7 states. [2020-09-24 17:15:02,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:15:02,802 INFO L93 Difference]: Finished difference Result 1258 states and 1571 transitions. [2020-09-24 17:15:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 17:15:02,803 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 123 [2020-09-24 17:15:02,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:15:02,808 INFO L225 Difference]: With dead ends: 1258 [2020-09-24 17:15:02,809 INFO L226 Difference]: Without dead ends: 730 [2020-09-24 17:15:02,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-09-24 17:15:02,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2020-09-24 17:15:02,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 699. [2020-09-24 17:15:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 699 states. [2020-09-24 17:15:02,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 855 transitions. [2020-09-24 17:15:02,849 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 855 transitions. Word has length 123 [2020-09-24 17:15:02,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:15:02,850 INFO L479 AbstractCegarLoop]: Abstraction has 699 states and 855 transitions. [2020-09-24 17:15:02,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 17:15:02,850 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 855 transitions. [2020-09-24 17:15:02,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-09-24 17:15:02,853 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:15:02,854 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:15:02,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 17:15:02,854 INFO L427 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:15:02,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:15:02,855 INFO L82 PathProgramCache]: Analyzing trace with hash -203251606, now seen corresponding path program 1 times [2020-09-24 17:15:02,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:15:02,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920656959] [2020-09-24 17:15:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:15:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:02,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:03,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:03,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:03,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:05,665 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:05,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-09-24 17:15:05,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:15:05,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2760 [2020-09-24 17:15:05,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:05,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 17:15:05,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 17:15:05,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-09-24 17:15:05,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:15:05,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:15:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:05,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:05,826 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:05,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 17:15:05,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:15:05,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-24 17:15:05,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:05,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:15:05,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:15:05,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-09-24 17:15:05,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:15:05,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 17:15:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:05,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:06,143 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:06,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 17:15:06,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:15:06,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-09-24 17:15:06,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:06,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 17:15:06,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 17:15:06,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-09-24 17:15:06,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:15:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:15:06,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920656959] [2020-09-24 17:15:06,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:15:06,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 17:15:06,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769536103] [2020-09-24 17:15:06,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 17:15:06,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:15:06,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 17:15:06,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-24 17:15:06,313 INFO L87 Difference]: Start difference. First operand 699 states and 855 transitions. Second operand 12 states. [2020-09-24 17:15:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:15:09,639 INFO L93 Difference]: Finished difference Result 1440 states and 1874 transitions. [2020-09-24 17:15:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 17:15:09,640 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 132 [2020-09-24 17:15:09,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:15:09,655 INFO L225 Difference]: With dead ends: 1440 [2020-09-24 17:15:09,656 INFO L226 Difference]: Without dead ends: 873 [2020-09-24 17:15:09,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-24 17:15:09,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2020-09-24 17:15:09,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 736. [2020-09-24 17:15:09,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-09-24 17:15:09,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 892 transitions. [2020-09-24 17:15:09,738 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 892 transitions. Word has length 132 [2020-09-24 17:15:09,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:15:09,739 INFO L479 AbstractCegarLoop]: Abstraction has 736 states and 892 transitions. [2020-09-24 17:15:09,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 17:15:09,739 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 892 transitions. [2020-09-24 17:15:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-09-24 17:15:09,753 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:15:09,754 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:15:09,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 17:15:09,754 INFO L427 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:15:09,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:15:09,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1058703710, now seen corresponding path program 1 times [2020-09-24 17:15:09,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:15:09,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054511093] [2020-09-24 17:15:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:15:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:09,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:10,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:10,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:10,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:11,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:12,833 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:12,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-09-24 17:15:12,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 17:15:12,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3042 [2020-09-24 17:15:12,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:12,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 17:15:12,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 105 [2020-09-24 17:15:12,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-24 17:15:12,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:15:12,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:15:12,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:12,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:12,918 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:12,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 17:15:12,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:15:12,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 17:15:12,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:12,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:15:12,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:15:12,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:15:12,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:15:12,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 17:15:12,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:12,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:13,085 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:13,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-24 17:15:13,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:15:13,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 132 [2020-09-24 17:15:13,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:13,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 17:15:13,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:15:13,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-24 17:15:13,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:15:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:15:13,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054511093] [2020-09-24 17:15:13,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:15:13,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 17:15:13,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576603187] [2020-09-24 17:15:13,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:15:13,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:15:13,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:15:13,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:15:13,149 INFO L87 Difference]: Start difference. First operand 736 states and 892 transitions. Second operand 6 states. [2020-09-24 17:15:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:15:15,981 INFO L93 Difference]: Finished difference Result 1940 states and 2535 transitions. [2020-09-24 17:15:15,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 17:15:15,982 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2020-09-24 17:15:15,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:15:15,988 INFO L225 Difference]: With dead ends: 1940 [2020-09-24 17:15:15,988 INFO L226 Difference]: Without dead ends: 1404 [2020-09-24 17:15:15,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:15:15,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2020-09-24 17:15:16,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1355. [2020-09-24 17:15:16,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1355 states. [2020-09-24 17:15:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 1705 transitions. [2020-09-24 17:15:16,048 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 1705 transitions. Word has length 134 [2020-09-24 17:15:16,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:15:16,049 INFO L479 AbstractCegarLoop]: Abstraction has 1355 states and 1705 transitions. [2020-09-24 17:15:16,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:15:16,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 1705 transitions. [2020-09-24 17:15:16,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-09-24 17:15:16,054 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:15:16,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:15:16,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 17:15:16,055 INFO L427 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:15:16,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:15:16,056 INFO L82 PathProgramCache]: Analyzing trace with hash -591181850, now seen corresponding path program 1 times [2020-09-24 17:15:16,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:15:16,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934355918] [2020-09-24 17:15:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:15:16,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:16,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:16,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:16,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:16,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:16,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:19,377 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:19,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-09-24 17:15:19,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-24 17:15:19,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3276 [2020-09-24 17:15:19,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:19,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:15:19,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 139 [2020-09-24 17:15:19,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 17:15:19,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:15:19,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:15:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:19,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:19,466 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:19,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 17:15:19,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:15:19,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 17:15:19,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:19,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:15:19,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:15:19,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:15:19,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:15:19,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 17:15:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:19,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:19,645 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:19,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-09-24 17:15:19,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:15:19,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-09-24 17:15:19,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:19,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:15:19,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:15:19,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-09-24 17:15:19,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:15:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 17:15:19,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934355918] [2020-09-24 17:15:19,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:15:19,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 17:15:19,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823264293] [2020-09-24 17:15:19,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:15:19,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:15:19,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:15:19,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:15:19,708 INFO L87 Difference]: Start difference. First operand 1355 states and 1705 transitions. Second operand 5 states. [2020-09-24 17:15:21,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:15:21,245 INFO L93 Difference]: Finished difference Result 2816 states and 3660 transitions. [2020-09-24 17:15:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:15:21,246 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 165 [2020-09-24 17:15:21,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:15:21,256 INFO L225 Difference]: With dead ends: 2816 [2020-09-24 17:15:21,256 INFO L226 Difference]: Without dead ends: 1315 [2020-09-24 17:15:21,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:15:21,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2020-09-24 17:15:21,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1315. [2020-09-24 17:15:21,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1315 states. [2020-09-24 17:15:21,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1315 states to 1315 states and 1625 transitions. [2020-09-24 17:15:21,312 INFO L78 Accepts]: Start accepts. Automaton has 1315 states and 1625 transitions. Word has length 165 [2020-09-24 17:15:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:15:21,313 INFO L479 AbstractCegarLoop]: Abstraction has 1315 states and 1625 transitions. [2020-09-24 17:15:21,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:15:21,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1315 states and 1625 transitions. [2020-09-24 17:15:21,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-09-24 17:15:21,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:15:21,318 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:15:21,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 17:15:21,318 INFO L427 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:15:21,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:15:21,319 INFO L82 PathProgramCache]: Analyzing trace with hash -708481072, now seen corresponding path program 1 times [2020-09-24 17:15:21,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:15:21,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596889] [2020-09-24 17:15:21,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:15:21,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:21,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:21,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:22,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:22,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:26,520 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:26,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-09-24 17:15:26,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-09-24 17:15:26,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5171 [2020-09-24 17:15:26,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:26,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 17:15:26,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 100 [2020-09-24 17:15:26,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-09-24 17:15:26,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:15:26,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:15:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:26,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:26,602 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:26,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 17:15:26,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:15:26,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 17:15:26,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:26,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:15:26,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:15:26,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:15:26,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:15:26,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 17:15:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:26,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:26,725 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:26,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-24 17:15:26,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:15:26,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-09-24 17:15:26,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:26,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:15:26,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:15:26,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-09-24 17:15:26,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:15:26,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-09-24 17:15:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:26,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:26,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:26,920 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:26,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 17:15:26,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 17:15:26,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-09-24 17:15:26,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:26,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:15:26,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-09-24 17:15:26,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-09-24 17:15:26,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:15:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 98 proven. 23 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-09-24 17:15:27,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596889] [2020-09-24 17:15:27,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:15:27,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 17:15:27,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315922890] [2020-09-24 17:15:27,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 17:15:27,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:15:27,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 17:15:27,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:15:27,049 INFO L87 Difference]: Start difference. First operand 1315 states and 1625 transitions. Second operand 6 states. [2020-09-24 17:15:28,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:15:28,618 INFO L93 Difference]: Finished difference Result 2940 states and 3738 transitions. [2020-09-24 17:15:28,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 17:15:28,624 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 206 [2020-09-24 17:15:28,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:15:28,634 INFO L225 Difference]: With dead ends: 2940 [2020-09-24 17:15:28,634 INFO L226 Difference]: Without dead ends: 1798 [2020-09-24 17:15:28,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-24 17:15:28,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2020-09-24 17:15:28,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1766. [2020-09-24 17:15:28,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1766 states. [2020-09-24 17:15:28,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2127 transitions. [2020-09-24 17:15:28,693 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2127 transitions. Word has length 206 [2020-09-24 17:15:28,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:15:28,694 INFO L479 AbstractCegarLoop]: Abstraction has 1766 states and 2127 transitions. [2020-09-24 17:15:28,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 17:15:28,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2127 transitions. [2020-09-24 17:15:28,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-09-24 17:15:28,699 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:15:28,699 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:15:28,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 17:15:28,699 INFO L427 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:15:28,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:15:28,700 INFO L82 PathProgramCache]: Analyzing trace with hash -12142129, now seen corresponding path program 1 times [2020-09-24 17:15:28,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:15:28,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639300056] [2020-09-24 17:15:28,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:15:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:28,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:29,255 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:29,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-09-24 17:15:29,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:15:29,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 487 [2020-09-24 17:15:29,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:29,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 17:15:29,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 223 [2020-09-24 17:15:29,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 17:15:29,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:15:29,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 17:15:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:29,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:29,362 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:29,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-09-24 17:15:29,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:15:29,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 17:15:29,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:29,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:15:29,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:15:29,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:15:29,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:15:29,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 17:15:29,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:29,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:29,431 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:29,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-09-24 17:15:29,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:15:29,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-09-24 17:15:29,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:29,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 17:15:29,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:15:29,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 17:15:29,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 17:15:29,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2020-09-24 17:15:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:29,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:29,598 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 17:15:29,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 17:15:29,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 17:15:29,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-09-24 17:15:29,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: RANDOM [2020-09-24 17:15:29,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 17:15:29,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 17:15:29,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-24 17:15:29,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 17:15:29,673 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-09-24 17:15:29,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639300056] [2020-09-24 17:15:29,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 17:15:29,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 17:15:29,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956594662] [2020-09-24 17:15:29,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 17:15:29,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 17:15:29,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 17:15:29,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 17:15:29,675 INFO L87 Difference]: Start difference. First operand 1766 states and 2127 transitions. Second operand 5 states. [2020-09-24 17:15:31,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 17:15:31,451 INFO L93 Difference]: Finished difference Result 3807 states and 4722 transitions. [2020-09-24 17:15:31,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 17:15:31,452 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 247 [2020-09-24 17:15:31,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 17:15:31,463 INFO L225 Difference]: With dead ends: 3807 [2020-09-24 17:15:31,464 INFO L226 Difference]: Without dead ends: 2220 [2020-09-24 17:15:31,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-24 17:15:31,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2020-09-24 17:15:31,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 1918. [2020-09-24 17:15:31,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1918 states. [2020-09-24 17:15:31,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 2300 transitions. [2020-09-24 17:15:31,528 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 2300 transitions. Word has length 247 [2020-09-24 17:15:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 17:15:31,529 INFO L479 AbstractCegarLoop]: Abstraction has 1918 states and 2300 transitions. [2020-09-24 17:15:31,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 17:15:31,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 2300 transitions. [2020-09-24 17:15:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2020-09-24 17:15:31,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 17:15:31,542 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 17:15:31,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 17:15:31,543 INFO L427 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 17:15:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 17:15:31,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1251019352, now seen corresponding path program 1 times [2020-09-24 17:15:31,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 17:15:31,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112288294] [2020-09-24 17:15:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 17:15:31,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 17:15:31,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:31,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:31,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:33,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:34,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:34,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 17:15:38,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking...