/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.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:10:29,631 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:10:29,634 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:10:29,678 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:10:29,679 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:10:29,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:10:29,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:10:29,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:10:29,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:10:29,697 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:10:29,698 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:10:29,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:10:29,699 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:10:29,702 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:10:29,705 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:10:29,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:10:29,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:10:29,707 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:10:29,709 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:10:29,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:10:29,719 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:10:29,720 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:10:29,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:10:29,721 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:10:29,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:10:29,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:10:29,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:10:29,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:10:29,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:10:29,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:10:29,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:10:29,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:10:29,737 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:10:29,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:10:29,739 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:10:29,739 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:10:29,740 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:10:29,740 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:10:29,740 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:10:29,741 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:10:29,741 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:10:29,742 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 19:10:29,765 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:10:29,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:10:29,766 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:10:29,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:10:29,767 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:10:29,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:10:29,767 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:10:29,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:10:29,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:10:29,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:10:29,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:10:29,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:10:29,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:10:29,768 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:10:29,768 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:10:29,769 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:10:29,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:10:29,769 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:10:29,769 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:10:29,769 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:10:29,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:10:29,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:10:29,770 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:10:29,770 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:10:29,770 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:10:29,771 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:10:29,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:10:29,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:10:29,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:10:29,771 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 19:10:30,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:10:30,121 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:10:30,125 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:10:30,126 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:10:30,127 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:10:30,128 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-12 19:10:30,193 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7bc1be33/a2ec5a31ef3a4410b6ab90c34d5a882a/FLAG22edd3667 [2020-10-12 19:10:30,691 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:10:30,692 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-12 19:10:30,721 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7bc1be33/a2ec5a31ef3a4410b6ab90c34d5a882a/FLAG22edd3667 [2020-10-12 19:10:31,046 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c7bc1be33/a2ec5a31ef3a4410b6ab90c34d5a882a [2020-10-12 19:10:31,055 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:10:31,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:10:31,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:10:31,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:10:31,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:10:31,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:10:31" (1/1) ... [2020-10-12 19:10:31,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c1be1e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:31, skipping insertion in model container [2020-10-12 19:10:31,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:10:31" (1/1) ... [2020-10-12 19:10:31,076 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:10:31,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:10:31,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:10:31,700 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:10:31,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:10:31,911 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:10:31,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:31 WrapperNode [2020-10-12 19:10:31,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:10:31,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:10:31,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:10:31,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:10:31,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:31" (1/1) ... [2020-10-12 19:10:31,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:31" (1/1) ... [2020-10-12 19:10:31,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:31" (1/1) ... [2020-10-12 19:10:31,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:31" (1/1) ... [2020-10-12 19:10:31,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:31" (1/1) ... [2020-10-12 19:10:31,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:31" (1/1) ... [2020-10-12 19:10:32,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:31" (1/1) ... [2020-10-12 19:10:32,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:10:32,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:10:32,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:10:32,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:10:32,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:31" (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 19:10:32,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:10:32,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:10:32,125 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:10:32,125 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:10:32,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:10:32,126 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:10:32,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:10:32,128 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:10:32,128 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:10:32,128 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:10:32,128 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:10:32,128 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:10:32,129 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:10:32,129 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:10:32,129 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:10:32,130 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:10:32,130 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:10:32,130 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:10:32,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:10:32,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:10:33,448 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:10:33,448 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:10:33,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:10:33 BoogieIcfgContainer [2020-10-12 19:10:33,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:10:33,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:10:33,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:10:33,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:10:33,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:10:31" (1/3) ... [2020-10-12 19:10:33,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45274aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:10:33, skipping insertion in model container [2020-10-12 19:10:33,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:10:31" (2/3) ... [2020-10-12 19:10:33,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45274aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:10:33, skipping insertion in model container [2020-10-12 19:10:33,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:10:33" (3/3) ... [2020-10-12 19:10:33,464 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-12 19:10:33,475 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:10:33,484 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:10:33,500 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:10:33,533 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:10:33,533 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:10:33,533 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:10:33,533 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:10:33,533 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:10:33,534 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:10:33,534 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:10:33,534 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:10:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states. [2020-10-12 19:10:33,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-12 19:10:33,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:10:33,589 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:10:33,589 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:10:33,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:10:33,596 INFO L82 PathProgramCache]: Analyzing trace with hash 112483708, now seen corresponding path program 1 times [2020-10-12 19:10:33,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:10:33,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505346114] [2020-10-12 19:10:33,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:10:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:34,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:34,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:34,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:34,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:34,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:35,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:35,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:35,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:35,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:36,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:36,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:36,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:38,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:39,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:39,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-12 19:10:39,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 19:10:39,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-12 19:10:39,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:39,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:10:39,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:10:39,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 19:10:39,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 19:10:39,620 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:10:39,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:10:39,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:39,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:39,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:39,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:10:39,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:10:39,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 19:10:39,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:39,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:10:39,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:10:39,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:10:39,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:10:39,790 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 19:10:39,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505346114] [2020-10-12 19:10:39,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:10:39,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:10:39,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992290443] [2020-10-12 19:10:39,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:10:39,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:10:39,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:10:39,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:10:39,821 INFO L87 Difference]: Start difference. First operand 310 states. Second operand 5 states. [2020-10-12 19:10:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:10:42,674 INFO L93 Difference]: Finished difference Result 882 states and 1563 transitions. [2020-10-12 19:10:42,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:10:42,676 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-10-12 19:10:42,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:10:42,711 INFO L225 Difference]: With dead ends: 882 [2020-10-12 19:10:42,711 INFO L226 Difference]: Without dead ends: 581 [2020-10-12 19:10:42,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:10:42,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2020-10-12 19:10:42,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 579. [2020-10-12 19:10:42,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2020-10-12 19:10:42,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 836 transitions. [2020-10-12 19:10:42,835 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 836 transitions. Word has length 148 [2020-10-12 19:10:42,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:10:42,836 INFO L479 AbstractCegarLoop]: Abstraction has 579 states and 836 transitions. [2020-10-12 19:10:42,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:10:42,837 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 836 transitions. [2020-10-12 19:10:42,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-12 19:10:42,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:10:42,842 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:10:42,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:10:42,843 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:10:42,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:10:42,843 INFO L82 PathProgramCache]: Analyzing trace with hash 705781785, now seen corresponding path program 1 times [2020-10-12 19:10:42,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:10:42,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985384446] [2020-10-12 19:10:42,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:10:42,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:42,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:42,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:43,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:43,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:43,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:43,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:43,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:43,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:43,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:45,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:45,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:45,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:46,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:46,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:47,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:47,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:47,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-12 19:10:47,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 19:10:47,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 19:10:47,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:47,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:10:47,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:10:47,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-12 19:10:47,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:10:48,210 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:10:48,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:10:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:48,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:48,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:48,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:10:48,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:10:48,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:10:48,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:48,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:10:48,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:10:48,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:10:48,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 19:10:48,297 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 19:10:48,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985384446] [2020-10-12 19:10:48,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:10:48,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:10:48,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905016387] [2020-10-12 19:10:48,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:10:48,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:10:48,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:10:48,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:10:48,302 INFO L87 Difference]: Start difference. First operand 579 states and 836 transitions. Second operand 5 states. [2020-10-12 19:10:50,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:10:50,621 INFO L93 Difference]: Finished difference Result 1658 states and 2383 transitions. [2020-10-12 19:10:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:10:50,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 149 [2020-10-12 19:10:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:10:50,629 INFO L225 Difference]: With dead ends: 1658 [2020-10-12 19:10:50,629 INFO L226 Difference]: Without dead ends: 1113 [2020-10-12 19:10:50,635 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 19:10:50,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2020-10-12 19:10:50,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 1111. [2020-10-12 19:10:50,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1111 states. [2020-10-12 19:10:50,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1583 transitions. [2020-10-12 19:10:50,704 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1583 transitions. Word has length 149 [2020-10-12 19:10:50,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:10:50,705 INFO L479 AbstractCegarLoop]: Abstraction has 1111 states and 1583 transitions. [2020-10-12 19:10:50,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:10:50,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1583 transitions. [2020-10-12 19:10:50,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-12 19:10:50,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:10:50,709 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:10:50,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:10:50,710 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:10:50,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:10:50,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1751516322, now seen corresponding path program 1 times [2020-10-12 19:10:50,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:10:50,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539892803] [2020-10-12 19:10:50,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:10:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:50,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:50,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:50,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:50,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:51,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:51,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:51,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:51,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:51,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:53,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:53,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:53,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:53,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:55,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:55,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-12 19:10:55,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 19:10:55,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 19:10:55,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:55,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:10:55,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:10:55,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-12 19:10:55,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:10:56,095 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:10:56,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:10:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:56,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:56,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:10:56,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:10:56,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:10:56,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 19:10:56,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:10:56,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:10:56,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:10:56,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:10:56,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:10:56,220 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 19:10:56,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539892803] [2020-10-12 19:10:56,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:10:56,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:10:56,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886653498] [2020-10-12 19:10:56,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:10:56,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:10:56,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:10:56,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:10:56,232 INFO L87 Difference]: Start difference. First operand 1111 states and 1583 transitions. Second operand 5 states. [2020-10-12 19:10:58,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:10:58,785 INFO L93 Difference]: Finished difference Result 3218 states and 4572 transitions. [2020-10-12 19:10:58,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:10:58,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2020-10-12 19:10:58,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:10:58,798 INFO L225 Difference]: With dead ends: 3218 [2020-10-12 19:10:58,798 INFO L226 Difference]: Without dead ends: 2120 [2020-10-12 19:10:58,802 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 19:10:58,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2120 states. [2020-10-12 19:10:58,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2120 to 2118. [2020-10-12 19:10:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2118 states. [2020-10-12 19:10:58,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 2978 transitions. [2020-10-12 19:10:58,917 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 2978 transitions. Word has length 150 [2020-10-12 19:10:58,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:10:58,918 INFO L479 AbstractCegarLoop]: Abstraction has 2118 states and 2978 transitions. [2020-10-12 19:10:58,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:10:58,918 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 2978 transitions. [2020-10-12 19:10:58,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-12 19:10:58,924 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:10:58,924 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:10:58,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:10:58,925 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:10:58,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:10:58,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1051854343, now seen corresponding path program 1 times [2020-10-12 19:10:58,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:10:58,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081573565] [2020-10-12 19:10:58,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:10:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:10:58,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:58,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:59,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:59,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:59,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:59,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:10:59,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:00,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:00,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:00,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:02,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:02,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:03,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:03,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-12 19:11:03,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 19:11:03,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 19:11:03,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:03,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:11:03,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:11:03,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-12 19:11:03,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:04,271 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:11:04,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:11:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:04,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:04,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:04,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:11:04,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:11:04,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:11:04,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:04,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:11:04,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:11:04,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:11:04,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:04,365 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 19:11:04,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081573565] [2020-10-12 19:11:04,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:11:04,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:11:04,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831589810] [2020-10-12 19:11:04,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:11:04,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:11:04,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:11:04,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:11:04,369 INFO L87 Difference]: Start difference. First operand 2118 states and 2978 transitions. Second operand 5 states. [2020-10-12 19:11:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:11:07,052 INFO L93 Difference]: Finished difference Result 5605 states and 7934 transitions. [2020-10-12 19:11:07,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:11:07,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 151 [2020-10-12 19:11:07,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:11:07,072 INFO L225 Difference]: With dead ends: 5605 [2020-10-12 19:11:07,073 INFO L226 Difference]: Without dead ends: 4055 [2020-10-12 19:11:07,077 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 19:11:07,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4055 states. [2020-10-12 19:11:07,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4055 to 4053. [2020-10-12 19:11:07,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4053 states. [2020-10-12 19:11:07,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4053 states to 4053 states and 5620 transitions. [2020-10-12 19:11:07,289 INFO L78 Accepts]: Start accepts. Automaton has 4053 states and 5620 transitions. Word has length 151 [2020-10-12 19:11:07,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:11:07,289 INFO L479 AbstractCegarLoop]: Abstraction has 4053 states and 5620 transitions. [2020-10-12 19:11:07,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:11:07,290 INFO L276 IsEmpty]: Start isEmpty. Operand 4053 states and 5620 transitions. [2020-10-12 19:11:07,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-12 19:11:07,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:11:07,300 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:11:07,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:11:07,301 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:11:07,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:11:07,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1387558753, now seen corresponding path program 1 times [2020-10-12 19:11:07,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:11:07,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114562705] [2020-10-12 19:11:07,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:11:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:07,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:07,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:07,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:07,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:07,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:07,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:08,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:08,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:10,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:12,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:12,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-12 19:11:12,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:11:12,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 19:11:12,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:12,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:11:12,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 19:11:12,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 19:11:12,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:12,562 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:11:12,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:11:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:12,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:12,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:12,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:11:12,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:11:12,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:11:12,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:12,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:11:12,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:11:12,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:11:12,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:12,611 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 19:11:12,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114562705] [2020-10-12 19:11:12,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:11:12,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:11:12,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677062806] [2020-10-12 19:11:12,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:11:12,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:11:12,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:11:12,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:11:12,614 INFO L87 Difference]: Start difference. First operand 4053 states and 5620 transitions. Second operand 5 states. [2020-10-12 19:11:13,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:11:13,987 INFO L93 Difference]: Finished difference Result 6971 states and 9668 transitions. [2020-10-12 19:11:13,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:11:13,987 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 152 [2020-10-12 19:11:13,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:11:14,000 INFO L225 Difference]: With dead ends: 6971 [2020-10-12 19:11:14,001 INFO L226 Difference]: Without dead ends: 3121 [2020-10-12 19:11:14,009 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 19:11:14,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3121 states. [2020-10-12 19:11:14,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3121 to 3118. [2020-10-12 19:11:14,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3118 states. [2020-10-12 19:11:14,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3118 states to 3118 states and 4301 transitions. [2020-10-12 19:11:14,177 INFO L78 Accepts]: Start accepts. Automaton has 3118 states and 4301 transitions. Word has length 152 [2020-10-12 19:11:14,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:11:14,177 INFO L479 AbstractCegarLoop]: Abstraction has 3118 states and 4301 transitions. [2020-10-12 19:11:14,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:11:14,177 INFO L276 IsEmpty]: Start isEmpty. Operand 3118 states and 4301 transitions. [2020-10-12 19:11:14,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-12 19:11:14,186 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:11:14,186 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:11:14,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:11:14,187 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:11:14,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:11:14,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1418901607, now seen corresponding path program 1 times [2020-10-12 19:11:14,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:11:14,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781171265] [2020-10-12 19:11:14,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:11:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:14,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:14,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:14,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:14,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:14,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:14,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:14,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:14,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:18,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:18,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:18,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:18,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:19,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:19,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-12 19:11:19,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 19:11:19,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:11:19,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:19,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:11:19,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:11:19,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:11:19,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:19,458 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:11:19,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:11:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:19,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:19,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:19,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:11:19,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:11:19,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:11:19,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:19,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:11:19,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:11:19,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:11:19,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:19,517 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 19:11:19,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781171265] [2020-10-12 19:11:19,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:11:19,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:11:19,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539835177] [2020-10-12 19:11:19,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:11:19,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:11:19,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:11:19,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:11:19,519 INFO L87 Difference]: Start difference. First operand 3118 states and 4301 transitions. Second operand 5 states. [2020-10-12 19:11:22,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:11:22,097 INFO L93 Difference]: Finished difference Result 7497 states and 10444 transitions. [2020-10-12 19:11:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:11:22,098 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 159 [2020-10-12 19:11:22,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:11:22,118 INFO L225 Difference]: With dead ends: 7497 [2020-10-12 19:11:22,118 INFO L226 Difference]: Without dead ends: 5071 [2020-10-12 19:11:22,126 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 19:11:22,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5071 states. [2020-10-12 19:11:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5071 to 5061. [2020-10-12 19:11:22,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5061 states. [2020-10-12 19:11:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5061 states to 5061 states and 6888 transitions. [2020-10-12 19:11:22,445 INFO L78 Accepts]: Start accepts. Automaton has 5061 states and 6888 transitions. Word has length 159 [2020-10-12 19:11:22,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:11:22,447 INFO L479 AbstractCegarLoop]: Abstraction has 5061 states and 6888 transitions. [2020-10-12 19:11:22,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:11:22,447 INFO L276 IsEmpty]: Start isEmpty. Operand 5061 states and 6888 transitions. [2020-10-12 19:11:22,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-12 19:11:22,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:11:22,459 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:11:22,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:11:22,459 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:11:22,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:11:22,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1688897695, now seen corresponding path program 1 times [2020-10-12 19:11:22,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:11:22,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347659489] [2020-10-12 19:11:22,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:11:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:22,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:22,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:22,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:22,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:22,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:23,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:23,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:23,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:23,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:27,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:27,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-12 19:11:27,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:11:27,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:11:27,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:27,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:11:27,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:11:27,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 19:11:27,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:11:27,761 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:11:27,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:11:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:27,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:27,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:27,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:11:27,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:11:27,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:11:27,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:27,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:11:27,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:11:27,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:11:27,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:27,792 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 19:11:27,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347659489] [2020-10-12 19:11:27,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:11:27,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:11:27,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79753760] [2020-10-12 19:11:27,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:11:27,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:11:27,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:11:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:11:27,795 INFO L87 Difference]: Start difference. First operand 5061 states and 6888 transitions. Second operand 5 states. [2020-10-12 19:11:29,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:11:29,165 INFO L93 Difference]: Finished difference Result 8584 states and 11738 transitions. [2020-10-12 19:11:29,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:11:29,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 160 [2020-10-12 19:11:29,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:11:29,178 INFO L225 Difference]: With dead ends: 8584 [2020-10-12 19:11:29,178 INFO L226 Difference]: Without dead ends: 3885 [2020-10-12 19:11:29,188 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 19:11:29,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2020-10-12 19:11:29,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3885. [2020-10-12 19:11:29,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3885 states. [2020-10-12 19:11:29,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 5270 transitions. [2020-10-12 19:11:29,458 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 5270 transitions. Word has length 160 [2020-10-12 19:11:29,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:11:29,458 INFO L479 AbstractCegarLoop]: Abstraction has 3885 states and 5270 transitions. [2020-10-12 19:11:29,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:11:29,459 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 5270 transitions. [2020-10-12 19:11:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-12 19:11:29,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:11:29,465 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:11:29,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:11:29,466 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:11:29,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:11:29,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1432868419, now seen corresponding path program 1 times [2020-10-12 19:11:29,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:11:29,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957947154] [2020-10-12 19:11:29,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:11:29,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:29,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:29,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:29,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:29,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:29,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:29,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:29,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:29,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:29,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:34,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:34,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:34,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-12 19:11:34,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:11:34,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 19:11:34,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:11:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-12 19:11:34,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-12 19:11:34,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:34,774 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:11:34,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:11:34,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:34,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:34,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:34,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:11:34,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:11:34,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:11:34,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:34,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:11:34,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:11:34,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:11:34,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:34,814 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 19:11:34,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957947154] [2020-10-12 19:11:34,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:11:34,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:11:34,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600023895] [2020-10-12 19:11:34,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:11:34,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:11:34,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:11:34,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:11:34,816 INFO L87 Difference]: Start difference. First operand 3885 states and 5270 transitions. Second operand 6 states. [2020-10-12 19:11:35,019 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 19:11:37,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:11:37,204 INFO L93 Difference]: Finished difference Result 7922 states and 11294 transitions. [2020-10-12 19:11:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:11:37,204 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 167 [2020-10-12 19:11:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:11:37,230 INFO L225 Difference]: With dead ends: 7922 [2020-10-12 19:11:37,230 INFO L226 Difference]: Without dead ends: 6471 [2020-10-12 19:11:37,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:11:37,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6471 states. [2020-10-12 19:11:37,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6471 to 6469. [2020-10-12 19:11:37,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6469 states. [2020-10-12 19:11:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6469 states to 6469 states and 8938 transitions. [2020-10-12 19:11:37,605 INFO L78 Accepts]: Start accepts. Automaton has 6469 states and 8938 transitions. Word has length 167 [2020-10-12 19:11:37,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:11:37,606 INFO L479 AbstractCegarLoop]: Abstraction has 6469 states and 8938 transitions. [2020-10-12 19:11:37,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:11:37,606 INFO L276 IsEmpty]: Start isEmpty. Operand 6469 states and 8938 transitions. [2020-10-12 19:11:37,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-12 19:11:37,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:11:37,614 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:11:37,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:11:37,615 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:11:37,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:11:37,615 INFO L82 PathProgramCache]: Analyzing trace with hash -509483632, now seen corresponding path program 1 times [2020-10-12 19:11:37,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:11:37,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887105092] [2020-10-12 19:11:37,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:11:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:37,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:37,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:37,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:37,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:37,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:37,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:37,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:37,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:38,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:41,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:42,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:42,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-12 19:11:42,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:11:42,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 19:11:42,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:42,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:11:42,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 19:11:42,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-12 19:11:42,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:43,138 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:11:43,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:11:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:43,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:43,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:11:43,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:11:43,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:11:43,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:11:43,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:11:43,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:11:43,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:11:43,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:11:43,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:11:43,235 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 19:11:43,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887105092] [2020-10-12 19:11:43,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:11:43,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:11:43,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813640168] [2020-10-12 19:11:43,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:11:43,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:11:43,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:11:43,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:11:43,238 INFO L87 Difference]: Start difference. First operand 6469 states and 8938 transitions. Second operand 12 states. [2020-10-12 19:11:43,961 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 210 [2020-10-12 19:11:47,638 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-12 19:11:57,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:11:57,855 INFO L93 Difference]: Finished difference Result 18935 states and 27626 transitions. [2020-10-12 19:11:57,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:11:57,856 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 167 [2020-10-12 19:11:57,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:11:57,895 INFO L225 Difference]: With dead ends: 18935 [2020-10-12 19:11:57,896 INFO L226 Difference]: Without dead ends: 17751 [2020-10-12 19:11:57,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-10-12 19:11:57,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17751 states. [2020-10-12 19:11:58,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17751 to 8459. [2020-10-12 19:11:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8459 states. [2020-10-12 19:11:58,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8459 states to 8459 states and 11392 transitions. [2020-10-12 19:11:58,656 INFO L78 Accepts]: Start accepts. Automaton has 8459 states and 11392 transitions. Word has length 167 [2020-10-12 19:11:58,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:11:58,656 INFO L479 AbstractCegarLoop]: Abstraction has 8459 states and 11392 transitions. [2020-10-12 19:11:58,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:11:58,656 INFO L276 IsEmpty]: Start isEmpty. Operand 8459 states and 11392 transitions. [2020-10-12 19:11:58,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-12 19:11:58,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:11:58,665 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:11:58,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:11:58,665 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:11:58,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:11:58,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1999724589, now seen corresponding path program 1 times [2020-10-12 19:11:58,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:11:58,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236108915] [2020-10-12 19:11:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:11:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:11:58,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:58,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:58,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:58,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:58,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:58,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:58,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:11:59,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:01,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:02,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:03,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:03,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-12 19:12:03,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:12:03,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-12 19:12:03,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:03,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:12:03,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:12:03,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-12 19:12:03,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:03,988 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:12:03,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:12:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:04,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:04,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:04,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:12:04,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:12:04,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:12:04,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:04,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:12:04,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:12:04,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:12:04,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:12:04,048 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 19:12:04,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236108915] [2020-10-12 19:12:04,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:12:04,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:12:04,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977448195] [2020-10-12 19:12:04,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:12:04,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:12:04,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:12:04,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:12:04,051 INFO L87 Difference]: Start difference. First operand 8459 states and 11392 transitions. Second operand 5 states. [2020-10-12 19:12:04,257 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-12 19:12:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:12:07,291 INFO L93 Difference]: Finished difference Result 15422 states and 20742 transitions. [2020-10-12 19:12:07,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:12:07,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 167 [2020-10-12 19:12:07,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:12:07,311 INFO L225 Difference]: With dead ends: 15422 [2020-10-12 19:12:07,311 INFO L226 Difference]: Without dead ends: 8459 [2020-10-12 19:12:07,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:12:07,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8459 states. [2020-10-12 19:12:08,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8459 to 8453. [2020-10-12 19:12:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8453 states. [2020-10-12 19:12:08,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8453 states to 8453 states and 11343 transitions. [2020-10-12 19:12:08,037 INFO L78 Accepts]: Start accepts. Automaton has 8453 states and 11343 transitions. Word has length 167 [2020-10-12 19:12:08,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:12:08,037 INFO L479 AbstractCegarLoop]: Abstraction has 8453 states and 11343 transitions. [2020-10-12 19:12:08,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:12:08,037 INFO L276 IsEmpty]: Start isEmpty. Operand 8453 states and 11343 transitions. [2020-10-12 19:12:08,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-12 19:12:08,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:12:08,045 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:08,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:12:08,045 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:12:08,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:12:08,046 INFO L82 PathProgramCache]: Analyzing trace with hash 704800407, now seen corresponding path program 1 times [2020-10-12 19:12:08,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:12:08,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015728321] [2020-10-12 19:12:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:12:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:08,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:08,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:08,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:08,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:08,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:08,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:09,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:10,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:11,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:11,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:11,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:13,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:13,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-12 19:12:13,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:12:13,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-12 19:12:13,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:13,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:12:13,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:12:13,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-12 19:12:13,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:13,362 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:12:13,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:12:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:13,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:13,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:13,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:12:13,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:12:13,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:12:13,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:13,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:12:13,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:12:13,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:12:13,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:13,442 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 19:12:13,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015728321] [2020-10-12 19:12:13,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:12:13,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:12:13,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540510897] [2020-10-12 19:12:13,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:12:13,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:12:13,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:12:13,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:12:13,445 INFO L87 Difference]: Start difference. First operand 8453 states and 11343 transitions. Second operand 5 states. [2020-10-12 19:12:17,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:12:17,408 INFO L93 Difference]: Finished difference Result 21768 states and 29202 transitions. [2020-10-12 19:12:17,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:12:17,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 168 [2020-10-12 19:12:17,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:12:17,434 INFO L225 Difference]: With dead ends: 21768 [2020-10-12 19:12:17,434 INFO L226 Difference]: Without dead ends: 13775 [2020-10-12 19:12:17,451 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 19:12:17,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13775 states. [2020-10-12 19:12:18,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13775 to 13772. [2020-10-12 19:12:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13772 states. [2020-10-12 19:12:18,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13772 states to 13772 states and 18166 transitions. [2020-10-12 19:12:18,703 INFO L78 Accepts]: Start accepts. Automaton has 13772 states and 18166 transitions. Word has length 168 [2020-10-12 19:12:18,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:12:18,703 INFO L479 AbstractCegarLoop]: Abstraction has 13772 states and 18166 transitions. [2020-10-12 19:12:18,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:12:18,703 INFO L276 IsEmpty]: Start isEmpty. Operand 13772 states and 18166 transitions. [2020-10-12 19:12:18,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-12 19:12:18,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:12:18,716 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:18,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:12:18,716 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:12:18,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:12:18,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1328885710, now seen corresponding path program 1 times [2020-10-12 19:12:18,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:12:18,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963834940] [2020-10-12 19:12:18,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:12:18,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:18,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:18,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:18,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:18,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:20,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:20,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:20,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:20,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:23,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:23,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-12 19:12:23,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:12:23,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:12:23,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:23,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:12:23,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:12:23,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-12 19:12:23,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:23,988 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:12:23,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:12:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:23,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:23,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:23,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:12:23,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:12:23,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:12:23,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:12:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:12:24,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:12:24,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:24,034 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 19:12:24,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963834940] [2020-10-12 19:12:24,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:12:24,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:12:24,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355213225] [2020-10-12 19:12:24,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:12:24,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:12:24,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:12:24,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:12:24,036 INFO L87 Difference]: Start difference. First operand 13772 states and 18166 transitions. Second operand 5 states. [2020-10-12 19:12:24,270 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 176 [2020-10-12 19:12:28,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:12:28,065 INFO L93 Difference]: Finished difference Result 24501 states and 32384 transitions. [2020-10-12 19:12:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:12:28,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 169 [2020-10-12 19:12:28,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:12:28,087 INFO L225 Difference]: With dead ends: 24501 [2020-10-12 19:12:28,087 INFO L226 Difference]: Without dead ends: 13774 [2020-10-12 19:12:28,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:12:28,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13774 states. [2020-10-12 19:12:29,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13774 to 13772. [2020-10-12 19:12:29,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13772 states. [2020-10-12 19:12:29,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13772 states to 13772 states and 18094 transitions. [2020-10-12 19:12:29,203 INFO L78 Accepts]: Start accepts. Automaton has 13772 states and 18094 transitions. Word has length 169 [2020-10-12 19:12:29,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:12:29,203 INFO L479 AbstractCegarLoop]: Abstraction has 13772 states and 18094 transitions. [2020-10-12 19:12:29,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:12:29,203 INFO L276 IsEmpty]: Start isEmpty. Operand 13772 states and 18094 transitions. [2020-10-12 19:12:29,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-12 19:12:29,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:12:29,216 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:29,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:12:29,217 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:12:29,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:12:29,217 INFO L82 PathProgramCache]: Analyzing trace with hash 983353176, now seen corresponding path program 1 times [2020-10-12 19:12:29,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:12:29,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757144320] [2020-10-12 19:12:29,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:12:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:29,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:29,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:29,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:29,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:29,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:34,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:34,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-12 19:12:34,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:12:34,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 19:12:34,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:34,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:12:34,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 19:12:34,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 19:12:34,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:34,514 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:12:34,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:12:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:34,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:34,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:34,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:12:34,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:12:34,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:12:34,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:12:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:12:34,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:12:34,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:34,549 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 19:12:34,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757144320] [2020-10-12 19:12:34,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:12:34,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:12:34,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922257969] [2020-10-12 19:12:34,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:12:34,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:12:34,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:12:34,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:12:34,551 INFO L87 Difference]: Start difference. First operand 13772 states and 18094 transitions. Second operand 5 states. [2020-10-12 19:12:36,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:12:36,697 INFO L93 Difference]: Finished difference Result 20226 states and 26699 transitions. [2020-10-12 19:12:36,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:12:36,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 170 [2020-10-12 19:12:36,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:12:36,711 INFO L225 Difference]: With dead ends: 20226 [2020-10-12 19:12:36,711 INFO L226 Difference]: Without dead ends: 11620 [2020-10-12 19:12:36,723 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 19:12:36,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11620 states. [2020-10-12 19:12:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11620 to 11612. [2020-10-12 19:12:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11612 states. [2020-10-12 19:12:37,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11612 states to 11612 states and 15230 transitions. [2020-10-12 19:12:37,700 INFO L78 Accepts]: Start accepts. Automaton has 11612 states and 15230 transitions. Word has length 170 [2020-10-12 19:12:37,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:12:37,700 INFO L479 AbstractCegarLoop]: Abstraction has 11612 states and 15230 transitions. [2020-10-12 19:12:37,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:12:37,700 INFO L276 IsEmpty]: Start isEmpty. Operand 11612 states and 15230 transitions. [2020-10-12 19:12:37,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-12 19:12:37,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:12:37,711 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:37,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:12:37,711 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:12:37,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:12:37,711 INFO L82 PathProgramCache]: Analyzing trace with hash -975577825, now seen corresponding path program 1 times [2020-10-12 19:12:37,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:12:37,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118560007] [2020-10-12 19:12:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:12:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:37,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:37,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:37,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:38,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:38,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:38,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:38,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:38,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:39,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:40,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:42,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:42,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-12 19:12:42,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:12:42,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-12 19:12:42,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:42,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 19:12:42,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:12:42,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-12 19:12:42,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:43,264 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:12:43,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:12:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:43,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:43,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:12:43,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:12:43,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:12:43,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:12:43,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:12:43,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:12:43,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:12:43,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:12:43,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:12:43,339 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 19:12:43,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118560007] [2020-10-12 19:12:43,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:12:43,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-12 19:12:43,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883527978] [2020-10-12 19:12:43,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 19:12:43,341 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:12:43,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 19:12:43,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:12:43,342 INFO L87 Difference]: Start difference. First operand 11612 states and 15230 transitions. Second operand 14 states. [2020-10-12 19:12:43,939 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 188 DAG size of output: 185 [2020-10-12 19:12:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:12:54,259 INFO L93 Difference]: Finished difference Result 47485 states and 64934 transitions. [2020-10-12 19:12:54,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 19:12:54,260 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 176 [2020-10-12 19:12:54,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:12:54,302 INFO L225 Difference]: With dead ends: 47485 [2020-10-12 19:12:54,303 INFO L226 Difference]: Without dead ends: 36786 [2020-10-12 19:12:54,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 19:12:54,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36786 states. [2020-10-12 19:12:55,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36786 to 14588. [2020-10-12 19:12:55,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14588 states. [2020-10-12 19:12:55,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14588 states to 14588 states and 19479 transitions. [2020-10-12 19:12:55,843 INFO L78 Accepts]: Start accepts. Automaton has 14588 states and 19479 transitions. Word has length 176 [2020-10-12 19:12:55,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:12:55,843 INFO L479 AbstractCegarLoop]: Abstraction has 14588 states and 19479 transitions. [2020-10-12 19:12:55,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 19:12:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 14588 states and 19479 transitions. [2020-10-12 19:12:55,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-12 19:12:55,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:12:55,855 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:12:55,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:12:55,855 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:12:55,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:12:55,856 INFO L82 PathProgramCache]: Analyzing trace with hash 563691913, now seen corresponding path program 1 times [2020-10-12 19:12:55,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:12:55,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067597491] [2020-10-12 19:12:55,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:12:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:12:55,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:55,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:56,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:56,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:12:56,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:00,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:00,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:00,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:00,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:00,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-12 19:13:00,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:13:00,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-12 19:13:00,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:00,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:13:00,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 19:13:00,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 19:13:00,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:01,403 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:13:01,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:13:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:01,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:01,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:01,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:13:01,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:13:01,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:13:01,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:01,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:13:01,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:13:01,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:13:01,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:01,458 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 19:13:01,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067597491] [2020-10-12 19:13:01,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:13:01,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 19:13:01,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110186522] [2020-10-12 19:13:01,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:13:01,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:13:01,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:13:01,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:13:01,460 INFO L87 Difference]: Start difference. First operand 14588 states and 19479 transitions. Second operand 15 states. [2020-10-12 19:13:01,855 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification that was a NOOP. DAG size: 203 [2020-10-12 19:13:07,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:13:07,868 INFO L93 Difference]: Finished difference Result 28265 states and 38274 transitions. [2020-10-12 19:13:07,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 19:13:07,869 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 176 [2020-10-12 19:13:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:13:07,898 INFO L225 Difference]: With dead ends: 28265 [2020-10-12 19:13:07,898 INFO L226 Difference]: Without dead ends: 25143 [2020-10-12 19:13:07,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2020-10-12 19:13:07,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25143 states. [2020-10-12 19:13:09,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25143 to 14946. [2020-10-12 19:13:09,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14946 states. [2020-10-12 19:13:09,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14946 states to 14946 states and 19887 transitions. [2020-10-12 19:13:09,588 INFO L78 Accepts]: Start accepts. Automaton has 14946 states and 19887 transitions. Word has length 176 [2020-10-12 19:13:09,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:13:09,588 INFO L479 AbstractCegarLoop]: Abstraction has 14946 states and 19887 transitions. [2020-10-12 19:13:09,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:13:09,589 INFO L276 IsEmpty]: Start isEmpty. Operand 14946 states and 19887 transitions. [2020-10-12 19:13:09,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-12 19:13:09,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:13:09,598 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:13:09,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:13:09,598 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:13:09,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:13:09,598 INFO L82 PathProgramCache]: Analyzing trace with hash 453955042, now seen corresponding path program 1 times [2020-10-12 19:13:09,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:13:09,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407723702] [2020-10-12 19:13:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:13:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:09,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:09,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:09,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:09,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:14,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:14,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:14,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:14,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:14,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-12 19:13:14,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:13:14,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:13:14,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:14,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:13:14,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:13:14,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-12 19:13:14,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:14,965 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 26 [2020-10-12 19:13:15,535 WARN L193 SmtUtils]: Spent 456.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 67 [2020-10-12 19:13:15,950 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:13:15,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:13:15,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:15,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:15,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:15,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:13:15,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:13:15,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:13:15,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:15,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:13:15,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:13:15,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:13:15,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:16,013 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 19:13:16,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407723702] [2020-10-12 19:13:16,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:13:16,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 19:13:16,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11098955] [2020-10-12 19:13:16,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:13:16,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:13:16,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:13:16,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:13:16,016 INFO L87 Difference]: Start difference. First operand 14946 states and 19887 transitions. Second operand 15 states. [2020-10-12 19:13:16,295 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-12 19:13:17,590 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 72 [2020-10-12 19:13:18,000 WARN L193 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-10-12 19:13:26,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:13:26,033 INFO L93 Difference]: Finished difference Result 32758 states and 45316 transitions. [2020-10-12 19:13:26,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 19:13:26,034 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 176 [2020-10-12 19:13:26,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:13:26,070 INFO L225 Difference]: With dead ends: 32758 [2020-10-12 19:13:26,071 INFO L226 Difference]: Without dead ends: 27230 [2020-10-12 19:13:26,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-10-12 19:13:26,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27230 states. [2020-10-12 19:13:27,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27230 to 15058. [2020-10-12 19:13:27,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15058 states. [2020-10-12 19:13:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15058 states to 15058 states and 20023 transitions. [2020-10-12 19:13:27,907 INFO L78 Accepts]: Start accepts. Automaton has 15058 states and 20023 transitions. Word has length 176 [2020-10-12 19:13:27,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:13:27,908 INFO L479 AbstractCegarLoop]: Abstraction has 15058 states and 20023 transitions. [2020-10-12 19:13:27,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:13:27,908 INFO L276 IsEmpty]: Start isEmpty. Operand 15058 states and 20023 transitions. [2020-10-12 19:13:27,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-12 19:13:27,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:13:27,916 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:13:27,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:13:27,917 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:13:27,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:13:27,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1909853343, now seen corresponding path program 1 times [2020-10-12 19:13:27,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:13:27,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661631161] [2020-10-12 19:13:27,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:13:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:27,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:27,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:28,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:28,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:28,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:28,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:32,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:32,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-12 19:13:32,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:13:32,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 19:13:32,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:32,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:13:32,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 62 [2020-10-12 19:13:32,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-12 19:13:32,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:33,895 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:13:33,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:13:33,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:33,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:33,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:33,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:13:33,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:13:33,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:13:33,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:33,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:13:33,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:13:33,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:13:33,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:33,980 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 19:13:33,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661631161] [2020-10-12 19:13:33,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:13:33,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 19:13:33,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459337302] [2020-10-12 19:13:33,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:13:33,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:13:33,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:13:33,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:13:33,983 INFO L87 Difference]: Start difference. First operand 15058 states and 20023 transitions. Second operand 15 states. [2020-10-12 19:13:34,247 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-10-12 19:13:35,188 WARN L193 SmtUtils]: Spent 865.00 ms on a formula simplification. DAG size of input: 253 DAG size of output: 234 [2020-10-12 19:13:48,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:13:48,853 INFO L93 Difference]: Finished difference Result 34268 states and 48568 transitions. [2020-10-12 19:13:48,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 19:13:48,854 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 176 [2020-10-12 19:13:48,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:13:48,892 INFO L225 Difference]: With dead ends: 34268 [2020-10-12 19:13:48,892 INFO L226 Difference]: Without dead ends: 31982 [2020-10-12 19:13:48,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=389, Invalid=2061, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 19:13:48,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31982 states. [2020-10-12 19:13:50,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31982 to 15404. [2020-10-12 19:13:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15404 states. [2020-10-12 19:13:50,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15404 states to 15404 states and 20437 transitions. [2020-10-12 19:13:50,879 INFO L78 Accepts]: Start accepts. Automaton has 15404 states and 20437 transitions. Word has length 176 [2020-10-12 19:13:50,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:13:50,880 INFO L479 AbstractCegarLoop]: Abstraction has 15404 states and 20437 transitions. [2020-10-12 19:13:50,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:13:50,880 INFO L276 IsEmpty]: Start isEmpty. Operand 15404 states and 20437 transitions. [2020-10-12 19:13:50,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-12 19:13:50,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:13:50,889 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:13:50,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:13:50,889 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:13:50,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:13:50,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1254571927, now seen corresponding path program 1 times [2020-10-12 19:13:50,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:13:50,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336003047] [2020-10-12 19:13:50,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:13:50,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:50,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:50,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:51,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:51,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:52,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:52,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:53,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:53,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:55,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:55,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-12 19:13:55,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:13:55,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:13:55,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:55,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:13:55,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-12 19:13:55,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-12 19:13:55,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:56,184 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:13:56,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:13:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:13:56,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:13:56,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:13:56,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:13:56,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:13:56,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:13:56,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:13:56,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:13:56,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:13:56,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:13:56,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:13:56,229 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 19:13:56,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336003047] [2020-10-12 19:13:56,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:13:56,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:13:56,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986604027] [2020-10-12 19:13:56,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:13:56,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:13:56,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:13:56,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:13:56,231 INFO L87 Difference]: Start difference. First operand 15404 states and 20437 transitions. Second operand 6 states. [2020-10-12 19:13:56,491 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-12 19:14:02,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:14:02,169 INFO L93 Difference]: Finished difference Result 29151 states and 41611 transitions. [2020-10-12 19:14:02,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:14:02,170 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 176 [2020-10-12 19:14:02,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:14:02,196 INFO L225 Difference]: With dead ends: 29151 [2020-10-12 19:14:02,196 INFO L226 Difference]: Without dead ends: 24470 [2020-10-12 19:14:02,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:14:02,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24470 states. [2020-10-12 19:14:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24470 to 24392. [2020-10-12 19:14:05,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24392 states. [2020-10-12 19:14:05,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24392 states to 24392 states and 33996 transitions. [2020-10-12 19:14:05,922 INFO L78 Accepts]: Start accepts. Automaton has 24392 states and 33996 transitions. Word has length 176 [2020-10-12 19:14:05,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:14:05,922 INFO L479 AbstractCegarLoop]: Abstraction has 24392 states and 33996 transitions. [2020-10-12 19:14:05,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:14:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand 24392 states and 33996 transitions. [2020-10-12 19:14:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-12 19:14:05,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:14:05,934 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:14:05,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 19:14:05,934 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:14:05,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:14:05,935 INFO L82 PathProgramCache]: Analyzing trace with hash 2143799712, now seen corresponding path program 1 times [2020-10-12 19:14:05,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:14:05,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028571214] [2020-10-12 19:14:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:14:05,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:06,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:06,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:06,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:06,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:07,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:07,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:08,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:08,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:08,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:08,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:09,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:09,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:10,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:10,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:10,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-12 19:14:10,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 19:14:10,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 19:14:10,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:10,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 19:14:10,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:14:10,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-12 19:14:10,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:14:11,461 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 25 [2020-10-12 19:14:12,066 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 19:14:12,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:14:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:14:12,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:14:12,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:14:12,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:14:12,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:14:12,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:14:12,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:14:12,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:14:12,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:14:12,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:14:12,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:14:12,176 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 19:14:12,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028571214] [2020-10-12 19:14:12,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:14:12,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-12 19:14:12,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047655969] [2020-10-12 19:14:12,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 19:14:12,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:14:12,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 19:14:12,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-12 19:14:12,178 INFO L87 Difference]: Start difference. First operand 24392 states and 33996 transitions. Second operand 17 states. [2020-10-12 19:14:12,496 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-12 19:14:13,470 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-10-12 19:14:13,695 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-12 19:14:14,060 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-12 19:14:14,413 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-12 19:14:14,649 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 29 [2020-10-12 19:14:15,761 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-10-12 19:14:16,041 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2020-10-12 19:14:16,221 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-12 19:14:16,513 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37