/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/loops-crafted-1/mono-crafted_7.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:29:40,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:29:40,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:29:40,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:29:40,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:29:40,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:29:40,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:29:40,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:29:40,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:29:40,720 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:29:40,723 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:29:40,723 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:29:40,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:29:40,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:29:40,727 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:29:40,728 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:29:40,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:29:40,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:29:40,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:29:40,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:29:40,739 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:29:40,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:29:40,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:29:40,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:29:40,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:29:40,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:29:40,754 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:29:40,755 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:29:40,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:29:40,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:29:40,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:29:40,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:29:40,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:29:40,763 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:29:40,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:29:40,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:29:40,764 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:29:40,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:29:40,765 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:29:40,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:29:40,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:29:40,769 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 [2020-10-14 05:29:40,804 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:29:40,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:29:40,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:29:40,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:29:40,807 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:29:40,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:29:40,807 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:29:40,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:29:40,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:29:40,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:29:40,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:29:40,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:29:40,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:29:40,810 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:29:40,810 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:29:40,810 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:29:40,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:29:40,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:29:40,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:29:40,811 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:29:40,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:29:40,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:29:40,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:29:40,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:29:40,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:29:40,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:29:40,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:29:40,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:29:40,813 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:29:40,813 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:29:41,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:29:41,127 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:29:41,130 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:29:41,131 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:29:41,132 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:29:41,132 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2020-10-14 05:29:41,192 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30b0a635b/378c30270427404d83f9c755bb456bfd/FLAG8355ebcc9 [2020-10-14 05:29:41,574 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:29:41,575 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2020-10-14 05:29:41,579 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30b0a635b/378c30270427404d83f9c755bb456bfd/FLAG8355ebcc9 [2020-10-14 05:29:42,015 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/30b0a635b/378c30270427404d83f9c755bb456bfd [2020-10-14 05:29:42,025 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:29:42,027 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:29:42,029 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:29:42,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:29:42,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:29:42,034 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:29:42" (1/1) ... [2020-10-14 05:29:42,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2fc715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:42, skipping insertion in model container [2020-10-14 05:29:42,037 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:29:42" (1/1) ... [2020-10-14 05:29:42,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:29:42,062 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:29:42,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:29:42,248 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:29:42,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:29:42,284 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:29:42,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:42 WrapperNode [2020-10-14 05:29:42,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:29:42,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:29:42,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:29:42,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:29:42,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:42" (1/1) ... [2020-10-14 05:29:42,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:42" (1/1) ... [2020-10-14 05:29:42,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:42" (1/1) ... [2020-10-14 05:29:42,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:42" (1/1) ... [2020-10-14 05:29:42,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:42" (1/1) ... [2020-10-14 05:29:42,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:42" (1/1) ... [2020-10-14 05:29:42,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:42" (1/1) ... [2020-10-14 05:29:42,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:29:42,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:29:42,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:29:42,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:29:42,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:42" (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 [2020-10-14 05:29:42,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:29:42,466 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:29:42,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:29:42,466 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:29:42,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:29:42,467 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:29:42,467 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:29:42,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:29:42,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:29:42,714 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:29:42,714 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-14 05:29:42,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:29:42 BoogieIcfgContainer [2020-10-14 05:29:42,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:29:42,722 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:29:42,722 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:29:42,727 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:29:42,727 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:29:42" (1/3) ... [2020-10-14 05:29:42,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419a507c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:29:42, skipping insertion in model container [2020-10-14 05:29:42,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:29:42" (2/3) ... [2020-10-14 05:29:42,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@419a507c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:29:42, skipping insertion in model container [2020-10-14 05:29:42,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:29:42" (3/3) ... [2020-10-14 05:29:42,732 INFO L109 eAbstractionObserver]: Analyzing ICFG mono-crafted_7.c [2020-10-14 05:29:42,744 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:29:42,755 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:29:42,768 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:29:42,791 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:29:42,791 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:29:42,792 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:29:42,792 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:29:42,792 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:29:42,792 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:29:42,792 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:29:42,793 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:29:42,810 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-14 05:29:42,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 05:29:42,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:42,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:42,816 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:42,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:42,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1762590288, now seen corresponding path program 1 times [2020-10-14 05:29:42,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:42,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346017691] [2020-10-14 05:29:42,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:42,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:42,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:42,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:43,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:29:43,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:43,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-14 05:29:43,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:43,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:43,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:43,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:29:43,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:43,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:29:43,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:43,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:43,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:43,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:43,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:29:43,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:43,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:43,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:43,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:43,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:43,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:29:43,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346017691] [2020-10-14 05:29:43,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:29:43,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:29:43,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617088701] [2020-10-14 05:29:43,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:29:43,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:43,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:29:43,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:29:43,123 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-10-14 05:29:43,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:43,145 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2020-10-14 05:29:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:29:43,147 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-10-14 05:29:43,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:43,155 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:29:43,155 INFO L226 Difference]: Without dead ends: 13 [2020-10-14 05:29:43,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:29:43,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-10-14 05:29:43,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-10-14 05:29:43,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-14 05:29:43,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-10-14 05:29:43,198 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2020-10-14 05:29:43,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:43,198 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-10-14 05:29:43,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:29:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-10-14 05:29:43,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-14 05:29:43,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:43,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:43,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:29:43,201 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:43,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:43,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2052575882, now seen corresponding path program 1 times [2020-10-14 05:29:43,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:43,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815742048] [2020-10-14 05:29:43,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:43,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:43,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-14 05:29:43,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:43,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-14 05:29:43,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:43,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:43,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:29:43,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:43,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 05:29:43,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:43,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:43,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:43,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:43,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:43,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:29:43,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:43,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:43,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:43,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:43,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:43,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:29:43,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815742048] [2020-10-14 05:29:43,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:29:43,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:29:43,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721163853] [2020-10-14 05:29:43,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:29:43,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:43,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:29:43,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:43,372 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2020-10-14 05:29:43,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:43,387 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-10-14 05:29:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:29:43,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-14 05:29:43,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:43,389 INFO L225 Difference]: With dead ends: 19 [2020-10-14 05:29:43,390 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 05:29:43,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:43,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 05:29:43,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 05:29:43,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 05:29:43,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-10-14 05:29:43,396 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2020-10-14 05:29:43,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:43,396 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-10-14 05:29:43,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:29:43,397 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-10-14 05:29:43,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 05:29:43,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:43,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:43,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:29:43,398 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:43,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:43,399 INFO L82 PathProgramCache]: Analyzing trace with hash 830194858, now seen corresponding path program 1 times [2020-10-14 05:29:43,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:43,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773329816] [2020-10-14 05:29:43,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:43,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:43,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:29:43,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:29:43,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-14 05:29:43,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:43,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:43,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:29:43,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:43,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:29:43,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:43,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:43,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:43,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:43,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:43,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:29:43,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:43,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:43,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:43,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:43,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:43,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:29:43,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773329816] [2020-10-14 05:29:43,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:29:43,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:29:43,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23067629] [2020-10-14 05:29:43,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:29:43,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:43,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:29:43,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:43,567 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 3 states. [2020-10-14 05:29:43,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:43,614 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2020-10-14 05:29:43,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:29:43,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-14 05:29:43,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:43,616 INFO L225 Difference]: With dead ends: 25 [2020-10-14 05:29:43,616 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:29:43,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:43,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:29:43,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-14 05:29:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-14 05:29:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-14 05:29:43,622 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2020-10-14 05:29:43,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:43,623 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-14 05:29:43,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:29:43,623 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-14 05:29:43,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:29:43,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:43,624 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:43,624 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:29:43,624 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:43,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:43,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1836600793, now seen corresponding path program 1 times [2020-10-14 05:29:43,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:43,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885691626] [2020-10-14 05:29:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:43,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:43,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:29:43,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:29:43,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-14 05:29:43,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:43,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:43,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:29:43,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:29:43,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:29:43,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:43,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:43,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:43,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:43,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:43,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:43,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:43,720 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:43,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:43,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:43,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:43,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:29:43,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885691626] [2020-10-14 05:29:43,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:29:43,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:29:43,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583035606] [2020-10-14 05:29:43,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:29:43,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:43,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:29:43,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:43,727 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 3 states. [2020-10-14 05:29:43,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:43,752 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-10-14 05:29:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:29:43,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-14 05:29:43,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:43,754 INFO L225 Difference]: With dead ends: 25 [2020-10-14 05:29:43,754 INFO L226 Difference]: Without dead ends: 18 [2020-10-14 05:29:43,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:29:43,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-14 05:29:43,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-14 05:29:43,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 05:29:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-10-14 05:29:43,760 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2020-10-14 05:29:43,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:43,760 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-10-14 05:29:43,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:29:43,761 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-10-14 05:29:43,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:29:43,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:43,761 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:43,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:29:43,762 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:43,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1341092318, now seen corresponding path program 1 times [2020-10-14 05:29:43,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:43,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877857098] [2020-10-14 05:29:43,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:43,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:43,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:29:43,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:43,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-14 05:29:43,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:43,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:43,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:29:43,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:43,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:29:43,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:43,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:43,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:43,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:43,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:43,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:43,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:43,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:43,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:43,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:43,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:43,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 05:29:43,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877857098] [2020-10-14 05:29:43,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:43,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:29:43,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492503350] [2020-10-14 05:29:43,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:29:43,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:43,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:29:43,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:43,976 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 5 states. [2020-10-14 05:29:43,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:43,996 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-10-14 05:29:43,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:29:43,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 05:29:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:43,998 INFO L225 Difference]: With dead ends: 25 [2020-10-14 05:29:43,998 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 05:29:43,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 05:29:44,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-10-14 05:29:44,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-14 05:29:44,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-14 05:29:44,003 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 16 [2020-10-14 05:29:44,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:44,004 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-14 05:29:44,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:29:44,004 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-14 05:29:44,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 05:29:44,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:44,005 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:44,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:29:44,005 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:44,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:44,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1411348862, now seen corresponding path program 2 times [2020-10-14 05:29:44,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:44,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401538728] [2020-10-14 05:29:44,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:44,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:44,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:44,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:44,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:44,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 05:29:44,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:44,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-14 05:29:44,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:44,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:44,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:29:44,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:44,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:29:44,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:44,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:44,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:44,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:44,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:44,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:44,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:44,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:44,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:44,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:44,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:44,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:44,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:44,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:29:44,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401538728] [2020-10-14 05:29:44,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:44,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:29:44,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529811057] [2020-10-14 05:29:44,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:29:44,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:44,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:29:44,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:29:44,123 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-10-14 05:29:44,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:44,146 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-10-14 05:29:44,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:29:44,147 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-14 05:29:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:44,147 INFO L225 Difference]: With dead ends: 31 [2020-10-14 05:29:44,147 INFO L226 Difference]: Without dead ends: 20 [2020-10-14 05:29:44,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:29:44,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-14 05:29:44,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-14 05:29:44,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-14 05:29:44,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-14 05:29:44,153 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2020-10-14 05:29:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:44,153 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-14 05:29:44,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:29:44,153 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-14 05:29:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-14 05:29:44,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:44,154 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:44,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:29:44,155 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:44,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:44,155 INFO L82 PathProgramCache]: Analyzing trace with hash 600666657, now seen corresponding path program 3 times [2020-10-14 05:29:44,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:44,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242721038] [2020-10-14 05:29:44,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:44,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:44,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:44,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:44,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:44,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:44,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-14 05:29:44,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:44,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-14 05:29:44,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:44,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:44,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:29:44,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:44,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:29:44,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:44,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:44,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:44,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:44,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:44,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:44,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:44,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:44,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:44,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:44,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:44,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:44,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:44,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-14 05:29:44,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242721038] [2020-10-14 05:29:44,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:44,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:29:44,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997813921] [2020-10-14 05:29:44,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:29:44,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:44,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:29:44,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:44,372 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-10-14 05:29:44,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:44,398 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-14 05:29:44,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:29:44,399 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-14 05:29:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:44,400 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:29:44,400 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:29:44,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:44,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:29:44,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-10-14 05:29:44,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-14 05:29:44,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-10-14 05:29:44,405 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2020-10-14 05:29:44,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:44,406 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-10-14 05:29:44,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:29:44,406 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-10-14 05:29:44,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-14 05:29:44,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:44,407 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:44,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:29:44,407 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:44,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:44,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1075851772, now seen corresponding path program 4 times [2020-10-14 05:29:44,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:44,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121526214] [2020-10-14 05:29:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:44,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:44,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:44,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:44,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:44,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-14 05:29:44,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:44,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 177 [2020-10-14 05:29:44,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:44,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:29:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:29:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:29:44,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:44,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:44,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:44,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:44,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:44,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:44,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:44,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:44,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:44,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:44,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:44,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:44,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:44,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-14 05:29:44,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121526214] [2020-10-14 05:29:44,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:44,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:29:44,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245136402] [2020-10-14 05:29:44,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:29:44,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:44,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:29:44,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:29:44,621 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 4 states. [2020-10-14 05:29:44,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:44,647 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-14 05:29:44,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:29:44,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-14 05:29:44,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:44,651 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:29:44,651 INFO L226 Difference]: Without dead ends: 25 [2020-10-14 05:29:44,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:29:44,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-14 05:29:44,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-10-14 05:29:44,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 05:29:44,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-14 05:29:44,658 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 21 [2020-10-14 05:29:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:44,659 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-14 05:29:44,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:29:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-14 05:29:44,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-14 05:29:44,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:44,668 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:44,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:29:44,668 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:44,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:44,669 INFO L82 PathProgramCache]: Analyzing trace with hash -896261463, now seen corresponding path program 5 times [2020-10-14 05:29:44,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:44,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214667758] [2020-10-14 05:29:44,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:44,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:44,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:44,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:44,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:44,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-14 