/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=SHALLOWEST --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 language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:33:59,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:33:59,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:33:59,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:33:59,728 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:33:59,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:33:59,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:33:59,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:33:59,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:33:59,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:33:59,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:33:59,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:33:59,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:33:59,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:33:59,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:33:59,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:33:59,766 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:33:59,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:33:59,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:33:59,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:33:59,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:33:59,791 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:33:59,792 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:33:59,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:33:59,804 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:33:59,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:33:59,805 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:33:59,807 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:33:59,808 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:33:59,809 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:33:59,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:33:59,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:33:59,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:33:59,813 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:33:59,814 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:33:59,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:33:59,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:33:59,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:33:59,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:33:59,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:33:59,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:33:59,834 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 [2020-10-27 05:33:59,864 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:33:59,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:33:59,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:33:59,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:33:59,867 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:33:59,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:33:59,867 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:33:59,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:33:59,868 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:33:59,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:33:59,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:33:59,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:33:59,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:33:59,869 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:33:59,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:33:59,869 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:33:59,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:33:59,870 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:33:59,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:33:59,870 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:33:59,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:33:59,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:33:59,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:33:59,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:33:59,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:33:59,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:33:59,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:33:59,872 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:33:59,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:33:59,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:34:00,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:34:00,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:34:00,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:34:00,281 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:34:00,282 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:34:00,282 INFO L432 ainManager$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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 05:34:00,360 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9929541d0/aa33c6f1057044a29b37de04d79827dc/FLAG6e8c416e5 [2020-10-27 05:34:01,281 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:34:01,282 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 05:34:01,312 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9929541d0/aa33c6f1057044a29b37de04d79827dc/FLAG6e8c416e5 [2020-10-27 05:34:01,453 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9929541d0/aa33c6f1057044a29b37de04d79827dc [2020-10-27 05:34:01,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:34:01,463 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:34:01,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:34:01,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:34:01,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:34:01,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:34:01" (1/1) ... [2020-10-27 05:34:01,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e944a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:34:01, skipping insertion in model container [2020-10-27 05:34:01,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:34:01" (1/1) ... [2020-10-27 05:34:01,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:34:01,562 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:34:02,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:34:02,199 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:34:02,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:34:02,565 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:34:02,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:34:02 WrapperNode [2020-10-27 05:34:02,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:34:02,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:34:02,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:34:02,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:34:02,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:34:02" (1/1) ... [2020-10-27 05:34:02,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:34:02" (1/1) ... [2020-10-27 05:34:02,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:34:02" (1/1) ... [2020-10-27 05:34:02,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:34:02" (1/1) ... [2020-10-27 05:34:02,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:34:02" (1/1) ... [2020-10-27 05:34:02,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:34:02" (1/1) ... [2020-10-27 05:34:02,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:34:02" (1/1) ... [2020-10-27 05:34:02,792 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:34:02,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:34:02,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:34:02,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:34:02,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:34:02" (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 [2020-10-27 05:34:02,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:34:02,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:34:02,883 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:34:02,884 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:34:02,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:34:02,885 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:34:02,885 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:34:02,885 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:34:02,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:34:02,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:34:02,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:34:02,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:34:02,887 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:34:02,887 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:34:02,887 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:34:02,888 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:34:02,889 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:34:02,889 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:34:02,889 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:34:02,889 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:34:02,889 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:34:02,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:34:02,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:34:02,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:34:02,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:34:02,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:34:02,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:34:02,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:34:05,202 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:34:05,202 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:34:05,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:34:05 BoogieIcfgContainer [2020-10-27 05:34:05,205 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:34:05,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:34:05,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:34:05,211 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:34:05,212 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:34:01" (1/3) ... [2020-10-27 05:34:05,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f4ca072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:34:05, skipping insertion in model container [2020-10-27 05:34:05,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:34:02" (2/3) ... [2020-10-27 05:34:05,213 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f4ca072 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:34:05, skipping insertion in model container [2020-10-27 05:34:05,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:34:05" (3/3) ... [2020-10-27 05:34:05,215 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-10-27 05:34:05,228 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:34:05,234 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:34:05,249 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:34:05,283 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:34:05,284 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:34:05,284 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:34:05,284 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:34:05,284 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:34:05,284 