/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:32:18,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:32:18,839 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:32:18,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:32:18,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:32:18,864 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:32:18,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:32:18,867 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:32:18,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:32:18,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:32:18,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:32:18,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:32:18,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:32:18,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:32:18,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:32:18,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:32:18,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:32:18,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:32:18,877 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:32:18,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:32:18,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:32:18,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:32:18,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:32:18,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:32:18,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:32:18,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:32:18,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:32:18,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:32:18,887 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:32:18,888 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:32:18,888 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:32:18,889 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:32:18,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:32:18,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:32:18,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:32:18,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:32:18,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:32:18,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:32:18,894 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:32:18,895 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:32:18,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:32:18,897 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 19:32:18,945 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:32:18,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:32:18,948 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:32:18,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:32:18,949 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:32:18,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:32:18,949 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:32:18,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:32:18,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:32:18,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:32:18,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:32:18,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:32:18,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:32:18,951 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:32:18,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:32:18,952 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:32:18,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:32:18,953 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:32:18,953 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:32:18,953 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:32:18,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:32:18,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:32:18,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:32:18,954 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:32:18,954 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:32:18,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:32:18,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:32:18,955 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:32:18,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:32:18,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:32:19,238 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:32:19,250 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:32:19,257 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:32:19,259 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:32:19,260 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:32:19,261 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 19:32:19,320 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1068155f6/3f45d4373054462d9230256652fe7383/FLAGe621fd94a [2020-10-12 19:32:19,816 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:32:19,817 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 19:32:19,830 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1068155f6/3f45d4373054462d9230256652fe7383/FLAGe621fd94a [2020-10-12 19:32:20,152 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1068155f6/3f45d4373054462d9230256652fe7383 [2020-10-12 19:32:20,161 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:32:20,162 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:32:20,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:32:20,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:32:20,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:32:20,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:32:20" (1/1) ... [2020-10-12 19:32:20,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c6b7cfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:32:20, skipping insertion in model container [2020-10-12 19:32:20,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:32:20" (1/1) ... [2020-10-12 19:32:20,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:32:20,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:32:20,521 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:32:20,623 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:32:20,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:32:20,747 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:32:20,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:32:20 WrapperNode [2020-10-12 19:32:20,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:32:20,749 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:32:20,749 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:32:20,749 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:32:20,760 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:32:20" (1/1) ... [2020-10-12 19:32:20,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:32:20" (1/1) ... [2020-10-12 19:32:20,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:32:20" (1/1) ... [2020-10-12 19:32:20,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:32:20" (1/1) ... [2020-10-12 19:32:20,787 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:32:20" (1/1) ... [2020-10-12 19:32:20,796 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:32:20" (1/1) ... [2020-10-12 19:32:20,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:32:20" (1/1) ... [2020-10-12 19:32:20,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:32:20,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:32:20,804 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:32:20,804 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:32:20,805 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:32:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:32:20,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:32:20,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:32:20,862 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:32:20,862 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:32:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:32:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:32:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:32:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 19:32:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:32:20,863 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:32:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:32:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:32:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:32:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:32:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:32:20,864 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:32:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 19:32:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:32:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:32:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:32:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:32:20,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:32:21,552 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:32:21,552 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:32:21,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:32:21 BoogieIcfgContainer [2020-10-12 19:32:21,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:32:21,560 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:32:21,560 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:32:21,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:32:21,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:32:20" (1/3) ... [2020-10-12 19:32:21,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7152bb7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:32:21, skipping insertion in model container [2020-10-12 19:32:21,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:32:20" (2/3) ... [2020-10-12 19:32:21,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7152bb7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:32:21, skipping insertion in model container [2020-10-12 19:32:21,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:32:21" (3/3) ... [2020-10-12 19:32:21,567 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-12 19:32:21,578 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:32:21,586 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:32:21,601 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:32:21,627 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:32:21,627 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:32:21,627 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:32:21,627 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:32:21,628 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:32:21,628 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:32:21,628 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:32:21,628 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:32:21,656 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2020-10-12 19:32:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 19:32:21,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:21,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:32:21,672 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:21,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:21,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1081400223, now seen corresponding path program 1 times [2020-10-12 19:32:21,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:21,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346871581] [2020-10-12 19:32:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:22,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:22,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:22,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:22,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:22,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:22,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:24,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:24,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:26,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:26,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 19:32:26,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:32:26,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:32:26,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:26,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:32:26,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:32:26,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 19:32:26,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 19:32:27,264 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-12 19:32:27,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:27,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:27,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:27,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:27,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:27,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 19:32:27,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:27,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:32:27,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:27,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:32:27,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:32:27,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346871581] [2020-10-12 19:32:27,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:32:27,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:32:27,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859709435] [2020-10-12 19:32:27,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:32:27,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:27,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:32:27,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:32:27,349 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 7 states. [2020-10-12 19:32:27,654 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-12 19:32:29,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:29,258 INFO L93 Difference]: Finished difference Result 672 states and 1082 transitions. [2020-10-12 19:32:29,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:32:29,261 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-12 19:32:29,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:29,280 INFO L225 Difference]: With dead ends: 672 [2020-10-12 19:32:29,281 INFO L226 Difference]: Without dead ends: 561 [2020-10-12 19:32:29,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:32:29,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2020-10-12 19:32:29,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 276. [2020-10-12 19:32:29,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-12 19:32:29,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 404 transitions. [2020-10-12 19:32:29,381 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 404 transitions. Word has length 65 [2020-10-12 19:32:29,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:29,382 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 404 transitions. [2020-10-12 19:32:29,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:32:29,382 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 404 transitions. [2020-10-12 19:32:29,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:32:29,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:29,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:32:29,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:32:29,386 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:29,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:29,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1573434449, now seen corresponding path program 1 times [2020-10-12 19:32:29,387 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:29,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15954695] [2020-10-12 19:32:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:29,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:29,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:29,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:29,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:29,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:30,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:30,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:30,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:30,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:31,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:32,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:32,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:34,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:34,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:32:34,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:32:34,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 19:32:34,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:34,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:32:34,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:32:34,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 19:32:34,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:32:35,036 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-12 19:32:35,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:35,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:35,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:35,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:35,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:35,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:35,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:32:35,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:35,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:32:35,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:35,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:32:35,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:32:35,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:32:35,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15954695] [2020-10-12 19:32:35,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:32:35,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:32:35,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120589657] [2020-10-12 19:32:35,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:32:35,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:35,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:32:35,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:32:35,094 INFO L87 Difference]: Start difference. First operand 276 states and 404 transitions. Second operand 12 states. [2020-10-12 19:32:35,534 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 133 [2020-10-12 19:32:35,991 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-10-12 19:32:36,119 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-12 19:32:36,273 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-12 19:32:36,764 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-12 19:32:38,086 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-10-12 19:32:38,484 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-12 19:32:40,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:40,236 INFO L93 Difference]: Finished difference Result 1804 states and 2776 transitions. [2020-10-12 19:32:40,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 19:32:40,236 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-10-12 19:32:40,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:40,248 INFO L225 Difference]: With dead ends: 1804 [2020-10-12 19:32:40,248 INFO L226 Difference]: Without dead ends: 1621 [2020-10-12 19:32:40,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 19:32:40,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2020-10-12 19:32:40,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 319. [2020-10-12 19:32:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-12 19:32:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 456 transitions. [2020-10-12 19:32:40,317 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 456 transitions. Word has length 66 [2020-10-12 19:32:40,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:40,317 INFO L479 AbstractCegarLoop]: Abstraction has 319 states and 456 transitions. [2020-10-12 19:32:40,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:32:40,318 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 456 transitions. [2020-10-12 19:32:40,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:32:40,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:40,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:32:40,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:32:40,321 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:40,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:40,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1333098959, now seen corresponding path program 1 times [2020-10-12 19:32:40,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:40,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1442730367] [2020-10-12 19:32:40,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:40,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:40,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:40,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:40,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:41,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:41,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:43,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:43,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:43,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:43,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:43,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:43,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:43,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:43,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:45,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:45,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:32:45,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 19:32:45,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:32:45,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:45,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:32:45,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:32:45,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:32:45,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:45,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:45,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:45,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:45,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:45,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:45,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:32:45,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:45,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:32:45,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:45,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:32:45,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:32:45,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1442730367] [2020-10-12 19:32:45,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:32:45,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:32:45,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923876879] [2020-10-12 19:32:45,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:32:45,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:45,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:32:45,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:32:45,843 INFO L87 Difference]: Start difference. First operand 319 states and 456 transitions. Second operand 12 states. [2020-10-12 19:32:46,056 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 19:32:47,364 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-12 19:32:50,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:50,127 INFO L93 Difference]: Finished difference Result 1503 states and 2301 transitions. [2020-10-12 19:32:50,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 19:32:50,128 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-10-12 19:32:50,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:50,136 INFO L225 Difference]: With dead ends: 1503 [2020-10-12 19:32:50,136 INFO L226 Difference]: Without dead ends: 1400 [2020-10-12 19:32:50,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=531, Invalid=2331, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 19:32:50,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2020-10-12 19:32:50,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 322. [2020-10-12 19:32:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-12 19:32:50,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 458 transitions. [2020-10-12 19:32:50,188 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 458 transitions. Word has length 66 [2020-10-12 19:32:50,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:50,189 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 458 transitions. [2020-10-12 19:32:50,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:32:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 458 transitions. [2020-10-12 19:32:50,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:32:50,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:50,191 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:32:50,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:32:50,191 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:50,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:50,192 INFO L82 PathProgramCache]: Analyzing trace with hash -318482416, now seen corresponding path program 1 times [2020-10-12 19:32:50,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:50,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605649801] [2020-10-12 19:32:50,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:50,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:50,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:50,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:50,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:50,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:50,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:50,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:50,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:51,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:52,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:52,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:55,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:55,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:32:55,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 19:32:55,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:32:55,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:55,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:32:55,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:32:55,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:32:55,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:55,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:32:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:55,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:55,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:32:55,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:32:55,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:32:55,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:32:55,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:32:55,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:32:55,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:32:55,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:32:55,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:32:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:32:55,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605649801] [2020-10-12 19:32:55,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:32:55,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:32:55,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634542540] [2020-10-12 19:32:55,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:32:55,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:32:55,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:32:55,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:32:55,686 INFO L87 Difference]: Start difference. First operand 322 states and 458 transitions. Second operand 12 states. [2020-10-12 19:32:56,093 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 135 [2020-10-12 19:32:59,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:32:59,306 INFO L93 Difference]: Finished difference Result 1327 states and 2003 transitions. [2020-10-12 19:32:59,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 19:32:59,306 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-12 19:32:59,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:32:59,312 INFO L225 Difference]: With dead ends: 1327 [2020-10-12 19:32:59,313 INFO L226 Difference]: Without dead ends: 1155 [2020-10-12 19:32:59,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 19:32:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2020-10-12 19:32:59,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 301. [2020-10-12 19:32:59,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-10-12 19:32:59,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 431 transitions. [2020-10-12 19:32:59,360 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 431 transitions. Word has length 67 [2020-10-12 19:32:59,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:32:59,360 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 431 transitions. [2020-10-12 19:32:59,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:32:59,360 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 431 transitions. [2020-10-12 19:32:59,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:32:59,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:32:59,362 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:32:59,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:32:59,362 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:32:59,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:32:59,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1023291907, now seen corresponding path program 1 times [2020-10-12 19:32:59,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:32:59,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374767506] [2020-10-12 19:32:59,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:32:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:32:59,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:59,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:59,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:59,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:59,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:32:59,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:01,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:01,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:01,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:04,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:04,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:33:04,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:33:04,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:33:04,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:04,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:33:04,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 19:33:04,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 19:33:04,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:04,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:04,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:04,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:04,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:04,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:04,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:33:04,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:04,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:04,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:04,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:04,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:33:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:33:04,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374767506] [2020-10-12 19:33:04,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:04,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:33:04,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287787913] [2020-10-12 19:33:04,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:33:04,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:04,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:33:04,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:33:04,564 INFO L87 Difference]: Start difference. First operand 301 states and 431 transitions. Second operand 7 states. [2020-10-12 19:33:06,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:06,591 INFO L93 Difference]: Finished difference Result 1737 states and 2669 transitions. [2020-10-12 19:33:06,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:33:06,591 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2020-10-12 19:33:06,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:06,598 INFO L225 Difference]: With dead ends: 1737 [2020-10-12 19:33:06,598 INFO L226 Difference]: Without dead ends: 1500 [2020-10-12 19:33:06,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:33:06,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2020-10-12 19:33:06,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 710. [2020-10-12 19:33:06,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 710 states. [2020-10-12 19:33:06,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 1057 transitions. [2020-10-12 19:33:06,716 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 1057 transitions. Word has length 67 [2020-10-12 19:33:06,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:06,716 INFO L479 AbstractCegarLoop]: Abstraction has 710 states and 1057 transitions. [2020-10-12 19:33:06,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:33:06,716 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 1057 transitions. [2020-10-12 19:33:06,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:33:06,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:06,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:06,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:33:06,719 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:06,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:06,720 INFO L82 PathProgramCache]: Analyzing trace with hash -774484548, now seen corresponding path program 1 times [2020-10-12 19:33:06,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:06,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1610368164] [2020-10-12 19:33:06,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:06,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:06,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:06,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:06,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:07,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:07,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:07,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:07,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:07,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:08,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:08,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:11,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:11,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:11,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:11,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:11,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:33:11,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-12 19:33:11,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:33:11,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:11,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 19:33:11,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-12 19:33:11,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 19:33:11,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:12,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:12,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:12,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:12,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:12,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:12,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:33:12,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:12,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:12,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:12,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:12,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:33:12,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1610368164] [2020-10-12 19:33:12,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:12,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 19:33:12,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160881976] [2020-10-12 19:33:12,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:33:12,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:12,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:33:12,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:33:12,235 INFO L87 Difference]: Start difference. First operand 710 states and 1057 transitions. Second operand 15 states. [2020-10-12 19:33:12,621 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 130 [2020-10-12 19:33:13,256 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-12 19:33:13,418 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-12 19:33:13,622 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-12 19:33:17,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:17,434 INFO L93 Difference]: Finished difference Result 3607 states and 5534 transitions. [2020-10-12 19:33:17,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 19:33:17,434 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 68 [2020-10-12 19:33:17,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:17,452 INFO L225 Difference]: With dead ends: 3607 [2020-10-12 19:33:17,452 INFO L226 Difference]: Without dead ends: 3131 [2020-10-12 19:33:17,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 19:33:17,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2020-10-12 19:33:17,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 744. [2020-10-12 19:33:17,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-10-12 19:33:17,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1096 transitions. [2020-10-12 19:33:17,685 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1096 transitions. Word has length 68 [2020-10-12 19:33:17,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:17,686 INFO L479 AbstractCegarLoop]: Abstraction has 744 states and 1096 transitions. [2020-10-12 19:33:17,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:33:17,686 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1096 transitions. [2020-10-12 19:33:17,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:33:17,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:17,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:17,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:33:17,688 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:17,689 INFO L82 PathProgramCache]: Analyzing trace with hash 481407964, now seen corresponding path program 1 times [2020-10-12 19:33:17,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:17,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593916288] [2020-10-12 19:33:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:17,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:17,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:17,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:17,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:17,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:18,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:18,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:21,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:21,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:21,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:22,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:22,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:33:22,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:33:22,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:33:22,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:22,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:33:22,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:33:22,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 19:33:22,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:23,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:23,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:23,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:23,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:23,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:23,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:23,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:33:23,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:23,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:23,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:23,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:23,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:33:23,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593916288] [2020-10-12 19:33:23,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:23,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-12 19:33:23,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145370307] [2020-10-12 19:33:23,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:33:23,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:23,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:33:23,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:33:23,145 INFO L87 Difference]: Start difference. First operand 744 states and 1096 transitions. Second operand 11 states. [2020-10-12 19:33:23,339 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-12 19:33:27,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:27,188 INFO L93 Difference]: Finished difference Result 3744 states and 5805 transitions. [2020-10-12 19:33:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 19:33:27,188 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-10-12 19:33:27,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:27,203 INFO L225 Difference]: With dead ends: 3744 [2020-10-12 19:33:27,203 INFO L226 Difference]: Without dead ends: 3394 [2020-10-12 19:33:27,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-10-12 19:33:27,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3394 states. [2020-10-12 19:33:27,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3394 to 744. [2020-10-12 19:33:27,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2020-10-12 19:33:27,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1092 transitions. [2020-10-12 19:33:27,412 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1092 transitions. Word has length 68 [2020-10-12 19:33:27,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:27,412 INFO L479 AbstractCegarLoop]: Abstraction has 744 states and 1092 transitions. [2020-10-12 19:33:27,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:33:27,413 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1092 transitions. [2020-10-12 19:33:27,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:33:27,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:27,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:27,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:33:27,419 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:27,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:27,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1114388258, now seen corresponding path program 1 times [2020-10-12 19:33:27,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:27,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114092198] [2020-10-12 19:33:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:27,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:27,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:27,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:27,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:27,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:27,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:27,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:29,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:29,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:29,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:32,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:32,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:33:32,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:33:32,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:33:32,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:32,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:33:32,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:33:32,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:33:32,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:32,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:32,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:32,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:32,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:32,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:32,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:33:32,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:32,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:32,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:32,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:32,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:33:32,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114092198] [2020-10-12 19:33:32,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:32,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:33:32,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288416202] [2020-10-12 19:33:32,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:33:32,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:32,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:33:32,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:33:32,793 INFO L87 Difference]: Start difference. First operand 744 states and 1092 transitions. Second operand 12 states. [2020-10-12 19:33:32,979 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-12 19:33:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:36,183 INFO L93 Difference]: Finished difference Result 3424 states and 5244 transitions. [2020-10-12 19:33:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 19:33:36,184 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-10-12 19:33:36,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:36,194 INFO L225 Difference]: With dead ends: 3424 [2020-10-12 19:33:36,194 INFO L226 Difference]: Without dead ends: 2958 [2020-10-12 19:33:36,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=272, Invalid=1060, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 19:33:36,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2020-10-12 19:33:36,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 738. [2020-10-12 19:33:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-10-12 19:33:36,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1082 transitions. [2020-10-12 19:33:36,414 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1082 transitions. Word has length 68 [2020-10-12 19:33:36,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:36,415 INFO L479 AbstractCegarLoop]: Abstraction has 738 states and 1082 transitions. [2020-10-12 19:33:36,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:33:36,415 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1082 transitions. [2020-10-12 19:33:36,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:33:36,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:36,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:36,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:33:36,417 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:36,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:36,417 INFO L82 PathProgramCache]: Analyzing trace with hash 291603290, now seen corresponding path program 1 times [2020-10-12 19:33:36,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:36,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989793598] [2020-10-12 19:33:36,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:36,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:36,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:36,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:36,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:36,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:36,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:37,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:37,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:33:37,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:33:37,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1178 [2020-10-12 19:33:37,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:37,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:33:37,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 19:33:37,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 19:33:37,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:37,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:37,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:37,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:37,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:37,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:37,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:33:37,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:37,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:37,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:37,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:37,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:33:37,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989793598] [2020-10-12 19:33:37,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:37,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:33:37,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644478120] [2020-10-12 19:33:37,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:33:37,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:37,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:33:37,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:33:37,757 INFO L87 Difference]: Start difference. First operand 738 states and 1082 transitions. Second operand 7 states. [2020-10-12 19:33:39,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:39,084 INFO L93 Difference]: Finished difference Result 1982 states and 3047 transitions. [2020-10-12 19:33:39,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:33:39,084 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 19:33:39,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:39,090 INFO L225 Difference]: With dead ends: 1982 [2020-10-12 19:33:39,091 INFO L226 Difference]: Without dead ends: 1477 [2020-10-12 19:33:39,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:33:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2020-10-12 19:33:39,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 632. [2020-10-12 19:33:39,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 632 states. [2020-10-12 19:33:39,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 923 transitions. [2020-10-12 19:33:39,238 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 923 transitions. Word has length 69 [2020-10-12 19:33:39,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:39,238 INFO L479 AbstractCegarLoop]: Abstraction has 632 states and 923 transitions. [2020-10-12 19:33:39,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:33:39,238 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 923 transitions. [2020-10-12 19:33:39,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:33:39,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:39,240 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:39,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:33:39,240 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:39,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:39,240 INFO L82 PathProgramCache]: Analyzing trace with hash 940828710, now seen corresponding path program 1 times [2020-10-12 19:33:39,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:39,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209466008] [2020-10-12 19:33:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:39,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:39,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:39,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:39,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:39,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:39,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:40,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:40,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:33:40,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:33:40,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1235 [2020-10-12 19:33:40,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:40,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:33:40,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 19:33:40,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 19:33:40,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:40,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:40,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:40,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:40,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:40,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:40,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:33:40,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:40,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:40,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:40,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:40,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:40,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:33:40,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209466008] [2020-10-12 19:33:40,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:40,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:33:40,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067401440] [2020-10-12 19:33:40,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:33:40,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:40,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:33:40,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:33:40,635 INFO L87 Difference]: Start difference. First operand 632 states and 923 transitions. Second operand 7 states. [2020-10-12 19:33:42,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:42,232 INFO L93 Difference]: Finished difference Result 2491 states and 3873 transitions. [2020-10-12 19:33:42,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:33:42,233 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 19:33:42,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:42,242 INFO L225 Difference]: With dead ends: 2491 [2020-10-12 19:33:42,242 INFO L226 Difference]: Without dead ends: 2147 [2020-10-12 19:33:42,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:33:42,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2147 states. [2020-10-12 19:33:42,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2147 to 825. [2020-10-12 19:33:42,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 825 states. [2020-10-12 19:33:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1235 transitions. [2020-10-12 19:33:42,424 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1235 transitions. Word has length 69 [2020-10-12 19:33:42,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:42,424 INFO L479 AbstractCegarLoop]: Abstraction has 825 states and 1235 transitions. [2020-10-12 19:33:42,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:33:42,425 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1235 transitions. [2020-10-12 19:33:42,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:33:42,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:42,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:42,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:33:42,426 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:42,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:42,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1733259356, now seen corresponding path program 1 times [2020-10-12 19:33:42,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:42,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853023032] [2020-10-12 19:33:42,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:42,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:42,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:42,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:42,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:42,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:42,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:43,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:43,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:33:43,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:33:43,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-10-12 19:33:43,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:43,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:33:43,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:33:43,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 19:33:43,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:43,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:43,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:43,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:43,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:43,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:43,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:33:43,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:43,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:43,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:43,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:43,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:43,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:33:43,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853023032] [2020-10-12 19:33:43,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:43,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:33:43,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879509004] [2020-10-12 19:33:43,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:33:43,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:43,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:33:43,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:33:43,645 INFO L87 Difference]: Start difference. First operand 825 states and 1235 transitions. Second operand 7 states. [2020-10-12 19:33:43,782 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 117 [2020-10-12 19:33:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:45,532 INFO L93 Difference]: Finished difference Result 4503 states and 7050 transitions. [2020-10-12 19:33:45,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 19:33:45,532 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 19:33:45,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:45,544 INFO L225 Difference]: With dead ends: 4503 [2020-10-12 19:33:45,545 INFO L226 Difference]: Without dead ends: 3917 [2020-10-12 19:33:45,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:33:45,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3917 states. [2020-10-12 19:33:45,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3917 to 1485. [2020-10-12 19:33:45,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1485 states. [2020-10-12 19:33:45,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2250 transitions. [2020-10-12 19:33:45,903 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2250 transitions. Word has length 69 [2020-10-12 19:33:45,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:45,903 INFO L479 AbstractCegarLoop]: Abstraction has 1485 states and 2250 transitions. [2020-10-12 19:33:45,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:33:45,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2250 transitions. [2020-10-12 19:33:45,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:33:45,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:45,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:45,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:33:45,905 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:45,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:45,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1521027259, now seen corresponding path program 1 times [2020-10-12 19:33:45,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:45,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613669323] [2020-10-12 19:33:45,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:45,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:45,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:46,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:46,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:46,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:47,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:50,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:50,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:33:50,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:33:50,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:33:50,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:50,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:33:50,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:33:50,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:33:50,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:51,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:51,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:51,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:51,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:51,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:51,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:33:51,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:51,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:51,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:51,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:33:51,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613669323] [2020-10-12 19:33:51,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:51,214 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:33:51,214 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978546014] [2020-10-12 19:33:51,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:33:51,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:51,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:33:51,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:33:51,215 INFO L87 Difference]: Start difference. First operand 1485 states and 2250 transitions. Second operand 10 states. [2020-10-12 19:33:53,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:33:53,347 INFO L93 Difference]: Finished difference Result 4841 states and 7470 transitions. [2020-10-12 19:33:53,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 19:33:53,347 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-10-12 19:33:53,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:33:53,363 INFO L225 Difference]: With dead ends: 4841 [2020-10-12 19:33:53,363 INFO L226 Difference]: Without dead ends: 3625 [2020-10-12 19:33:53,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-12 19:33:53,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3625 states. [2020-10-12 19:33:53,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3625 to 1517. [2020-10-12 19:33:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1517 states. [2020-10-12 19:33:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 2285 transitions. [2020-10-12 19:33:53,777 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 2285 transitions. Word has length 70 [2020-10-12 19:33:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:33:53,777 INFO L479 AbstractCegarLoop]: Abstraction has 1517 states and 2285 transitions. [2020-10-12 19:33:53,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:33:53,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 2285 transitions. [2020-10-12 19:33:53,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:33:53,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:33:53,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:33:53,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:33:53,780 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:33:53,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:33:53,780 INFO L82 PathProgramCache]: Analyzing trace with hash -2087558118, now seen corresponding path program 1 times [2020-10-12 19:33:53,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:33:53,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653571274] [2020-10-12 19:33:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:33:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:53,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:53,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:53,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:53,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:54,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:54,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:54,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:54,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:54,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:57,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:57,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:58,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:58,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:58,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:58,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:58,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:58,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:58,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:33:58,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-12 19:33:58,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 19:33:58,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:58,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 19:33:58,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:33:58,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:33:58,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:59,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:33:59,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:33:59,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:33:59,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:33:59,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:33:59,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:33:59,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:33:59,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:33:59,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:33:59,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:33:59,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:33:59,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:33:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:33:59,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653571274] [2020-10-12 19:33:59,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:33:59,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-10-12 19:33:59,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659703729] [2020-10-12 19:33:59,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 19:33:59,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:33:59,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 19:33:59,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-12 19:33:59,278 INFO L87 Difference]: Start difference. First operand 1517 states and 2285 transitions. Second operand 17 states. [2020-10-12 19:33:59,665 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 125 [2020-10-12 19:34:07,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:07,504 INFO L93 Difference]: Finished difference Result 8248 states and 12668 transitions. [2020-10-12 19:34:07,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 19:34:07,505 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 70 [2020-10-12 19:34:07,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:07,521 INFO L225 Difference]: With dead ends: 8248 [2020-10-12 19:34:07,521 INFO L226 Difference]: Without dead ends: 7658 [2020-10-12 19:34:07,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=494, Invalid=2368, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 19:34:07,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7658 states. [2020-10-12 19:34:08,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7658 to 1578. [2020-10-12 19:34:08,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1578 states. [2020-10-12 19:34:08,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2364 transitions. [2020-10-12 19:34:08,077 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2364 transitions. Word has length 70 [2020-10-12 19:34:08,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:08,077 INFO L479 AbstractCegarLoop]: Abstraction has 1578 states and 2364 transitions. [2020-10-12 19:34:08,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 19:34:08,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2364 transitions. [2020-10-12 19:34:08,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:34:08,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:08,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:34:08,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:34:08,080 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:08,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:08,080 INFO L82 PathProgramCache]: Analyzing trace with hash 346942895, now seen corresponding path program 1 times [2020-10-12 19:34:08,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:08,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859035075] [2020-10-12 19:34:08,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:08,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:08,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:08,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:08,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:08,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:08,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:08,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:08,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:09,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:11,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:11,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:11,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:12,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:12,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:12,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:13,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:13,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:34:13,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-12 19:34:13,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:34:13,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:13,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 19:34:13,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:34:13,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:34:13,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:13,362 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2020-10-12 19:34:13,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:13,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:13,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:13,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:13,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:13,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:34:13,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:13,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:13,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:13,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:13,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:13,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859035075] [2020-10-12 19:34:13,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:13,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-12 19:34:13,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822437416] [2020-10-12 19:34:13,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 19:34:13,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:13,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 19:34:13,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:34:13,553 INFO L87 Difference]: Start difference. First operand 1578 states and 2364 transitions. Second operand 14 states. [2020-10-12 19:34:18,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:18,467 INFO L93 Difference]: Finished difference Result 7263 states and 11150 transitions. [2020-10-12 19:34:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 19:34:18,467 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 70 [2020-10-12 19:34:18,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:18,480 INFO L225 Difference]: With dead ends: 7263 [2020-10-12 19:34:18,480 INFO L226 Difference]: Without dead ends: 6670 [2020-10-12 19:34:18,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2020-10-12 19:34:18,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6670 states. [2020-10-12 19:34:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6670 to 3798. [2020-10-12 19:34:19,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3798 states. [2020-10-12 19:34:19,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 5764 transitions. [2020-10-12 19:34:19,624 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 5764 transitions. Word has length 70 [2020-10-12 19:34:19,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:19,624 INFO L479 AbstractCegarLoop]: Abstraction has 3798 states and 5764 transitions. [2020-10-12 19:34:19,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 19:34:19,624 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 5764 transitions. [2020-10-12 19:34:19,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:34:19,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:19,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:34:19,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:34:19,627 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:19,627 INFO L82 PathProgramCache]: Analyzing trace with hash 140507960, now seen corresponding path program 1 times [2020-10-12 19:34:19,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:19,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074285833] [2020-10-12 19:34:19,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:19,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:19,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:19,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:19,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:19,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:19,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:24,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:24,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:34:24,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:34:24,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:34:24,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:24,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:34:24,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:34:24,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 19:34:24,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:24,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:24,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:24,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:24,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:24,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:24,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:34:24,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:24,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:24,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:24,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:24,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:24,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074285833] [2020-10-12 19:34:24,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:24,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:34:24,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932975219] [2020-10-12 19:34:24,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:34:24,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:24,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:34:24,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:34:24,954 INFO L87 Difference]: Start difference. First operand 3798 states and 5764 transitions. Second operand 10 states. [2020-10-12 19:34:29,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:29,705 INFO L93 Difference]: Finished difference Result 11486 states and 17763 transitions. [2020-10-12 19:34:29,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 19:34:29,705 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-10-12 19:34:29,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:29,723 INFO L225 Difference]: With dead ends: 11486 [2020-10-12 19:34:29,723 INFO L226 Difference]: Without dead ends: 9134 [2020-10-12 19:34:29,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-12 19:34:29,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9134 states. [2020-10-12 19:34:31,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9134 to 3802. [2020-10-12 19:34:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3802 states. [2020-10-12 19:34:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 5744 transitions. [2020-10-12 19:34:31,027 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 5744 transitions. Word has length 70 [2020-10-12 19:34:31,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:31,028 INFO L479 AbstractCegarLoop]: Abstraction has 3802 states and 5744 transitions. [2020-10-12 19:34:31,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:34:31,028 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 5744 transitions. [2020-10-12 19:34:31,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:34:31,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:31,030 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] [2020-10-12 19:34:31,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:34:31,031 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:31,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:31,031 INFO L82 PathProgramCache]: Analyzing trace with hash -365188866, now seen corresponding path program 1 times [2020-10-12 19:34:31,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:31,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900191009] [2020-10-12 19:34:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:31,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:31,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:31,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:31,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:31,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:31,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:32,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:32,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:34:32,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:34:32,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1575 [2020-10-12 19:34:32,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:32,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:34:32,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:34:32,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 19:34:32,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:34:32,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:32,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:32,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:32,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:32,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:32,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:34:32,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:32,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:32,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:32,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:32,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:32,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900191009] [2020-10-12 19:34:32,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:32,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:34:32,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591572927] [2020-10-12 19:34:32,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:34:32,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:32,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:34:32,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:34:32,789 INFO L87 Difference]: Start difference. First operand 3802 states and 5744 transitions. Second operand 7 states. [2020-10-12 19:34:35,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:35,902 INFO L93 Difference]: Finished difference Result 7162 states and 11000 transitions. [2020-10-12 19:34:35,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:34:35,903 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-10-12 19:34:35,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:35,913 INFO L225 Difference]: With dead ends: 7162 [2020-10-12 19:34:35,913 INFO L226 Difference]: Without dead ends: 5446 [2020-10-12 19:34:35,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:34:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5446 states. [2020-10-12 19:34:36,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5446 to 2876. [2020-10-12 19:34:36,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2876 states. [2020-10-12 19:34:36,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2876 states to 2876 states and 4353 transitions. [2020-10-12 19:34:36,993 INFO L78 Accepts]: Start accepts. Automaton has 2876 states and 4353 transitions. Word has length 71 [2020-10-12 19:34:36,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:36,994 INFO L479 AbstractCegarLoop]: Abstraction has 2876 states and 4353 transitions. [2020-10-12 19:34:36,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:34:36,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2876 states and 4353 transitions. [2020-10-12 19:34:36,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:34:36,996 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:36,996 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] [2020-10-12 19:34:36,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:34:36,996 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:36,996 INFO L82 PathProgramCache]: Analyzing trace with hash -250790415, now seen corresponding path program 1 times [2020-10-12 19:34:36,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:36,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356173617] [2020-10-12 19:34:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:37,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:37,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:37,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:37,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:37,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:37,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:37,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:37,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:37,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:38,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:38,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:41,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:41,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:42,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:42,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:34:42,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-12 19:34:42,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:34:42,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:42,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 19:34:42,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:34:42,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 19:34:42,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:42,625 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-12 19:34:42,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:42,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:42,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:42,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:42,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:42,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:34:42,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:42,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:34:42,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:42,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:34:42,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:42,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356173617] [2020-10-12 19:34:42,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:42,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-12 19:34:42,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192049613] [2020-10-12 19:34:42,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 19:34:42,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:42,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 19:34:42,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2020-10-12 19:34:42,658 INFO L87 Difference]: Start difference. First operand 2876 states and 4353 transitions. Second operand 17 states. [2020-10-12 19:34:43,070 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 129 [2020-10-12 19:34:50,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:34:50,009 INFO L93 Difference]: Finished difference Result 7724 states and 11898 transitions. [2020-10-12 19:34:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:34:50,010 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-10-12 19:34:50,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:34:50,019 INFO L225 Difference]: With dead ends: 7724 [2020-10-12 19:34:50,020 INFO L226 Difference]: Without dead ends: 6898 [2020-10-12 19:34:50,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 19:34:50,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6898 states. [2020-10-12 19:34:51,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6898 to 2890. [2020-10-12 19:34:51,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2890 states. [2020-10-12 19:34:51,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2890 states to 2890 states and 4370 transitions. [2020-10-12 19:34:51,114 INFO L78 Accepts]: Start accepts. Automaton has 2890 states and 4370 transitions. Word has length 71 [2020-10-12 19:34:51,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:34:51,114 INFO L479 AbstractCegarLoop]: Abstraction has 2890 states and 4370 transitions. [2020-10-12 19:34:51,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 19:34:51,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2890 states and 4370 transitions. [2020-10-12 19:34:51,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:34:51,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:34:51,116 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] [2020-10-12 19:34:51,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:34:51,116 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:34:51,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:34:51,116 INFO L82 PathProgramCache]: Analyzing trace with hash -158039389, now seen corresponding path program 1 times [2020-10-12 19:34:51,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:34:51,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289585365] [2020-10-12 19:34:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:34:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:51,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:51,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:51,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:51,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:51,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:51,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:51,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:51,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:52,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:52,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:52,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:52,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:52,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:53,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:53,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:53,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:53,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:53,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:53,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:53,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:53,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:53,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:53,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:53,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:54,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:56,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:56,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:34:56,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-12 19:34:56,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:34:56,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:56,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 19:34:56,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 19:34:56,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 19:34:56,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:56,403 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 31 [2020-10-12 19:34:56,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:34:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:34:56,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:34:56,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:34:56,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:34:56,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:34:56,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 19:34:56,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:34:56,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:34:56,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:34:56,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:34:56,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:34:56,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:34:56,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289585365] [2020-10-12 19:34:56,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:34:56,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-10-12 19:34:56,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963246068] [2020-10-12 19:34:56,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 19:34:56,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:34:56,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 19:34:56,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:34:56,755 INFO L87 Difference]: Start difference. First operand 2890 states and 4370 transitions. Second operand 15 states. [2020-10-12 19:34:56,975 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2020-10-12 19:34:57,382 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 137 [2020-10-12 19:34:57,705 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2020-10-12 19:34:57,847 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2020-10-12 19:34:58,064 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2020-10-12 19:34:59,527 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50 [2020-10-12 19:34:59,794 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-10-12 19:35:00,046 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2020-10-12 19:35:00,305 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-12 19:35:08,638 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2020-10-12 19:35:08,879 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-12 19:35:09,099 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-12 19:35:09,336 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 42 [2020-10-12 19:35:13,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:35:13,878 INFO L93 Difference]: Finished difference Result 20669 states and 31141 transitions. [2020-10-12 19:35:13,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-12 19:35:13,878 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2020-10-12 19:35:13,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:35:13,900 INFO L225 Difference]: With dead ends: 20669 [2020-10-12 19:35:13,900 INFO L226 Difference]: Without dead ends: 18314 [2020-10-12 19:35:13,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2460 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=988, Invalid=5984, Unknown=0, NotChecked=0, Total=6972 [2020-10-12 19:35:13,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18314 states. [2020-10-12 19:35:15,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18314 to 3868. [2020-10-12 19:35:15,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3868 states. [2020-10-12 19:35:15,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3868 states to 3868 states and 5871 transitions. [2020-10-12 19:35:15,559 INFO L78 Accepts]: Start accepts. Automaton has 3868 states and 5871 transitions. Word has length 71 [2020-10-12 19:35:15,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:35:15,559 INFO L479 AbstractCegarLoop]: Abstraction has 3868 states and 5871 transitions. [2020-10-12 19:35:15,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 19:35:15,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3868 states and 5871 transitions. [2020-10-12 19:35:15,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 19:35:15,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:35:15,561 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] [2020-10-12 19:35:15,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 19:35:15,561 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:35:15,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:35:15,561 INFO L82 PathProgramCache]: Analyzing trace with hash -14617184, now seen corresponding path program 1 times [2020-10-12 19:35:15,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:35:15,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527839615] [2020-10-12 19:35:15,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:35:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:15,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:15,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:15,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:15,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:15,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:15,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:16,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:16,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 19:35:16,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:35:16,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1349 [2020-10-12 19:35:16,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:16,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:35:16,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:35:16,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 19:35:16,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:17,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:35:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:17,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:17,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:17,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:35:17,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:35:17,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:35:17,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:17,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:35:17,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:35:17,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:35:17,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:17,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:35:17,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527839615] [2020-10-12 19:35:17,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:35:17,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 19:35:17,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145707460] [2020-10-12 19:35:17,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:35:17,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:35:17,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:35:17,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:35:17,075 INFO L87 Difference]: Start difference. First operand 3868 states and 5871 transitions. Second operand 7 states. [2020-10-12 19:35:24,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:35:24,111 INFO L93 Difference]: Finished difference Result 14679 states and 22645 transitions. [2020-10-12 19:35:24,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:35:24,112 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-10-12 19:35:24,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:35:24,127 INFO L225 Difference]: With dead ends: 14679 [2020-10-12 19:35:24,127 INFO L226 Difference]: Without dead ends: 12318 [2020-10-12 19:35:24,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-12 19:35:24,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12318 states. [2020-10-12 19:35:26,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12318 to 5926. [2020-10-12 19:35:26,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5926 states. [2020-10-12 19:35:27,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 9004 transitions. [2020-10-12 19:35:27,005 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 9004 transitions. Word has length 71 [2020-10-12 19:35:27,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:35:27,005 INFO L479 AbstractCegarLoop]: Abstraction has 5926 states and 9004 transitions. [2020-10-12 19:35:27,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:35:27,006 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 9004 transitions. [2020-10-12 19:35:27,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 19:35:27,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:35:27,007 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] [2020-10-12 19:35:27,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 19:35:27,008 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:35:27,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:35:27,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1206452966, now seen corresponding path program 1 times [2020-10-12 19:35:27,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:35:27,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351912716] [2020-10-12 19:35:27,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:35:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:27,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:27,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:27,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:27,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:29,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:29,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 19:35:29,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:35:29,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2705 [2020-10-12 19:35:29,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:29,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 19:35:29,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:35:29,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:35:29,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:29,914 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-12 19:35:30,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:35:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:30,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:30,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:30,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:35:30,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:35:30,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:35:30,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:30,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:35:30,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:35:30,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:35:30,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:30,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:35:30,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351912716] [2020-10-12 19:35:30,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:35:30,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 19:35:30,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512914211] [2020-10-12 19:35:30,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 19:35:30,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:35:30,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 19:35:30,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:35:30,062 INFO L87 Difference]: Start difference. First operand 5926 states and 9004 transitions. Second operand 9 states. [2020-10-12 19:35:30,191 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-12 19:35:37,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:35:37,085 INFO L93 Difference]: Finished difference Result 15858 states and 24352 transitions. [2020-10-12 19:35:37,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:35:37,086 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-12 19:35:37,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:35:37,096 INFO L225 Difference]: With dead ends: 15858 [2020-10-12 19:35:37,096 INFO L226 Difference]: Without dead ends: 11004 [2020-10-12 19:35:37,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-12 19:35:37,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11004 states. [2020-10-12 19:35:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11004 to 4374. [2020-10-12 19:35:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4374 states. [2020-10-12 19:35:39,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4374 states to 4374 states and 6607 transitions. [2020-10-12 19:35:39,381 INFO L78 Accepts]: Start accepts. Automaton has 4374 states and 6607 transitions. Word has length 72 [2020-10-12 19:35:39,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:35:39,382 INFO L479 AbstractCegarLoop]: Abstraction has 4374 states and 6607 transitions. [2020-10-12 19:35:39,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 19:35:39,382 INFO L276 IsEmpty]: Start isEmpty. Operand 4374 states and 6607 transitions. [2020-10-12 19:35:39,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 19:35:39,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:35:39,383 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] [2020-10-12 19:35:39,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 19:35:39,383 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:35:39,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:35:39,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1558335143, now seen corresponding path program 1 times [2020-10-12 19:35:39,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:35:39,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362095211] [2020-10-12 19:35:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:35:39,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:39,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:39,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:39,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:40,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:40,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:44,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:44,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 19:35:44,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:35:44,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:35:44,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:44,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 19:35:44,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 19:35:44,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 19:35:44,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:44,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:35:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:44,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:44,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:35:44,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:35:44,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:35:44,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:35:44,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:35:44,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:35:44,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:35:44,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:35:44,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:35:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:35:44,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362095211] [2020-10-12 19:35:44,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:35:44,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 19:35:44,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423310630] [2020-10-12 19:35:44,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 19:35:44,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:35:44,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 19:35:44,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:35:44,703 INFO L87 Difference]: Start difference. First operand 4374 states and 6607 transitions. Second operand 12 states. [2020-10-12 19:35:55,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:35:55,443 INFO L93 Difference]: Finished difference Result 20501 states and 31432 transitions. [2020-10-12 19:35:55,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 19:35:55,444 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2020-10-12 19:35:55,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:35:55,462 INFO L225 Difference]: With dead ends: 20501 [2020-10-12 19:35:55,462 INFO L226 Difference]: Without dead ends: 16540 [2020-10-12 19:35:55,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-10-12 19:35:55,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16540 states. [2020-10-12 19:35:57,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16540 to 4394. [2020-10-12 19:35:57,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4394 states. [2020-10-12 19:35:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4394 states to 4394 states and 6632 transitions. [2020-10-12 19:35:57,874 INFO L78 Accepts]: Start accepts. Automaton has 4394 states and 6632 transitions. Word has length 72 [2020-10-12 19:35:57,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:35:57,874 INFO L479 AbstractCegarLoop]: Abstraction has 4394 states and 6632 transitions. [2020-10-12 19:35:57,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 19:35:57,874 INFO L276 IsEmpty]: Start isEmpty. Operand 4394 states and 6632 transitions. [2020-10-12 19:35:57,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 19:35:57,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:35:57,876 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] [2020-10-12 19:35:57,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 19:35:57,876 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:35:57,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:35:57,876 INFO L82 PathProgramCache]: Analyzing trace with hash 539870625, now seen corresponding path program 1 times [2020-10-12 19:35:57,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:35:57,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809593433] [2020-10-12 19:35:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:35:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:35:57,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:57,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:57,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:58,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:58,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:58,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:58,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:58,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:58,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:58,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:58,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:59,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:59,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:59,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:59,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:59,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:59,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:59,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:35:59,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:02,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:02,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 19:36:02,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-12 19:36:02,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:36:02,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:02,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 19:36:02,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:36:02,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 19:36:02,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:36:03,191 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42 [2020-10-12 19:36:03,532 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-12 19:36:03,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:36:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:36:03,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:36:03,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:36:03,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:36:03,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:36:03,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:36:03,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:36:03,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:36:03,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:36:03,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:36:03,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:36:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:36:03,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809593433] [2020-10-12 19:36:03,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:36:03,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-10-12 19:36:03,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314072464] [2020-10-12 19:36:03,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 19:36:03,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:36:03,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 19:36:03,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 19:36:03,586 INFO L87 Difference]: Start difference. First operand 4394 states and 6632 transitions. Second operand 13 states. [2020-10-12 19:36:03,865 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-12 19:36:18,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:36:18,299 INFO L93 Difference]: Finished difference Result 20248 states and 30831 transitions. [2020-10-12 19:36:18,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 19:36:18,300 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2020-10-12 19:36:18,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:36:18,316 INFO L225 Difference]: With dead ends: 20248 [2020-10-12 19:36:18,316 INFO L226 Difference]: Without dead ends: 16735 [2020-10-12 19:36:18,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=228, Invalid=1032, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 19:36:18,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16735 states.