05:29:44,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:44,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-14 05:29:44,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:44,911 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:44,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:29:44,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:44,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:29:44,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:44,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:44,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:44,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:44,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:44,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:44,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:29:44,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:44,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:44,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:44,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:44,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:44,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:44,970 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 05:29:44,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214667758] [2020-10-14 05:29:44,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:44,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:29:44,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759578225] [2020-10-14 05:29:44,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:29:44,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:44,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:29:44,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:29:44,976 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 6 states. [2020-10-14 05:29:45,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:45,052 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-14 05:29:45,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:29:45,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-14 05:29:45,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:45,056 INFO L225 Difference]: With dead ends: 39 [2020-10-14 05:29:45,056 INFO L226 Difference]: Without dead ends: 26 [2020-10-14 05:29:45,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:29:45,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-14 05:29:45,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-14 05:29:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-14 05:29:45,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-10-14 05:29:45,066 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 23 [2020-10-14 05:29:45,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:45,066 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-10-14 05:29:45,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:29:45,066 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-10-14 05:29:45,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-14 05:29:45,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:45,067 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:45,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:29:45,067 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:45,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:45,068 INFO L82 PathProgramCache]: Analyzing trace with hash 478139660, now seen corresponding path program 6 times [2020-10-14 05:29:45,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:45,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274282563] [2020-10-14 05:29:45,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:45,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:45,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:45,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:45,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:45,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-14 05:29:45,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:45,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 361 [2020-10-14 05:29:45,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:45,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:45,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:29:45,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:29:45,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:29:45,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:45,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:45,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:45,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:45,479 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:45,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:45,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:45,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:45,480 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:45,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:45,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:45,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:45,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:29:45,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274282563] [2020-10-14 05:29:45,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:45,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:29:45,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303281448] [2020-10-14 05:29:45,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:29:45,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:45,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:29:45,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:45,484 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-10-14 05:29:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:45,539 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2020-10-14 05:29:45,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:29:45,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-10-14 05:29:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:45,540 INFO L225 Difference]: With dead ends: 37 [2020-10-14 05:29:45,541 INFO L226 Difference]: Without dead ends: 29 [2020-10-14 05:29:45,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:29:45,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-14 05:29:45,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-14 05:29:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 05:29:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-14 05:29:45,546 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2020-10-14 05:29:45,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:45,547 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-14 05:29:45,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:29:45,547 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-14 05:29:45,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-14 05:29:45,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:45,548 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:45,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 05:29:45,548 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:45,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:45,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2135852977, now seen corresponding path program 7 times [2020-10-14 05:29:45,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:45,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600311826] [2020-10-14 05:29:45,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:45,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:45,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:45,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:45,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:45,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-14 05:29:45,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:45,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-14 05:29:45,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:45,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:45,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:29:45,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:45,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:29:45,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:45,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:45,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:45,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:45,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:45,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:45,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:45,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:45,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:45,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:45,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:45,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:45,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:45,977 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-14 05:29:45,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600311826] [2020-10-14 05:29:45,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:45,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:29:45,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613995856] [2020-10-14 05:29:45,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:29:45,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:45,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:29:45,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:29:45,979 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2020-10-14 05:29:46,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:46,012 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2020-10-14 05:29:46,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:29:46,013 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-14 05:29:46,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:46,013 INFO L225 Difference]: With dead ends: 46 [2020-10-14 05:29:46,014 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:29:46,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:29:46,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:29:46,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2020-10-14 05:29:46,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-14 05:29:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-14 05:29:46,021 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 27 [2020-10-14 05:29:46,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:46,021 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-14 05:29:46,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:29:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-14 05:29:46,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-14 05:29:46,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:46,026 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:46,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 05:29:46,026 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:46,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:46,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1822470607, now seen corresponding path program 8 times [2020-10-14 05:29:46,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:46,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130191296] [2020-10-14 05:29:46,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:46,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:46,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:46,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:46,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:46,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-14 05:29:46,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:46,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-10-14 05:29:46,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:46,565 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:46,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:29:46,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:46,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-14 05:29:46,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:46,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:46,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:46,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:46,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:46,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:46,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:46,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:46,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:46,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:46,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:46,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:46,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:46,614 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 05:29:46,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130191296] [2020-10-14 05:29:46,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:46,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:29:46,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380918627] [2020-10-14 05:29:46,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:29:46,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:46,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:29:46,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:29:46,616 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-10-14 05:29:46,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:46,656 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2020-10-14 05:29:46,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:29:46,657 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-10-14 05:29:46,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:46,657 INFO L225 Difference]: With dead ends: 47 [2020-10-14 05:29:46,658 INFO L226 Difference]: Without dead ends: 31 [2020-10-14 05:29:46,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:29:46,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-14 05:29:46,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-14 05:29:46,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-14 05:29:46,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-14 05:29:46,663 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2020-10-14 05:29:46,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:46,663 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-14 05:29:46,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:29:46,663 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-14 05:29:46,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-14 05:29:46,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:46,664 INFO L422 BasicCegarLoop]: trace histogram [8, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:46,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 05:29:46,665 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:46,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:46,665 INFO L82 PathProgramCache]: Analyzing trace with hash -47970996, now seen corresponding path program 9 times [2020-10-14 05:29:46,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:46,665 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542074843] [2020-10-14 05:29:46,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:46,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:46,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:46,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:47,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:47,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-14 05:29:47,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:47,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-14 05:29:47,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:47,263 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:47,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:29:47,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:47,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:29:47,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:47,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:47,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:47,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:47,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:47,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:47,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:47,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:47,316 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:47,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:47,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:47,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:47,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-14 05:29:47,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542074843] [2020-10-14 05:29:47,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:47,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:29:47,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183856337] [2020-10-14 05:29:47,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:29:47,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:47,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:29:47,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:29:47,321 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-10-14 05:29:47,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:47,361 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2020-10-14 05:29:47,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:29:47,361 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-14 05:29:47,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:47,362 INFO L225 Difference]: With dead ends: 49 [2020-10-14 05:29:47,362 INFO L226 Difference]: Without dead ends: 33 [2020-10-14 05:29:47,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:29:47,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-14 05:29:47,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-14 05:29:47,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-14 05:29:47,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-14 05:29:47,367 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 30 [2020-10-14 05:29:47,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:47,368 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-14 05:29:47,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:29:47,368 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-14 05:29:47,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-14 05:29:47,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:47,369 INFO L422 BasicCegarLoop]: trace histogram [9, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:47,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 05:29:47,369 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:47,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:47,369 INFO L82 PathProgramCache]: Analyzing trace with hash 2048945545, now seen corresponding path program 10 times [2020-10-14 05:29:47,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:47,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638263778] [2020-10-14 05:29:47,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:47,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:47,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:47,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:47,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:47,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-14 05:29:47,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:47,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-10-14 05:29:47,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:47,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:29:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-14 05:29:47,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-14 05:29:47,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:47,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:47,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:47,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:47,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:47,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:47,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:47,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:47,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:47,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:47,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:47,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:47,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:47,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-14 05:29:47,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638263778] [2020-10-14 05:29:47,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:47,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:29:47,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132172043] [2020-10-14 05:29:47,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:29:47,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:47,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:29:47,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:29:47,884 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2020-10-14 05:29:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:47,927 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-14 05:29:47,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:29:47,927 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-14 05:29:47,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:47,928 INFO L225 Difference]: With dead ends: 45 [2020-10-14 05:29:47,928 INFO L226 Difference]: Without dead ends: 36 [2020-10-14 05:29:47,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:29:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-14 05:29:47,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-14 05:29:47,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-14 05:29:47,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-14 05:29:47,937 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 32 [2020-10-14 05:29:47,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:47,937 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-14 05:29:47,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:29:47,938 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-14 05:29:47,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-14 05:29:47,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:47,939 INFO L422 BasicCegarLoop]: trace histogram [10, 6, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:47,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 05:29:47,939 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:47,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:47,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1825011268, now seen corresponding path program 11 times [2020-10-14 05:29:47,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:47,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450694516] [2020-10-14 05:29:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:47,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:47,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:48,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:48,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:48,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-14 05:29:48,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:48,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 756 [2020-10-14 05:29:48,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:48,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:48,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:29:48,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:48,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 05:29:48,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:48,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:48,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:48,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:48,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:48,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:48,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:48,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:48,771 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:48,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:48,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:48,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 49 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-14 05:29:48,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450694516] [2020-10-14 05:29:48,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:48,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:29:48,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837308647] [2020-10-14 05:29:48,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:29:48,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:48,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:29:48,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:48,776 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 9 states. [2020-10-14 05:29:48,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:48,817 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2020-10-14 05:29:48,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:29:48,818 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 34 [2020-10-14 05:29:48,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:48,819 INFO L225 Difference]: With dead ends: 55 [2020-10-14 05:29:48,819 INFO L226 Difference]: Without dead ends: 37 [2020-10-14 05:29:48,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:48,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-14 05:29:48,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-14 05:29:48,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-14 05:29:48,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-14 05:29:48,824 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 34 [2020-10-14 05:29:48,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:48,825 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-14 05:29:48,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:29:48,825 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-14 05:29:48,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-14 05:29:48,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:48,826 INFO L422 BasicCegarLoop]: trace histogram [11, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:48,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 05:29:48,826 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:48,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:48,827 INFO L82 PathProgramCache]: Analyzing trace with hash -928286719, now seen corresponding path program 12 times [2020-10-14 05:29:48,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:48,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185038776] [2020-10-14 05:29:48,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:48,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:48,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:48,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:49,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:49,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-14 05:29:49,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:49,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 631 [2020-10-14 05:29:49,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:49,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:49,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-14 05:29:49,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 05:29:49,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-14 05:29:49,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:49,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:49,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:49,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:49,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:49,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:49,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:49,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:49,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:49,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:49,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:49,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:49,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:49,509 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 63 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-14 05:29:49,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185038776] [2020-10-14 05:29:49,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:49,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-14 05:29:49,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884283239] [2020-10-14 05:29:49,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-14 05:29:49,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:49,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-14 05:29:49,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:29:49,513 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2020-10-14 05:29:49,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:49,552 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2020-10-14 05:29:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:29:49,554 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-14 05:29:49,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:49,554 INFO L225 Difference]: With dead ends: 49 [2020-10-14 05:29:49,555 INFO L226 Difference]: Without dead ends: 40 [2020-10-14 05:29:49,556 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-14 05:29:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-14 05:29:49,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-14 05:29:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-14 05:29:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2020-10-14 05:29:49,563 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 36 [2020-10-14 05:29:49,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:49,564 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2020-10-14 05:29:49,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-14 05:29:49,565 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2020-10-14 05:29:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-14 05:29:49,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:49,565 INFO L422 BasicCegarLoop]: trace histogram [12, 7, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:49,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 05:29:49,566 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:49,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:49,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1153024700, now seen corresponding path program 13 times [2020-10-14 05:29:49,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:49,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479363194] [2020-10-14 05:29:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:49,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:49,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:49,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:50,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:50,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 05:29:50,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:50,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 750 [2020-10-14 05:29:50,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:50,326 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:50,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:29:50,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:50,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-14 05:29:50,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:50,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:50,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:50,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:50,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:50,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:50,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:50,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:50,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:50,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:50,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:50,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:50,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:50,403 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-14 05:29:50,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479363194] [2020-10-14 05:29:50,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:50,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:29:50,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979492278] [2020-10-14 05:29:50,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:29:50,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:50,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:29:50,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:29:50,407 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 10 states. [2020-10-14 05:29:50,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:50,444 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2020-10-14 05:29:50,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:29:50,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-14 05:29:50,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:50,446 INFO L225 Difference]: With dead ends: 61 [2020-10-14 05:29:50,446 INFO L226 Difference]: Without dead ends: 41 [2020-10-14 05:29:50,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:29:50,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-14 05:29:50,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-14 05:29:50,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-14 05:29:50,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-14 05:29:50,453 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 38 [2020-10-14 05:29:50,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:50,453 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-14 05:29:50,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:29:50,453 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-14 05:29:50,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 05:29:50,454 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:50,454 INFO L422 BasicCegarLoop]: trace histogram [13, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:50,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 05:29:50,454 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:50,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:50,455 INFO L82 PathProgramCache]: Analyzing trace with hash 656186873, now seen corresponding path program 14 times [2020-10-14 05:29:50,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:50,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569417793] [2020-10-14 05:29:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:50,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:50,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:50,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:51,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:51,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 05:29:51,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:51,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 756 [2020-10-14 05:29:51,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:51,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:51,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:29:51,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-14 05:29:51,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-14 05:29:51,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:51,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:51,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:51,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:51,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:51,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:51,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:51,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:51,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:51,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:51,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:51,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:51,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:51,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 88 proven. 25 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-10-14 05:29:51,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569417793] [2020-10-14 05:29:51,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:51,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-14 05:29:51,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787935562] [2020-10-14 05:29:51,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-14 05:29:51,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:51,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-14 05:29:51,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:29:51,271 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2020-10-14 05:29:51,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:51,313 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-10-14 05:29:51,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-14 05:29:51,313 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-10-14 05:29:51,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:51,314 INFO L225 Difference]: With dead ends: 53 [2020-10-14 05:29:51,314 INFO L226 Difference]: Without dead ends: 44 [2020-10-14 05:29:51,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:29:51,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-14 05:29:51,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-14 05:29:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 05:29:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-10-14 05:29:51,319 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 40 [2020-10-14 05:29:51,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:51,320 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-10-14 05:29:51,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-14 05:29:51,320 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-10-14 05:29:51,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 05:29:51,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:51,321 INFO L422 BasicCegarLoop]: trace histogram [14, 8, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:51,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 05:29:51,321 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:51,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:51,321 INFO L82 PathProgramCache]: Analyzing trace with hash -881243468, now seen corresponding path program 15 times [2020-10-14 05:29:51,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:51,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485363137] [2020-10-14 05:29:51,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:51,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:51,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:51,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:51,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:52,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:52,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-14 05:29:52,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:52,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 903 [2020-10-14 05:29:52,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:52,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:29:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:52,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:29:52,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:52,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:52,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:52,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:52,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:52,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:52,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:52,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:52,291 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:52,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:52,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:52,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:52,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 124 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-14 05:29:52,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485363137] [2020-10-14 05:29:52,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:52,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:29:52,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180703712] [2020-10-14 05:29:52,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:29:52,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:52,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:29:52,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:52,299 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 9 states. [2020-10-14 05:29:52,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:52,330 INFO L93 Difference]: Finished difference Result 91 states and 119 transitions. [2020-10-14 05:29:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:29:52,331 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-14 05:29:52,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:52,332 INFO L225 Difference]: With dead ends: 91 [2020-10-14 05:29:52,332 INFO L226 Difference]: Without dead ends: 86 [2020-10-14 05:29:52,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:52,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-14 05:29:52,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 44. [2020-10-14 05:29:52,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-14 05:29:52,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-14 05:29:52,339 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 42 [2020-10-14 05:29:52,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:52,340 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-14 05:29:52,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:29:52,340 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-14 05:29:52,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 05:29:52,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:52,341 INFO L422 BasicCegarLoop]: trace histogram [14, 8, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:52,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-14 05:29:52,341 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:52,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:52,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1513205972, now seen corresponding path program 16 times [2020-10-14 05:29:52,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:52,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852108592] [2020-10-14 05:29:52,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:52,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:52,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:52,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:53,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:53,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 05:29:53,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:53,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 944 [2020-10-14 05:29:53,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:53,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:53,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:29:53,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:53,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-14 05:29:53,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:53,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:53,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:53,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:53,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:53,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:53,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:53,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:53,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:53,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:53,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:53,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:53,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:29:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 99 proven. 