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:34:05,284 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:34:05,285 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:34:05,315 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states. [2020-10-27 05:34:05,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:34:05,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:05,337 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:05,337 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:05,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:05,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1101731786, now seen corresponding path program 1 times [2020-10-27 05:34:05,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:05,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384792156] [2020-10-27 05:34:05,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:05,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:06,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:06,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:06,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:06,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:07,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:08,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:10,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:10,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:10,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:10,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:10,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:34:10,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:34:10,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 05:34:10,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:10,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:34:10,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:10,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:34:10,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 05:34:11,808 WARN L193 SmtUtils]: Spent 718.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:34:11,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:11,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:11,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:11,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:11,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:11,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 05:34:11,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:11,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:11,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:11,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:11,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:11,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:11,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384792156] [2020-10-27 05:34:11,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:11,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:34:11,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282526676] [2020-10-27 05:34:11,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:34:11,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:11,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:34:11,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:34:11,993 INFO L87 Difference]: Start difference. First operand 465 states. Second operand 8 states. [2020-10-27 05:34:12,799 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-27 05:34:17,508 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:34:19,071 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:34:19,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:19,328 INFO L93 Difference]: Finished difference Result 851 states and 1458 transitions. [2020-10-27 05:34:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:34:19,330 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-10-27 05:34:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:19,379 INFO L225 Difference]: With dead ends: 851 [2020-10-27 05:34:19,379 INFO L226 Difference]: Without dead ends: 705 [2020-10-27 05:34:19,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:34:19,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2020-10-27 05:34:19,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 462. [2020-10-27 05:34:19,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-10-27 05:34:19,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 604 transitions. [2020-10-27 05:34:19,487 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 604 transitions. Word has length 55 [2020-10-27 05:34:19,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:19,488 INFO L481 AbstractCegarLoop]: Abstraction has 462 states and 604 transitions. [2020-10-27 05:34:19,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:34:19,489 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 604 transitions. [2020-10-27 05:34:19,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 05:34:19,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:19,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:19,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:34:19,494 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:19,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:19,494 INFO L82 PathProgramCache]: Analyzing trace with hash -2092309806, now seen corresponding path program 1 times [2020-10-27 05:34:19,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:19,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991205904] [2020-10-27 05:34:19,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:19,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:19,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:19,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:19,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:20,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:20,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:20,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:20,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:21,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:21,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:22,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:22,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:23,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:24,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:24,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:24,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 05:34:24,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 05:34:24,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:34:24,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:24,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:34:24,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:24,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:34:24,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:25,458 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:34:25,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:25,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:25,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:25,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:25,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:25,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-27 05:34:25,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:25,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:25,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:25,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:25,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:34:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:25,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991205904] [2020-10-27 05:34:25,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:25,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:34:25,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500241697] [2020-10-27 05:34:25,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:34:25,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:25,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:34:25,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:34:25,648 INFO L87 Difference]: Start difference. First operand 462 states and 604 transitions. Second operand 10 states. [2020-10-27 05:34:26,445 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-27 05:34:31,055 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 308 DAG size of output: 307 [2020-10-27 05:34:31,947 WARN L193 SmtUtils]: Spent 711.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-10-27 05:34:32,741 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-27 05:34:35,276 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification that was a NOOP. DAG size: 305 [2020-10-27 05:34:36,030 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2020-10-27 05:34:36,793 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:34:37,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:37,435 INFO L93 Difference]: Finished difference Result 2291 states and 3324 transitions. [2020-10-27 05:34:37,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 05:34:37,435 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 05:34:37,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:37,449 INFO L225 Difference]: With dead ends: 2291 [2020-10-27 05:34:37,450 INFO L226 Difference]: Without dead ends: 1946 [2020-10-27 05:34:37,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=407, Invalid=1573, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 05:34:37,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2020-10-27 05:34:37,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 942. [2020-10-27 05:34:37,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 942 states. [2020-10-27 05:34:37,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1342 transitions. [2020-10-27 05:34:37,595 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1342 transitions. Word has length 55 [2020-10-27 05:34:37,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:37,595 INFO L481 AbstractCegarLoop]: Abstraction has 942 states and 1342 transitions. [2020-10-27 05:34:37,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:34:37,595 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1342 transitions. [2020-10-27 05:34:37,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:34:37,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:37,598 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:37,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:34:37,599 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:37,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:37,599 INFO L82 PathProgramCache]: Analyzing trace with hash 425180388, now seen corresponding path program 1 times [2020-10-27 05:34:37,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:37,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723554439] [2020-10-27 05:34:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:37,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:37,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:37,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:37,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:38,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:39,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:39,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:40,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:40,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:40,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:41,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:41,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:41,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:42,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:42,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:42,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:42,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:42,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:34:42,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 05:34:42,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 05:34:42,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:42,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:34:42,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:42,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:34:42,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:43,487 WARN L193 SmtUtils]: Spent 646.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:34:43,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:43,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:43,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:43,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:43,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:43,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-27 05:34:43,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:43,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:43,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:43,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:43,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:43,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723554439] [2020-10-27 05:34:43,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:43,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:34:43,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424003164] [2020-10-27 05:34:43,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:34:43,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:43,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:34:43,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:34:43,641 INFO L87 Difference]: Start difference. First operand 942 states and 1342 transitions. Second operand 11 states. [2020-10-27 05:34:44,418 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:34:47,536 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-27 05:34:48,368 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-27 05:34:50,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:50,929 INFO L93 Difference]: Finished difference Result 3925 states and 5934 transitions. [2020-10-27 05:34:50,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 05:34:50,931 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 05:34:50,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:50,949 INFO L225 Difference]: With dead ends: 3925 [2020-10-27 05:34:50,949 INFO L226 Difference]: Without dead ends: 3220 [2020-10-27 05:34:50,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2020-10-27 05:34:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2020-10-27 05:34:51,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 1382. [2020-10-27 05:34:51,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1382 states. [2020-10-27 05:34:51,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1382 states to 1382 states and 2018 transitions. [2020-10-27 05:34:51,086 INFO L78 Accepts]: Start accepts. Automaton has 1382 states and 2018 transitions. Word has length 56 [2020-10-27 05:34:51,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:51,087 INFO L481 AbstractCegarLoop]: Abstraction has 1382 states and 2018 transitions. [2020-10-27 05:34:51,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:34:51,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1382 states and 2018 transitions. [2020-10-27 05:34:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:34:51,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:51,089 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:34:51,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:34:51,089 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:51,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:51,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2109039567, now seen corresponding path program 1 times [2020-10-27 05:34:51,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:51,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1811568435] [2020-10-27 05:34:51,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:51,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:51,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:51,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:51,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:51,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:51,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:51,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:52,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:52,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:54,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:54,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:56,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:56,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:34:56,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:34:56,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 05:34:56,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:56,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:34:56,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:56,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 05:34:56,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:56,870 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:34:56,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:56,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:56,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:56,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:56,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:56,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-27 05:34:56,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:56,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:56,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:56,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:56,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:56,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1811568435] [2020-10-27 05:34:56,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:56,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:34:56,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669466109] [2020-10-27 05:34:56,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:34:56,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:56,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:34:56,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:34:56,966 INFO L87 Difference]: Start difference. First operand 1382 states and 2018 transitions. Second operand 8 states. [2020-10-27 05:34:57,825 WARN L193 SmtUtils]: Spent 795.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-27 05:35:00,420 WARN L193 SmtUtils]: Spent 704.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:35:02,252 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:35:02,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:02,675 INFO L93 Difference]: Finished difference Result 5043 states and 7591 transitions. [2020-10-27 05:35:02,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 05:35:02,675 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-27 05:35:02,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:02,696 INFO L225 Difference]: With dead ends: 5043 [2020-10-27 05:35:02,697 INFO L226 Difference]: Without dead ends: 4143 [2020-10-27 05:35:02,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-27 05:35:02,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2020-10-27 05:35:02,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 737. [2020-10-27 05:35:02,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 737 states. [2020-10-27 05:35:02,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1013 transitions. [2020-10-27 05:35:02,814 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 1013 transitions. Word has length 56 [2020-10-27 05:35:02,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:02,814 INFO L481 AbstractCegarLoop]: Abstraction has 737 states and 1013 transitions. [2020-10-27 05:35:02,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:35:02,815 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 1013 transitions. [2020-10-27 05:35:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 05:35:02,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:02,818 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:35:02,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:35:02,818 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:02,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:02,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1197385068, now seen corresponding path program 1 times [2020-10-27 05:35:02,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:02,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391362146] [2020-10-27 05:35:02,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:02,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:02,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:02,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:02,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:03,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:03,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:03,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:03,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:04,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:04,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:07,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:07,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 05:35:07,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:35:07,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-27 05:35:07,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:07,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:35:07,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:35:07,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 05:35:07,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:08,594 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:35:08,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:08,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:08,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:08,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:08,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:08,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 05:35:08,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:08,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:35:08,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:08,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:35:08,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:08,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391362146] [2020-10-27 05:35:08,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:08,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 05:35:08,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572826778] [2020-10-27 05:35:08,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:35:08,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:08,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:35:08,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:35:08,684 INFO L87 Difference]: Start difference. First operand 737 states and 1013 transitions. Second operand 8 states. [2020-10-27 05:35:09,388 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-27 05:35:11,952 WARN L193 SmtUtils]: Spent 672.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-10-27 05:35:13,797 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 300 [2020-10-27 05:35:14,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:14,164 INFO L93 Difference]: Finished difference Result 2009 states and 2907 transitions. [2020-10-27 05:35:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:35:14,164 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2020-10-27 05:35:14,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:14,173 INFO L225 Difference]: With dead ends: 2009 [2020-10-27 05:35:14,173 INFO L226 Difference]: Without dead ends: 1771 [2020-10-27 05:35:14,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-10-27 05:35:14,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2020-10-27 05:35:14,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 767. [2020-10-27 05:35:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2020-10-27 05:35:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1056 transitions. [2020-10-27 05:35:14,262 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1056 transitions. Word has length 56 [2020-10-27 05:35:14,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:14,263 INFO L481 AbstractCegarLoop]: Abstraction has 767 states and 1056 transitions. [2020-10-27 05:35:14,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:35:14,263 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1056 transitions. [2020-10-27 05:35:14,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:35:14,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:14,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:35:14,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:35:14,265 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:14,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:14,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1876536965, now seen corresponding path program 1 times [2020-10-27 05:35:14,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:14,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162311261] [2020-10-27 05:35:14,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:14,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:14,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:14,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:14,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:14,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:15,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:15,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:16,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:16,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:16,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:16,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:17,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:18,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:18,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:19,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:19,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:35:19,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:35:19,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 05:35:19,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:19,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:35:19,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:35:19,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:35:19,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:20,102 WARN L193 SmtUtils]: Spent 603.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:35:20,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:20,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:20,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:20,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:20,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:20,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 05:35:20,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:20,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:35:20,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:20,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:35:20,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:20,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:20,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162311261] [2020-10-27 05:35:20,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:20,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:35:20,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150311068] [2020-10-27 05:35:20,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:35:20,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:20,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:35:20,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:35:20,191 INFO L87 Difference]: Start difference. First operand 767 states and 1056 transitions. Second operand 11 states. [2020-10-27 05:35:20,955 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:35:24,124 WARN L193 SmtUtils]: Spent 708.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:35:24,923 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-27 05:35:27,065 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-27 05:35:27,872 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-10-27 05:35:28,701 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:35:29,455 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:35:30,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:30,367 INFO L93 Difference]: Finished difference Result 2935 states and 4290 transitions. [2020-10-27 05:35:30,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:35:30,367 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 05:35:30,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:30,377 INFO L225 Difference]: With dead ends: 2935 [2020-10-27 05:35:30,377 INFO L226 Difference]: Without dead ends: 2420 [2020-10-27 05:35:30,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2020-10-27 05:35:30,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2420 states. [2020-10-27 05:35:30,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2420 to 1001. [2020-10-27 05:35:30,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2020-10-27 05:35:30,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1403 transitions. [2020-10-27 05:35:30,523 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1403 transitions. Word has length 57 [2020-10-27 05:35:30,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:30,524 INFO L481 AbstractCegarLoop]: Abstraction has 1001 states and 1403 transitions. [2020-10-27 05:35:30,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:35:30,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1403 transitions. [2020-10-27 05:35:30,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 05:35:30,526 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:30,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:35:30,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:35:30,526 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:30,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:30,527 INFO L82 PathProgramCache]: Analyzing trace with hash -939490235, now seen corresponding path program 1 times [2020-10-27 05:35:30,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:30,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911999176] [2020-10-27 05:35:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:30,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:30,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:30,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:30,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:30,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:31,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:31,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:31,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:32,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:32,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:35,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:35,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 05:35:35,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:35:35,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 05:35:35,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:35,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:35:35,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:35:35,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 05:35:35,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:36,426 WARN L193 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:35:36,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:36,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:36,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:36,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:36,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:36,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-27 05:35:36,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:36,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:35:36,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:36,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:35:36,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:36,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911999176] [2020-10-27 05:35:36,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:36,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 05:35:36,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469409537] [2020-10-27 05:35:36,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:35:36,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:36,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:35:36,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:35:36,574 INFO L87 Difference]: Start difference. First operand 1001 states and 1403 transitions. Second operand 11 states. [2020-10-27 05:35:37,351 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:35:40,671 WARN L193 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 322 [2020-10-27 05:35:41,647 WARN L193 SmtUtils]: Spent 702.00 ms on a formula simplification that was a NOOP. DAG size: 316 [2020-10-27 05:35:44,704 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-27 05:35:45,458 WARN L193 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-27 05:35:46,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:46,951 INFO L93 Difference]: Finished difference Result 7309 states and 10492 transitions. [2020-10-27 05:35:46,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 05:35:46,952 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 57 [2020-10-27 05:35:46,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:46,974 INFO L225 Difference]: With dead ends: 7309 [2020-10-27 05:35:46,974 INFO L226 Difference]: Without dead ends: 6505 [2020-10-27 05:35:46,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=556, Invalid=2096, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 05:35:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6505 states. [2020-10-27 05:35:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6505 to 1599. [2020-10-27 05:35:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1599 states. [2020-10-27 05:35:47,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1599 states to 1599 states and 2291 transitions. [2020-10-27 05:35:47,379 INFO L78 Accepts]: Start accepts. Automaton has 1599 states and 2291 transitions. Word has length 57 [2020-10-27 05:35:47,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:47,380 INFO L481 AbstractCegarLoop]: Abstraction has 1599 states and 2291 transitions. [2020-10-27 05:35:47,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:35:47,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1599 states and 2291 transitions. [2020-10-27 05:35:47,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:35:47,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:47,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:35:47,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:35:47,382 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:47,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:47,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1783028029, now seen corresponding path program 1 times [2020-10-27 05:35:47,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:47,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964270233] [2020-10-27 05:35:47,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:47,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:47,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:47,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:47,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:47,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:48,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:49,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:49,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:49,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:49,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:50,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:51,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:51,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:52,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:52,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:52,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:52,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:35:52,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 05:35:52,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 05:35:52,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:52,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 05:35:52,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:35:52,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:35:52,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:53,449 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:35:53,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:53,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:53,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:53,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:53,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:53,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:35:53,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:53,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:35:53,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:53,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:35:53,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:53,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964270233] [2020-10-27 05:35:53,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:35:53,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-27 05:35:53,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216514621] [2020-10-27 05:35:53,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 05:35:53,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:53,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 05:35:53,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-27 05:35:53,535 INFO L87 Difference]: Start difference. First operand 1599 states and 2291 transitions. Second operand 15 states. [2020-10-27 05:35:55,182 WARN L193 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 313 DAG size of output: 311 [2020-10-27 05:35:58,859 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-27 05:35:59,815 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 304 [2020-10-27 05:36:00,517 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification that was a NOOP. DAG size: 296 [2020-10-27 05:36:01,478 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 305 [2020-10-27 05:36:02,456 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-27 05:36:05,000 WARN L193 SmtUtils]: Spent 698.00 ms on a formula simplification that was a NOOP. DAG size: 306 [2020-10-27 05:36:06,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:06,543 INFO L93 Difference]: Finished difference Result 6864 states and 10226 transitions. [2020-10-27 05:36:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 05:36:06,543 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 58 [2020-10-27 05:36:06,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:06,567 INFO L225 Difference]: With dead ends: 6864 [2020-10-27 05:36:06,567 INFO L226 Difference]: Without dead ends: 5994 [2020-10-27 05:36:06,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=246, Invalid=944, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 05:36:06,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5994 states. [2020-10-27 05:36:07,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5994 to 3217. [2020-10-27 05:36:07,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3217 states. [2020-10-27 05:36:07,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3217 states to 3217 states and 4742 transitions. [2020-10-27 05:36:07,171 INFO L78 Accepts]: Start accepts. Automaton has 3217 states and 4742 transitions. Word has length 58 [2020-10-27 05:36:07,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:07,171 INFO L481 AbstractCegarLoop]: Abstraction has 3217 states and 4742 transitions. [2020-10-27 05:36:07,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 05:36:07,172 INFO L276 IsEmpty]: Start isEmpty. Operand 3217 states and 4742 transitions. [2020-10-27 05:36:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:36:07,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:07,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:36:07,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:36:07,175 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:07,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:07,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1264082807, now seen corresponding path program 1 times [2020-10-27 05:36:07,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:07,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [42205825] [2020-10-27 05:36:07,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:07,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:07,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:07,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:07,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:08,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:11,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:11,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:36:11,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:36:11,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3942 [2020-10-27 05:36:11,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:11,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:36:11,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:36:11,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 05:36:11,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:11,902 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:36:11,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:11,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:11,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:11,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:11,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:11,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:36:11,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:11,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:36:11,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:11,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:36:11,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:36:11,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [42205825] [2020-10-27 05:36:11,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:11,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:36:11,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809973913] [2020-10-27 05:36:11,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:36:11,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:11,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:36:11,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:36:11,971 INFO L87 Difference]: Start difference. First operand 3217 states and 4742 transitions. Second operand 9 states. [2020-10-27 05:36:12,681 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:36:15,154 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:36:17,258 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:36:18,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:18,212 INFO L93 Difference]: Finished difference Result 9966 states and 14932 transitions. [2020-10-27 05:36:18,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 05:36:18,212 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-27 05:36:18,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:18,230 INFO L225 Difference]: With dead ends: 9966 [2020-10-27 05:36:18,230 INFO L226 Difference]: Without dead ends: 7449 [2020-10-27 05:36:18,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:36:18,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7449 states. [2020-10-27 05:36:18,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7449 to 3154. [2020-10-27 05:36:18,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3154 states. [2020-10-27 05:36:18,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3154 states to 3154 states and 4652 transitions. [2020-10-27 05:36:18,888 INFO L78 Accepts]: Start accepts. Automaton has 3154 states and 4652 transitions. Word has length 58 [2020-10-27 05:36:18,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:18,889 INFO L481 AbstractCegarLoop]: Abstraction has 3154 states and 4652 transitions. [2020-10-27 05:36:18,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:36:18,889 INFO L276 IsEmpty]: Start isEmpty. Operand 3154 states and 4652 transitions. [2020-10-27 05:36:18,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:36:18,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:18,892 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:36:18,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:36:18,892 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:18,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:18,893 INFO L82 PathProgramCache]: Analyzing trace with hash 63653439, now seen corresponding path program 1 times [2020-10-27 05:36:18,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:18,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671979135] [2020-10-27 05:36:18,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:18,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:18,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:19,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:19,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:19,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:22,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:22,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:36:22,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:36:22,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3798 [2020-10-27 05:36:22,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:22,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 05:36:22,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:36:22,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:36:22,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:23,548 WARN L193 SmtUtils]: Spent 683.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:36:23,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:23,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:23,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:23,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:23,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:23,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 05:36:23,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:23,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:36:23,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:23,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:36:23,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:36:23,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671979135] [2020-10-27 05:36:23,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:23,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:36:23,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400571130] [2020-10-27 05:36:23,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 05:36:23,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:23,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 05:36:23,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:36:23,596 INFO L87 Difference]: Start difference. First operand 3154 states and 4652 transitions. Second operand 9 states. [2020-10-27 05:36:24,277 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:36:26,548 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:36:28,418 WARN L193 SmtUtils]: Spent 678.00 ms on a formula simplification that was a NOOP. DAG size: 302 [2020-10-27 05:36:30,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:30,510 INFO L93 Difference]: Finished difference Result 12379 states and 18706 transitions. [2020-10-27 05:36:30,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 05:36:30,511 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 58 [2020-10-27 05:36:30,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:30,533 INFO L225 Difference]: With dead ends: 12379 [2020-10-27 05:36:30,533 INFO L226 Difference]: Without dead ends: 10017 [2020-10-27 05:36:30,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-27 05:36:30,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10017 states. [2020-10-27 05:36:31,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10017 to 3131. [2020-10-27 05:36:31,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3131 states. [2020-10-27 05:36:31,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 4616 transitions. [2020-10-27 05:36:31,214 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 4616 transitions. Word has length 58 [2020-10-27 05:36:31,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:31,214 INFO L481 AbstractCegarLoop]: Abstraction has 3131 states and 4616 transitions. [2020-10-27 05:36:31,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 05:36:31,215 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 4616 transitions. [2020-10-27 05:36:31,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 05:36:31,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:31,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:36:31,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:36:31,217 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:31,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:31,218 INFO L82 PathProgramCache]: Analyzing trace with hash 546913119, now seen corresponding path program 1 times [2020-10-27 05:36:31,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:31,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827534088] [2020-10-27 05:36:31,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:31,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:31,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:31,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:31,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:31,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:34,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:34,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 05:36:34,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:36:34,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2952 [2020-10-27 05:36:34,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:34,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:36:34,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:36:34,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 05:36:34,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:34,921 WARN L193 SmtUtils]: Spent 613.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:36:34,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:34,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:34,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:34,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:34,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:34,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 05:36:34,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:34,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:36:34,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:34,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:36:34,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:36:34,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827534088] [2020-10-27 05:36:34,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:34,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 05:36:34,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681277470] [2020-10-27 05:36:34,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:36:34,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:34,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:36:34,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:36:34,978 INFO L87 Difference]: Start difference. First operand 3131 states and 4616 transitions. Second operand 8 states. [2020-10-27 05:36:35,837 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:36:39,417 WARN L193 SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:36:40,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:40,422 INFO L93 Difference]: Finished difference Result 9336 states and 13994 transitions. [2020-10-27 05:36:40,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 05:36:40,422 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 58 [2020-10-27 05:36:40,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:40,438 INFO L225 Difference]: With dead ends: 9336 [2020-10-27 05:36:40,438 INFO L226 Difference]: Without dead ends: 6806 [2020-10-27 05:36:40,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-27 05:36:40,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6806 states. [2020-10-27 05:36:41,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6806 to 3030. [2020-10-27 05:36:41,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3030 states. [2020-10-27 05:36:41,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3030 states to 3030 states and 4479 transitions. [2020-10-27 05:36:41,192 INFO L78 Accepts]: Start accepts. Automaton has 3030 states and 4479 transitions. Word has length 58 [2020-10-27 05:36:41,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:41,192 INFO L481 AbstractCegarLoop]: Abstraction has 3030 states and 4479 transitions. [2020-10-27 05:36:41,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 05:36:41,193 INFO L276 IsEmpty]: Start isEmpty. Operand 3030 states and 4479 transitions. [2020-10-27 05:36:41,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 05:36:41,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:41,197 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:36:41,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:36:41,197 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:41,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:41,198 INFO L82 PathProgramCache]: Analyzing trace with hash 770321802, now seen corresponding path program 1 times [2020-10-27 05:36:41,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:41,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718047904] [2020-10-27 05:36:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:41,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:41,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:41,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:41,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:41,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:41,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:41,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:42,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:42,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:46,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:46,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 05:36:46,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 05:36:46,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 05:36:46,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:46,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:36:46,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:36:46,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 05:36:46,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:46,987 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:36:46,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:47,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:47,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:47,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:47,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:47,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:36:47,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:47,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:36:47,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:47,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:36:47,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:36:47,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718047904] [2020-10-27 05:36:47,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:47,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:36:47,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483689774] [2020-10-27 05:36:47,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:36:47,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:47,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:36:47,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:36:47,049 INFO L87 Difference]: Start difference. First operand 3030 states and 4479 transitions. Second operand 6 states. [2020-10-27 05:36:47,751 WARN L193 SmtUtils]: Spent 655.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:36:50,471 WARN L193 SmtUtils]: Spent 650.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:36:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:51,134 INFO L93 Difference]: Finished difference Result 7145 states and 10770 transitions. [2020-10-27 05:36:51,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:36:51,135 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-27 05:36:51,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:51,150 INFO L225 Difference]: With dead ends: 7145 [2020-10-27 05:36:51,151 INFO L226 Difference]: Without dead ends: 4856 [2020-10-27 05:36:51,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:36:51,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4856 states. [2020-10-27 05:36:52,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4856 to 4542. [2020-10-27 05:36:52,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4542 states. [2020-10-27 05:36:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 6748 transitions. [2020-10-27 05:36:52,241 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 6748 transitions. Word has length 70 [2020-10-27 05:36:52,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:36:52,241 INFO L481 AbstractCegarLoop]: Abstraction has 4542 states and 6748 transitions. [2020-10-27 05:36:52,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:36:52,241 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 6748 transitions. [2020-10-27 05:36:52,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:36:52,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:36:52,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:36:52,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:36:52,247 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:36:52,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:36:52,248 INFO L82 PathProgramCache]: Analyzing trace with hash 656112154, now seen corresponding path program 1 times [2020-10-27 05:36:52,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:36:52,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822097453] [2020-10-27 05:36:52,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:36:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:52,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:52,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:52,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:52,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:52,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:53,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:55,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:55,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:55,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:55,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:55,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:55,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:56,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:57,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:57,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:36:57,277 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 05:36:57,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:36:57,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:57,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:36:57,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:36:57,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 05:36:57,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:58,068 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:36:58,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:36:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:36:58,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:36:58,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:36:58,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:36:58,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:36:58,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 05:36:58,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:36:58,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:36:58,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:36:58,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:36:58,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:36:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:36:58,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822097453] [2020-10-27 05:36:58,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:36:58,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:36:58,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033128865] [2020-10-27 05:36:58,145 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:36:58,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:36:58,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:36:58,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:36:58,146 INFO L87 Difference]: Start difference. First operand 4542 states and 6748 transitions. Second operand 6 states. [2020-10-27 05:36:58,906 WARN L193 SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:37:01,199 WARN L193 SmtUtils]: Spent 665.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:37:01,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:01,640 INFO L93 Difference]: Finished difference Result 7688 states and 11579 transitions. [2020-10-27 05:37:01,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:37:01,641 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:37:01,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:01,645 INFO L225 Difference]: With dead ends: 7688 [2020-10-27 05:37:01,645 INFO L226 Difference]: Without dead ends: 3620 [2020-10-27 05:37:01,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:37:01,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2020-10-27 05:37:02,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 3616. [2020-10-27 05:37:02,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3616 states. [2020-10-27 05:37:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 5421 transitions. [2020-10-27 05:37:02,330 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 5421 transitions. Word has length 71 [2020-10-27 05:37:02,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:02,330 INFO L481 AbstractCegarLoop]: Abstraction has 3616 states and 5421 transitions. [2020-10-27 05:37:02,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:37:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 5421 transitions. [2020-10-27 05:37:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:37:02,335 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:02,335 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:37:02,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:37:02,336 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:02,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:02,336 INFO L82 PathProgramCache]: Analyzing trace with hash 2067309488, now seen corresponding path program 1 times [2020-10-27 05:37:02,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:02,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174721711] [2020-10-27 05:37:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:02,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:02,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:02,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:02,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:02,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:02,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:03,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:06,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:06,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:37:06,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:37:06,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4415 [2020-10-27 05:37:06,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:06,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:37:06,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:37:06,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 05:37:06,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:07,519 WARN L193 SmtUtils]: Spent 635.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:37:07,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:07,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:07,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:07,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:07,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:07,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:37:07,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:07,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:37:07,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:07,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:37:07,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:37:07,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174721711] [2020-10-27 05:37:07,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:07,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:37:07,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957094774] [2020-10-27 05:37:07,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:37:07,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:07,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:37:07,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:37:07,569 INFO L87 Difference]: Start difference. First operand 3616 states and 5421 transitions. Second operand 6 states. [2020-10-27 05:37:10,431 WARN L193 SmtUtils]: Spent 666.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:37:11,126 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:37:11,911 WARN L193 SmtUtils]: Spent 676.00 ms on a formula simplification that was a NOOP. DAG size: 303 [2020-10-27 05:37:13,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:13,292 INFO L93 Difference]: Finished difference Result 12110 states and 18432 transitions. [2020-10-27 05:37:13,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:37:13,292 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:37:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:13,303 INFO L225 Difference]: With dead ends: 12110 [2020-10-27 05:37:13,303 INFO L226 Difference]: Without dead ends: 8617 [2020-10-27 05:37:13,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:37:13,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8617 states. [2020-10-27 05:37:14,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8617 to 4714. [2020-10-27 05:37:14,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4714 states. [2020-10-27 05:37:14,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4714 states to 4714 states and 7069 transitions. [2020-10-27 05:37:14,480 INFO L78 Accepts]: Start accepts. Automaton has 4714 states and 7069 transitions. Word has length 71 [2020-10-27 05:37:14,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:14,480 INFO L481 AbstractCegarLoop]: Abstraction has 4714 states and 7069 transitions. [2020-10-27 05:37:14,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:37:14,480 INFO L276 IsEmpty]: Start isEmpty. Operand 4714 states and 7069 transitions. [2020-10-27 05:37:14,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 05:37:14,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:14,485 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:37:14,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:37:14,485 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:14,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1340367735, now seen corresponding path program 1 times [2020-10-27 05:37:14,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:14,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000798534] [2020-10-27 05:37:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:14,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:14,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:14,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:14,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:14,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:14,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:17,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:17,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 05:37:17,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 05:37:17,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2769 [2020-10-27 05:37:17,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:17,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:37:17,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:17,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 05:37:17,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:18,016 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:37:18,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:18,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:18,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:18,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:18,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:18,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:37:18,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:18,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:18,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:18,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:18,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:37:18,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000798534] [2020-10-27 05:37:18,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:18,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:37:18,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70243627] [2020-10-27 05:37:18,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:37:18,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:18,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:37:18,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:37:18,084 INFO L87 Difference]: Start difference. First operand 4714 states and 7069 transitions. Second operand 6 states. [2020-10-27 05:37:18,903 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification that was a NOOP. DAG size: 298 [2020-10-27 05:37:21,300 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification that was a NOOP. DAG size: 297 [2020-10-27 05:37:22,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:22,050 INFO L93 Difference]: Finished difference Result 8150 states and 12211 transitions. [2020-10-27 05:37:22,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:37:22,050 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-27 05:37:22,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:22,057 INFO L225 Difference]: With dead ends: 8150 [2020-10-27 05:37:22,057 INFO L226 Difference]: Without dead ends: 5410 [2020-10-27 05:37:22,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:37:22,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5410 states. [2020-10-27 05:37:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5410 to 5407. [2020-10-27 05:37:23,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5407 states. [2020-10-27 05:37:23,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5407 states to 5407 states and 8075 transitions. [2020-10-27 05:37:23,326 INFO L78 Accepts]: Start accepts. Automaton has 5407 states and 8075 transitions. Word has length 71 [2020-10-27 05:37:23,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:23,327 INFO L481 AbstractCegarLoop]: Abstraction has 5407 states and 8075 transitions. [2020-10-27 05:37:23,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:37:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 5407 states and 8075 transitions. [2020-10-27 05:37:23,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:37:23,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:23,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:37:23,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 05:37:23,335 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:23,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:23,336 INFO L82 PathProgramCache]: Analyzing trace with hash 357936173, now seen corresponding path program 1 times [2020-10-27 05:37:23,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:23,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947673059] [2020-10-27 05:37:23,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:23,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:23,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:23,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:23,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:23,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:23,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:25,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:27,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:27,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:27,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:28,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:28,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 05:37:28,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 05:37:28,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 05:37:28,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:28,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:37:28,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:28,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 05:37:28,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:29,126 WARN L193 SmtUtils]: Spent 634.00 ms on a formula simplification that was a NOOP. DAG size: 292 [2020-10-27 05:37:29,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:29,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:29,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:29,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:29,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:29,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 05:37:29,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:29,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:29,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:29,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:29,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:29,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:37:29,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947673059] [2020-10-27 05:37:29,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:37:29,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 05:37:29,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103889246] [2020-10-27 05:37:29,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:37:29,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:29,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:37:29,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:37:29,185 INFO L87 Difference]: Start difference. First operand 5407 states and 8075 transitions. Second operand 10 states. [2020-10-27 05:37:30,033 WARN L193 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 305 [2020-10-27 05:37:33,728 WARN L193 SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 301 [2020-10-27 05:37:34,636 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 299 [2020-10-27 05:37:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:37:35,793 INFO L93 Difference]: Finished difference Result 11863 states and 17804 transitions. [2020-10-27 05:37:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 05:37:35,794 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 72 [2020-10-27 05:37:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:37:35,803 INFO L225 Difference]: With dead ends: 11863 [2020-10-27 05:37:35,803 INFO L226 Difference]: Without dead ends: 7047 [2020-10-27 05:37:35,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2020-10-27 05:37:35,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7047 states. [2020-10-27 05:37:37,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7047 to 5321. [2020-10-27 05:37:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5321 states. [2020-10-27 05:37:37,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5321 states to 5321 states and 7949 transitions. [2020-10-27 05:37:37,115 INFO L78 Accepts]: Start accepts. Automaton has 5321 states and 7949 transitions. Word has length 72 [2020-10-27 05:37:37,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:37,115 INFO L481 AbstractCegarLoop]: Abstraction has 5321 states and 7949 transitions. [2020-10-27 05:37:37,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:37:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 5321 states and 7949 transitions. [2020-10-27 05:37:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 05:37:37,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:37,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 05:37:37,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 05:37:37,119 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:37,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:37,120 INFO L82 PathProgramCache]: Analyzing trace with hash 267647585, now seen corresponding path program 1 times [2020-10-27 05:37:37,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:37,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103003760] [2020-10-27 05:37:37,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:37,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:37,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:37,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:37,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:37,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:37,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking...