/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 SequenceOfStatements --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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:10:42,752 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:10:42,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:10:42,778 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:10:42,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:10:42,780 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:10:42,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:10:42,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:10:42,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:10:42,785 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:10:42,786 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:10:42,787 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:10:42,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:10:42,788 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:10:42,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:10:42,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:10:42,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:10:42,792 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:10:42,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:10:42,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:10:42,800 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:10:42,801 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:10:42,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:10:42,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:10:42,811 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:10:42,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:10:42,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:10:42,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:10:42,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:10:42,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:10:42,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:10:42,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:10:42,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:10:42,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:10:42,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:10:42,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:10:42,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:10:42,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:10:42,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:10:42,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:10:42,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:10:42,824 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 [2020-10-12 19:10:42,869 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:10:42,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:10:42,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:10:42,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:10:42,871 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:10:42,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:10:42,872 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:10:42,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:10:42,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:10:42,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:10:42,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:10:42,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:10:42,874 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:10:42,874 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:10:42,874 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:10:42,875 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:10:42,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:10:42,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:10:42,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:10:42,875 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:10:42,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:10:42,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:10:42,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:10:42,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:10:42,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:10:42,877 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:10:42,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:10:42,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:10:42,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:10:42,877 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 -> SequenceOfStatements 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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:10:43,178 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:10:43,189 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:10:43,193 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:10:43,194 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:10:43,194 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:10:43,195 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:10:43,249 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/270ae52c6/9458d33162894b709fd35fd6085f1dc7/FLAGe808fac91 [2020-10-12 19:10:43,720 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:10:43,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:10:43,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/270ae52c6/9458d33162894b709fd35fd6085f1dc7/FLAGe808fac91 [2020-10-12 19:10:44,070 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/270ae52c6/9458d33162894b709fd35fd6085f1dc7 [2020-10-12 19:10:44,078 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:10:44,079 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:10:44,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:10:44,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:10:44,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:10:44,087 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:10:44" (1/1) ... [2020-10-12 19:10:44,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d9acc90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:44, skipping insertion in model container [2020-10-12 19:10:44,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:10:44" (1/1) ... [2020-10-12 19:10:44,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:10:44,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:10:44,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:10:44,555 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:10:44,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:10:44,650 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:10:44,650 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:44 WrapperNode [2020-10-12 19:10:44,650 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:10:44,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:10:44,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:10:44,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:10:44,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:44" (1/1) ... [2020-10-12 19:10:44,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:44" (1/1) ... [2020-10-12 19:10:44,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:44" (1/1) ... [2020-10-12 19:10:44,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:44" (1/1) ... [2020-10-12 19:10:44,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:44" (1/1) ... [2020-10-12 19:10:44,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:44" (1/1) ... [2020-10-12 19:10:44,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:44" (1/1) ... [2020-10-12 19:10:44,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:10:44,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:10:44,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:10:44,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:10:44,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:44" (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 [2020-10-12 19:10:44,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:10:44,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:10:44,781 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:10:44,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:10:44,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:10:44,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:10:44,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 19:10:44,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:10:44,783 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:10:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:10:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:10:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:10:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:10:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:10:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:10:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:10:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:10:44,786 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:10:44,786 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:10:44,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:10:44,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:10:45,482 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:10:45,483 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:10:45,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:10:45 BoogieIcfgContainer [2020-10-12 19:10:45,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:10:45,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:10:45,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:10:45,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:10:45,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:10:44" (1/3) ... [2020-10-12 19:10:45,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b85c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:10:45, skipping insertion in model container [2020-10-12 19:10:45,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:44" (2/3) ... [2020-10-12 19:10:45,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53b85c21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:10:45, skipping insertion in model container [2020-10-12 19:10:45,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:10:45" (3/3) ... [2020-10-12 19:10:45,497 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:10:45,507 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:10:45,514 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:10:45,528 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:10:45,559 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:10:45,559 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:10:45,559 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:10:45,560 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:10:45,560 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:10:45,560 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:10:45,560 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:10:45,560 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:10:45,587 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states. [2020-10-12 19:10:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 19:10:45,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:10:45,606 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:10:45,607 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:10:45,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:10:45,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1611542725, now seen corresponding path program 1 times [2020-10-12 19:10:45,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:10:45,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440578363] [2020-10-12 19:10:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:10:46,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:46,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:46,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:46,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:46,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:48,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:48,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 19:10:48,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:10:48,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2269 [2020-10-12 19:10:48,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:48,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:10:48,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:10:48,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 19:10:48,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 19:10:48,653 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:10:48,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:10:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:48,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:48,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:48,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:10:48,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:10:48,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 19:10:48,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:48,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:10:48,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:10:48,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:10:48,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:10:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:10:48,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440578363] [2020-10-12 19:10:48,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:10:48,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:10:48,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80390387] [2020-10-12 19:10:48,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:10:48,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:10:48,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:10:48,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:10:48,727 INFO L87 Difference]: Start difference. First operand 145 states. Second operand 6 states. [2020-10-12 19:10:48,989 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-12 19:10:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:10:49,835 INFO L93 Difference]: Finished difference Result 659 states and 1106 transitions. [2020-10-12 19:10:49,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:10:49,837 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-12 19:10:49,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:10:49,858 INFO L225 Difference]: With dead ends: 659 [2020-10-12 19:10:49,858 INFO L226 Difference]: Without dead ends: 556 [2020-10-12 19:10:49,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:10:49,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-10-12 19:10:49,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 222. [2020-10-12 19:10:49,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-12 19:10:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 353 transitions. [2020-10-12 19:10:49,970 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 353 transitions. Word has length 60 [2020-10-12 19:10:49,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:10:49,974 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 353 transitions. [2020-10-12 19:10:49,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:10:49,975 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 353 transitions. [2020-10-12 19:10:49,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 19:10:49,981 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:10:49,981 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:10:49,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:10:49,982 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:10:49,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:10:49,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1643393529, now seen corresponding path program 1 times [2020-10-12 19:10:49,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:10:49,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107053292] [2020-10-12 19:10:49,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:10:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:50,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:50,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:50,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:50,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:50,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:52,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:52,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 19:10:52,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:10:52,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2472 [2020-10-12 19:10:52,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:52,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:10:52,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 19:10:52,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 19:10:52,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 19:10:52,739 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:10:52,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:10:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:52,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:52,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:52,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:10:52,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:10:52,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:10:52,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:52,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:10:52,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:10:52,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:10:52,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:10:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:10:52,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107053292] [2020-10-12 19:10:52,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:10:52,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:10:52,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702772587] [2020-10-12 19:10:52,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:10:52,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:10:52,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:10:52,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:10:52,777 INFO L87 Difference]: Start difference. First operand 222 states and 353 transitions. Second operand 7 states. [2020-10-12 19:10:52,986 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-12 19:10:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:10:54,134 INFO L93 Difference]: Finished difference Result 1378 states and 2286 transitions. [2020-10-12 19:10:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:10:54,135 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2020-10-12 19:10:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:10:54,143 INFO L225 Difference]: With dead ends: 1378 [2020-10-12 19:10:54,144 INFO L226 Difference]: Without dead ends: 1214 [2020-10-12 19:10:54,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:10:54,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2020-10-12 19:10:54,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 645. [2020-10-12 19:10:54,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2020-10-12 19:10:54,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 1062 transitions. [2020-10-12 19:10:54,209 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 1062 transitions. Word has length 61 [2020-10-12 19:10:54,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:10:54,210 INFO L479 AbstractCegarLoop]: Abstraction has 645 states and 1062 transitions. [2020-10-12 19:10:54,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:10:54,210 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 1062 transitions. [2020-10-12 19:10:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 19:10:54,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:10:54,214 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:10:54,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:10:54,214 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:10:54,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:10:54,214 INFO L82 PathProgramCache]: Analyzing trace with hash 537355724, now seen corresponding path program 1 times [2020-10-12 19:10:54,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:10:54,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591150137] [2020-10-12 19:10:54,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:10:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:54,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:54,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:54,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:54,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:54,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:56,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:56,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 19:10:56,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:10:56,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2031 [2020-10-12 19:10:56,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:56,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:10:56,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:10:56,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 19:10:56,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:10:56,485 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:10:56,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:10:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:56,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:56,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:56,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:10:56,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:10:56,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:10:56,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:56,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:10:56,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:10:56,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:10:56,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:10:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:10:56,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591150137] [2020-10-12 19:10:56,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:10:56,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:10:56,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14334133] [2020-10-12 19:10:56,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:10:56,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:10:56,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:10:56,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:10:56,520 INFO L87 Difference]: Start difference. First operand 645 states and 1062 transitions. Second operand 7 states. [2020-10-12 19:10:56,715 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-12 19:10:57,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:10:57,950 INFO L93 Difference]: Finished difference Result 3961 states and 6593 transitions. [2020-10-12 19:10:57,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:10:57,950 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-10-12 19:10:57,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:10:57,971 INFO L225 Difference]: With dead ends: 3961 [2020-10-12 19:10:57,972 INFO L226 Difference]: Without dead ends: 3426 [2020-10-12 19:10:57,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:10:57,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3426 states. [2020-10-12 19:10:58,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3426 to 1851. [2020-10-12 19:10:58,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1851 states. [2020-10-12 19:10:58,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1851 states to 1851 states and 3069 transitions. [2020-10-12 19:10:58,150 INFO L78 Accepts]: Start accepts. Automaton has 1851 states and 3069 transitions. Word has length 62 [2020-10-12 19:10:58,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:10:58,150 INFO L479 AbstractCegarLoop]: Abstraction has 1851 states and 3069 transitions. [2020-10-12 19:10:58,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:10:58,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1851 states and 3069 transitions. [2020-10-12 19:10:58,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 19:10:58,156 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:10:58,156 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:10:58,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:10:58,157 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:10:58,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:10:58,158 INFO L82 PathProgramCache]: Analyzing trace with hash -574336146, now seen corresponding path program 1 times [2020-10-12 19:10:58,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:10:58,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539123217] [2020-10-12 19:10:58,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:10:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:58,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:58,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:58,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:58,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:58,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:00,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:00,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 19:11:00,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:11:00,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1888 [2020-10-12 19:11:00,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:00,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:11:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:11:00,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 19:11:00,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:11:00,360 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:11:00,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:11:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:00,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:00,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:00,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:11:00,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:11:00,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 19:11:00,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:00,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:11:00,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:11:00,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:11:00,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:11:00,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539123217] [2020-10-12 19:11:00,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:11:00,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:11:00,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300909054] [2020-10-12 19:11:00,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:11:00,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:11:00,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:11:00,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:11:00,410 INFO L87 Difference]: Start difference. First operand 1851 states and 3069 transitions. Second operand 7 states. [2020-10-12 19:11:00,600 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-12 19:11:02,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:11:02,147 INFO L93 Difference]: Finished difference Result 11254 states and 18688 transitions. [2020-10-12 19:11:02,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:11:02,147 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2020-10-12 19:11:02,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:11:02,197 INFO L225 Difference]: With dead ends: 11254 [2020-10-12 19:11:02,197 INFO L226 Difference]: Without dead ends: 9555 [2020-10-12 19:11:02,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:11:02,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9555 states. [2020-10-12 19:11:02,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9555 to 5170. [2020-10-12 19:11:02,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5170 states. [2020-10-12 19:11:02,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5170 states to 5170 states and 8561 transitions. [2020-10-12 19:11:02,605 INFO L78 Accepts]: Start accepts. Automaton has 5170 states and 8561 transitions. Word has length 63 [2020-10-12 19:11:02,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:11:02,606 INFO L479 AbstractCegarLoop]: Abstraction has 5170 states and 8561 transitions. [2020-10-12 19:11:02,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:11:02,606 INFO L276 IsEmpty]: Start isEmpty. Operand 5170 states and 8561 transitions. [2020-10-12 19:11:02,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:11:02,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:11:02,609 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:11:02,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:11:02,609 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:11:02,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:11:02,610 INFO L82 PathProgramCache]: Analyzing trace with hash 224317013, now seen corresponding path program 1 times [2020-10-12 19:11:02,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:11:02,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441014990] [2020-10-12 19:11:02,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:11:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:02,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:02,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:02,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:02,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:02,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:03,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:05,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:05,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:07,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:07,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:11:07,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:11:07,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:11:07,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:07,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:11:07,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:11:07,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 19:11:07,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 19:11:07,850 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:11:07,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:11:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:07,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:07,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:07,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:11:07,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:11:07,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:11:07,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:07,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:11:07,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:11:07,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:11:07,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:11:07,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441014990] [2020-10-12 19:11:07,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:11:07,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:11:07,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305867257] [2020-10-12 19:11:07,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:11:07,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:11:07,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:11:07,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:11:07,887 INFO L87 Difference]: Start difference. First operand 5170 states and 8561 transitions. Second operand 6 states. [2020-10-12 19:11:08,071 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-12 19:11:09,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:11:09,719 INFO L93 Difference]: Finished difference Result 20130 states and 33353 transitions. [2020-10-12 19:11:09,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:11:09,720 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-12 19:11:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:11:09,781 INFO L225 Difference]: With dead ends: 20130 [2020-10-12 19:11:09,781 INFO L226 Difference]: Without dead ends: 15113 [2020-10-12 19:11:09,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:11:09,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15113 states. [2020-10-12 19:11:10,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15113 to 9858. [2020-10-12 19:11:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9858 states. [2020-10-12 19:11:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9858 states to 9858 states and 16293 transitions. [2020-10-12 19:11:10,622 INFO L78 Accepts]: Start accepts. Automaton has 9858 states and 16293 transitions. Word has length 65 [2020-10-12 19:11:10,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:11:10,625 INFO L479 AbstractCegarLoop]: Abstraction has 9858 states and 16293 transitions. [2020-10-12 19:11:10,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:11:10,625 INFO L276 IsEmpty]: Start isEmpty. Operand 9858 states and 16293 transitions. [2020-10-12 19:11:10,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:11:10,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:11:10,627 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:11:10,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:11:10,627 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:11:10,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:11:10,628 INFO L82 PathProgramCache]: Analyzing trace with hash 624109630, now seen corresponding path program 1 times [2020-10-12 19:11:10,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:11:10,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953157746] [2020-10-12 19:11:10,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:11:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:10,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:10,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:10,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:10,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:11,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:11,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:11:11,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:11:11,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1100 [2020-10-12 19:11:11,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:11,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:11:11,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:11:11,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 19:11:11,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:11,982 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:11:11,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:11:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:11,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:11,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:11,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:11:11,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:11:11,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:11:11,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:11,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:11:11,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:11:11,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:11:11,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:11:12,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953157746] [2020-10-12 19:11:12,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:11:12,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:11:12,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548236483] [2020-10-12 19:11:12,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:11:12,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:11:12,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:11:12,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:11:12,015 INFO L87 Difference]: Start difference. First operand 9858 states and 16293 transitions. Second operand 6 states. [2020-10-12 19:11:12,230 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-12 19:11:13,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:11:13,946 INFO L93 Difference]: Finished difference Result 31208 states and 51585 transitions. [2020-10-12 19:11:13,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:11:13,947 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-12 19:11:13,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:11:13,994 INFO L225 Difference]: With dead ends: 31208 [2020-10-12 19:11:13,995 INFO L226 Difference]: Without dead ends: 21503 [2020-10-12 19:11:14,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:11:14,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21503 states. [2020-10-12 19:11:14,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21503 to 9858. [2020-10-12 19:11:14,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9858 states. [2020-10-12 19:11:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9858 states to 9858 states and 16277 transitions. [2020-10-12 19:11:14,668 INFO L78 Accepts]: Start accepts. Automaton has 9858 states and 16277 transitions. Word has length 65 [2020-10-12 19:11:14,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:11:14,668 INFO L479 AbstractCegarLoop]: Abstraction has 9858 states and 16277 transitions. [2020-10-12 19:11:14,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:11:14,669 INFO L276 IsEmpty]: Start isEmpty. Operand 9858 states and 16277 transitions. [2020-10-12 19:11:14,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:11:14,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:11:14,670 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:11:14,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:11:14,671 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:11:14,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:11:14,671 INFO L82 PathProgramCache]: Analyzing trace with hash -280562700, now seen corresponding path program 1 times [2020-10-12 19:11:14,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:11:14,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891016716] [2020-10-12 19:11:14,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:11:14,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:14,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:14,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:14,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:14,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:14,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:15,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:17,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:19,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:19,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:11:19,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:11:19,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:11:19,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:19,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:11:19,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:11:19,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 19:11:19,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:19,949 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:11:19,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:11:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:19,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:19,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:19,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:11:19,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:11:19,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:11:19,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:19,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:11:19,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:11:19,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:11:19,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:11:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:11:19,992 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891016716] [2020-10-12 19:11:19,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:11:19,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:11:19,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786374102] [2020-10-12 19:11:19,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:11:19,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:11:19,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:11:19,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:11:19,995 INFO L87 Difference]: Start difference. First operand 9858 states and 16277 transitions. Second operand 6 states. [2020-10-12 19:11:20,277 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-12 19:11:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:11:22,056 INFO L93 Difference]: Finished difference Result 26804 states and 44228 transitions. [2020-10-12 19:11:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:11:22,057 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-12 19:11:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:11:22,109 INFO L225 Difference]: With dead ends: 26804 [2020-10-12 19:11:22,109 INFO L226 Difference]: Without dead ends: 21105 [2020-10-12 19:11:22,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:11:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21105 states. [2020-10-12 19:11:23,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21105 to 15810. [2020-10-12 19:11:23,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15810 states. [2020-10-12 19:11:23,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15810 states to 15810 states and 26091 transitions. [2020-10-12 19:11:23,128 INFO L78 Accepts]: Start accepts. Automaton has 15810 states and 26091 transitions. Word has length 65 [2020-10-12 19:11:23,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:11:23,129 INFO L479 AbstractCegarLoop]: Abstraction has 15810 states and 26091 transitions. [2020-10-12 19:11:23,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:11:23,129 INFO L276 IsEmpty]: Start isEmpty. Operand 15810 states and 26091 transitions. [2020-10-12 19:11:23,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:11:23,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:11:23,130 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:11:23,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:11:23,131 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:11:23,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:11:23,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1887526218, now seen corresponding path program 1 times [2020-10-12 19:11:23,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:11:23,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82872083] [2020-10-12 19:11:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:11:23,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:23,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:23,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:23,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:23,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:23,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:23,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:23,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:25,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:25,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:28,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:28,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:11:28,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:11:28,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 19:11:28,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:28,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:11:28,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 19:11:28,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 19:11:28,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:28,362 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:11:28,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:11:28,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:28,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:28,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:28,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:11:28,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:11:28,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:11:28,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:28,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:11:28,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:11:28,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:11:28,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:11:28,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:11:28,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82872083] [2020-10-12 19:11:28,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:11:28,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:11:28,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089504855] [2020-10-12 19:11:28,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:11:28,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:11:28,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:11:28,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:11:28,407 INFO L87 Difference]: Start difference. First operand 15810 states and 26091 transitions. Second operand 6 states. [2020-10-12 19:11:28,680 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-12 19:11:30,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:11:30,766 INFO L93 Difference]: Finished difference Result 31350 states and 51708 transitions. [2020-10-12 19:11:30,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:11:30,767 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-12 19:11:30,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:11:30,812 INFO L225 Difference]: With dead ends: 31350 [2020-10-12 19:11:30,812 INFO L226 Difference]: Without dead ends: 25651 [2020-10-12 19:11:30,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:11:30,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25651 states. [2020-10-12 19:11:32,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25651 to 19902. [2020-10-12 19:11:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19902 states. [2020-10-12 19:11:32,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19902 states to 19902 states and 32851 transitions. [2020-10-12 19:11:32,336 INFO L78 Accepts]: Start accepts. Automaton has 19902 states and 32851 transitions. Word has length 65 [2020-10-12 19:11:32,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:11:32,336 INFO L479 AbstractCegarLoop]: Abstraction has 19902 states and 32851 transitions. [2020-10-12 19:11:32,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:11:32,336 INFO L276 IsEmpty]: Start isEmpty. Operand 19902 states and 32851 transitions. [2020-10-12 19:11:32,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:11:32,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:11:32,338 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:11:32,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:11:32,338 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:11:32,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:11:32,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1697717641, now seen corresponding path program 1 times [2020-10-12 19:11:32,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:11:32,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832925955] [2020-10-12 19:11:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:11:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:32,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:32,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:32,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:32,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:32,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:32,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:32,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:34,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:34,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:37,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:37,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:11:37,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:11:37,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 19:11:37,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:37,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:11:37,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 19:11:37,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 19:11:37,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:37,553 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:11:37,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:11:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:37,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:37,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:37,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:11:37,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:11:37,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:11:37,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:37,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:11:37,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:11:37,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:11:37,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:11:37,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832925955] [2020-10-12 19:11:37,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:11:37,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:11:37,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89063137] [2020-10-12 19:11:37,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:11:37,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:11:37,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:11:37,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:11:37,576 INFO L87 Difference]: Start difference. First operand 19902 states and 32851 transitions. Second operand 7 states. [2020-10-12 19:11:37,774 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-12 19:11:40,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:11:40,552 INFO L93 Difference]: Finished difference Result 41548 states and 68600 transitions. [2020-10-12 19:11:40,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:11:40,553 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-10-12 19:11:40,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:11:40,593 INFO L225 Difference]: With dead ends: 41548 [2020-10-12 19:11:40,593 INFO L226 Difference]: Without dead ends: 31843 [2020-10-12 19:11:40,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:11:40,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31843 states. [2020-10-12 19:11:41,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31843 to 25038. [2020-10-12 19:11:41,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25038 states. [2020-10-12 19:11:42,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25038 states to 25038 states and 41342 transitions. [2020-10-12 19:11:42,036 INFO L78 Accepts]: Start accepts. Automaton has 25038 states and 41342 transitions. Word has length 66 [2020-10-12 19:11:42,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:11:42,037 INFO L479 AbstractCegarLoop]: Abstraction has 25038 states and 41342 transitions. [2020-10-12 19:11:42,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:11:42,037 INFO L276 IsEmpty]: Start isEmpty. Operand 25038 states and 41342 transitions. [2020-10-12 19:11:42,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:11:42,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:11:42,038 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:11:42,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:11:42,038 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:11:42,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:11:42,039 INFO L82 PathProgramCache]: Analyzing trace with hash 926195294, now seen corresponding path program 1 times [2020-10-12 19:11:42,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:11:42,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800630569] [2020-10-12 19:11:42,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:11:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:42,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:42,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:42,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:42,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:42,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:42,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:42,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:11:42,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:11:42,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 470 [2020-10-12 19:11:42,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:42,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:11:42,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 19:11:42,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 19:11:42,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:42,729 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:11:42,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:11:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:42,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:42,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:42,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:11:42,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:11:42,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:11:42,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:42,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:11:42,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:11:42,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:11:42,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:11:42,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800630569] [2020-10-12 19:11:42,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:11:42,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:11:42,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486570054] [2020-10-12 19:11:42,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:11:42,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:11:42,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:11:42,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:11:42,770 INFO L87 Difference]: Start difference. First operand 25038 states and 41342 transitions. Second operand 4 states. [2020-10-12 19:11:42,947 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-12 19:11:45,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:11:45,181 INFO L93 Difference]: Finished difference Result 55613 states and 91706 transitions. [2020-10-12 19:11:45,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:11:45,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-12 19:11:45,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:11:45,221 INFO L225 Difference]: With dead ends: 55613 [2020-10-12 19:11:45,221 INFO L226 Difference]: Without dead ends: 30646 [2020-10-12 19:11:45,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:11:45,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30646 states. [2020-10-12 19:11:47,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30646 to 30562. [2020-10-12 19:11:47,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30562 states. [2020-10-12 19:11:47,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30562 states to 30562 states and 50142 transitions. [2020-10-12 19:11:47,930 INFO L78 Accepts]: Start accepts. Automaton has 30562 states and 50142 transitions. Word has length 66 [2020-10-12 19:11:47,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:11:47,930 INFO L479 AbstractCegarLoop]: Abstraction has 30562 states and 50142 transitions. [2020-10-12 19:11:47,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:11:47,930 INFO L276 IsEmpty]: Start isEmpty. Operand 30562 states and 50142 transitions. [2020-10-12 19:11:47,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:11:47,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:11:47,932 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:11:47,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:11:47,932 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:11:47,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:11:47,933 INFO L82 PathProgramCache]: Analyzing trace with hash 735017138, now seen corresponding path program 1 times [2020-10-12 19:11:47,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:11:47,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205732985] [2020-10-12 19:11:47,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:11:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:47,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:47,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:47,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:48,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:48,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:48,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:49,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:52,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:52,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:11:52,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:11:52,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:11:52,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:52,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:11:52,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:11:52,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 19:11:52,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:53,123 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:11:53,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:11:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:53,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:53,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:53,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:11:53,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:11:53,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:11:53,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:53,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:11:53,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:11:53,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:11:53,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:11:53,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205732985] [2020-10-12 19:11:53,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:11:53,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:11:53,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333480014] [2020-10-12 19:11:53,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:11:53,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:11:53,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:11:53,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:11:53,144 INFO L87 Difference]: Start difference. First operand 30562 states and 50142 transitions. Second operand 5 states. [2020-10-12 19:11:53,337 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-12 19:11:55,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:11:55,771 INFO L93 Difference]: Finished difference Result 57156 states and 93781 transitions. [2020-10-12 19:11:55,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:11:55,772 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-12 19:11:55,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:11:55,808 INFO L225 Difference]: With dead ends: 57156 [2020-10-12 19:11:55,808 INFO L226 Difference]: Without dead ends: 34015 [2020-10-12 19:11:55,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:11:55,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34015 states. [2020-10-12 19:11:57,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34015 to 32207. [2020-10-12 19:11:57,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32207 states. [2020-10-12 19:11:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32207 states to 32207 states and 52971 transitions. [2020-10-12 19:11:57,782 INFO L78 Accepts]: Start accepts. Automaton has 32207 states and 52971 transitions. Word has length 66 [2020-10-12 19:11:57,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:11:57,783 INFO L479 AbstractCegarLoop]: Abstraction has 32207 states and 52971 transitions. [2020-10-12 19:11:57,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:11:57,783 INFO L276 IsEmpty]: Start isEmpty. Operand 32207 states and 52971 transitions. [2020-10-12 19:11:57,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:11:57,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:11:57,784 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:11:57,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:11:57,785 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:11:57,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:11:57,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1692190392, now seen corresponding path program 1 times [2020-10-12 19:11:57,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:11:57,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448443184] [2020-10-12 19:11:57,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:11:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:57,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:57,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:57,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:57,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:57,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:58,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:58,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:00,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:00,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:02,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:02,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:12:02,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:12:02,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:12:02,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:02,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:12:02,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 19:12:02,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 19:12:02,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:02,991 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:12:02,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:12:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:02,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:03,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:03,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:12:03,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:12:03,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:12:03,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:03,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:12:03,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:12:03,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:12:03,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:12:03,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448443184] [2020-10-12 19:12:03,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:12:03,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:12:03,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608444663] [2020-10-12 19:12:03,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:12:03,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:12:03,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:12:03,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:12:03,012 INFO L87 Difference]: Start difference. First operand 32207 states and 52971 transitions. Second operand 7 states. [2020-10-12 19:12:03,203 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-12 19:12:07,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:12:07,168 INFO L93 Difference]: Finished difference Result 63836 states and 105281 transitions. [2020-10-12 19:12:07,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:12:07,169 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 19:12:07,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:12:07,224 INFO L225 Difference]: With dead ends: 63836 [2020-10-12 19:12:07,224 INFO L226 Difference]: Without dead ends: 50298 [2020-10-12 19:12:07,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:12:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50298 states. [2020-10-12 19:12:09,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50298 to 39115. [2020-10-12 19:12:09,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39115 states. [2020-10-12 19:12:09,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39115 states to 39115 states and 64421 transitions. [2020-10-12 19:12:09,972 INFO L78 Accepts]: Start accepts. Automaton has 39115 states and 64421 transitions. Word has length 67 [2020-10-12 19:12:09,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:12:09,972 INFO L479 AbstractCegarLoop]: Abstraction has 39115 states and 64421 transitions. [2020-10-12 19:12:09,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:12:09,972 INFO L276 IsEmpty]: Start isEmpty. Operand 39115 states and 64421 transitions. [2020-10-12 19:12:09,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:12:09,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:12:09,974 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:12:09,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:12:09,974 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:12:09,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:12:09,974 INFO L82 PathProgramCache]: Analyzing trace with hash -970789006, now seen corresponding path program 1 times [2020-10-12 19:12:09,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:12:09,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [211484334] [2020-10-12 19:12:09,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:12:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:09,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:10,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:10,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:10,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:10,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:10,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:10,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:13,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:13,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:14,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:14,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:12:14,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:12:14,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:12:14,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:14,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:12:14,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 19:12:14,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 19:12:14,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:15,202 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:12:15,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:12:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:15,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:15,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:15,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:12:15,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:12:15,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:12:15,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:15,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:12:15,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:12:15,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:12:15,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:12:15,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [211484334] [2020-10-12 19:12:15,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:12:15,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:12:15,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140692952] [2020-10-12 19:12:15,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:12:15,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:12:15,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:12:15,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:12:15,230 INFO L87 Difference]: Start difference. First operand 39115 states and 64421 transitions. Second operand 7 states. [2020-10-12 19:12:15,419 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-12 19:12:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:12:21,038 INFO L93 Difference]: Finished difference Result 79643 states and 131474 transitions. [2020-10-12 19:12:21,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:12:21,042 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-12 19:12:21,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:12:21,112 INFO L225 Difference]: With dead ends: 79643 [2020-10-12 19:12:21,112 INFO L226 Difference]: Without dead ends: 60879 [2020-10-12 19:12:21,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:12:21,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60879 states. [2020-10-12 19:12:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60879 to 44970. [2020-10-12 19:12:24,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44970 states. [2020-10-12 19:12:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44970 states to 44970 states and 74129 transitions. [2020-10-12 19:12:24,512 INFO L78 Accepts]: Start accepts. Automaton has 44970 states and 74129 transitions. Word has length 68 [2020-10-12 19:12:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:12:24,512 INFO L479 AbstractCegarLoop]: Abstraction has 44970 states and 74129 transitions. [2020-10-12 19:12:24,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:12:24,513 INFO L276 IsEmpty]: Start isEmpty. Operand 44970 states and 74129 transitions. [2020-10-12 19:12:24,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:12:24,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:12:24,514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:12:24,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:12:24,514 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:12:24,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:12:24,515 INFO L82 PathProgramCache]: Analyzing trace with hash -653597307, now seen corresponding path program 1 times [2020-10-12 19:12:24,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:12:24,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803949476] [2020-10-12 19:12:24,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:12:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:24,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:24,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:24,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:24,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:24,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:24,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:24,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:24,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:25,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:28,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:29,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:29,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:12:29,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:12:29,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:12:29,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:29,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:12:29,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:12:29,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 19:12:29,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:29,718 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:12:29,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:12:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:29,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:29,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:29,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:12:29,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:12:29,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:12:29,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:29,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:12:29,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:12:29,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:12:29,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:12:29,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803949476] [2020-10-12 19:12:29,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:12:29,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:12:29,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721078552] [2020-10-12 19:12:29,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:12:29,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:12:29,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:12:29,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:12:29,741 INFO L87 Difference]: Start difference. First operand 44970 states and 74129 transitions. Second operand 5 states. [2020-10-12 19:12:36,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:12:36,878 INFO L93 Difference]: Finished difference Result 131964 states and 217630 transitions. [2020-10-12 19:12:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:12:36,879 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-12 19:12:36,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:12:36,999 INFO L225 Difference]: With dead ends: 131964 [2020-10-12 19:12:36,999 INFO L226 Difference]: Without dead ends: 87005 [2020-10-12 19:12:37,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:12:37,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87005 states. [2020-10-12 19:12:45,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87005 to 87003. [2020-10-12 19:12:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87003 states. [2020-10-12 19:12:45,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87003 states to 87003 states and 142272 transitions. [2020-10-12 19:12:45,248 INFO L78 Accepts]: Start accepts. Automaton has 87003 states and 142272 transitions. Word has length 69 [2020-10-12 19:12:45,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:12:45,248 INFO L479 AbstractCegarLoop]: Abstraction has 87003 states and 142272 transitions. [2020-10-12 19:12:45,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:12:45,248 INFO L276 IsEmpty]: Start isEmpty. Operand 87003 states and 142272 transitions. [2020-10-12 19:12:45,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:12:45,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:12:45,252 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:12:45,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:12:45,252 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:12:45,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:12:45,253 INFO L82 PathProgramCache]: Analyzing trace with hash 623683436, now seen corresponding path program 1 times [2020-10-12 19:12:45,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:12:45,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146565495] [2020-10-12 19:12:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:12:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:45,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:45,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:45,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:45,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:45,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:46,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:46,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:48,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:48,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:12:48,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:12:48,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2784 [2020-10-12 19:12:48,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:48,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:12:48,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-12 19:12:48,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 19:12:48,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:48,241 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:12:48,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:12:48,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:48,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:48,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:48,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:12:48,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:12:48,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:12:48,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:48,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:12:48,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:12:48,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:12:48,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:48,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:12:48,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146565495] [2020-10-12 19:12:48,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:12:48,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:12:48,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686879103] [2020-10-12 19:12:48,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:12:48,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:12:48,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:12:48,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:12:48,265 INFO L87 Difference]: Start difference. First operand 87003 states and 142272 transitions. Second operand 5 states. [2020-10-12 19:12:48,471 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-12 19:12:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:12:57,822 INFO L93 Difference]: Finished difference Result 174779 states and 286251 transitions. [2020-10-12 19:12:57,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:12:57,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-12 19:12:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:12:57,958 INFO L225 Difference]: With dead ends: 174779 [2020-10-12 19:12:57,958 INFO L226 Difference]: Without dead ends: 97722 [2020-10-12 19:12:58,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:12:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97722 states. [2020-10-12 19:13:05,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97722 to 97568. [2020-10-12 19:13:05,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97568 states. [2020-10-12 19:13:05,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97568 states to 97568 states and 158864 transitions. [2020-10-12 19:13:05,896 INFO L78 Accepts]: Start accepts. Automaton has 97568 states and 158864 transitions. Word has length 70 [2020-10-12 19:13:05,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:13:05,896 INFO L479 AbstractCegarLoop]: Abstraction has 97568 states and 158864 transitions. [2020-10-12 19:13:05,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:13:05,896 INFO L276 IsEmpty]: Start isEmpty. Operand 97568 states and 158864 transitions. [2020-10-12 19:13:05,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:13:05,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:13:05,899 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:13:05,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:13:05,899 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:13:05,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:13:05,899 INFO L82 PathProgramCache]: Analyzing trace with hash 638828762, now seen corresponding path program 1 times [2020-10-12 19:13:05,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:13:05,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118822982] [2020-10-12 19:13:05,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:13:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:05,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:05,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:05,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:05,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:06,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:06,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:06,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:06,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:06,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:06,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:10,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:10,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:13:10,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:13:10,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:13:10,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:10,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:13:10,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:13:10,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 19:13:10,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:11,144 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:13:11,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:13:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:11,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:11,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:11,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:13:11,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:13:11,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:13:11,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:11,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:13:11,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:13:11,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:13:11,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:13:11,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118822982] [2020-10-12 19:13:11,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:13:11,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:13:11,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417252240] [2020-10-12 19:13:11,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:13:11,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:13:11,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:13:11,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:13:11,171 INFO L87 Difference]: Start difference. First operand 97568 states and 158864 transitions. Second operand 5 states. [2020-10-12 19:13:28,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:13:28,720 INFO L93 Difference]: Finished difference Result 285529 states and 465087 transitions. [2020-10-12 19:13:28,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:13:28,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-12 19:13:28,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:13:28,997 INFO L225 Difference]: With dead ends: 285529 [2020-10-12 19:13:28,997 INFO L226 Difference]: Without dead ends: 188180 [2020-10-12 19:13:29,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:13:29,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188180 states. [2020-10-12 19:13:48,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188180 to 188178. [2020-10-12 19:13:48,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188178 states. [2020-10-12 19:13:49,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188178 states to 188178 states and 303685 transitions. [2020-10-12 19:13:49,261 INFO L78 Accepts]: Start accepts. Automaton has 188178 states and 303685 transitions. Word has length 70 [2020-10-12 19:13:49,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:13:49,261 INFO L479 AbstractCegarLoop]: Abstraction has 188178 states and 303685 transitions. [2020-10-12 19:13:49,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:13:49,261 INFO L276 IsEmpty]: Start isEmpty. Operand 188178 states and 303685 transitions. [2020-10-12 19:13:49,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:13:49,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:13:49,264 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:13:49,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:13:49,265 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:13:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:13:49,265 INFO L82 PathProgramCache]: Analyzing trace with hash 311503267, now seen corresponding path program 1 times [2020-10-12 19:13:49,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:13:49,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391256873] [2020-10-12 19:13:49,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:13:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:49,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:49,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:49,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:49,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:49,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:49,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:49,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:51,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:51,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:54,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:54,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:13:54,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:13:54,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:13:54,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:54,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:13:54,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 19:13:54,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 19:13:54,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:54,676 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-12 19:13:54,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:13:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:54,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:54,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:54,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:13:54,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:13:54,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:13:54,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:54,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:13:54,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:13:54,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:13:54,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:54,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:13:54,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391256873] [2020-10-12 19:13:54,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:13:54,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:13:54,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534809237] [2020-10-12 19:13:54,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:13:54,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:13:54,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:13:54,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:13:54,696 INFO L87 Difference]: Start difference. First operand 188178 states and 303685 transitions. Second operand 7 states. [2020-10-12 19:13:54,887 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-12 19:14:20,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:14:20,868 INFO L93 Difference]: Finished difference Result 336848 states and 542480 transitions. [2020-10-12 19:14:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:14:20,868 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-10-12 19:14:20,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:14:21,217 INFO L225 Difference]: With dead ends: 336848 [2020-10-12 19:14:21,217 INFO L226 Difference]: Without dead ends: 248564 [2020-10-12 19:14:21,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:14:21,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248564 states.