72 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-14 05:29:53,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852108592] [2020-10-14 05:29:53,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:53,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:29:53,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814861402] [2020-10-14 05:29:53,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:29:53,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:53,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:29:53,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:29:53,388 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 11 states. [2020-10-14 05:29:53,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:53,433 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2020-10-14 05:29:53,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:29:53,433 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-10-14 05:29:53,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:53,434 INFO L225 Difference]: With dead ends: 69 [2020-10-14 05:29:53,434 INFO L226 Difference]: Without dead ends: 46 [2020-10-14 05:29:53,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:29:53,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-14 05:29:53,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-14 05:29:53,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-14 05:29:53,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-14 05:29:53,439 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 43 [2020-10-14 05:29:53,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:53,440 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-14 05:29:53,440 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:29:53,440 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-14 05:29:53,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 05:29:53,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:53,441 INFO L422 BasicCegarLoop]: trace histogram [15, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:53,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-14 05:29:53,441 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:53,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:53,441 INFO L82 PathProgramCache]: Analyzing trace with hash 236188175, now seen corresponding path program 17 times [2020-10-14 05:29:53,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:53,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545730687] [2020-10-14 05:29:53,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:53,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:53,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:53,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:54,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:54,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-14 05:29:54,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:54,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1099 [2020-10-14 05:29:54,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:54,547 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:54,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:29:54,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:54,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-14 05:29:54,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:54,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:54,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:54,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:54,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:54,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:54,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:54,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:54,630 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:54,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:54,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:54,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:54,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 110 proven. 90 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-14 05:29:54,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545730687] [2020-10-14 05:29:54,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:54,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:29:54,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374808580] [2020-10-14 05:29:54,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:29:54,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:54,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:29:54,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:29:54,637 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 12 states. [2020-10-14 05:29:54,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:54,679 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2020-10-14 05:29:54,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:29:54,680 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-14 05:29:54,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:54,680 INFO L225 Difference]: With dead ends: 71 [2020-10-14 05:29:54,680 INFO L226 Difference]: Without dead ends: 48 [2020-10-14 05:29:54,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:29:54,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-14 05:29:54,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-14 05:29:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-14 05:29:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-14 05:29:54,690 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 45 [2020-10-14 05:29:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:54,690 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-14 05:29:54,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:29:54,690 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-14 05:29:54,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-14 05:29:54,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:54,691 INFO L422 BasicCegarLoop]: trace histogram [16, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:54,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-14 05:29:54,691 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:54,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:54,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2071750706, now seen corresponding path program 18 times [2020-10-14 05:29:54,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:54,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957909683] [2020-10-14 05:29:54,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:54,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:54,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:54,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:55,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:55,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-14 05:29:55,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:55,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1090 [2020-10-14 05:29:55,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:55,797 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:55,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 05:29:55,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 05:29:55,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-14 05:29:55,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:55,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:55,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:55,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:55,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:55,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:55,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:55,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:55,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:55,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:55,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:55,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:55,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 130 proven. 36 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-14 05:29:55,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957909683] [2020-10-14 05:29:55,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:55,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-14 05:29:55,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902037435] [2020-10-14 05:29:55,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-14 05:29:55,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:55,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-14 05:29:55,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:55,858 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 9 states. [2020-10-14 05:29:55,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:55,903 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-14 05:29:55,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 05:29:55,903 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-14 05:29:55,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:55,904 INFO L225 Difference]: With dead ends: 61 [2020-10-14 05:29:55,904 INFO L226 Difference]: Without dead ends: 51 [2020-10-14 05:29:55,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-14 05:29:55,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-14 05:29:55,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-10-14 05:29:55,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-14 05:29:55,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-10-14 05:29:55,910 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 47 [2020-10-14 05:29:55,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:55,911 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-10-14 05:29:55,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-14 05:29:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-10-14 05:29:55,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-14 05:29:55,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:55,912 INFO L422 BasicCegarLoop]: trace histogram [17, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:55,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-14 05:29:55,912 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:55,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:55,913 INFO L82 PathProgramCache]: Analyzing trace with hash -989653993, now seen corresponding path program 19 times [2020-10-14 05:29:55,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:55,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713233636] [2020-10-14 05:29:55,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:55,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:55,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:55,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:56,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:56,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-14 05:29:56,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:56,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1002 [2020-10-14 05:29:56,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:56,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:56,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:29:56,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:56,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-14 05:29:56,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:57,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:57,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:57,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:57,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:57,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:57,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:29:57,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:57,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:57,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:57,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:57,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:57,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 299 backedges. 143 proven. 110 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-14 05:29:57,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713233636] [2020-10-14 05:29:57,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:57,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:29:57,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373398429] [2020-10-14 05:29:57,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:29:57,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:57,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:29:57,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:29:57,053 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 13 states. [2020-10-14 05:29:57,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:57,102 INFO L93 Difference]: Finished difference Result 77 states and 94 transitions. [2020-10-14 05:29:57,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:29:57,103 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-14 05:29:57,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:57,103 INFO L225 Difference]: With dead ends: 77 [2020-10-14 05:29:57,103 INFO L226 Difference]: Without dead ends: 52 [2020-10-14 05:29:57,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:29:57,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-14 05:29:57,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-10-14 05:29:57,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-14 05:29:57,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-14 05:29:57,109 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 49 [2020-10-14 05:29:57,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:57,109 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-14 05:29:57,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:29:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-14 05:29:57,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-14 05:29:57,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:57,110 INFO L422 BasicCegarLoop]: trace histogram [18, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:57,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-14 05:29:57,110 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:57,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1087520582, now seen corresponding path program 20 times [2020-10-14 05:29:57,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:57,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362106294] [2020-10-14 05:29:57,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:57,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:57,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:57,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:57,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:58,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:58,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-14 05:29:58,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:58,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1300 [2020-10-14 05:29:58,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:58,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:58,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 05:29:58,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 05:29:58,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 05:29:58,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:58,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:58,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:58,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:58,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:58,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:58,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:58,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:58,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:58,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:58,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:58,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:58,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:58,493 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 165 proven. 49 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-14 05:29:58,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362106294] [2020-10-14 05:29:58,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:58,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 05:29:58,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582942740] [2020-10-14 05:29:58,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 05:29:58,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:58,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 05:29:58,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:29:58,495 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 10 states. [2020-10-14 05:29:58,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:58,559 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-10-14 05:29:58,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-14 05:29:58,560 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-14 05:29:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:58,561 INFO L225 Difference]: With dead ends: 65 [2020-10-14 05:29:58,561 INFO L226 Difference]: Without dead ends: 55 [2020-10-14 05:29:58,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-14 05:29:58,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-14 05:29:58,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2020-10-14 05:29:58,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-14 05:29:58,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-10-14 05:29:58,572 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 51 [2020-10-14 05:29:58,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:58,573 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-10-14 05:29:58,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 05:29:58,573 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-10-14 05:29:58,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-14 05:29:58,573 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:58,574 INFO L422 BasicCegarLoop]: trace histogram [19, 11, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:58,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-14 05:29:58,575 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:58,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:58,575 INFO L82 PathProgramCache]: Analyzing trace with hash -507483489, now seen corresponding path program 21 times [2020-10-14 05:29:58,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:58,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202799428] [2020-10-14 05:29:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:58,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:58,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:58,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:58,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:59,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:59,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-14 05:29:59,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:29:59,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1117 [2020-10-14 05:29:59,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:59,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:59,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:29:59,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:29:59,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 05:29:59,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:59,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:29:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:59,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:59,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:29:59,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:29:59,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:29:59,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:29:59,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:29:59,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:29:59,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:29:59,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:29:59,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:29:59,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:29:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 371 backedges. 229 proven. 10 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-14 05:29:59,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202799428] [2020-10-14 05:29:59,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:29:59,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:29:59,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929724148] [2020-10-14 05:29:59,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:29:59,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:29:59,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:29:59,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:29:59,781 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 11 states. [2020-10-14 05:29:59,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:29:59,831 INFO L93 Difference]: Finished difference Result 132 states and 177 transitions. [2020-10-14 05:29:59,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:29:59,832 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 53 [2020-10-14 05:29:59,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:29:59,833 INFO L225 Difference]: With dead ends: 132 [2020-10-14 05:29:59,833 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 05:29:59,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:29:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 05:29:59,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 55. [2020-10-14 05:29:59,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-14 05:29:59,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-10-14 05:29:59,839 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 53 [2020-10-14 05:29:59,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:29:59,840 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-10-14 05:29:59,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:29:59,840 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-10-14 05:29:59,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-14 05:29:59,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:29:59,841 INFO L422 BasicCegarLoop]: trace histogram [19, 11, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:29:59,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-14 05:29:59,841 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:29:59,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:29:59,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1483418785, now seen corresponding path program 22 times [2020-10-14 05:29:59,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:29:59,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843358062] [2020-10-14 05:29:59,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:29:59,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:29:59,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:59,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:29:59,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:01,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:01,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-14 05:30:01,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:01,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1195 [2020-10-14 05:30:01,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:01,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:01,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:30:01,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:01,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-14 05:30:01,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:01,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:01,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:01,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:01,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:01,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:01,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:30:01,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:01,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:01,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:01,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:01,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:01,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:30:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 180 proven. 132 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 05:30:01,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843358062] [2020-10-14 05:30:01,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:01,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:30:01,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421135330] [2020-10-14 05:30:01,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:30:01,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:01,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:30:01,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:30:01,194 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 14 states. [2020-10-14 05:30:01,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:01,273 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2020-10-14 05:30:01,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:30:01,274 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-14 05:30:01,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:01,275 INFO L225 Difference]: With dead ends: 85 [2020-10-14 05:30:01,275 INFO L226 Difference]: Without dead ends: 57 [2020-10-14 05:30:01,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:30:01,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-14 05:30:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-14 05:30:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-14 05:30:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-10-14 05:30:01,284 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 54 [2020-10-14 05:30:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:01,285 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-10-14 05:30:01,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:30:01,285 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-10-14 05:30:01,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-14 05:30:01,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:01,293 INFO L422 BasicCegarLoop]: trace histogram [20, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:01,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-14 05:30:01,294 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:01,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:01,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1070469666, now seen corresponding path program 23 times [2020-10-14 05:30:01,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:01,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912623424] [2020-10-14 05:30:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:01,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:01,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:01,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:02,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:02,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-14 05:30:02,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:02,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1453 [2020-10-14 05:30:02,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:02,759 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:02,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:30:02,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:02,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 05:30:02,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:02,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:02,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:02,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:02,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:02,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:02,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:30:02,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:02,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:02,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:02,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:02,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:02,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:30:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 195 proven. 156 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-14 05:30:02,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912623424] [2020-10-14 05:30:02,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:02,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:30:02,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490399598] [2020-10-14 05:30:02,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:30:02,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:02,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:30:02,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:30:02,911 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 15 states. [2020-10-14 05:30:03,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:03,024 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2020-10-14 05:30:03,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:30:03,024 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-10-14 05:30:03,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:03,025 INFO L225 Difference]: With dead ends: 87 [2020-10-14 05:30:03,026 INFO L226 Difference]: Without dead ends: 59 [2020-10-14 05:30:03,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:30:03,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-14 05:30:03,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-14 05:30:03,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-14 05:30:03,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-10-14 05:30:03,040 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 56 [2020-10-14 05:30:03,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:03,041 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-10-14 05:30:03,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:30:03,041 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-10-14 05:30:03,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-14 05:30:03,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:03,042 INFO L422 BasicCegarLoop]: trace histogram [21, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:03,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-14 05:30:03,043 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:03,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:03,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1364022235, now seen corresponding path program 24 times [2020-10-14 05:30:03,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:03,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60092166] [2020-10-14 05:30:03,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:03,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:03,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:03,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:03,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:05,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:05,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 05:30:05,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:05,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2057 [2020-10-14 05:30:05,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:05,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:05,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-14 05:30:05,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-14 05:30:05,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-14 05:30:05,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:05,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:05,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:05,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:05,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:05,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:05,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:05,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:05,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:05,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:05,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:05,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:05,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:30:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 221 proven. 64 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-10-14 05:30:05,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60092166] [2020-10-14 05:30:05,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:05,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 05:30:05,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249204125] [2020-10-14 05:30:05,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 05:30:05,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:05,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 05:30:05,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:30:05,199 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 11 states. [2020-10-14 05:30:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:05,255 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-10-14 05:30:05,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-14 05:30:05,256 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-14 05:30:05,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:05,256 INFO L225 Difference]: With dead ends: 73 [2020-10-14 05:30:05,257 INFO L226 Difference]: Without dead ends: 62 [2020-10-14 05:30:05,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-14 05:30:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-14 05:30:05,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-14 05:30:05,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-14 05:30:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-10-14 05:30:05,262 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 58 [2020-10-14 05:30:05,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:05,263 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-10-14 05:30:05,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 05:30:05,263 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-10-14 05:30:05,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 05:30:05,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:05,264 INFO L422 BasicCegarLoop]: trace histogram [22, 13, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:05,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-14 05:30:05,264 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:05,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:05,264 INFO L82 PathProgramCache]: Analyzing trace with hash -355910314, now seen corresponding path program 25 times [2020-10-14 05:30:05,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:05,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984745741] [2020-10-14 05:30:05,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:05,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:05,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:05,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:05,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:07,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:07,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 05:30:07,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:07,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1764 [2020-10-14 05:30:07,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:07,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:07,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:30:07,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:07,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-14 05:30:07,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:07,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:07,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:07,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:07,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:07,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:07,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:07,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:07,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:07,184 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:07,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:07,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:07,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:07,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 238 proven. 182 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2020-10-14 05:30:07,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984745741] [2020-10-14 05:30:07,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:07,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:30:07,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815253398] [2020-10-14 05:30:07,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:30:07,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:07,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:30:07,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:30:07,189 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 16 states. [2020-10-14 05:30:07,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:07,259 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2020-10-14 05:30:07,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:30:07,259 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-10-14 05:30:07,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:07,260 INFO L225 Difference]: With dead ends: 93 [2020-10-14 05:30:07,260 INFO L226 Difference]: Without dead ends: 63 [2020-10-14 05:30:07,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:30:07,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-14 05:30:07,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-14 05:30:07,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-14 05:30:07,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-10-14 05:30:07,267 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 60 [2020-10-14 05:30:07,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:07,267 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-10-14 05:30:07,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:30:07,267 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-10-14 05:30:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 05:30:07,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:07,268 INFO L422 BasicCegarLoop]: trace histogram [23, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:07,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-14 05:30:07,268 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:07,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:07,269 INFO L82 PathProgramCache]: Analyzing trace with hash 328686803, now seen corresponding path program 26 times [2020-10-14 05:30:07,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:07,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532575964] [2020-10-14 05:30:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:07,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:07,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:07,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:08,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:08,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 05:30:08,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:08,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1257 [2020-10-14 05:30:08,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:08,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:08,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-14 05:30:08,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-14 05:30:08,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 05:30:08,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:08,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:08,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:08,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:08,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:08,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:08,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:08,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:08,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:08,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:08,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:08,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:08,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:08,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 266 proven. 81 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-10-14 05:30:08,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532575964] [2020-10-14 05:30:08,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:08,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-14 05:30:08,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587761650] [2020-10-14 05:30:08,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-14 05:30:08,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:08,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-14 05:30:08,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:30:08,620 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 12 states. [2020-10-14 05:30:08,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:08,690 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2020-10-14 05:30:08,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-14 05:30:08,690 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-14 05:30:08,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:08,691 INFO L225 Difference]: With dead ends: 77 [2020-10-14 05:30:08,691 INFO L226 Difference]: Without dead ends: 66 [2020-10-14 05:30:08,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-14 05:30:08,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-14 05:30:08,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-14 05:30:08,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-14 05:30:08,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2020-10-14 05:30:08,698 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 62 [2020-10-14 05:30:08,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:08,698 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2020-10-14 05:30:08,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-14 05:30:08,698 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2020-10-14 05:30:08,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 05:30:08,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:08,699 INFO L422 BasicCegarLoop]: trace histogram [24, 14, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:08,699 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-14 05:30:08,699 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:08,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:08,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1119152206, now seen corresponding path program 27 times [2020-10-14 05:30:08,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:08,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910241454] [2020-10-14 05:30:08,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:08,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:08,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:09,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:10,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:10,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 05:30:10,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:10,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1418 [2020-10-14 05:30:10,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:10,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:10,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:30:10,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:10,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-14 05:30:10,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:10,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:10,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:10,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:10,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:10,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:10,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:10,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:10,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:10,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:10,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:10,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:10,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:10,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 285 proven. 210 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-14 05:30:10,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910241454] [2020-10-14 05:30:10,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:10,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:30:10,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742720829] [2020-10-14 05:30:10,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:30:10,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:10,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:30:10,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:30:10,282 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand 17 states. [2020-10-14 05:30:10,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:10,362 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2020-10-14 05:30:10,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:30:10,363 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 64 [2020-10-14 05:30:10,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:10,364 INFO L225 Difference]: With dead ends: 99 [2020-10-14 05:30:10,364 INFO L226 Difference]: Without dead ends: 67 [2020-10-14 05:30:10,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:30:10,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-14 05:30:10,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-14 05:30:10,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-14 05:30:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-10-14 05:30:10,371 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 64 [2020-10-14 05:30:10,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:10,371 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-10-14 05:30:10,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:30:10,372 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-10-14 05:30:10,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 05:30:10,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:10,372 INFO L422 BasicCegarLoop]: trace histogram [25, 15, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:10,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-14 05:30:10,373 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:10,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:10,373 INFO L82 PathProgramCache]: Analyzing trace with hash 272433483, now seen corresponding path program 28 times [2020-10-14 05:30:10,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:10,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226504996] [2020-10-14 05:30:10,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:10,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:10,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:11,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:12,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:12,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 05:30:12,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:12,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2371 [2020-10-14 05:30:12,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:12,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:12,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-14 05:30:12,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-14 05:30:12,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-14 05:30:12,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:12,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:12,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:12,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:12,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:12,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:12,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:12,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:12,841 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:12,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:12,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:12,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:12,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 05:30:12,847 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 315 proven. 100 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-14 05:30:12,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226504996] [2020-10-14 05:30:12,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:12,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-14 05:30:12,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698326550] [2020-10-14 05:30:12,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-14 05:30:12,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:12,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-14 05:30:12,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:30:12,849 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 13 states. [2020-10-14 05:30:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:12,920 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2020-10-14 05:30:12,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-14 05:30:12,920 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-10-14 05:30:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:12,921 INFO L225 Difference]: With dead ends: 81 [2020-10-14 05:30:12,921 INFO L226 Difference]: Without dead ends: 70 [2020-10-14 05:30:12,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-14 05:30:12,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-14 05:30:12,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-14 05:30:12,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-14 05:30:12,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-10-14 05:30:12,931 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 66 [2020-10-14 05:30:12,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:12,931 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-10-14 05:30:12,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-14 05:30:12,931 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-10-14 05:30:12,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 05:30:12,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:12,932 INFO L422 BasicCegarLoop]: trace histogram [26, 15, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:12,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-14 05:30:12,933 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:12,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:12,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1400680762, now seen corresponding path program 29 times [2020-10-14 05:30:12,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:12,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103842700] [2020-10-14 05:30:12,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:12,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:12,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:13,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:14,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:14,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 05:30:14,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:14,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2019 [2020-10-14 05:30:14,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:14,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:14,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:30:14,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:14,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-14 05:30:14,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:15,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:15,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:15,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:15,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:15,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:15,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:15,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:15,077 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:15,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:15,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:15,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:15,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:15,083 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 436 proven. 15 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2020-10-14 05:30:15,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103842700] [2020-10-14 05:30:15,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:15,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:30:15,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615090535] [2020-10-14 05:30:15,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:30:15,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:15,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:30:15,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:30:15,084 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 14 states. [2020-10-14 05:30:15,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:15,151 INFO L93 Difference]: Finished difference Result 207 states and 285 transitions. [2020-10-14 05:30:15,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:30:15,153 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-10-14 05:30:15,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:15,155 INFO L225 Difference]: With dead ends: 207 [2020-10-14 05:30:15,155 INFO L226 Difference]: Without dead ends: 202 [2020-10-14 05:30:15,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:30:15,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-14 05:30:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 70. [2020-10-14 05:30:15,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-14 05:30:15,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2020-10-14 05:30:15,166 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 68 [2020-10-14 05:30:15,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:15,166 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2020-10-14 05:30:15,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:30:15,166 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2020-10-14 05:30:15,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 05:30:15,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:15,167 INFO L422 BasicCegarLoop]: trace histogram [26, 15, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:15,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-14 05:30:15,167 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:15,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:15,168 INFO L82 PathProgramCache]: Analyzing trace with hash -435892902, now seen corresponding path program 30 times [2020-10-14 05:30:15,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:15,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773660237] [2020-10-14 05:30:15,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:15,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:15,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:15,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:15,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:17,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:17,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 05:30:17,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:17,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2043 [2020-10-14 05:30:17,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:17,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:17,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:30:17,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:17,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-14 05:30:17,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:17,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:17,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:17,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:17,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:17,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:17,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:17,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:17,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:17,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:17,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:17,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:17,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 697 backedges. 336 proven. 240 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-14 05:30:17,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773660237] [2020-10-14 05:30:17,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:17,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:30:17,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266430281] [2020-10-14 05:30:17,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:30:17,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:17,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:30:17,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:30:17,400 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand 18 states. [2020-10-14 05:30:17,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:17,482 INFO L93 Difference]: Finished difference Result 107 states and 132 transitions. [2020-10-14 05:30:17,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:30:17,483 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2020-10-14 05:30:17,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:17,484 INFO L225 Difference]: With dead ends: 107 [2020-10-14 05:30:17,484 INFO L226 Difference]: Without dead ends: 72 [2020-10-14 05:30:17,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:30:17,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-14 05:30:17,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-14 05:30:17,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-14 05:30:17,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-10-14 05:30:17,491 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 69 [2020-10-14 05:30:17,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:17,491 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-10-14 05:30:17,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:30:17,492 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-10-14 05:30:17,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 05:30:17,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:17,492 INFO L422 BasicCegarLoop]: trace histogram [27, 16, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:17,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-14 05:30:17,493 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:17,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:17,493 INFO L82 PathProgramCache]: Analyzing trace with hash -242890115, now seen corresponding path program 31 times [2020-10-14 05:30:17,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:17,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688847086] [2020-10-14 05:30:17,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:17,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:17,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:18,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:19,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:19,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 05:30:19,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:19,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2079 [2020-10-14 05:30:19,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:19,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:19,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:30:19,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:19,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 05:30:19,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:19,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:19,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:19,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:19,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:19,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:19,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:19,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:19,760 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:19,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:19,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:19,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:19,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 357 proven. 272 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-14 05:30:19,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688847086] [2020-10-14 05:30:19,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:19,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:30:19,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096267611] [2020-10-14 05:30:19,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:30:19,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:19,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:30:19,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:30:19,766 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 19 states. [2020-10-14 05:30:19,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:19,848 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2020-10-14 05:30:19,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:30:19,848 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2020-10-14 05:30:19,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:19,849 INFO L225 Difference]: With dead ends: 109 [2020-10-14 05:30:19,849 INFO L226 Difference]: Without dead ends: 74 [2020-10-14 05:30:19,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:30:19,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-14 05:30:19,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-14 05:30:19,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-14 05:30:19,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 86 transitions. [2020-10-14 05:30:19,857 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 86 transitions. Word has length 71 [2020-10-14 05:30:19,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:19,857 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 86 transitions. [2020-10-14 05:30:19,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:30:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 86 transitions. [2020-10-14 05:30:19,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 05:30:19,858 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:19,858 INFO L422 BasicCegarLoop]: trace histogram [28, 17, 11, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:19,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-14 05:30:19,858 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:19,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:19,859 INFO L82 PathProgramCache]: Analyzing trace with hash 549194464, now seen corresponding path program 32 times [2020-10-14 05:30:19,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:19,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377553616] [2020-10-14 05:30:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:19,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:19,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:20,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:22,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:22,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 05:30:22,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:22,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2212 [2020-10-14 05:30:22,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:22,080 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:22,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-14 05:30:22,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-14 05:30:22,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 05:30:22,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:22,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:22,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:22,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:22,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:22,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:22,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:22,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:22,196 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:22,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:22,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:22,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:22,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 391 proven. 121 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2020-10-14 05:30:22,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377553616] [2020-10-14 05:30:22,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:22,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-14 05:30:22,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992842493] [2020-10-14 05:30:22,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-14 05:30:22,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:22,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-14 05:30:22,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:30:22,202 INFO L87 Difference]: Start difference. First operand 74 states and 86 transitions. Second operand 14 states. [2020-10-14 05:30:22,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:22,284 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2020-10-14 05:30:22,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-14 05:30:22,285 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-10-14 05:30:22,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:22,285 INFO L225 Difference]: With dead ends: 89 [2020-10-14 05:30:22,286 INFO L226 Difference]: Without dead ends: 77 [2020-10-14 05:30:22,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-14 05:30:22,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-14 05:30:22,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2020-10-14 05:30:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-14 05:30:22,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2020-10-14 05:30:22,299 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 73 [2020-10-14 05:30:22,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:22,299 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2020-10-14 05:30:22,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-14 05:30:22,299 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2020-10-14 05:30:22,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 05:30:22,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:22,300 INFO L422 BasicCegarLoop]: trace histogram [29, 17, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:22,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-14 05:30:22,301 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:22,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:22,301 INFO L82 PathProgramCache]: Analyzing trace with hash 689257989, now seen corresponding path program 33 times [2020-10-14 05:30:22,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:22,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862841641] [2020-10-14 05:30:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:22,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:22,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:23,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:24,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:24,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 05:30:24,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:24,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2446 [2020-10-14 05:30:24,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:24,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:24,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:30:24,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:24,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 05:30:24,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:24,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:24,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:24,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:24,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:24,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:24,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:30:24,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:24,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:24,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:24,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:24,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:24,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 414 proven. 306 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2020-10-14 05:30:24,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862841641] [2020-10-14 05:30:24,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:24,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:30:24,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067108321] [2020-10-14 05:30:24,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:30:24,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:24,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:30:24,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:30:24,965 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 20 states. [2020-10-14 05:30:25,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:25,059 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-10-14 05:30:25,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:30:25,061 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 75 [2020-10-14 05:30:25,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:25,062 INFO L225 Difference]: With dead ends: 115 [2020-10-14 05:30:25,062 INFO L226 Difference]: Without dead ends: 78 [2020-10-14 05:30:25,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:30:25,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-14 05:30:25,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-14 05:30:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-14 05:30:25,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2020-10-14 05:30:25,072 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 75 [2020-10-14 05:30:25,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:25,072 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2020-10-14 05:30:25,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:30:25,072 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2020-10-14 05:30:25,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 05:30:25,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:25,073 INFO L422 BasicCegarLoop]: trace histogram [30, 18, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:25,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-14 05:30:25,073 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:25,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:25,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1486787816, now seen corresponding path program 34 times [2020-10-14 05:30:25,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:25,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006557646] [2020-10-14 05:30:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:25,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:25,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:26,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:27,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:27,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-14 05:30:27,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:27,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2704 [2020-10-14 05:30:27,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:27,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-14 05:30:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-14 05:30:27,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 05:30:27,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:27,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:27,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:27,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:27,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:27,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:27,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:27,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:27,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:27,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:27,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:27,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:27,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 921 backedges. 450 proven. 144 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2020-10-14 05:30:27,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006557646] [2020-10-14 05:30:27,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:27,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-14 05:30:27,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861534985] [2020-10-14 05:30:27,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-14 05:30:27,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:27,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-14 05:30:27,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:30:27,895 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand 15 states. [2020-10-14 05:30:27,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:27,982 INFO L93 Difference]: Finished difference Result 93 states and 109 transitions. [2020-10-14 05:30:27,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-14 05:30:27,983 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 77 [2020-10-14 05:30:27,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:27,984 INFO L225 Difference]: With dead ends: 93 [2020-10-14 05:30:27,984 INFO L226 Difference]: Without dead ends: 81 [2020-10-14 05:30:27,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-14 05:30:27,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-14 05:30:27,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-14 05:30:27,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-14 05:30:27,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2020-10-14 05:30:27,991 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 77 [2020-10-14 05:30:27,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:27,991 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2020-10-14 05:30:27,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-14 05:30:27,992 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2020-10-14 05:30:27,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-14 05:30:27,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:27,993 INFO L422 BasicCegarLoop]: trace histogram [31, 18, 13, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:27,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-14 05:30:27,993 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:27,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:27,993 INFO L82 PathProgramCache]: Analyzing trace with hash -226662899, now seen corresponding path program 35 times [2020-10-14 05:30:27,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:27,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803926490] [2020-10-14 05:30:27,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:28,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:28,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:28,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:31,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:31,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-14 05:30:31,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:31,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3207 [2020-10-14 05:30:31,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:31,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:31,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:30:31,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:31,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 05:30:31,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:31,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:31,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:31,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:31,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:31,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:31,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:31,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:31,358 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:31,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:31,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:31,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:31,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:30:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 982 backedges. 