/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_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:54:54,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:54:54,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:54:54,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:54:54,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:54:54,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:54:54,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:54:54,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:54:54,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:54:54,844 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:54:54,845 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:54:54,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:54:54,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:54:54,848 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:54:54,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:54:54,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:54:54,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:54:54,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:54:54,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:54:54,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:54:54,858 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:54:54,859 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:54:54,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:54:54,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:54:54,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:54:54,864 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:54:54,864 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:54:54,865 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:54:54,866 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:54:54,867 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:54:54,867 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:54:54,868 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:54:54,869 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:54:54,870 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:54:54,871 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:54:54,871 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:54:54,872 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:54:54,872 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:54:54,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:54:54,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:54:54,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:54:54,875 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 19:54:54,901 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:54:54,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:54:54,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:54:54,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:54:54,903 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:54:54,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:54:54,903 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:54:54,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:54:54,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:54:54,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:54:54,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:54:54,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:54:54,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:54:54,905 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:54:54,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:54:54,905 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:54:54,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:54:54,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:54:54,906 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:54:54,906 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:54:54,906 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:54:54,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:54:54,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:54:54,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:54:54,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:54:54,907 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:54:54,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:54:54,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:54:54,908 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:54:54,908 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 19:54:55,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:54:55,236 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:54:55,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:54:55,249 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:54:55,251 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:54:55,251 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:54:55,313 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7bc573bd9/48cfa3a764fe4688878f0fede5eb29d3/FLAG2ddb6a3a6 [2020-10-12 19:54:55,836 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:54:55,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:54:55,847 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7bc573bd9/48cfa3a764fe4688878f0fede5eb29d3/FLAG2ddb6a3a6 [2020-10-12 19:54:56,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7bc573bd9/48cfa3a764fe4688878f0fede5eb29d3 [2020-10-12 19:54:56,194 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:54:56,196 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:54:56,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:54:56,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:54:56,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:54:56,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:54:56" (1/1) ... [2020-10-12 19:54:56,205 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@391177e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:54:56, skipping insertion in model container [2020-10-12 19:54:56,205 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:54:56" (1/1) ... [2020-10-12 19:54:56,213 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:54:56,265 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:54:56,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:54:56,528 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:54:56,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:54:56,710 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:54:56,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:54:56 WrapperNode [2020-10-12 19:54:56,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:54:56,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:54:56,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:54:56,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:54:56,727 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:54:56" (1/1) ... [2020-10-12 19:54:56,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:54:56" (1/1) ... [2020-10-12 19:54:56,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:54:56" (1/1) ... [2020-10-12 19:54:56,737 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:54:56" (1/1) ... [2020-10-12 19:54:56,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:54:56" (1/1) ... [2020-10-12 19:54:56,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:54:56" (1/1) ... [2020-10-12 19:54:56,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:54:56" (1/1) ... [2020-10-12 19:54:56,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:54:56,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:54:56,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:54:56,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:54:56,764 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:54:56" (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 19:54:56,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:54:56,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:54:56,829 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:54:56,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:54:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:54:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:54:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:54:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 19:54:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:54:56,830 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:54:56,831 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:54:56,831 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:54:56,831 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:54:56,831 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:54:56,831 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:54:56,831 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:54:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:54:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:54:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:54:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:54:56,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:54:57,415 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:54:57,415 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:54:57,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:54:57 BoogieIcfgContainer [2020-10-12 19:54:57,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:54:57,421 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:54:57,421 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:54:57,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:54:57,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:54:56" (1/3) ... [2020-10-12 19:54:57,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de2451c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:54:57, skipping insertion in model container [2020-10-12 19:54:57,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:54:56" (2/3) ... [2020-10-12 19:54:57,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3de2451c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:54:57, skipping insertion in model container [2020-10-12 19:54:57,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:54:57" (3/3) ... [2020-10-12 19:54:57,428 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:54:57,439 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:54:57,447 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:54:57,461 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:54:57,482 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:54:57,482 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:54:57,482 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:54:57,483 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:54:57,483 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:54:57,483 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:54:57,483 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:54:57,484 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:54:57,504 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2020-10-12 19:54:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 19:54:57,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:57,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:54:57,515 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:57,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:57,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1236358141, now seen corresponding path program 1 times [2020-10-12 19:54:57,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:57,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24954950] [2020-10-12 19:54:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:57,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:57,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:58,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:58,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:58,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 19:54:58,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:54:58,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1055 [2020-10-12 19:54:58,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:58,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:54:58,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:54:58,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 19:54:58,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 19:54:59,034 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-12 19:54:59,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:54:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:59,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:59,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:54:59,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:54:59,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:54:59,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 19:54:59,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:54:59,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:54:59,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:54:59,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:54:59,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:54:59,077 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 19:54:59,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24954950] [2020-10-12 19:54:59,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:54:59,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:54:59,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238882180] [2020-10-12 19:54:59,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:54:59,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:54:59,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:54:59,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:54:59,106 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 6 states. [2020-10-12 19:54:59,317 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2020-10-12 19:54:59,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:54:59,780 INFO L93 Difference]: Finished difference Result 339 states and 527 transitions. [2020-10-12 19:54:59,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:54:59,783 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-12 19:54:59,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:54:59,798 INFO L225 Difference]: With dead ends: 339 [2020-10-12 19:54:59,799 INFO L226 Difference]: Without dead ends: 260 [2020-10-12 19:54:59,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:54:59,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-12 19:54:59,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 140. [2020-10-12 19:54:59,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-12 19:54:59,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 207 transitions. [2020-10-12 19:54:59,869 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 207 transitions. Word has length 41 [2020-10-12 19:54:59,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:54:59,870 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 207 transitions. [2020-10-12 19:54:59,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:54:59,870 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 207 transitions. [2020-10-12 19:54:59,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 19:54:59,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:54:59,873 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] [2020-10-12 19:54:59,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:54:59,874 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:54:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:54:59,874 INFO L82 PathProgramCache]: Analyzing trace with hash 309070506, now seen corresponding path program 1 times [2020-10-12 19:54:59,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:54:59,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318703549] [2020-10-12 19:54:59,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:54:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:54:59,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:54:59,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:00,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:00,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:00,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 19:55:00,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:55:00,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 484 [2020-10-12 19:55:00,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:00,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:55:00,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 19:55:00,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 19:55:00,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:00,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:00,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:00,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:00,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:00,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:00,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:55:00,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:00,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:00,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:00,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:00,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:00,540 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 19:55:00,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318703549] [2020-10-12 19:55:00,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:00,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:55:00,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449605868] [2020-10-12 19:55:00,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:55:00,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:00,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:55:00,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:55:00,545 INFO L87 Difference]: Start difference. First operand 140 states and 207 transitions. Second operand 5 states. [2020-10-12 19:55:01,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:01,084 INFO L93 Difference]: Finished difference Result 260 states and 394 transitions. [2020-10-12 19:55:01,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:55:01,085 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-10-12 19:55:01,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:01,088 INFO L225 Difference]: With dead ends: 260 [2020-10-12 19:55:01,088 INFO L226 Difference]: Without dead ends: 258 [2020-10-12 19:55:01,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 19:55:01,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-12 19:55:01,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 144. [2020-10-12 19:55:01,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-12 19:55:01,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 211 transitions. [2020-10-12 19:55:01,107 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 211 transitions. Word has length 42 [2020-10-12 19:55:01,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:01,108 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 211 transitions. [2020-10-12 19:55:01,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:55:01,108 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 211 transitions. [2020-10-12 19:55:01,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 19:55:01,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:01,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:01,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:55:01,111 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:01,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:01,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1000870802, now seen corresponding path program 1 times [2020-10-12 19:55:01,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:01,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778415644] [2020-10-12 19:55:01,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:01,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:01,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:01,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:01,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:01,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 19:55:01,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:55:01,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 422 [2020-10-12 19:55:01,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:01,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:01,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 19:55:01,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 19:55:01,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:01,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:01,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:01,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:01,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:01,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:01,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:55:01,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:01,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:01,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:01,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:01,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:55:01,726 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 19:55:01,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778415644] [2020-10-12 19:55:01,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:01,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:55:01,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690207837] [2020-10-12 19:55:01,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:55:01,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:01,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:55:01,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:55:01,730 INFO L87 Difference]: Start difference. First operand 144 states and 211 transitions. Second operand 4 states. [2020-10-12 19:55:01,889 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-12 19:55:02,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:02,274 INFO L93 Difference]: Finished difference Result 352 states and 533 transitions. [2020-10-12 19:55:02,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:55:02,275 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-12 19:55:02,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:02,277 INFO L225 Difference]: With dead ends: 352 [2020-10-12 19:55:02,277 INFO L226 Difference]: Without dead ends: 232 [2020-10-12 19:55:02,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:55:02,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-12 19:55:02,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 230. [2020-10-12 19:55:02,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-12 19:55:02,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 343 transitions. [2020-10-12 19:55:02,320 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 343 transitions. Word has length 43 [2020-10-12 19:55:02,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:02,320 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 343 transitions. [2020-10-12 19:55:02,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:55:02,320 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 343 transitions. [2020-10-12 19:55:02,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 19:55:02,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:02,331 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] [2020-10-12 19:55:02,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:55:02,331 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:02,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:02,332 INFO L82 PathProgramCache]: Analyzing trace with hash 92987132, now seen corresponding path program 1 times [2020-10-12 19:55:02,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:02,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491461648] [2020-10-12 19:55:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:02,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:02,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:02,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:02,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 19:55:02,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 19:55:02,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-12 19:55:02,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:02,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:02,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:55:02,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 19:55:02,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 19:55:02,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:02,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:02,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:02,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:02,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:02,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:02,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:55:02,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:02,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:02,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:02,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:02,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:55:02,675 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 19:55:02,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491461648] [2020-10-12 19:55:02,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:02,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:55:02,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198422747] [2020-10-12 19:55:02,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:55:02,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:02,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:55:02,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:55:02,689 INFO L87 Difference]: Start difference. First operand 230 states and 343 transitions. Second operand 4 states. [2020-10-12 19:55:03,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:03,103 INFO L93 Difference]: Finished difference Result 614 states and 933 transitions. [2020-10-12 19:55:03,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:55:03,105 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-12 19:55:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:03,110 INFO L225 Difference]: With dead ends: 614 [2020-10-12 19:55:03,111 INFO L226 Difference]: Without dead ends: 408 [2020-10-12 19:55:03,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:55:03,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-12 19:55:03,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 402. [2020-10-12 19:55:03,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-12 19:55:03,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 601 transitions. [2020-10-12 19:55:03,158 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 601 transitions. Word has length 44 [2020-10-12 19:55:03,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:03,159 INFO L479 AbstractCegarLoop]: Abstraction has 402 states and 601 transitions. [2020-10-12 19:55:03,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:55:03,160 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 601 transitions. [2020-10-12 19:55:03,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 19:55:03,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:03,162 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] [2020-10-12 19:55:03,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:55:03,163 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:03,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:03,163 INFO L82 PathProgramCache]: Analyzing trace with hash 68329175, now seen corresponding path program 1 times [2020-10-12 19:55:03,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:03,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278396001] [2020-10-12 19:55:03,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:03,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:03,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:03,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:03,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:04,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:04,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 19:55:04,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:55:04,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-12 19:55:04,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:04,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:55:04,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:04,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 19:55:04,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:04,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:04,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:04,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:04,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:04,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:04,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 19:55:04,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:04,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:04,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:04,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:04,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:04,275 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 19:55:04,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278396001] [2020-10-12 19:55:04,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:04,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:55:04,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357461843] [2020-10-12 19:55:04,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:55:04,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:04,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:55:04,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:55:04,277 INFO L87 Difference]: Start difference. First operand 402 states and 601 transitions. Second operand 7 states. [2020-10-12 19:55:04,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:04,902 INFO L93 Difference]: Finished difference Result 1176 states and 1761 transitions. [2020-10-12 19:55:04,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:55:04,903 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-10-12 19:55:04,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:04,910 INFO L225 Difference]: With dead ends: 1176 [2020-10-12 19:55:04,910 INFO L226 Difference]: Without dead ends: 798 [2020-10-12 19:55:04,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:55:04,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2020-10-12 19:55:04,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 427. [2020-10-12 19:55:04,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-12 19:55:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 637 transitions. [2020-10-12 19:55:04,962 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 637 transitions. Word has length 45 [2020-10-12 19:55:04,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:04,962 INFO L479 AbstractCegarLoop]: Abstraction has 427 states and 637 transitions. [2020-10-12 19:55:04,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:55:04,963 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 637 transitions. [2020-10-12 19:55:04,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 19:55:04,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:04,964 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] [2020-10-12 19:55:04,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:55:04,964 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:04,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:04,965 INFO L82 PathProgramCache]: Analyzing trace with hash -243133671, now seen corresponding path program 1 times [2020-10-12 19:55:04,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:04,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78157615] [2020-10-12 19:55:04,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:04,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:05,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:05,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:05,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:05,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:05,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 19:55:05,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 19:55:05,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 440 [2020-10-12 19:55:05,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:05,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:55:05,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:55:05,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 19:55:05,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:05,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:05,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:05,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:05,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:05,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:05,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:55:05,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:05,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:05,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:05,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:05,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:55:05,635 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 19:55:05,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78157615] [2020-10-12 19:55:05,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:05,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:55:05,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5134267] [2020-10-12 19:55:05,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:55:05,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:05,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:55:05,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:55:05,637 INFO L87 Difference]: Start difference. First operand 427 states and 637 transitions. Second operand 5 states. [2020-10-12 19:55:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:06,207 INFO L93 Difference]: Finished difference Result 837 states and 1268 transitions. [2020-10-12 19:55:06,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:55:06,208 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-12 19:55:06,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:06,212 INFO L225 Difference]: With dead ends: 837 [2020-10-12 19:55:06,212 INFO L226 Difference]: Without dead ends: 631 [2020-10-12 19:55:06,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:55:06,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-10-12 19:55:06,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 623. [2020-10-12 19:55:06,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 623 states. [2020-10-12 19:55:06,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 935 transitions. [2020-10-12 19:55:06,270 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 935 transitions. Word has length 46 [2020-10-12 19:55:06,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:06,270 INFO L479 AbstractCegarLoop]: Abstraction has 623 states and 935 transitions. [2020-10-12 19:55:06,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:55:06,270 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 935 transitions. [2020-10-12 19:55:06,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-12 19:55:06,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:06,271 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] [2020-10-12 19:55:06,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:55:06,272 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:06,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:06,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1120822233, now seen corresponding path program 1 times [2020-10-12 19:55:06,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:06,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105354693] [2020-10-12 19:55:06,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:06,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:06,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:06,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:06,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:06,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:07,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:08,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:08,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 19:55:08,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:55:08,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1885 [2020-10-12 19:55:08,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:08,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:55:08,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:08,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 19:55:08,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:55:08,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:08,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:08,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:08,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:08,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:08,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:08,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-12 19:55:08,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:08,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:08,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:08,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:08,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:55:08,458 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 19:55:08,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105354693] [2020-10-12 19:55:08,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:55:08,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:55:08,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455854998] [2020-10-12 19:55:08,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:55:08,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:08,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:55:08,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:55:08,462 INFO L87 Difference]: Start difference. First operand 623 states and 935 transitions. Second operand 7 states. [2020-10-12 19:55:08,603 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-12 19:55:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:09,278 INFO L93 Difference]: Finished difference Result 1561 states and 2364 transitions. [2020-10-12 19:55:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:55:09,279 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-10-12 19:55:09,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:09,288 INFO L225 Difference]: With dead ends: 1561 [2020-10-12 19:55:09,288 INFO L226 Difference]: Without dead ends: 1172 [2020-10-12 19:55:09,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:55:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2020-10-12 19:55:09,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 616. [2020-10-12 19:55:09,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 616 states. [2020-10-12 19:55:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 923 transitions. [2020-10-12 19:55:09,365 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 923 transitions. Word has length 47 [2020-10-12 19:55:09,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:09,365 INFO L479 AbstractCegarLoop]: Abstraction has 616 states and 923 transitions. [2020-10-12 19:55:09,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:55:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 923 transitions. [2020-10-12 19:55:09,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 19:55:09,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:09,367 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:09,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:55:09,367 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:09,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:09,368 INFO L82 PathProgramCache]: Analyzing trace with hash 334048559, now seen corresponding path program 1 times [2020-10-12 19:55:09,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:09,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157348419] [2020-10-12 19:55:09,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:09,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:09,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:09,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:09,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:09,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:10,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:12,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:12,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 19:55:12,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:55:12,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2867 [2020-10-12 19:55:12,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:12,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:55:12,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:12,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:55:12,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:12,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:12,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:12,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:12,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:12,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:12,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-12 19:55:12,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:12,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:12,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:12,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:12,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:55:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:12,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157348419] [2020-10-12 19:55:12,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:55:12,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:55:12,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410229543] [2020-10-12 19:55:12,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:55:12,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:12,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:55:12,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:55:12,448 INFO L87 Difference]: Start difference. First operand 616 states and 923 transitions. Second operand 8 states. [2020-10-12 19:55:12,597 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2020-10-12 19:55:13,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:13,482 INFO L93 Difference]: Finished difference Result 2994 states and 4493 transitions. [2020-10-12 19:55:13,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:55:13,483 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-10-12 19:55:13,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:13,500 INFO L225 Difference]: With dead ends: 2994 [2020-10-12 19:55:13,500 INFO L226 Difference]: Without dead ends: 2702 [2020-10-12 19:55:13,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-12 19:55:13,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2702 states. [2020-10-12 19:55:13,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2702 to 1360. [2020-10-12 19:55:13,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1360 states. [2020-10-12 19:55:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2066 transitions. [2020-10-12 19:55:13,669 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2066 transitions. Word has length 62 [2020-10-12 19:55:13,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:13,670 INFO L479 AbstractCegarLoop]: Abstraction has 1360 states and 2066 transitions. [2020-10-12 19:55:13,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:55:13,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2066 transitions. [2020-10-12 19:55:13,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 19:55:13,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:13,673 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:13,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:55:13,673 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:13,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:13,674 INFO L82 PathProgramCache]: Analyzing trace with hash -152787272, now seen corresponding path program 1 times [2020-10-12 19:55:13,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:13,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055299700] [2020-10-12 19:55:13,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:13,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:13,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:13,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:13,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:13,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:14,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:15,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:18,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:18,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 19:55:18,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:55:18,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 19:55:18,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:18,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:55:18,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:18,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 19:55:18,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:18,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:18,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:18,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:18,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:18,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:18,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:55:18,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:18,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:18,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:18,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:18,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:18,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055299700] [2020-10-12 19:55:18,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:55:18,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:55:18,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137138709] [2020-10-12 19:55:18,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:55:18,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:18,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:55:18,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:55:18,945 INFO L87 Difference]: Start difference. First operand 1360 states and 2066 transitions. Second operand 8 states. [2020-10-12 19:55:20,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:20,109 INFO L93 Difference]: Finished difference Result 5616 states and 8478 transitions. [2020-10-12 19:55:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:55:20,110 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-10-12 19:55:20,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:20,132 INFO L225 Difference]: With dead ends: 5616 [2020-10-12 19:55:20,133 INFO L226 Difference]: Without dead ends: 4302 [2020-10-12 19:55:20,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:55:20,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2020-10-12 19:55:20,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 2172. [2020-10-12 19:55:20,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2172 states. [2020-10-12 19:55:20,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2172 states to 2172 states and 3198 transitions. [2020-10-12 19:55:20,486 INFO L78 Accepts]: Start accepts. Automaton has 2172 states and 3198 transitions. Word has length 62 [2020-10-12 19:55:20,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:20,486 INFO L479 AbstractCegarLoop]: Abstraction has 2172 states and 3198 transitions. [2020-10-12 19:55:20,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:55:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 2172 states and 3198 transitions. [2020-10-12 19:55:20,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 19:55:20,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:20,489 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:20,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:55:20,490 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:20,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:20,490 INFO L82 PathProgramCache]: Analyzing trace with hash -593083795, now seen corresponding path program 1 times [2020-10-12 19:55:20,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:20,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762286657] [2020-10-12 19:55:20,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:20,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:20,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:20,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:20,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:20,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:21,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:23,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:23,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 19:55:23,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:55:23,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2975 [2020-10-12 19:55:23,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:23,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:55:23,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:23,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 19:55:23,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:23,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:23,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:23,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:23,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:23,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:23,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:23,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 19:55:23,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:23,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:23,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:23,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:23,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:55:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:23,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762286657] [2020-10-12 19:55:23,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:55:23,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 19:55:23,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213401010] [2020-10-12 19:55:23,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:55:23,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:23,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:55:23,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:55:23,794 INFO L87 Difference]: Start difference. First operand 2172 states and 3198 transitions. Second operand 8 states. [2020-10-12 19:55:23,935 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 101 [2020-10-12 19:55:24,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:24,977 INFO L93 Difference]: Finished difference Result 6380 states and 9334 transitions. [2020-10-12 19:55:24,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:55:24,978 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 64 [2020-10-12 19:55:24,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:24,998 INFO L225 Difference]: With dead ends: 6380 [2020-10-12 19:55:24,998 INFO L226 Difference]: Without dead ends: 4254 [2020-10-12 19:55:25,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:55:25,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4254 states. [2020-10-12 19:55:25,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4254 to 2436. [2020-10-12 19:55:25,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2436 states. [2020-10-12 19:55:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2436 states to 2436 states and 3454 transitions. [2020-10-12 19:55:25,300 INFO L78 Accepts]: Start accepts. Automaton has 2436 states and 3454 transitions. Word has length 64 [2020-10-12 19:55:25,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:25,300 INFO L479 AbstractCegarLoop]: Abstraction has 2436 states and 3454 transitions. [2020-10-12 19:55:25,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:55:25,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2436 states and 3454 transitions. [2020-10-12 19:55:25,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:55:25,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:25,303 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:25,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:55:25,304 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:25,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:25,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1370049538, now seen corresponding path program 1 times [2020-10-12 19:55:25,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:25,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75017176] [2020-10-12 19:55:25,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:25,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:25,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:25,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:25,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:25,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:26,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:26,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:55:26,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:55:26,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1067 [2020-10-12 19:55:26,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:26,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:55:26,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:55:26,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:55:26,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:26,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:26,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:26,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:26,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:26,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:26,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:55:26,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:26,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:26,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:26,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:26,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:55:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:26,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75017176] [2020-10-12 19:55:26,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:55:26,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 19:55:26,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212472598] [2020-10-12 19:55:26,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:55:26,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:26,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:55:26,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:55:26,546 INFO L87 Difference]: Start difference. First operand 2436 states and 3454 transitions. Second operand 6 states. [2020-10-12 19:55:27,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:27,357 INFO L93 Difference]: Finished difference Result 4100 states and 5870 transitions. [2020-10-12 19:55:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:55:27,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-12 19:55:27,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:27,373 INFO L225 Difference]: With dead ends: 4100 [2020-10-12 19:55:27,374 INFO L226 Difference]: Without dead ends: 3250 [2020-10-12 19:55:27,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:55:27,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-10-12 19:55:27,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 3224. [2020-10-12 19:55:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3224 states. [2020-10-12 19:55:27,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3224 states to 3224 states and 4570 transitions. [2020-10-12 19:55:27,662 INFO L78 Accepts]: Start accepts. Automaton has 3224 states and 4570 transitions. Word has length 65 [2020-10-12 19:55:27,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:27,663 INFO L479 AbstractCegarLoop]: Abstraction has 3224 states and 4570 transitions. [2020-10-12 19:55:27,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:55:27,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3224 states and 4570 transitions. [2020-10-12 19:55:27,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:55:27,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:27,666 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:27,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:55:27,667 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:27,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:27,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1259815801, now seen corresponding path program 1 times [2020-10-12 19:55:27,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:27,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425191947] [2020-10-12 19:55:27,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:27,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:27,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:27,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:27,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:27,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:27,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:27,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:29,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:29,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:29,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:32,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:32,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:55:32,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:55:32,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:55:32,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:55:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 19:55:32,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:32,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:32,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:32,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:32,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:32,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:32,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:55:32,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:32,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:32,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:32,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:32,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:32,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425191947] [2020-10-12 19:55:32,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:55:32,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 19:55:32,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055916815] [2020-10-12 19:55:32,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:55:32,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:32,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:55:32,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:55:32,991 INFO L87 Difference]: Start difference. First operand 3224 states and 4570 transitions. Second operand 12 states. [2020-10-12 19:55:37,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:37,113 INFO L93 Difference]: Finished difference Result 26763 states and 37556 transitions. [2020-10-12 19:55:37,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 19:55:37,113 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-10-12 19:55:37,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:37,189 INFO L225 Difference]: With dead ends: 26763 [2020-10-12 19:55:37,190 INFO L226 Difference]: Without dead ends: 23579 [2020-10-12 19:55:37,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=464, Invalid=1516, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 19:55:37,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23579 states. [2020-10-12 19:55:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23579 to 8171. [2020-10-12 19:55:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8171 states. [2020-10-12 19:55:38,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8171 states to 8171 states and 11501 transitions. [2020-10-12 19:55:38,191 INFO L78 Accepts]: Start accepts. Automaton has 8171 states and 11501 transitions. Word has length 65 [2020-10-12 19:55:38,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:38,191 INFO L479 AbstractCegarLoop]: Abstraction has 8171 states and 11501 transitions. [2020-10-12 19:55:38,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:55:38,192 INFO L276 IsEmpty]: Start isEmpty. Operand 8171 states and 11501 transitions. [2020-10-12 19:55:38,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:55:38,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:38,198 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:38,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:55:38,198 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:38,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:38,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1129925794, now seen corresponding path program 1 times [2020-10-12 19:55:38,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:38,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458979983] [2020-10-12 19:55:38,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:38,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:38,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:38,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:38,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:38,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:38,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:39,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:41,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:41,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:55:41,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:55:41,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2967 [2020-10-12 19:55:41,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:41,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:55:41,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:55:41,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:55:41,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:41,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:41,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:41,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:41,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:41,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:41,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:55:41,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:41,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:55:41,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:41,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:55:41,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:41,527 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:41,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458979983] [2020-10-12 19:55:41,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:55:41,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:55:41,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916894264] [2020-10-12 19:55:41,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:55:41,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:41,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:55:41,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:55:41,529 INFO L87 Difference]: Start difference. First operand 8171 states and 11501 transitions. Second operand 10 states. [2020-10-12 19:55:41,835 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 114 [2020-10-12 19:55:46,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:55:46,557 INFO L93 Difference]: Finished difference Result 26371 states and 36516 transitions. [2020-10-12 19:55:46,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:55:46,557 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-10-12 19:55:46,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:55:46,601 INFO L225 Difference]: With dead ends: 26371 [2020-10-12 19:55:46,601 INFO L226 Difference]: Without dead ends: 22205 [2020-10-12 19:55:46,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-10-12 19:55:46,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22205 states. [2020-10-12 19:55:47,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22205 to 9731. [2020-10-12 19:55:47,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9731 states. [2020-10-12 19:55:48,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9731 states to 9731 states and 13620 transitions. [2020-10-12 19:55:48,008 INFO L78 Accepts]: Start accepts. Automaton has 9731 states and 13620 transitions. Word has length 65 [2020-10-12 19:55:48,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:55:48,009 INFO L479 AbstractCegarLoop]: Abstraction has 9731 states and 13620 transitions. [2020-10-12 19:55:48,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:55:48,009 INFO L276 IsEmpty]: Start isEmpty. Operand 9731 states and 13620 transitions. [2020-10-12 19:55:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:55:48,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:55:48,011 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:55:48,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:55:48,012 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:55:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:55:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1559410336, now seen corresponding path program 1 times [2020-10-12 19:55:48,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:55:48,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [293902559] [2020-10-12 19:55:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:55:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:48,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:48,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:48,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:48,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:48,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:49,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:49,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:49,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:49,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:53,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:53,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:55:53,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:55:53,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:55:53,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:53,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:55:53,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:55:53,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 19:55:53,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:53,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:55:53,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:55:53,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:55:53,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:55:53,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:55:53,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:55:53,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:55:53,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:55:53,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:55:53,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:55:53,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:55:53,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:55:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:55:53,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [293902559] [2020-10-12 19:55:53,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:55:53,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 19:55:53,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946699938] [2020-10-12 19:55:53,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:55:53,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:55:53,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:55:53,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:55:53,271 INFO L87 Difference]: Start difference. First operand 9731 states and 13620 transitions. Second operand 12 states. [2020-10-12 19:56:09,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:09,144 INFO L93 Difference]: Finished difference Result 126279 states and 175584 transitions. [2020-10-12 19:56:09,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-12 19:56:09,145 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-10-12 19:56:09,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:09,483 INFO L225 Difference]: With dead ends: 126279 [2020-10-12 19:56:09,483 INFO L226 Difference]: Without dead ends: 116595 [2020-10-12 19:56:09,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1558 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=842, Invalid=3580, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 19:56:09,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116595 states. [2020-10-12 19:56:19,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116595 to 75269. [2020-10-12 19:56:19,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75269 states. [2020-10-12 19:56:19,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75269 states to 75269 states and 106138 transitions. [2020-10-12 19:56:19,823 INFO L78 Accepts]: Start accepts. Automaton has 75269 states and 106138 transitions. Word has length 65 [2020-10-12 19:56:19,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:19,824 INFO L479 AbstractCegarLoop]: Abstraction has 75269 states and 106138 transitions. [2020-10-12 19:56:19,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:56:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand 75269 states and 106138 transitions. [2020-10-12 19:56:19,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:56:19,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:19,831 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:19,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:56:19,831 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:19,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:19,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1716358203, now seen corresponding path program 1 times [2020-10-12 19:56:19,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:19,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008312932] [2020-10-12 19:56:19,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:19,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:19,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:19,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:19,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:20,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:20,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:56:20,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:56:20,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 996 [2020-10-12 19:56:20,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:20,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:56:20,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:56:20,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 19:56:20,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:21,031 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 25 [2020-10-12 19:56:21,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:21,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:21,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:21,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:21,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:21,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:21,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:56:21,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:21,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:56:21,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:21,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:56:21,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:21,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008312932] [2020-10-12 19:56:21,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:56:21,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:56:21,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389145196] [2020-10-12 19:56:21,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:56:21,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:21,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:56:21,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:56:21,164 INFO L87 Difference]: Start difference. First operand 75269 states and 106138 transitions. Second operand 10 states. [2020-10-12 19:56:39,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:56:39,777 INFO L93 Difference]: Finished difference Result 181150 states and 254593 transitions. [2020-10-12 19:56:39,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:56:39,778 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 65 [2020-10-12 19:56:39,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:56:40,053 INFO L225 Difference]: With dead ends: 181150 [2020-10-12 19:56:40,053 INFO L226 Difference]: Without dead ends: 142498 [2020-10-12 19:56:40,138 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2020-10-12 19:56:40,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142498 states. [2020-10-12 19:56:52,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142498 to 92277. [2020-10-12 19:56:52,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92277 states. [2020-10-12 19:56:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92277 states to 92277 states and 129869 transitions. [2020-10-12 19:56:53,153 INFO L78 Accepts]: Start accepts. Automaton has 92277 states and 129869 transitions. Word has length 65 [2020-10-12 19:56:53,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:56:53,153 INFO L479 AbstractCegarLoop]: Abstraction has 92277 states and 129869 transitions. [2020-10-12 19:56:53,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:56:53,153 INFO L276 IsEmpty]: Start isEmpty. Operand 92277 states and 129869 transitions. [2020-10-12 19:56:53,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:56:53,160 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:56:53,160 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:56:53,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:56:53,161 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:56:53,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:56:53,161 INFO L82 PathProgramCache]: Analyzing trace with hash 742110884, now seen corresponding path program 1 times [2020-10-12 19:56:53,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:56:53,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416348373] [2020-10-12 19:56:53,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:56:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:53,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:53,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:53,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:53,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:53,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:53,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:54,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:54,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:54,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:58,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:58,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:56:58,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:56:58,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5779 [2020-10-12 19:56:58,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:58,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:56:58,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:56:58,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:56:58,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:59,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:56:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:56:59,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:56:59,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:56:59,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:56:59,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:56:59,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:56:59,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:56:59,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:56:59,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:56:59,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:56:59,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:56:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:56:59,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416348373] [2020-10-12 19:56:59,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:56:59,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 19:56:59,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312142018] [2020-10-12 19:56:59,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:56:59,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:56:59,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:56:59,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:56:59,276 INFO L87 Difference]: Start difference. First operand 92277 states and 129869 transitions. Second operand 12 states.