619 proven. 21 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-14 05:30:31,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803926490] [2020-10-14 05:30:31,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:31,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:30:31,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925503227] [2020-10-14 05:30:31,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:30:31,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:31,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:30:31,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:30:31,367 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand 16 states. [2020-10-14 05:30:31,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:31,435 INFO L93 Difference]: Finished difference Result 268 states and 373 transitions. [2020-10-14 05:30:31,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:30:31,436 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 79 [2020-10-14 05:30:31,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:31,438 INFO L225 Difference]: With dead ends: 268 [2020-10-14 05:30:31,439 INFO L226 Difference]: Without dead ends: 263 [2020-10-14 05:30:31,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:30:31,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-14 05:30:31,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 81. [2020-10-14 05:30:31,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-14 05:30:31,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2020-10-14 05:30:31,448 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 79 [2020-10-14 05:30:31,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:31,449 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2020-10-14 05:30:31,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:30:31,449 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2020-10-14 05:30:31,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-14 05:30:31,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:31,450 INFO L422 BasicCegarLoop]: trace histogram [31, 18, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:31,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-14 05:30:31,450 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:31,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:31,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1598922483, now seen corresponding path program 36 times [2020-10-14 05:30:31,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:31,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601288226] [2020-10-14 05:30:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:31,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:31,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:33,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:34,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:34,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-14 05:30:34,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:34,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3435 [2020-10-14 05:30:34,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:34,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:34,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:30:34,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:34,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-14 05:30:34,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:35,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:35,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:35,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:35,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:35,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:35,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:35,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:35,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:35,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:35,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:35,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:35,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:35,107 INFO L134 CoverageAnalysis]: Checked inductivity of 989 backedges. 475 proven. 342 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-10-14 05:30:35,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601288226] [2020-10-14 05:30:35,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:35,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:30:35,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818419160] [2020-10-14 05:30:35,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:30:35,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:35,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:30:35,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:30:35,109 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand 21 states. [2020-10-14 05:30:35,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:35,185 INFO L93 Difference]: Finished difference Result 123 states and 152 transitions. [2020-10-14 05:30:35,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:30:35,185 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 80 [2020-10-14 05:30:35,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:35,187 INFO L225 Difference]: With dead ends: 123 [2020-10-14 05:30:35,187 INFO L226 Difference]: Without dead ends: 83 [2020-10-14 05:30:35,187 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:30:35,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-14 05:30:35,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-14 05:30:35,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-14 05:30:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2020-10-14 05:30:35,195 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 80 [2020-10-14 05:30:35,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:35,195 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2020-10-14 05:30:35,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:30:35,196 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2020-10-14 05:30:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-14 05:30:35,196 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:35,196 INFO L422 BasicCegarLoop]: trace histogram [32, 19, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:35,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-14 05:30:35,197 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:35,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:35,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1048175120, now seen corresponding path program 37 times [2020-10-14 05:30:35,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:35,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735329197] [2020-10-14 05:30:35,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:35,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:35,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:36,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:38,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:38,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-14 05:30:38,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:38,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3323 [2020-10-14 05:30:38,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:38,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:38,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:30:38,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:38,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-14 05:30:38,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:38,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:38,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:38,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:38,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:38,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:38,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:38,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:30:38,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:38,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:38,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:38,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:38,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:38,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:30:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1052 backedges. 500 proven. 380 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-10-14 05:30:38,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735329197] [2020-10-14 05:30:38,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:38,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:30:38,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193774668] [2020-10-14 05:30:38,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:30:38,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:38,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:30:38,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:30:38,764 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand 22 states. [2020-10-14 05:30:38,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:38,853 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2020-10-14 05:30:38,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:30:38,854 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 82 [2020-10-14 05:30:38,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:38,856 INFO L225 Difference]: With dead ends: 125 [2020-10-14 05:30:38,856 INFO L226 Difference]: Without dead ends: 85 [2020-10-14 05:30:38,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:30:38,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-14 05:30:38,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-14 05:30:38,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-14 05:30:38,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 99 transitions. [2020-10-14 05:30:38,864 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 99 transitions. Word has length 82 [2020-10-14 05:30:38,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:38,865 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 99 transitions. [2020-10-14 05:30:38,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:30:38,865 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 99 transitions. [2020-10-14 05:30:38,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-14 05:30:38,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:38,866 INFO L422 BasicCegarLoop]: trace histogram [33, 20, 13, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:38,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-14 05:30:38,866 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:38,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:38,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2006634925, now seen corresponding path program 38 times [2020-10-14 05:30:38,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:38,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915551856] [2020-10-14 05:30:38,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:38,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:38,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:38,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:40,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:42,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:42,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-14 05:30:42,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:42,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3457 [2020-10-14 05:30:42,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:42,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:42,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-14 05:30:42,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 05:30:42,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 05:30:42,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:42,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:42,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:42,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:42,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:42,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:42,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:42,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:42,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:42,461 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:42,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:42,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:42,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:42,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 540 proven. 169 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2020-10-14 05:30:42,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915551856] [2020-10-14 05:30:42,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:42,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-14 05:30:42,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125442715] [2020-10-14 05:30:42,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-14 05:30:42,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:42,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-14 05:30:42,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:30:42,467 INFO L87 Difference]: Start difference. First operand 85 states and 99 transitions. Second operand 16 states. [2020-10-14 05:30:42,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:42,556 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-10-14 05:30:42,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-14 05:30:42,556 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 84 [2020-10-14 05:30:42,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:42,557 INFO L225 Difference]: With dead ends: 101 [2020-10-14 05:30:42,557 INFO L226 Difference]: Without dead ends: 88 [2020-10-14 05:30:42,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-14 05:30:42,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-14 05:30:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-14 05:30:42,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-14 05:30:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2020-10-14 05:30:42,565 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 84 [2020-10-14 05:30:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:42,565 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2020-10-14 05:30:42,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-14 05:30:42,565 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2020-10-14 05:30:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-14 05:30:42,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:42,566 INFO L422 BasicCegarLoop]: trace histogram [34, 20, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:42,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-14 05:30:42,566 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:42,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:42,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1450349592, now seen corresponding path program 39 times [2020-10-14 05:30:42,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:42,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187620256] [2020-10-14 05:30:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:42,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:42,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:43,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:46,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:46,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-14 05:30:46,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:46,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3468 [2020-10-14 05:30:46,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:46,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:46,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:30:46,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:46,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-14 05:30:46,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:46,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:46,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:46,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:46,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:46,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:46,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:46,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:46,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:46,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:46,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:46,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:46,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:46,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1184 backedges. 567 proven. 420 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2020-10-14 05:30:46,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187620256] [2020-10-14 05:30:46,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:46,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:30:46,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217350430] [2020-10-14 05:30:46,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:30:46,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:46,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:30:46,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:30:46,302 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 23 states. [2020-10-14 05:30:46,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:46,400 INFO L93 Difference]: Finished difference Result 131 states and 162 transitions. [2020-10-14 05:30:46,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:30:46,401 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 86 [2020-10-14 05:30:46,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:46,402 INFO L225 Difference]: With dead ends: 131 [2020-10-14 05:30:46,402 INFO L226 Difference]: Without dead ends: 89 [2020-10-14 05:30:46,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:30:46,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-14 05:30:46,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-14 05:30:46,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-14 05:30:46,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2020-10-14 05:30:46,411 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 86 [2020-10-14 05:30:46,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:46,411 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2020-10-14 05:30:46,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:30:46,412 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2020-10-14 05:30:46,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-14 05:30:46,412 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:46,412 INFO L422 BasicCegarLoop]: trace histogram [35, 21, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:46,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-14 05:30:46,413 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:46,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:46,413 INFO L82 PathProgramCache]: Analyzing trace with hash 444070181, now seen corresponding path program 40 times [2020-10-14 05:30:46,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:46,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062577929] [2020-10-14 05:30:46,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:46,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:46,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:47,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:50,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:50,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-14 05:30:50,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:50,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3871 [2020-10-14 05:30:50,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:50,293 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:50,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-14 05:30:50,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-14 05:30:50,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-14 05:30:50,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:50,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:50,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:50,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:50,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:50,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:50,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:50,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:50,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:50,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:50,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:50,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:50,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1253 backedges. 609 proven. 196 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2020-10-14 05:30:50,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062577929] [2020-10-14 05:30:50,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:50,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-14 05:30:50,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967001265] [2020-10-14 05:30:50,449 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-14 05:30:50,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:50,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-14 05:30:50,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:30:50,450 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand 17 states. [2020-10-14 05:30:50,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:50,538 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2020-10-14 05:30:50,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-14 05:30:50,539 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 88 [2020-10-14 05:30:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:50,540 INFO L225 Difference]: With dead ends: 105 [2020-10-14 05:30:50,540 INFO L226 Difference]: Without dead ends: 92 [2020-10-14 05:30:50,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-14 05:30:50,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-14 05:30:50,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-14 05:30:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-14 05:30:50,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2020-10-14 05:30:50,549 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 88 [2020-10-14 05:30:50,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:50,550 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2020-10-14 05:30:50,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-14 05:30:50,550 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2020-10-14 05:30:50,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-14 05:30:50,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:50,551 INFO L422 BasicCegarLoop]: trace histogram [36, 21, 15, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:50,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-14 05:30:50,552 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:50,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:50,552 INFO L82 PathProgramCache]: Analyzing trace with hash 163485024, now seen corresponding path program 41 times [2020-10-14 05:30:50,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:50,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706969554] [2020-10-14 05:30:50,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:50,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:50,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:51,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:55,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:55,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-14 05:30:55,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:30:55,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4606 [2020-10-14 05:30:55,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:55,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:55,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:30:55,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:30:55,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-14 05:30:55,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:55,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:30:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:55,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:55,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:30:55,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:30:55,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:30:55,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:30:55,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:30:55,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:30:55,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:30:55,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:30:55,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:30:55,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:30:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1324 backedges. 638 proven. 462 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-10-14 05:30:55,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706969554] [2020-10-14 05:30:55,448 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:30:55,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:30:55,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813662310] [2020-10-14 05:30:55,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:30:55,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:30:55,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:30:55,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:30:55,449 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand 24 states. [2020-10-14 05:30:55,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:30:55,530 INFO L93 Difference]: Finished difference Result 137 states and 170 transitions. [2020-10-14 05:30:55,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:30:55,530 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 90 [2020-10-14 05:30:55,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:30:55,531 INFO L225 Difference]: With dead ends: 137 [2020-10-14 05:30:55,531 INFO L226 Difference]: Without dead ends: 93 [2020-10-14 05:30:55,532 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:30:55,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-14 05:30:55,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-14 05:30:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 05:30:55,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2020-10-14 05:30:55,539 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 90 [2020-10-14 05:30:55,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:30:55,540 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2020-10-14 05:30:55,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:30:55,540 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2020-10-14 05:30:55,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-14 05:30:55,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:30:55,541 INFO L422 BasicCegarLoop]: trace histogram [37, 22, 15, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:30:55,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-14 05:30:55,541 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:30:55,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:30:55,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1141490659, now seen corresponding path program 42 times [2020-10-14 05:30:55,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:30:55,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [104428497] [2020-10-14 05:30:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:30:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:30:55,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:55,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:30:57,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:00,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:00,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-14 05:31:00,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:00,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4501 [2020-10-14 05:31:00,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:00,052 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:00,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-14 05:31:00,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 05:31:00,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 05:31:00,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:00,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:00,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:00,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:00,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:00,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:00,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:00,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:00,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:00,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:00,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:00,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1397 backedges. 682 proven. 225 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2020-10-14 05:31:00,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [104428497] [2020-10-14 05:31:00,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:00,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-14 05:31:00,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411053846] [2020-10-14 05:31:00,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-14 05:31:00,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:00,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-14 05:31:00,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:31:00,219 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand 18 states. [2020-10-14 05:31:00,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:00,310 INFO L93 Difference]: Finished difference Result 109 states and 128 transitions. [2020-10-14 05:31:00,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-14 05:31:00,310 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 92 [2020-10-14 05:31:00,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:00,311 INFO L225 Difference]: With dead ends: 109 [2020-10-14 05:31:00,311 INFO L226 Difference]: Without dead ends: 96 [2020-10-14 05:31:00,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-14 05:31:00,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-14 05:31:00,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-14 05:31:00,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-14 05:31:00,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 112 transitions. [2020-10-14 05:31:00,318 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 112 transitions. Word has length 92 [2020-10-14 05:31:00,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:00,319 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 112 transitions. [2020-10-14 05:31:00,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-14 05:31:00,319 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 112 transitions. [2020-10-14 05:31:00,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-14 05:31:00,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:00,319 INFO L422 BasicCegarLoop]: trace histogram [38, 22, 16, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:00,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-14 05:31:00,320 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:00,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:00,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1152907864, now seen corresponding path program 43 times [2020-10-14 05:31:00,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:00,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036384676] [2020-10-14 05:31:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:00,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:00,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:02,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:05,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:05,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-14 05:31:05,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:05,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:31:05,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:05,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:05,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:31:05,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:05,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-14 05:31:05,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:05,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:05,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:05,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:05,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:05,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:05,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:31:05,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:05,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:05,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:05,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:05,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:05,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:31:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1472 backedges. 938 proven. 28 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2020-10-14 05:31:05,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036384676] [2020-10-14 05:31:05,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:05,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:31:05,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283757917] [2020-10-14 05:31:05,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:31:05,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:05,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:31:05,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:31:05,551 INFO L87 Difference]: Start difference. First operand 95 states and 112 transitions. Second operand 19 states. [2020-10-14 05:31:05,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:05,670 INFO L93 Difference]: Finished difference Result 374 states and 528 transitions. [2020-10-14 05:31:05,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:31:05,671 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 94 [2020-10-14 05:31:05,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:05,674 INFO L225 Difference]: With dead ends: 374 [2020-10-14 05:31:05,674 INFO L226 Difference]: Without dead ends: 369 [2020-10-14 05:31:05,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:31:05,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-14 05:31:05,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 97. [2020-10-14 05:31:05,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-14 05:31:05,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2020-10-14 05:31:05,690 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 94 [2020-10-14 05:31:05,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:05,690 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2020-10-14 05:31:05,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:31:05,691 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2020-10-14 05:31:05,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-14 05:31:05,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:05,692 INFO L422 BasicCegarLoop]: trace histogram [38, 22, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:05,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-14 05:31:05,692 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:05,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:05,694 INFO L82 PathProgramCache]: Analyzing trace with hash 980103256, now seen corresponding path program 44 times [2020-10-14 05:31:05,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:05,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892979664] [2020-10-14 05:31:05,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:05,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:05,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:07,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:10,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:10,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-14 05:31:10,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:10,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:31:10,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:10,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:10,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:31:10,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:10,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-14 05:31:10,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:11,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:11,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:11,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:11,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:11,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:11,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:11,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:31:11,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:11,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:11,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:11,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:11,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:11,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1489 backedges. 713 proven. 506 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-10-14 05:31:11,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892979664] [2020-10-14 05:31:11,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:11,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:31:11,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506422620] [2020-10-14 05:31:11,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:31:11,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:11,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:31:11,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:31:11,017 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand 25 states. [2020-10-14 05:31:11,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:11,129 INFO L93 Difference]: Finished difference Result 147 states and 182 transitions. [2020-10-14 05:31:11,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:31:11,130 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 96 [2020-10-14 05:31:11,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:11,131 INFO L225 Difference]: With dead ends: 147 [2020-10-14 05:31:11,131 INFO L226 Difference]: Without dead ends: 99 [2020-10-14 05:31:11,132 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:31:11,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-14 05:31:11,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-14 05:31:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-14 05:31:11,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2020-10-14 05:31:11,141 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 96 [2020-10-14 05:31:11,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:11,141 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2020-10-14 05:31:11,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:31:11,142 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2020-10-14 05:31:11,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-14 05:31:11,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:11,142 INFO L422 BasicCegarLoop]: trace histogram [39, 23, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:11,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-14 05:31:11,143 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:11,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:11,143 INFO L82 PathProgramCache]: Analyzing trace with hash 2143819093, now seen corresponding path program 45 times [2020-10-14 05:31:11,143 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:11,143 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958260273] [2020-10-14 05:31:11,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:11,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:11,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:13,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:16,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:16,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-14 05:31:16,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:16,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 05:31:16,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:16,150 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:16,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:31:16,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:16,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 05:31:16,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:16,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:16,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:16,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:16,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:16,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:16,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:16,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:16,540 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:16,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:16,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:16,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:16,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:31:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1566 backedges. 744 proven. 552 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2020-10-14 05:31:16,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958260273] [2020-10-14 05:31:16,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:16,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:31:16,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932206551] [2020-10-14 05:31:16,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:31:16,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:16,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:31:16,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:31:16,559 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand 26 states. [2020-10-14 05:31:16,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:16,694 INFO L93 Difference]: Finished difference Result 149 states and 184 transitions. [2020-10-14 05:31:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:31:16,694 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 98 [2020-10-14 05:31:16,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:16,695 INFO L225 Difference]: With dead ends: 149 [2020-10-14 05:31:16,695 INFO L226 Difference]: Without dead ends: 101 [2020-10-14 05:31:16,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:31:16,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-14 05:31:16,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-14 05:31:16,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-14 05:31:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2020-10-14 05:31:16,707 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 98 [2020-10-14 05:31:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:16,707 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2020-10-14 05:31:16,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:31:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2020-10-14 05:31:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-14 05:31:16,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:16,708 INFO L422 BasicCegarLoop]: trace histogram [40, 24, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:16,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-14 05:31:16,708 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:16,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:16,709 INFO L82 PathProgramCache]: Analyzing trace with hash -511725806, now seen corresponding path program 46 times [2020-10-14 05:31:16,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:16,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320163533] [2020-10-14 05:31:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:16,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:16,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:18,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:21,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:21,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-14 05:31:21,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:21,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:31:21,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:21,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:21,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-14 05:31:21,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-14 05:31:21,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 05:31:21,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:21,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:21,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:21,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:21,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:21,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:21,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:21,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:21,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:21,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:21,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:21,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:21,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 792 proven. 256 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2020-10-14 05:31:21,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320163533] [2020-10-14 05:31:21,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:21,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-14 05:31:21,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768884961] [2020-10-14 05:31:21,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-14 05:31:21,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:21,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-14 05:31:21,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:31:21,960 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand 19 states. [2020-10-14 05:31:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:22,056 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2020-10-14 05:31:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-14 05:31:22,057 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 100 [2020-10-14 05:31:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:22,058 INFO L225 Difference]: With dead ends: 119 [2020-10-14 05:31:22,058 INFO L226 Difference]: Without dead ends: 104 [2020-10-14 05:31:22,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-14 05:31:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-14 05:31:22,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-14 05:31:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-14 05:31:22,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2020-10-14 05:31:22,069 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 100 [2020-10-14 05:31:22,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:22,069 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2020-10-14 05:31:22,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-14 05:31:22,069 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2020-10-14 05:31:22,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-14 05:31:22,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:22,070 INFO L422 BasicCegarLoop]: trace histogram [41, 24, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:22,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-14 05:31:22,071 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:22,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:22,072 INFO L82 PathProgramCache]: Analyzing trace with hash 659362125, now seen corresponding path program 47 times [2020-10-14 05:31:22,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:22,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621969599] [2020-10-14 05:31:22,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:22,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:22,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:24,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:27,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:27,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-14 05:31:27,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:27,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 05:31:27,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:27,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:27,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:31:27,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:27,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-14 05:31:27,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:27,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:27,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:27,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:27,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:27,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:27,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:27,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:31:27,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:27,483 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:27,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:27,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:27,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:27,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:31:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1726 backedges. 825 proven. 600 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-14 05:31:27,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621969599] [2020-10-14 05:31:27,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:27,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:31:27,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082673598] [2020-10-14 05:31:27,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:31:27,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:27,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:31:27,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:31:27,504 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand 27 states. [2020-10-14 05:31:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:27,655 INFO L93 Difference]: Finished difference Result 155 states and 192 transitions. [2020-10-14 05:31:27,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:31:27,655 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 102 [2020-10-14 05:31:27,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:27,657 INFO L225 Difference]: With dead ends: 155 [2020-10-14 05:31:27,657 INFO L226 Difference]: Without dead ends: 105 [2020-10-14 05:31:27,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:31:27,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-14 05:31:27,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-14 05:31:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-14 05:31:27,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2020-10-14 05:31:27,673 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 102 [2020-10-14 05:31:27,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:27,673 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2020-10-14 05:31:27,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:31:27,674 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2020-10-14 05:31:27,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-14 05:31:27,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:27,675 INFO L422 BasicCegarLoop]: trace histogram [42, 25, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:27,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-14 05:31:27,675 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:27,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:27,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1274512522, now seen corresponding path program 48 times [2020-10-14 05:31:27,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:27,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93264659] [2020-10-14 05:31:27,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:27,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:27,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:30,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:32,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:32,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-14 05:31:32,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:32,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:31:32,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:32,691 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-14 05:31:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-14 05:31:32,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-14 05:31:32,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:32,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:32,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:32,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:32,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:32,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:32,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:32,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:32,897 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:32,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:32,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:32,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:32,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:32,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 875 proven. 289 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2020-10-14 05:31:32,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93264659] [2020-10-14 05:31:32,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:32,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-14 05:31:32,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746345593] [2020-10-14 05:31:32,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-14 05:31:32,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:32,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-14 05:31:32,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:31:32,907 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand 20 states. [2020-10-14 05:31:33,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:33,036 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2020-10-14 05:31:33,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-14 05:31:33,036 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 104 [2020-10-14 05:31:33,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:33,037 INFO L225 Difference]: With dead ends: 123 [2020-10-14 05:31:33,037 INFO L226 Difference]: Without dead ends: 108 [2020-10-14 05:31:33,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-14 05:31:33,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-14 05:31:33,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-14 05:31:33,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-14 05:31:33,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-10-14 05:31:33,052 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 104 [2020-10-14 05:31:33,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:33,052 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-10-14 05:31:33,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-14 05:31:33,052 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-10-14 05:31:33,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-14 05:31:33,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:33,053 INFO L422 BasicCegarLoop]: trace histogram [43, 25, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:33,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-14 05:31:33,053 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:33,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:33,054 INFO L82 PathProgramCache]: Analyzing trace with hash -752523067, now seen corresponding path program 49 times [2020-10-14 05:31:33,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:33,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009658512] [2020-10-14 05:31:33,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:33,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:33,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:35,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:38,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:38,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-14 05:31:38,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:38,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:31:38,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:38,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:38,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:31:38,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:38,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 05:31:38,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:38,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:38,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:38,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:38,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:38,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:38,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:38,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:38,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:38,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:38,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:38,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:38,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1894 backedges. 910 proven. 650 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-10-14 05:31:38,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009658512] [2020-10-14 05:31:38,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:38,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:31:38,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718423977] [2020-10-14 05:31:38,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:31:38,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:38,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:31:38,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:31:38,445 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 28 states. [2020-10-14 05:31:38,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:38,566 INFO L93 Difference]: Finished difference Result 161 states and 200 transitions. [2020-10-14 05:31:38,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:31:38,566 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-10-14 05:31:38,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:38,567 INFO L225 Difference]: With dead ends: 161 [2020-10-14 05:31:38,567 INFO L226 Difference]: Without dead ends: 109 [2020-10-14 05:31:38,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:31:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-14 05:31:38,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-14 05:31:38,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-14 05:31:38,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2020-10-14 05:31:38,577 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 106 [2020-10-14 05:31:38,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:38,577 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2020-10-14 05:31:38,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:31:38,577 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2020-10-14 05:31:38,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-14 05:31:38,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:38,578 INFO L422 BasicCegarLoop]: trace histogram [44, 26, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:38,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-14 05:31:38,579 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:38,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:38,579 INFO L82 PathProgramCache]: Analyzing trace with hash -356911742, now seen corresponding path program 50 times [2020-10-14 05:31:38,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:38,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351467448] [2020-10-14 05:31:38,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:38,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:38,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:41,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:43,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:43,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-14 05:31:43,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:43,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:31:43,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:43,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:43,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:31:43,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:43,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 05:31:43,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:44,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:44,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:44,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:44,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:44,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:44,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:31:44,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:44,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:44,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:44,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:44,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:44,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 945 proven. 702 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-10-14 05:31:44,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351467448] [2020-10-14 05:31:44,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:44,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:31:44,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669501550] [2020-10-14 05:31:44,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:31:44,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:44,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:31:44,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:31:44,035 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand 29 states. [2020-10-14 05:31:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:44,156 INFO L93 Difference]: Finished difference Result 163 states and 202 transitions. [2020-10-14 05:31:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:31:44,157 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 108 [2020-10-14 05:31:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:44,158 INFO L225 Difference]: With dead ends: 163 [2020-10-14 05:31:44,158 INFO L226 Difference]: Without dead ends: 111 [2020-10-14 05:31:44,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:31:44,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-14 05:31:44,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-14 05:31:44,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-14 05:31:44,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2020-10-14 05:31:44,171 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 108 [2020-10-14 05:31:44,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:44,171 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2020-10-14 05:31:44,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:31:44,171 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2020-10-14 05:31:44,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-14 05:31:44,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:44,172 INFO L422 BasicCegarLoop]: trace histogram [45, 27, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:44,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-14 05:31:44,172 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:44,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:44,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1868449535, now seen corresponding path program 51 times [2020-10-14 05:31:44,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:44,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497007044] [2020-10-14 05:31:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:44,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:44,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:47,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:49,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:49,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-14 05:31:49,188 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:49,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:31:49,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:49,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:49,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-14 05:31:49,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 64 [2020-10-14 05:31:49,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-14 05:31:49,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:49,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:49,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:49,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:49,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:49,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:49,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:49,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:49,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:49,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:49,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:49,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:49,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2070 backedges. 999 proven. 324 refuted. 0 times theorem prover too weak. 747 trivial. 0 not checked. [2020-10-14 05:31:49,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497007044] [2020-10-14 05:31:49,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:49,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-14 05:31:49,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990439152] [2020-10-14 05:31:49,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-14 05:31:49,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:49,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-14 05:31:49,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:31:49,428 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand 21 states. [2020-10-14 05:31:49,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:49,548 INFO L93 Difference]: Finished difference Result 129 states and 151 transitions. [2020-10-14 05:31:49,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-14 05:31:49,549 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2020-10-14 05:31:49,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:49,550 INFO L225 Difference]: With dead ends: 129 [2020-10-14 05:31:49,550 INFO L226 Difference]: Without dead ends: 114 [2020-10-14 05:31:49,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-14 05:31:49,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-14 05:31:49,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-14 05:31:49,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-14 05:31:49,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 133 transitions. [2020-10-14 05:31:49,560 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 133 transitions. Word has length 110 [2020-10-14 05:31:49,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:49,561 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 133 transitions. [2020-10-14 05:31:49,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-14 05:31:49,561 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 133 transitions. [2020-10-14 05:31:49,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-14 05:31:49,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:49,562 INFO L422 BasicCegarLoop]: trace histogram [46, 27, 19, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:49,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-14 05:31:49,562 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:49,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:49,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1209703942, now seen corresponding path program 52 times [2020-10-14 05:31:49,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:49,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201500353] [2020-10-14 05:31:49,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:49,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:49,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:52,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:54,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:54,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-14 05:31:54,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:31:54,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:31:54,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:54,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:54,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-14 05:31:54,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:31:54,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-14 05:31:54,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:31:54,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:31:54,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:54,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:54,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:31:54,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:31:54,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:31:54,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:31:54,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:31:54,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:31:54,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:31:54,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:31:54,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:31:54,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:31:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2161 backedges. 1036 proven. 756 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2020-10-14 05:31:55,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201500353] [2020-10-14 05:31:55,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:31:55,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-14 05:31:55,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539198121] [2020-10-14 05:31:55,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-14 05:31:55,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:31:55,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-14 05:31:55,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:31:55,002 INFO L87 Difference]: Start difference. First operand 113 states and 133 transitions. Second operand 30 states. [2020-10-14 05:31:55,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:31:55,131 INFO L93 Difference]: Finished difference Result 169 states and 210 transitions. [2020-10-14 05:31:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 05:31:55,133 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 112 [2020-10-14 05:31:55,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:31:55,134 INFO L225 Difference]: With dead ends: 169 [2020-10-14 05:31:55,134 INFO L226 Difference]: Without dead ends: 115 [2020-10-14 05:31:55,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-14 05:31:55,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-14 05:31:55,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-14 05:31:55,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-14 05:31:55,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 135 transitions. [2020-10-14 05:31:55,143 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 135 transitions. Word has length 112 [2020-10-14 05:31:55,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:31:55,143 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 135 transitions. [2020-10-14 05:31:55,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-14 05:31:55,143 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 135 transitions. [2020-10-14 05:31:55,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-14 05:31:55,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:31:55,144 INFO L422 BasicCegarLoop]: trace histogram [47, 28, 19, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:31:55,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-14 05:31:55,144 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:31:55,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:31:55,145 INFO L82 PathProgramCache]: Analyzing trace with hash -958747401, now seen corresponding path program 53 times [2020-10-14 05:31:55,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:31:55,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194037666] [2020-10-14 05:31:55,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:31:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:31:55,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:55,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:31:58,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:00,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:00,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-14 05:32:00,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:32:00,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:32:00,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:00,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:00,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-14 05:32:00,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-14 05:32:00,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 05:32:00,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:00,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:00,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:00,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:00,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:00,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:00,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:00,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:00,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:00,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:00,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:00,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:00,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:00,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2254 backedges. 1092 proven. 361 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2020-10-14 05:32:00,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194037666] [2020-10-14 05:32:00,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:00,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-14 05:32:00,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875395444] [2020-10-14 05:32:00,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-14 05:32:00,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:00,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-14 05:32:00,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:32:00,397 INFO L87 Difference]: Start difference. First operand 115 states and 135 transitions. Second operand 22 states. [2020-10-14 05:32:00,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:00,525 INFO L93 Difference]: Finished difference Result 133 states and 156 transitions. [2020-10-14 05:32:00,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-14 05:32:00,525 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 114 [2020-10-14 05:32:00,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:00,526 INFO L225 Difference]: With dead ends: 133 [2020-10-14 05:32:00,527 INFO L226 Difference]: Without dead ends: 118 [2020-10-14 05:32:00,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-14 05:32:00,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-14 05:32:00,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-14 05:32:00,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-14 05:32:00,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2020-10-14 05:32:00,538 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 114 [2020-10-14 05:32:00,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:00,538 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2020-10-14 05:32:00,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-14 05:32:00,539 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2020-10-14 05:32:00,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-14 05:32:00,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:00,540 INFO L422 BasicCegarLoop]: trace histogram [48, 28, 20, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:00,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-14 05:32:00,540 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:00,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:00,540 INFO L82 PathProgramCache]: Analyzing trace with hash 568338930, now seen corresponding path program 54 times [2020-10-14 05:32:00,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:00,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990141542] [2020-10-14 05:32:00,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:00,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:00,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:03,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:05,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:05,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-14 05:32:05,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:32:05,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:32:05,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:05,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:05,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-14 05:32:05,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:05,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 05:32:05,557 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:06,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:06,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:06,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:06,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:06,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:06,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:06,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:06,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:06,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:06,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:06,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:06,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2349 backedges. 1131 proven. 812 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2020-10-14 05:32:06,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990141542] [2020-10-14 05:32:06,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:06,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-14 05:32:06,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989720447] [2020-10-14 05:32:06,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-14 05:32:06,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:06,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-14 05:32:06,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:32:06,014 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand 31 states. [2020-10-14 05:32:06,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:06,159 INFO L93 Difference]: Finished difference Result 175 states and 218 transitions. [2020-10-14 05:32:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-14 05:32:06,160 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 116 [2020-10-14 05:32:06,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:06,161 INFO L225 Difference]: With dead ends: 175 [2020-10-14 05:32:06,161 INFO L226 Difference]: Without dead ends: 119 [2020-10-14 05:32:06,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-14 05:32:06,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-14 05:32:06,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-14 05:32:06,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-14 05:32:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 140 transitions. [2020-10-14 05:32:06,172 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 140 transitions. Word has length 116 [2020-10-14 05:32:06,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:06,172 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 140 transitions. [2020-10-14 05:32:06,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-14 05:32:06,173 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 140 transitions. [2020-10-14 05:32:06,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-14 05:32:06,173 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:06,174 INFO L422 BasicCegarLoop]: trace histogram [49, 29, 20, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:06,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-14 05:32:06,174 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:06,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:06,174 INFO L82 PathProgramCache]: Analyzing trace with hash -821186961, now seen corresponding path program 55 times [2020-10-14 05:32:06,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:06,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115841086] [2020-10-14 05:32:06,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:06,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:06,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:10,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:11,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:11,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-14 05:32:11,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:32:11,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-14 05:32:11,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:11,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:11,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-14 05:32:11,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-14 05:32:11,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-14 05:32:11,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:11,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:11,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:11,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:11,453 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:11,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:11,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:11,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:11,454 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:11,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:11,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:11,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:11,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2446 backedges. 1189 proven. 400 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-10-14 05:32:11,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115841086] [2020-10-14 05:32:11,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:11,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-14 05:32:11,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175759590] [2020-10-14 05:32:11,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-14 05:32:11,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:11,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-14 05:32:11,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:32:11,467 INFO L87 Difference]: Start difference. First operand 119 states and 140 transitions. Second operand 23 states. [2020-10-14 05:32:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:11,588 INFO L93 Difference]: Finished difference Result 137 states and 161 transitions. [2020-10-14 05:32:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 05:32:11,589 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 118 [2020-10-14 05:32:11,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:11,589 INFO L225 Difference]: With dead ends: 137 [2020-10-14 05:32:11,589 INFO L226 Difference]: Without dead ends: 122 [2020-10-14 05:32:11,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-14 05:32:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-14 05:32:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-14 05:32:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-14 05:32:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2020-10-14 05:32:11,600 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 118 [2020-10-14 05:32:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:11,601 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2020-10-14 05:32:11,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-14 05:32:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2020-10-14 05:32:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-14 05:32:11,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:11,602 INFO L422 BasicCegarLoop]: trace histogram [50, 29, 21, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:11,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-14 05:32:11,602 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:11,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:11,602 INFO L82 PathProgramCache]: Analyzing trace with hash -380064406, now seen corresponding path program 56 times [2020-10-14 05:32:11,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:11,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368628013] [2020-10-14 05:32:11,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:11,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:11,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:15,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:16,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:16,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-14 05:32:16,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:32:16,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 05:32:16,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:16,614 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:16,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:32:16,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:16,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-14 05:32:16,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:16,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:16,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:16,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:16,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:16,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:16,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:16,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:16,900 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:16,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:16,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:16,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:16,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2545 backedges. 1630 proven. 45 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2020-10-14 05:32:16,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368628013] [2020-10-14 05:32:16,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:16,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:32:16,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933475608] [2020-10-14 05:32:16,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:32:16,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:16,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:32:16,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:32:16,918 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand 24 states. [2020-10-14 05:32:17,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:17,036 INFO L93 Difference]: Finished difference Result 590 states and 844 transitions. [2020-10-14 05:32:17,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:32:17,036 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 120 [2020-10-14 05:32:17,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:17,041 INFO L225 Difference]: With dead ends: 590 [2020-10-14 05:32:17,041 INFO L226 Difference]: Without dead ends: 585 [2020-10-14 05:32:17,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:32:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2020-10-14 05:32:17,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 123. [2020-10-14 05:32:17,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-14 05:32:17,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 145 transitions. [2020-10-14 05:32:17,057 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 145 transitions. Word has length 120 [2020-10-14 05:32:17,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:17,057 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 145 transitions. [2020-10-14 05:32:17,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:32:17,057 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2020-10-14 05:32:17,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-14 05:32:17,057 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:17,057 INFO L422 BasicCegarLoop]: trace histogram [50, 29, 21, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:17,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-14 05:32:17,058 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:17,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:17,058 INFO L82 PathProgramCache]: Analyzing trace with hash 967534314, now seen corresponding path program 57 times [2020-10-14 05:32:17,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:17,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872138045] [2020-10-14 05:32:17,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:17,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:17,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:21,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:22,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:22,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-14 05:32:22,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:32:22,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 05:32:22,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:22,075 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:22,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-14 05:32:22,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:22,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-14 05:32:22,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:22,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:22,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:22,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:22,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:22,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:22,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:22,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:22,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:22,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:22,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:22,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:22,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2566 backedges. 1230 proven. 870 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2020-10-14 05:32:22,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872138045] [2020-10-14 05:32:22,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:22,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-14 05:32:22,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517534008] [2020-10-14 05:32:22,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-14 05:32:22,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:22,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-14 05:32:22,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:32:22,565 INFO L87 Difference]: Start difference. First operand 123 states and 145 transitions. Second operand 32 states. [2020-10-14 05:32:22,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:22,687 INFO L93 Difference]: Finished difference Result 185 states and 230 transitions. [2020-10-14 05:32:22,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-14 05:32:22,688 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 122 [2020-10-14 05:32:22,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:22,689 INFO L225 Difference]: With dead ends: 185 [2020-10-14 05:32:22,690 INFO L226 Difference]: Without dead ends: 125 [2020-10-14 05:32:22,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-14 05:32:22,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-14 05:32:22,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-10-14 05:32:22,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-14 05:32:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 147 transitions. [2020-10-14 05:32:22,700 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 147 transitions. Word has length 122 [2020-10-14 05:32:22,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:22,700 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 147 transitions. [2020-10-14 05:32:22,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-14 05:32:22,701 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2020-10-14 05:32:22,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-14 05:32:22,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:22,701 INFO L422 BasicCegarLoop]: trace histogram [51, 30, 21, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:22,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-14 05:32:22,701 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:22,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:22,702 INFO L82 PathProgramCache]: Analyzing trace with hash 470866343, now seen corresponding path program 58 times [2020-10-14 05:32:22,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:22,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692984044] [2020-10-14 05:32:22,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:22,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:22,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:27,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:27,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:27,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-14 05:32:27,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:32:27,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:32:27,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:27,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:27,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-14 05:32:27,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:27,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-14 05:32:27,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:28,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:28,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:28,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:28,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:28,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:28,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:28,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:28,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:28,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:28,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:28,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:28,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 1271 proven. 930 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2020-10-14 05:32:28,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692984044] [2020-10-14 05:32:28,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:28,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-14 05:32:28,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044768243] [2020-10-14 05:32:28,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-14 05:32:28,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:28,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-14 05:32:28,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:32:28,249 INFO L87 Difference]: Start difference. First operand 125 states and 147 transitions. Second operand 33 states. [2020-10-14 05:32:28,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:28,394 INFO L93 Difference]: Finished difference Result 187 states and 232 transitions. [2020-10-14 05:32:28,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-14 05:32:28,396 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 124 [2020-10-14 05:32:28,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:28,397 INFO L225 Difference]: With dead ends: 187 [2020-10-14 05:32:28,398 INFO L226 Difference]: Without dead ends: 127 [2020-10-14 05:32:28,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-14 05:32:28,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-14 05:32:28,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-14 05:32:28,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-14 05:32:28,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 149 transitions. [2020-10-14 05:32:28,418 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 149 transitions. Word has length 124 [2020-10-14 05:32:28,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:28,419 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 149 transitions. [2020-10-14 05:32:28,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-14 05:32:28,419 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 149 transitions. [2020-10-14 05:32:28,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-14 05:32:28,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:28,420 INFO L422 BasicCegarLoop]: trace histogram [52, 31, 21, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:28,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-14 05:32:28,420 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:28,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:28,420 INFO L82 PathProgramCache]: Analyzing trace with hash -85683932, now seen corresponding path program 59 times [2020-10-14 05:32:28,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:28,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821353180] [2020-10-14 05:32:28,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:28,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:28,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:28,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:32,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:33,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:33,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-14 05:32:33,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:32:33,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:32:33,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:33,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:33,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-14 05:32:33,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 72 [2020-10-14 05:32:33,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-14 05:32:33,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:33,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:33,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:33,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:33,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:33,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:33,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:33,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:33,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:33,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:33,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:33,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:33,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:33,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2770 backedges. 1333 proven. 441 refuted. 0 times theorem prover too weak. 996 trivial. 0 not checked. [2020-10-14 05:32:33,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821353180] [2020-10-14 05:32:33,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:33,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-14 05:32:33,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082720007] [2020-10-14 05:32:33,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-14 05:32:33,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:33,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-14 05:32:33,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:32:33,723 INFO L87 Difference]: Start difference. First operand 127 states and 149 transitions. Second operand 24 states. [2020-10-14 05:32:33,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:33,843 INFO L93 Difference]: Finished difference Result 147 states and 172 transitions. [2020-10-14 05:32:33,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-14 05:32:33,844 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 126 [2020-10-14 05:32:33,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:33,845 INFO L225 Difference]: With dead ends: 147 [2020-10-14 05:32:33,845 INFO L226 Difference]: Without dead ends: 130 [2020-10-14 05:32:33,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-14 05:32:33,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-14 05:32:33,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-14 05:32:33,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-14 05:32:33,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 152 transitions. [2020-10-14 05:32:33,858 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 152 transitions. Word has length 126 [2020-10-14 05:32:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:33,859 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 152 transitions. [2020-10-14 05:32:33,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-14 05:32:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 152 transitions. [2020-10-14 05:32:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-14 05:32:33,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:33,860 INFO L422 BasicCegarLoop]: trace histogram [53, 31, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:33,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-14 05:32:33,860 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:33,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:33,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2142237727, now seen corresponding path program 60 times [2020-10-14 05:32:33,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:33,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107037223] [2020-10-14 05:32:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:33,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:33,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:38,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:38,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-14 05:32:38,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:38,876 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:32:38,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:38,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:38,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-14 05:32:38,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:38,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-14 05:32:38,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:39,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:39,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:39,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:39,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:39,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:39,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:39,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:39,429 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:39,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:39,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:39,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:39,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2875 backedges. 1376 proven. 992 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-10-14 05:32:39,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107037223] [2020-10-14 05:32:39,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:39,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-14 05:32:39,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354737582] [2020-10-14 05:32:39,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-14 05:32:39,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:39,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-14 05:32:39,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:32:39,444 INFO L87 Difference]: Start difference. First operand 129 states and 152 transitions. Second operand 34 states. [2020-10-14 05:32:39,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:39,578 INFO L93 Difference]: Finished difference Result 193 states and 240 transitions. [2020-10-14 05:32:39,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-14 05:32:39,580 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 128 [2020-10-14 05:32:39,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:39,581 INFO L225 Difference]: With dead ends: 193 [2020-10-14 05:32:39,581 INFO L226 Difference]: Without dead ends: 131 [2020-10-14 05:32:39,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-14 05:32:39,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-14 05:32:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-14 05:32:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-14 05:32:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 154 transitions. [2020-10-14 05:32:39,595 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 154 transitions. Word has length 128 [2020-10-14 05:32:39,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:39,596 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 154 transitions. [2020-10-14 05:32:39,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-14 05:32:39,596 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 154 transitions. [2020-10-14 05:32:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-14 05:32:39,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:39,597 INFO L422 BasicCegarLoop]: trace histogram [54, 32, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:39,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-14 05:32:39,597 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:39,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:39,598 INFO L82 PathProgramCache]: Analyzing trace with hash -693000932, now seen corresponding path program 61 times [2020-10-14 05:32:39,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:39,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169373320] [2020-10-14 05:32:39,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:39,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:39,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:44,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:44,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-14 05:32:44,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:44,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 05:32:44,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:44,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:44,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-14 05:32:44,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-14 05:32:44,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-14 05:32:44,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:44,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:44,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:44,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:44,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:44,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:44,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:32:44,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:44,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:44,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:44,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:44,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:44,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2982 backedges. 1440 proven. 484 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2020-10-14 05:32:44,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169373320] [2020-10-14 05:32:44,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:44,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-14 05:32:44,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811342455] [2020-10-14 05:32:44,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-14 05:32:44,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:44,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-14 05:32:44,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:32:44,928 INFO L87 Difference]: Start difference. First operand 131 states and 154 transitions. Second operand 25 states. [2020-10-14 05:32:45,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:45,057 INFO L93 Difference]: Finished difference Result 151 states and 177 transitions. [2020-10-14 05:32:45,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-14 05:32:45,058 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 130 [2020-10-14 05:32:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:45,060 INFO L225 Difference]: With dead ends: 151 [2020-10-14 05:32:45,060 INFO L226 Difference]: Without dead ends: 134 [2020-10-14 05:32:45,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-14 05:32:45,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-14 05:32:45,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-14 05:32:45,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-14 05:32:45,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 157 transitions. [2020-10-14 05:32:45,074 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 157 transitions. Word has length 130 [2020-10-14 05:32:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:45,074 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 157 transitions. [2020-10-14 05:32:45,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-14 05:32:45,074 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 157 transitions. [2020-10-14 05:32:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-14 05:32:45,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:45,075 INFO L422 BasicCegarLoop]: trace histogram [55, 32, 23, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:45,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-14 05:32:45,075 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:45,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:45,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1668814313, now seen corresponding path program 62 times [2020-10-14 05:32:45,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:45,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098668965] [2020-10-14 05:32:45,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:45,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:45,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:50,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:50,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-14 05:32:50,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:50,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:32:50,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:50,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:50,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-14 05:32:50,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:50,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-14 05:32:50,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:50,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:50,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:50,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:50,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:50,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:50,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:50,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:50,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:50,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:50,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:50,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:50,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3091 backedges. 1485 proven. 1056 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2020-10-14 05:32:50,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098668965] [2020-10-14 05:32:50,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:50,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-14 05:32:50,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792726853] [2020-10-14 05:32:50,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-14 05:32:50,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:50,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-14 05:32:50,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:32:50,679 INFO L87 Difference]: Start difference. First operand 133 states and 157 transitions. Second operand 35 states. [2020-10-14 05:32:50,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:50,787 INFO L93 Difference]: Finished difference Result 199 states and 248 transitions. [2020-10-14 05:32:50,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-14 05:32:50,788 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 132 [2020-10-14 05:32:50,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:50,789 INFO L225 Difference]: With dead ends: 199 [2020-10-14 05:32:50,790 INFO L226 Difference]: Without dead ends: 135 [2020-10-14 05:32:50,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-14 05:32:50,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-14 05:32:50,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-10-14 05:32:50,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-14 05:32:50,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 159 transitions. [2020-10-14 05:32:50,805 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 159 transitions. Word has length 132 [2020-10-14 05:32:50,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:50,805 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 159 transitions. [2020-10-14 05:32:50,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-14 05:32:50,805 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 159 transitions. [2020-10-14 05:32:50,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-14 05:32:50,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:50,806 INFO L422 BasicCegarLoop]: trace histogram [56, 33, 23, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:50,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-14 05:32:50,806 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:50,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:50,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1226757268, now seen corresponding path program 63 times [2020-10-14 05:32:50,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:50,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925258940] [2020-10-14 05:32:50,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:50,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:50,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:55,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:55,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-14 05:32:55,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:32:55,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:32:55,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:55,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:55,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-14 05:32:55,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:32:55,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-14 05:32:55,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:56,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:32:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:56,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:56,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:32:56,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:32:56,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:32:56,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:32:56,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:32:56,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:32:56,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:32:56,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:32:56,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:32:56,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:32:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3202 backedges. 1530 proven. 1122 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2020-10-14 05:32:56,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925258940] [2020-10-14 05:32:56,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:32:56,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-14 05:32:56,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381033979] [2020-10-14 05:32:56,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-14 05:32:56,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:32:56,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-14 05:32:56,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:32:56,440 INFO L87 Difference]: Start difference. First operand 135 states and 159 transitions. Second operand 36 states. [2020-10-14 05:32:56,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:32:56,578 INFO L93 Difference]: Finished difference Result 201 states and 250 transitions. [2020-10-14 05:32:56,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-14 05:32:56,580 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 134 [2020-10-14 05:32:56,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:32:56,581 INFO L225 Difference]: With dead ends: 201 [2020-10-14 05:32:56,581 INFO L226 Difference]: Without dead ends: 137 [2020-10-14 05:32:56,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-14 05:32:56,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-14 05:32:56,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-10-14 05:32:56,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-14 05:32:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 161 transitions. [2020-10-14 05:32:56,597 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 161 transitions. Word has length 134 [2020-10-14 05:32:56,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:32:56,597 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 161 transitions. [2020-10-14 05:32:56,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-14 05:32:56,597 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 161 transitions. [2020-10-14 05:32:56,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-14 05:32:56,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:32:56,598 INFO L422 BasicCegarLoop]: trace histogram [57, 34, 23, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:32:56,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-14 05:32:56,598 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:32:56,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:32:56,599 INFO L82 PathProgramCache]: Analyzing trace with hash 732238801, now seen corresponding path program 64 times [2020-10-14 05:32:56,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:32:56,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244372859] [2020-10-14 05:32:56,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:32:56,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:32:56,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:32:56,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:01,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:01,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-14 05:33:01,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:01,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:33:01,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:01,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-14 05:33:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-14 05:33:01,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-14 05:33:01,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:01,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:01,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:01,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:01,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:01,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:01,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:33:01,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:01,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:01,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:01,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:01,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:01,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 3315 backedges. 1598 proven. 529 refuted. 0 times theorem prover too weak. 1188 trivial. 0 not checked. [2020-10-14 05:33:01,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244372859] [2020-10-14 05:33:01,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:01,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-14 05:33:01,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317119453] [2020-10-14 05:33:01,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-14 05:33:01,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:01,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-14 05:33:01,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:33:01,961 INFO L87 Difference]: Start difference. First operand 137 states and 161 transitions. Second operand 26 states. [2020-10-14 05:33:02,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:02,101 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2020-10-14 05:33:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-14 05:33:02,101 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 136 [2020-10-14 05:33:02,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:02,103 INFO L225 Difference]: With dead ends: 157 [2020-10-14 05:33:02,103 INFO L226 Difference]: Without dead ends: 140 [2020-10-14 05:33:02,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-14 05:33:02,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-14 05:33:02,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-14 05:33:02,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-14 05:33:02,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 164 transitions. [2020-10-14 05:33:02,118 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 164 transitions. Word has length 136 [2020-10-14 05:33:02,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:02,119 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 164 transitions. [2020-10-14 05:33:02,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-14 05:33:02,119 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 164 transitions. [2020-10-14 05:33:02,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-14 05:33:02,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:02,120 INFO L422 BasicCegarLoop]: trace histogram [58, 34, 24, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:02,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-14 05:33:02,120 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:02,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:02,120 INFO L82 PathProgramCache]: Analyzing trace with hash -2107998324, now seen corresponding path program 65 times [2020-10-14 05:33:02,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:02,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423851524] [2020-10-14 05:33:02,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:02,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:02,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:07,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:07,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-14 05:33:07,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:07,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:33:07,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:07,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:07,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-14 05:33:07,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:33:07,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-14 05:33:07,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:07,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:07,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:07,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:07,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:07,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:07,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:33:07,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:07,783 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:07,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:07,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:07,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:07,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3430 backedges. 1645 proven. 1190 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2020-10-14 05:33:07,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423851524] [2020-10-14 05:33:07,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:07,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-14 05:33:07,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840517219] [2020-10-14 05:33:07,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-14 05:33:07,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:07,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-14 05:33:07,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:33:07,796 INFO L87 Difference]: Start difference. First operand 139 states and 164 transitions. Second operand 37 states. [2020-10-14 05:33:07,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:07,959 INFO L93 Difference]: Finished difference Result 207 states and 258 transitions. [2020-10-14 05:33:07,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-14 05:33:07,960 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 138 [2020-10-14 05:33:07,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:07,961 INFO L225 Difference]: With dead ends: 207 [2020-10-14 05:33:07,961 INFO L226 Difference]: Without dead ends: 141 [2020-10-14 05:33:07,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 05:33:07,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-14 05:33:07,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-10-14 05:33:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-14 05:33:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 166 transitions. [2020-10-14 05:33:07,976 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 166 transitions. Word has length 138 [2020-10-14 05:33:07,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:07,977 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 166 transitions. [2020-10-14 05:33:07,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-14 05:33:07,977 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 166 transitions. [2020-10-14 05:33:07,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-14 05:33:07,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:07,978 INFO L422 BasicCegarLoop]: trace histogram [59, 35, 24, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:07,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-14 05:33:07,978 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:07,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:07,979 INFO L82 PathProgramCache]: Analyzing trace with hash 755292233, now seen corresponding path program 66 times [2020-10-14 05:33:07,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:07,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056409622] [2020-10-14 05:33:07,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:07,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:08,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:08,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:12,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:12,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-14 05:33:13,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:13,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:33:13,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:13,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:13,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-14 05:33:13,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-14 05:33:13,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-14 05:33:13,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:13,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:13,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:13,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:13,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:13,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:13,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:33:13,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:13,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:13,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:13,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:13,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:13,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3547 backedges. 1715 proven. 576 refuted. 0 times theorem prover too weak. 1256 trivial. 0 not checked. [2020-10-14 05:33:13,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056409622] [2020-10-14 05:33:13,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:13,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-14 05:33:13,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466547086] [2020-10-14 05:33:13,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-14 05:33:13,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:13,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-14 05:33:13,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:33:13,366 INFO L87 Difference]: Start difference. First operand 141 states and 166 transitions. Second operand 27 states. [2020-10-14 05:33:13,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:13,505 INFO L93 Difference]: Finished difference Result 161 states and 189 transitions. [2020-10-14 05:33:13,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-14 05:33:13,506 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 140 [2020-10-14 05:33:13,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:13,507 INFO L225 Difference]: With dead ends: 161 [2020-10-14 05:33:13,507 INFO L226 Difference]: Without dead ends: 144 [2020-10-14 05:33:13,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-14 05:33:13,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-14 05:33:13,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-14 05:33:13,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-14 05:33:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 169 transitions. [2020-10-14 05:33:13,519 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 169 transitions. Word has length 140 [2020-10-14 05:33:13,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:13,519 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 169 transitions. [2020-10-14 05:33:13,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-14 05:33:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 169 transitions. [2020-10-14 05:33:13,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-14 05:33:13,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:13,520 INFO L422 BasicCegarLoop]: trace histogram [60, 35, 25, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:13,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-14 05:33:13,520 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:13,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:13,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1428486652, now seen corresponding path program 67 times [2020-10-14 05:33:13,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:13,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474097048] [2020-10-14 05:33:13,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:13,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:13,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:18,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:18,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-14 05:33:18,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:18,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:33:18,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:18,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:18,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 05:33:18,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:33:18,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-14 05:33:18,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:18,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:18,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:18,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:18,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:18,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:18,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:33:18,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:18,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:18,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:18,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:18,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:18,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3666 backedges. 2340 proven. 66 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2020-10-14 05:33:18,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474097048] [2020-10-14 05:33:18,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:18,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:33:18,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960135433] [2020-10-14 05:33:18,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:33:18,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:18,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:33:18,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:33:18,968 INFO L87 Difference]: Start difference. First operand 143 states and 169 transitions. Second operand 28 states. [2020-10-14 05:33:19,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:19,135 INFO L93 Difference]: Finished difference Result 800 states and 1152 transitions. [2020-10-14 05:33:19,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:33:19,136 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 142 [2020-10-14 05:33:19,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:19,140 INFO L225 Difference]: With dead ends: 800 [2020-10-14 05:33:19,140 INFO L226 Difference]: Without dead ends: 795 [2020-10-14 05:33:19,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:33:19,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2020-10-14 05:33:19,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 145. [2020-10-14 05:33:19,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-14 05:33:19,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 171 transitions. [2020-10-14 05:33:19,158 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 171 transitions. Word has length 142 [2020-10-14 05:33:19,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:19,158 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 171 transitions. [2020-10-14 05:33:19,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:33:19,159 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 171 transitions. [2020-10-14 05:33:19,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-14 05:33:19,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:19,159 INFO L422 BasicCegarLoop]: trace histogram [60, 35, 25, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:19,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-14 05:33:19,160 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:19,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:19,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1543896828, now seen corresponding path program 68 times [2020-10-14 05:33:19,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:19,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358908677] [2020-10-14 05:33:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:19,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:19,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:24,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:24,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-14 05:33:24,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:24,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 05:33:24,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:24,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:24,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-14 05:33:24,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:33:24,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-14 05:33:24,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:24,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:24,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:24,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:24,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:24,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:24,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:33:24,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:24,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:24,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:24,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:24,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:24,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3691 backedges. 1764 proven. 1260 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2020-10-14 05:33:24,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358908677] [2020-10-14 05:33:24,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:24,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-14 05:33:24,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742479255] [2020-10-14 05:33:24,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-14 05:33:24,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:24,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-14 05:33:24,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:33:24,881 INFO L87 Difference]: Start difference. First operand 145 states and 171 transitions. Second operand 38 states. [2020-10-14 05:33:25,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:25,049 INFO L93 Difference]: Finished difference Result 217 states and 270 transitions. [2020-10-14 05:33:25,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-14 05:33:25,050 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 144 [2020-10-14 05:33:25,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:25,051 INFO L225 Difference]: With dead ends: 217 [2020-10-14 05:33:25,052 INFO L226 Difference]: Without dead ends: 147 [2020-10-14 05:33:25,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-14 05:33:25,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-14 05:33:25,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-10-14 05:33:25,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-14 05:33:25,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 173 transitions. [2020-10-14 05:33:25,070 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 173 transitions. Word has length 144 [2020-10-14 05:33:25,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:25,070 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 173 transitions. [2020-10-14 05:33:25,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-14 05:33:25,071 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 173 transitions. [2020-10-14 05:33:25,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-14 05:33:25,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:25,072 INFO L422 BasicCegarLoop]: trace histogram [61, 36, 25, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:25,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-14 05:33:25,072 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:25,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:25,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1501304833, now seen corresponding path program 69 times [2020-10-14 05:33:25,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:25,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147235262] [2020-10-14 05:33:25,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:25,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:25,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:30,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:30,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-14 05:33:30,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:30,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 05:33:30,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:30,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:30,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-14 05:33:30,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 82 [2020-10-14 05:33:30,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 05:33:30,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:30,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:30,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:30,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:30,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:30,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:30,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:30,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:33:30,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:30,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:30,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:30,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:30,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:30,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3812 backedges. 1836 proven. 625 refuted. 0 times theorem prover too weak. 1351 trivial. 0 not checked. [2020-10-14 05:33:30,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147235262] [2020-10-14 05:33:30,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:30,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-14 05:33:30,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853398702] [2020-10-14 05:33:30,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-14 05:33:30,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:30,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-14 05:33:30,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:33:30,483 INFO L87 Difference]: Start difference. First operand 147 states and 173 transitions. Second operand 28 states. [2020-10-14 05:33:30,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:30,651 INFO L93 Difference]: Finished difference Result 169 states and 198 transitions. [2020-10-14 05:33:30,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-14 05:33:30,652 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 146 [2020-10-14 05:33:30,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:30,653 INFO L225 Difference]: With dead ends: 169 [2020-10-14 05:33:30,653 INFO L226 Difference]: Without dead ends: 150 [2020-10-14 05:33:30,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-14 05:33:30,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-14 05:33:30,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-14 05:33:30,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-14 05:33:30,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 176 transitions. [2020-10-14 05:33:30,671 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 176 transitions. Word has length 146 [2020-10-14 05:33:30,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:30,671 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 176 transitions. [2020-10-14 05:33:30,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-14 05:33:30,672 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 176 transitions. [2020-10-14 05:33:30,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-14 05:33:30,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:30,673 INFO L422 BasicCegarLoop]: trace histogram [62, 36, 26, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:30,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-14 05:33:30,673 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:30,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:30,673 INFO L82 PathProgramCache]: Analyzing trace with hash 680862972, now seen corresponding path program 70 times [2020-10-14 05:33:30,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:30,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947991525] [2020-10-14 05:33:30,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:30,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:30,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:35,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:35,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-14 05:33:35,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:35,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 05:33:35,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:35,689 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:35,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-14 05:33:35,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:33:35,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-14 05:33:35,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:36,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:36,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:36,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:36,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:36,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:36,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:33:36,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:36,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:36,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:36,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:36,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:36,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3935 backedges. 1887 proven. 1332 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2020-10-14 05:33:36,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947991525] [2020-10-14 05:33:36,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:36,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-14 05:33:36,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027986395] [2020-10-14 05:33:36,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-14 05:33:36,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:36,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-14 05:33:36,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:33:36,425 INFO L87 Difference]: Start difference. First operand 149 states and 176 transitions. Second operand 39 states. [2020-10-14 05:33:36,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:36,593 INFO L93 Difference]: Finished difference Result 223 states and 278 transitions. [2020-10-14 05:33:36,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-14 05:33:36,593 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 148 [2020-10-14 05:33:36,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:36,595 INFO L225 Difference]: With dead ends: 223 [2020-10-14 05:33:36,595 INFO L226 Difference]: Without dead ends: 151 [2020-10-14 05:33:36,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-14 05:33:36,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-14 05:33:36,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-14 05:33:36,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-14 05:33:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 178 transitions. [2020-10-14 05:33:36,610 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 178 transitions. Word has length 148 [2020-10-14 05:33:36,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:36,610 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 178 transitions. [2020-10-14 05:33:36,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-14 05:33:36,610 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 178 transitions. [2020-10-14 05:33:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-14 05:33:36,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:36,611 INFO L422 BasicCegarLoop]: trace histogram [63, 37, 26, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:36,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-14 05:33:36,612 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:36,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:36,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1861651079, now seen corresponding path program 71 times [2020-10-14 05:33:36,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:36,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456238819] [2020-10-14 05:33:36,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:36,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:36,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:41,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:41,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-14 05:33:41,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:41,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 05:33:41,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:41,629 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-14 05:33:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:33:41,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-14 05:33:41,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:42,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:42,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:42,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:42,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:42,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:42,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:33:42,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:42,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:42,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:42,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:42,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:42,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4060 backedges. 1938 proven. 1406 refuted. 0 times theorem prover too weak. 716 trivial. 0 not checked. [2020-10-14 05:33:42,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456238819] [2020-10-14 05:33:42,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:42,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-14 05:33:42,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730622339] [2020-10-14 05:33:42,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-14 05:33:42,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:42,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-14 05:33:42,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 05:33:42,414 INFO L87 Difference]: Start difference. First operand 151 states and 178 transitions. Second operand 40 states. [2020-10-14 05:33:42,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:42,594 INFO L93 Difference]: Finished difference Result 225 states and 280 transitions. [2020-10-14 05:33:42,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-14 05:33:42,595 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2020-10-14 05:33:42,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:42,596 INFO L225 Difference]: With dead ends: 225 [2020-10-14 05:33:42,596 INFO L226 Difference]: Without dead ends: 153 [2020-10-14 05:33:42,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-14 05:33:42,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-14 05:33:42,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2020-10-14 05:33:42,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-14 05:33:42,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 180 transitions. [2020-10-14 05:33:42,614 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 180 transitions. Word has length 150 [2020-10-14 05:33:42,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:42,615 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 180 transitions. [2020-10-14 05:33:42,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-14 05:33:42,615 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 180 transitions. [2020-10-14 05:33:42,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-14 05:33:42,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:42,616 INFO L422 BasicCegarLoop]: trace histogram [64, 38, 26, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:42,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-14 05:33:42,616 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:42,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1381262666, now seen corresponding path program 72 times [2020-10-14 05:33:42,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:42,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017188312] [2020-10-14 05:33:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:42,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:42,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:47,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:47,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-14 05:33:47,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:47,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 05:33:47,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:47,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:47,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-14 05:33:47,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-14 05:33:47,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 05:33:47,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:48,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:48,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:48,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:48,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:48,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:48,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-14 05:33:48,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:48,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:48,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:48,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:48,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:48,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 2014 proven. 676 refuted. 0 times theorem prover too weak. 1497 trivial. 0 not checked. [2020-10-14 05:33:48,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017188312] [2020-10-14 05:33:48,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:48,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-14 05:33:48,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570881589] [2020-10-14 05:33:48,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-14 05:33:48,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:48,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-14 05:33:48,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:33:48,055 INFO L87 Difference]: Start difference. First operand 153 states and 180 transitions. Second operand 29 states. [2020-10-14 05:33:48,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:48,241 INFO L93 Difference]: Finished difference Result 175 states and 205 transitions. [2020-10-14 05:33:48,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-14 05:33:48,242 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 152 [2020-10-14 05:33:48,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:48,243 INFO L225 Difference]: With dead ends: 175 [2020-10-14 05:33:48,243 INFO L226 Difference]: Without dead ends: 156 [2020-10-14 05:33:48,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-14 05:33:48,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-14 05:33:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-10-14 05:33:48,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-14 05:33:48,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 183 transitions. [2020-10-14 05:33:48,269 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 183 transitions. Word has length 152 [2020-10-14 05:33:48,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:48,270 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 183 transitions. [2020-10-14 05:33:48,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-14 05:33:48,270 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 183 transitions. [2020-10-14 05:33:48,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-14 05:33:48,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:48,271 INFO L422 BasicCegarLoop]: trace histogram [65, 38, 27, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:48,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-14 05:33:48,271 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:48,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:48,271 INFO L82 PathProgramCache]: Analyzing trace with hash 787402353, now seen corresponding path program 73 times [2020-10-14 05:33:48,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:48,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44698707] [2020-10-14 05:33:48,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:48,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:48,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:48,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:53,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:53,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-14 05:33:53,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:33:53,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 05:33:53,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:53,294 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:53,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-14 05:33:53,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:33:53,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-14 05:33:53,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:54,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:33:54,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:54,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:54,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:33:54,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:33:54,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:33:54,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:33:54,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:33:54,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:33:54,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:33:54,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:33:54,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:33:54,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 05:33:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4316 backedges. 2067 proven. 1482 refuted. 0 times theorem prover too weak. 767 trivial. 0 not checked. [2020-10-14 05:33:54,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44698707] [2020-10-14 05:33:54,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:33:54,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-14 05:33:54,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115519625] [2020-10-14 05:33:54,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-14 05:33:54,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:33:54,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-14 05:33:54,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:33:54,121 INFO L87 Difference]: Start difference. First operand 155 states and 183 transitions. Second operand 41 states. [2020-10-14 05:33:54,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:33:54,298 INFO L93 Difference]: Finished difference Result 231 states and 288 transitions. [2020-10-14 05:33:54,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-14 05:33:54,299 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 154 [2020-10-14 05:33:54,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:33:54,300 INFO L225 Difference]: With dead ends: 231 [2020-10-14 05:33:54,300 INFO L226 Difference]: Without dead ends: 157 [2020-10-14 05:33:54,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-14 05:33:54,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-14 05:33:54,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-10-14 05:33:54,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-14 05:33:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 185 transitions. [2020-10-14 05:33:54,316 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 185 transitions. Word has length 154 [2020-10-14 05:33:54,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:33:54,316 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 185 transitions. [2020-10-14 05:33:54,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-14 05:33:54,316 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 185 transitions. [2020-10-14 05:33:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-14 05:33:54,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:33:54,317 INFO L422 BasicCegarLoop]: trace histogram [66, 39, 27, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:33:54,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-14 05:33:54,317 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:33:54,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:33:54,318 INFO L82 PathProgramCache]: Analyzing trace with hash 928124206, now seen corresponding path program 74 times [2020-10-14 05:33:54,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:33:54,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897991896] [2020-10-14 05:33:54,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:33:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:33:54,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:33:54,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking...