/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=NARROWEST --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/array-crafted/zero_sum_const_m4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:38:04,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:38:04,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:38:04,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:38:04,694 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:38:04,703 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:38:04,705 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:38:04,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:38:04,712 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:38:04,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:38:04,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:38:04,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:38:04,719 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:38:04,722 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:38:04,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:38:04,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:38:04,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:38:04,728 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:38:04,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:38:04,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:38:04,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:38:04,743 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:38:04,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:38:04,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:38:04,757 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:38:04,762 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:38:04,762 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:38:04,763 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:38:04,764 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:38:04,765 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:38:04,765 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:38:04,766 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:38:04,766 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:38:04,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:38:04,768 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:38:04,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:38:04,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:38:04,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:38:04,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:38:04,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:38:04,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:38:04,771 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 [2020-10-13 04:38:04,793 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:38:04,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:38:04,794 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:38:04,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:38:04,795 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:38:04,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:38:04,795 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:38:04,795 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:38:04,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:38:04,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:38:04,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:38:04,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:38:04,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:38:04,796 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:38:04,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:38:04,797 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:38:04,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:38:04,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:38:04,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:38:04,797 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:38:04,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:38:04,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:38:04,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:38:04,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:38:04,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:38:04,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:38:04,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:38:04,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:38:04,799 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:38:04,799 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 04:38:05,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:38:05,137 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:38:05,141 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:38:05,145 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:38:05,147 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:38:05,148 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m4.c [2020-10-13 04:38:05,217 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b5fc3fa1/e31a6ae6bfb5423e8e7b5ce112fb2741/FLAG23001ffca [2020-10-13 04:38:05,710 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:38:05,711 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const_m4.c [2020-10-13 04:38:05,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b5fc3fa1/e31a6ae6bfb5423e8e7b5ce112fb2741/FLAG23001ffca [2020-10-13 04:38:06,021 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9b5fc3fa1/e31a6ae6bfb5423e8e7b5ce112fb2741 [2020-10-13 04:38:06,033 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:38:06,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:38:06,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:06,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:38:06,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:38:06,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:06" (1/1) ... [2020-10-13 04:38:06,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@431c6f83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06, skipping insertion in model container [2020-10-13 04:38:06,045 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:06" (1/1) ... [2020-10-13 04:38:06,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:38:06,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:38:06,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:06,270 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:38:06,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:06,310 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:38:06,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06 WrapperNode [2020-10-13 04:38:06,310 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:06,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:38:06,311 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:38:06,311 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:38:06,420 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (1/1) ... [2020-10-13 04:38:06,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (1/1) ... [2020-10-13 04:38:06,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (1/1) ... [2020-10-13 04:38:06,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (1/1) ... [2020-10-13 04:38:06,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (1/1) ... [2020-10-13 04:38:06,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (1/1) ... [2020-10-13 04:38:06,451 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (1/1) ... [2020-10-13 04:38:06,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:38:06,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:38:06,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:38:06,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:38:06,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (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 [2020-10-13 04:38:06,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:38:06,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:38:06,525 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 04:38:06,525 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:38:06,525 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:38:06,525 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:38:06,525 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 04:38:06,525 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 04:38:06,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:38:06,526 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-13 04:38:06,526 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 04:38:06,526 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:38:06,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 04:38:06,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:38:06,527 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:38:06,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:38:06,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:38:06,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:38:06,881 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:38:06,881 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-13 04:38:06,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:06 BoogieIcfgContainer [2020-10-13 04:38:06,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:38:06,889 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:38:06,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:38:06,893 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:38:06,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:38:06" (1/3) ... [2020-10-13 04:38:06,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15540687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:06, skipping insertion in model container [2020-10-13 04:38:06,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:06" (2/3) ... [2020-10-13 04:38:06,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15540687 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:06, skipping insertion in model container [2020-10-13 04:38:06,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:06" (3/3) ... [2020-10-13 04:38:06,897 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const_m4.c [2020-10-13 04:38:06,910 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:38:06,919 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:38:06,936 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:38:06,965 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:38:06,966 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:38:06,966 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:38:06,966 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:38:06,966 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:38:06,966 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:38:06,967 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:38:06,967 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:38:06,989 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-13 04:38:06,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:38:06,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:07,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:07,000 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:07,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:07,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1109148347, now seen corresponding path program 1 times [2020-10-13 04:38:07,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:07,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573543617] [2020-10-13 04:38:07,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:07,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:07,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:08,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:09,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:10,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:10,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:38:10,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 04:38:10,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3336 [2020-10-13 04:38:10,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:10,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:10,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 04:38:10,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:10,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:38:10,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:10,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:10,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:10,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:10,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:10,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 04:38:10,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:10,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:10,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:10,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:10,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:38:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:10,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573543617] [2020-10-13 04:38:10,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:10,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:38:10,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275530500] [2020-10-13 04:38:10,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:38:10,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:10,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:38:10,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:38:10,634 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2020-10-13 04:38:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:10,856 INFO L93 Difference]: Finished difference Result 81 states and 117 transitions. [2020-10-13 04:38:10,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:38:10,859 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-10-13 04:38:10,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:10,879 INFO L225 Difference]: With dead ends: 81 [2020-10-13 04:38:10,879 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 04:38:10,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:38:10,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 04:38:10,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-13 04:38:10,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 04:38:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-10-13 04:38:10,969 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 28 [2020-10-13 04:38:10,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:10,970 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-10-13 04:38:10,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:38:10,971 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-10-13 04:38:10,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 04:38:10,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:10,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:10,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:38:10,980 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:10,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:10,981 INFO L82 PathProgramCache]: Analyzing trace with hash -322584269, now seen corresponding path program 1 times [2020-10-13 04:38:10,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:10,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404439020] [2020-10-13 04:38:10,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:11,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:11,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:11,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:11,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:11,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:11,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:11,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:11,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:12,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:16,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:16,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 04:38:16,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:38:16,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:38:16,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:16,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:38:16,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:16,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:38:16,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 04:38:16,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:16,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:16,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:16,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:16,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:16,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 04:38:16,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:16,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:16,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:16,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:16,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:16,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:16,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404439020] [2020-10-13 04:38:16,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:16,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:38:16,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161557787] [2020-10-13 04:38:16,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:38:16,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:16,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:38:16,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:38:16,087 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 4 states. [2020-10-13 04:38:16,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:16,262 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2020-10-13 04:38:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:38:16,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-13 04:38:16,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:16,264 INFO L225 Difference]: With dead ends: 69 [2020-10-13 04:38:16,265 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 04:38:16,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:38:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 04:38:16,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-13 04:38:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-13 04:38:16,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-10-13 04:38:16,275 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 28 [2020-10-13 04:38:16,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:16,275 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-10-13 04:38:16,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:38:16,276 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-10-13 04:38:16,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 04:38:16,277 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:16,277 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:16,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:38:16,278 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:16,278 INFO L82 PathProgramCache]: Analyzing trace with hash 171629905, now seen corresponding path program 1 times [2020-10-13 04:38:16,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:16,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932529261] [2020-10-13 04:38:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:16,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:16,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:16,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:16,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:16,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:16,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:16,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:16,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:16,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:21,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 04:38:21,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:38:21,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:38:21,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:21,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:38:21,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:21,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:38:21,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:21,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:21,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:21,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:21,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:21,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:38:21,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:21,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:21,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:21,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:21,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:21,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932529261] [2020-10-13 04:38:21,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:21,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:38:21,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711935873] [2020-10-13 04:38:21,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:38:21,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:21,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:38:21,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:21,356 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 5 states. [2020-10-13 04:38:21,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:21,580 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2020-10-13 04:38:21,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:38:21,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-10-13 04:38:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:21,582 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:38:21,582 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:38:21,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:21,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:38:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 04:38:21,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 04:38:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2020-10-13 04:38:21,596 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 30 [2020-10-13 04:38:21,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:21,596 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2020-10-13 04:38:21,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:38:21,597 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2020-10-13 04:38:21,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:38:21,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:21,599 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:21,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:38:21,600 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:21,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:21,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1629918737, now seen corresponding path program 2 times [2020-10-13 04:38:21,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:21,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836474424] [2020-10-13 04:38:21,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:21,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:21,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:22,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:23,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:26,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:38:26,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 04:38:26,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:38:26,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:26,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:38:26,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:26,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:38:26,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:26,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:26,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:26,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:26,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:26,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:26,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:26,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:26,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:26,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:26,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:26,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:38:26,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836474424] [2020-10-13 04:38:26,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:26,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 04:38:26,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569984078] [2020-10-13 04:38:26,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:38:26,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:26,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:38:26,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:26,669 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 5 states. [2020-10-13 04:38:26,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:26,855 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2020-10-13 04:38:26,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:38:26,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-10-13 04:38:26,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:26,857 INFO L225 Difference]: With dead ends: 83 [2020-10-13 04:38:26,857 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:38:26,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:38:26,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:38:26,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2020-10-13 04:38:26,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 04:38:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-13 04:38:26,867 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 32 [2020-10-13 04:38:26,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:26,867 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-13 04:38:26,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:38:26,867 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-13 04:38:26,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 04:38:26,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:26,869 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:26,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:38:26,869 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:26,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:26,870 INFO L82 PathProgramCache]: Analyzing trace with hash -223455265, now seen corresponding path program 1 times [2020-10-13 04:38:26,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:26,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813142829] [2020-10-13 04:38:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:26,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:26,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:27,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:31,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:31,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 04:38:31,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 04:38:31,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:38:31,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:31,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:38:31,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:31,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:38:31,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:31,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:31,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:31,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:31,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:31,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:31,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:31,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:31,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:31,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:31,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:31,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:31,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:31,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 04:38:31,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813142829] [2020-10-13 04:38:31,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:31,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:38:31,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304424219] [2020-10-13 04:38:31,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:38:31,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:31,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:38:31,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:38:31,975 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 6 states. [2020-10-13 04:38:32,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:32,252 INFO L93 Difference]: Finished difference Result 98 states and 120 transitions. [2020-10-13 04:38:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:38:32,253 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-10-13 04:38:32,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:32,254 INFO L225 Difference]: With dead ends: 98 [2020-10-13 04:38:32,254 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 04:38:32,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:38:32,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 04:38:32,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-13 04:38:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-13 04:38:32,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-10-13 04:38:32,269 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 48 [2020-10-13 04:38:32,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:32,270 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-10-13 04:38:32,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:38:32,270 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-10-13 04:38:32,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 04:38:32,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:32,280 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:32,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:38:32,281 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:32,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:32,283 INFO L82 PathProgramCache]: Analyzing trace with hash -541579825, now seen corresponding path program 2 times [2020-10-13 04:38:32,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:32,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921052009] [2020-10-13 04:38:32,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:32,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:33,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:33,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:35,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:35,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:37,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:37,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:37,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 04:38:37,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:38:37,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5282 [2020-10-13 04:38:37,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:37,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 04:38:37,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:37,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 04:38:37,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:40,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:40,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:40,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:40,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:40,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:40,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:38:40,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:40,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:40,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:40,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:40,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:40,740 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:40,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921052009] [2020-10-13 04:38:40,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:40,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:38:40,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810610852] [2020-10-13 04:38:40,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:38:40,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:40,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:38:40,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1488, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:38:40,744 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 41 states. [2020-10-13 04:38:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:45,313 INFO L93 Difference]: Finished difference Result 151 states and 172 transitions. [2020-10-13 04:38:45,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-13 04:38:45,314 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 64 [2020-10-13 04:38:45,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:45,316 INFO L225 Difference]: With dead ends: 151 [2020-10-13 04:38:45,316 INFO L226 Difference]: Without dead ends: 146 [2020-10-13 04:38:45,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=363, Invalid=4467, Unknown=0, NotChecked=0, Total=4830 [2020-10-13 04:38:45,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-13 04:38:45,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 112. [2020-10-13 04:38:45,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:38:45,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 128 transitions. [2020-10-13 04:38:45,334 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 128 transitions. Word has length 64 [2020-10-13 04:38:45,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:45,335 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 128 transitions. [2020-10-13 04:38:45,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:38:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 128 transitions. [2020-10-13 04:38:45,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:38:45,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:45,337 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:45,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:38:45,337 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:45,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:45,337 INFO L82 PathProgramCache]: Analyzing trace with hash -2090829139, now seen corresponding path program 3 times [2020-10-13 04:38:45,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:45,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [497325337] [2020-10-13 04:38:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:45,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:45,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:45,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:45,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:45,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:45,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:45,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:50,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:50,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:38:50,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:38:50,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:38:50,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:50,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:38:50,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:50,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:38:50,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:50,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:50,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:50,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:50,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:50,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:50,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:38:50,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:50,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:50,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:50,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:50,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:50,449 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 04:38:50,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [497325337] [2020-10-13 04:38:50,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:50,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:38:50,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55459890] [2020-10-13 04:38:50,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:38:50,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:50,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:38:50,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:38:50,454 INFO L87 Difference]: Start difference. First operand 112 states and 128 transitions. Second operand 10 states. [2020-10-13 04:38:50,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:50,987 INFO L93 Difference]: Finished difference Result 236 states and 273 transitions. [2020-10-13 04:38:50,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:38:50,988 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-13 04:38:50,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:50,990 INFO L225 Difference]: With dead ends: 236 [2020-10-13 04:38:50,990 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 04:38:50,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:38:50,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 04:38:51,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 123. [2020-10-13 04:38:51,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-13 04:38:51,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 138 transitions. [2020-10-13 04:38:51,008 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 138 transitions. Word has length 66 [2020-10-13 04:38:51,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:51,008 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 138 transitions. [2020-10-13 04:38:51,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:38:51,009 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 138 transitions. [2020-10-13 04:38:51,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:38:51,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:51,010 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:51,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:38:51,010 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:51,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:51,010 INFO L82 PathProgramCache]: Analyzing trace with hash -814085395, now seen corresponding path program 4 times [2020-10-13 04:38:51,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:51,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315861738] [2020-10-13 04:38:51,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:51,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:51,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:51,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:51,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:51,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:51,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:56,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:56,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:38:56,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:38:56,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:38:56,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:56,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:38:56,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:38:56,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:38:56,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:56,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:56,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:56,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:56,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:56,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:56,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:56,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:56,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:56,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:56,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:56,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:56,136 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 04:38:56,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315861738] [2020-10-13 04:38:56,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:56,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:38:56,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504346763] [2020-10-13 04:38:56,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:38:56,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:56,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:38:56,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:38:56,138 INFO L87 Difference]: Start difference. First operand 123 states and 138 transitions. Second operand 10 states. [2020-10-13 04:38:56,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:56,678 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2020-10-13 04:38:56,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:38:56,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-13 04:38:56,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:56,680 INFO L225 Difference]: With dead ends: 130 [2020-10-13 04:38:56,680 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 04:38:56,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:38:56,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 04:38:56,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-13 04:38:56,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 04:38:56,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2020-10-13 04:38:56,692 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 66 [2020-10-13 04:38:56,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:56,693 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2020-10-13 04:38:56,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:38:56,693 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2020-10-13 04:38:56,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 04:38:56,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:56,694 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:56,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:38:56,694 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:56,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:56,695 INFO L82 PathProgramCache]: Analyzing trace with hash 79084765, now seen corresponding path program 5 times [2020-10-13 04:38:56,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:56,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552601864] [2020-10-13 04:38:56,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:56,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:56,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:57,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:58,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:00,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:01,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:01,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:01,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 04:39:01,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:39:01,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5196 [2020-10-13 04:39:01,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:01,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-13 04:39:01,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:01,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 04:39:01,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:07,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:07,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:07,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:07,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:07,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:07,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:07,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:07,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:07,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:07,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:07,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:07,576 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 8 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:39:07,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552601864] [2020-10-13 04:39:07,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:07,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-13 04:39:07,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141510946] [2020-10-13 04:39:07,578 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-13 04:39:07,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:07,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-13 04:39:07,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2993, Unknown=0, NotChecked=0, Total=3306 [2020-10-13 04:39:07,580 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand 58 states. [2020-10-13 04:39:07,906 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 63 [2020-10-13 04:39:08,337 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 55 [2020-10-13 04:39:09,293 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 75 [2020-10-13 04:39:09,538 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 58 [2020-10-13 04:39:09,826 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 41 [2020-10-13 04:39:10,102 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 42 [2020-10-13 04:39:10,449 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2020-10-13 04:39:11,000 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-13 04:39:11,398 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-10-13 04:39:12,302 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2020-10-13 04:39:12,642 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 65 [2020-10-13 04:39:12,946 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 73 [2020-10-13 04:39:13,314 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 67 [2020-10-13 04:39:14,396 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 88 [2020-10-13 04:39:15,038 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 80 [2020-10-13 04:39:15,553 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 87 [2020-10-13 04:39:15,990 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2020-10-13 04:39:16,462 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 82 [2020-10-13 04:39:16,772 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 58 [2020-10-13 04:39:17,213 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 76 [2020-10-13 04:39:17,684 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 70 [2020-10-13 04:39:18,140 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2020-10-13 04:39:18,672 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-13 04:39:19,159 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-13 04:39:20,192 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 78 [2020-10-13 04:39:20,873 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 60 [2020-10-13 04:39:21,500 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2020-10-13 04:39:21,940 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2020-10-13 04:39:22,460 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 60 [2020-10-13 04:39:23,080 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 58 [2020-10-13 04:39:23,343 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2020-10-13 04:39:24,167 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 70 [2020-10-13 04:39:24,539 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 62 [2020-10-13 04:39:24,941 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 54 [2020-10-13 04:39:25,535 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2020-10-13 04:39:26,110 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2020-10-13 04:39:26,447 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-13 04:39:26,864 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2020-10-13 04:39:27,295 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-13 04:39:27,733 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-10-13 04:39:28,260 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 64 [2020-10-13 04:39:28,727 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 69 [2020-10-13 04:39:29,210 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 62 [2020-10-13 04:39:29,626 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 53 [2020-10-13 04:39:30,464 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 82 [2020-10-13 04:39:31,003 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 76 [2020-10-13 04:39:31,333 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 56 [2020-10-13 04:39:31,838 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-13 04:39:32,232 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2020-10-13 04:39:32,659 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 58 [2020-10-13 04:39:33,029 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 55 [2020-10-13 04:39:33,415 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2020-10-13 04:39:33,816 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 63 [2020-10-13 04:39:34,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:34,552 INFO L93 Difference]: Finished difference Result 266 states and 300 transitions. [2020-10-13 04:39:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-10-13 04:39:34,554 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 82 [2020-10-13 04:39:34,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:34,556 INFO L225 Difference]: With dead ends: 266 [2020-10-13 04:39:34,556 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 04:39:34,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4923 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=2282, Invalid=16078, Unknown=0, NotChecked=0, Total=18360 [2020-10-13 04:39:34,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 04:39:34,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2020-10-13 04:39:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:39:34,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2020-10-13 04:39:34,580 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 82 [2020-10-13 04:39:34,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:34,580 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2020-10-13 04:39:34,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-13 04:39:34,581 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2020-10-13 04:39:34,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 04:39:34,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:34,582 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:34,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:39:34,582 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:34,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:34,583 INFO L82 PathProgramCache]: Analyzing trace with hash -73198213, now seen corresponding path program 6 times [2020-10-13 04:39:34,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:34,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010434769] [2020-10-13 04:39:34,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:34,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:34,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:34,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:34,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:34,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:36,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:39,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:39,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 04:39:39,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:39:39,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:39:39,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:39,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:39:39,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 04:39:39,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:39:39,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:39,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:39,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:39,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:39,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:39,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:39,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:39:39,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:39,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:39,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:39,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:39,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:39:39,791 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-13 04:39:39,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010434769] [2020-10-13 04:39:39,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:39,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:39:39,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025279566] [2020-10-13 04:39:39,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:39:39,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:39,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:39:39,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:39:39,796 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand 12 states. [2020-10-13 04:39:40,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:40,623 INFO L93 Difference]: Finished difference Result 258 states and 288 transitions. [2020-10-13 04:39:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:39:40,625 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 84 [2020-10-13 04:39:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:40,626 INFO L225 Difference]: With dead ends: 258 [2020-10-13 04:39:40,627 INFO L226 Difference]: Without dead ends: 171 [2020-10-13 04:39:40,628 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:39:40,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-13 04:39:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 155. [2020-10-13 04:39:40,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-13 04:39:40,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 170 transitions. [2020-10-13 04:39:40,645 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 170 transitions. Word has length 84 [2020-10-13 04:39:40,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:40,645 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 170 transitions. [2020-10-13 04:39:40,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:39:40,645 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 170 transitions. [2020-10-13 04:39:40,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 04:39:40,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:40,647 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:40,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:39:40,647 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:40,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:40,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1772148347, now seen corresponding path program 7 times [2020-10-13 04:39:40,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:40,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60186848] [2020-10-13 04:39:40,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:40,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:40,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:40,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:40,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:40,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:40,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:45,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:45,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:45,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 04:39:45,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 04:39:45,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 04:39:45,660 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:45,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:39:45,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:45,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:39:45,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:45,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:45,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:45,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:45,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:45,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:45,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:39:45,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:45,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:45,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:45,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:45,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:39:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-13 04:39:45,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60186848] [2020-10-13 04:39:45,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:45,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:39:45,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652471819] [2020-10-13 04:39:45,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:39:45,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:45,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:39:45,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:39:45,812 INFO L87 Difference]: Start difference. First operand 155 states and 170 transitions. Second operand 12 states. [2020-10-13 04:39:46,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:46,708 INFO L93 Difference]: Finished difference Result 162 states and 177 transitions. [2020-10-13 04:39:46,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:39:46,710 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 84 [2020-10-13 04:39:46,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:46,711 INFO L225 Difference]: With dead ends: 162 [2020-10-13 04:39:46,712 INFO L226 Difference]: Without dead ends: 101 [2020-10-13 04:39:46,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:39:46,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-13 04:39:46,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-13 04:39:46,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 04:39:46,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2020-10-13 04:39:46,722 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 84 [2020-10-13 04:39:46,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:46,723 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2020-10-13 04:39:46,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:39:46,723 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2020-10-13 04:39:46,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 04:39:46,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:46,724 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:46,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:39:46,724 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:46,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:46,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1175415915, now seen corresponding path program 8 times [2020-10-13 04:39:46,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:46,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996464714] [2020-10-13 04:39:46,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:46,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:48,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:50,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:51,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:51,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 04:39:51,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:39:51,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:39:51,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-13 04:39:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:39:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-13 04:39:51,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:02,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:02,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:02,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:02,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:02,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:02,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:02,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:02,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:02,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:02,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:02,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:40:02,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996464714] [2020-10-13 04:40:02,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:02,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-13 04:40:02,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927155925] [2020-10-13 04:40:02,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-13 04:40:02,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:02,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-13 04:40:02,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=5494, Unknown=0, NotChecked=0, Total=5700 [2020-10-13 04:40:02,374 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand 76 states. [2020-10-13 04:40:17,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:17,453 INFO L93 Difference]: Finished difference Result 191 states and 207 transitions. [2020-10-13 04:40:17,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-13 04:40:17,455 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 100 [2020-10-13 04:40:17,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:17,457 INFO L225 Difference]: With dead ends: 191 [2020-10-13 04:40:17,457 INFO L226 Difference]: Without dead ends: 186 [2020-10-13 04:40:17,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1762 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=403, Invalid=12253, Unknown=0, NotChecked=0, Total=12656 [2020-10-13 04:40:17,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-13 04:40:17,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 176. [2020-10-13 04:40:17,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 04:40:17,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 192 transitions. [2020-10-13 04:40:17,482 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 192 transitions. Word has length 100 [2020-10-13 04:40:17,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:17,482 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 192 transitions. [2020-10-13 04:40:17,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-13 04:40:17,482 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 192 transitions. [2020-10-13 04:40:17,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 04:40:17,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:17,484 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:17,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:40:17,484 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:17,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:17,485 INFO L82 PathProgramCache]: Analyzing trace with hash 526715465, now seen corresponding path program 9 times [2020-10-13 04:40:17,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:17,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787600963] [2020-10-13 04:40:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:17,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:17,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:17,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:17,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:17,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:17,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:22,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:22,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 04:40:22,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:40:22,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:40:22,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:22,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:40:22,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:40:22,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:40:22,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:22,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:22,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:22,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:22,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:22,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:22,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:40:22,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:22,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:22,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:22,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:22,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:40:22,794 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-13 04:40:22,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787600963] [2020-10-13 04:40:22,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:22,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:40:22,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317358108] [2020-10-13 04:40:22,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:40:22,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:22,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:40:22,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:40:22,809 INFO L87 Difference]: Start difference. First operand 176 states and 192 transitions. Second operand 14 states. [2020-10-13 04:40:24,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:24,155 INFO L93 Difference]: Finished difference Result 360 states and 397 transitions. [2020-10-13 04:40:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:40:24,157 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 102 [2020-10-13 04:40:24,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:24,159 INFO L225 Difference]: With dead ends: 360 [2020-10-13 04:40:24,160 INFO L226 Difference]: Without dead ends: 203 [2020-10-13 04:40:24,160 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:40:24,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-13 04:40:24,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 187. [2020-10-13 04:40:24,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-13 04:40:24,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 202 transitions. [2020-10-13 04:40:24,175 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 202 transitions. Word has length 102 [2020-10-13 04:40:24,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:24,175 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 202 transitions. [2020-10-13 04:40:24,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:40:24,175 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 202 transitions. [2020-10-13 04:40:24,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 04:40:24,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:24,177 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:24,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:40:24,177 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:24,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:24,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1758618999, now seen corresponding path program 10 times [2020-10-13 04:40:24,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:24,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1795825456] [2020-10-13 04:40:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:24,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:24,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:24,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:24,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:24,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:29,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:29,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 04:40:29,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:40:29,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:40:29,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:29,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:40:29,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:40:29,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:40:29,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:29,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:29,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:29,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:29,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:29,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:29,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:40:29,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:29,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:29,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:29,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:29,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:29,377 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-13 04:40:29,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1795825456] [2020-10-13 04:40:29,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:29,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:40:29,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214279180] [2020-10-13 04:40:29,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:40:29,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:29,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:40:29,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:40:29,379 INFO L87 Difference]: Start difference. First operand 187 states and 202 transitions. Second operand 14 states. [2020-10-13 04:40:30,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:30,537 INFO L93 Difference]: Finished difference Result 194 states and 209 transitions. [2020-10-13 04:40:30,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:40:30,539 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 102 [2020-10-13 04:40:30,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:30,541 INFO L225 Difference]: With dead ends: 194 [2020-10-13 04:40:30,541 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 04:40:30,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=458, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:40:30,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 04:40:30,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-13 04:40:30,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-13 04:40:30,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 127 transitions. [2020-10-13 04:40:30,555 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 127 transitions. Word has length 102 [2020-10-13 04:40:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:30,555 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 127 transitions. [2020-10-13 04:40:30,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:40:30,556 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 127 transitions. [2020-10-13 04:40:30,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 04:40:30,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:30,557 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:30,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:40:30,557 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:30,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:30,558 INFO L82 PathProgramCache]: Analyzing trace with hash -871558023, now seen corresponding path program 11 times [2020-10-13 04:40:30,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:30,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053748209] [2020-10-13 04:40:30,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:30,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:32,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:35,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:35,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-13 04:40:35,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:35,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:40:35,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:35,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 84 [2020-10-13 04:40:35,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:40:35,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-13 04:40:35,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:51,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:51,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:51,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:51,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:51,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:51,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:40:51,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:51,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:51,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:51,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:51,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 04:40:52,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053748209] [2020-10-13 04:40:52,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:52,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-10-13 04:40:52,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392839465] [2020-10-13 04:40:52,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-13 04:40:52,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:52,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-13 04:40:52,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=5998, Unknown=0, NotChecked=0, Total=6162 [2020-10-13 04:40:52,006 INFO L87 Difference]: Start difference. First operand 119 states and 127 transitions. Second operand 79 states. [2020-10-13 04:41:13,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:13,985 INFO L93 Difference]: Finished difference Result 213 states and 228 transitions. [2020-10-13 04:41:13,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-13 04:41:13,987 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 118 [2020-10-13 04:41:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:13,990 INFO L225 Difference]: With dead ends: 213 [2020-10-13 04:41:13,991 INFO L226 Difference]: Without dead ends: 208 [2020-10-13 04:41:13,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=174, Invalid=6306, Unknown=0, NotChecked=0, Total=6480 [2020-10-13 04:41:13,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-13 04:41:14,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 196. [2020-10-13 04:41:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-13 04:41:14,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 211 transitions. [2020-10-13 04:41:14,013 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 211 transitions. Word has length 118 [2020-10-13 04:41:14,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:14,014 INFO L479 AbstractCegarLoop]: Abstraction has 196 states and 211 transitions. [2020-10-13 04:41:14,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-10-13 04:41:14,014 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 211 transitions. [2020-10-13 04:41:14,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-13 04:41:14,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:14,017 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:14,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:41:14,018 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:14,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:14,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1779640023, now seen corresponding path program 12 times [2020-10-13 04:41:14,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:14,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258353852] [2020-10-13 04:41:14,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:14,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:14,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:14,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:14,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:14,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:19,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:19,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-13 04:41:19,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:41:19,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:41:19,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:19,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:41:19,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:41:19,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:41:19,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:19,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:19,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:19,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:19,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:19,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:19,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:19,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:19,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:19,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:19,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:19,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-13 04:41:19,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258353852] [2020-10-13 04:41:19,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:19,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:41:19,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104879639] [2020-10-13 04:41:19,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:41:19,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:19,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:41:19,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:41:19,305 INFO L87 Difference]: Start difference. First operand 196 states and 211 transitions. Second operand 16 states. [2020-10-13 04:41:21,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:21,116 INFO L93 Difference]: Finished difference Result 410 states and 446 transitions. [2020-10-13 04:41:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:41:21,118 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 120 [2020-10-13 04:41:21,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:21,120 INFO L225 Difference]: With dead ends: 410 [2020-10-13 04:41:21,120 INFO L226 Difference]: Without dead ends: 223 [2020-10-13 04:41:21,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:41:21,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-13 04:41:21,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 207. [2020-10-13 04:41:21,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-13 04:41:21,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 221 transitions. [2020-10-13 04:41:21,137 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 221 transitions. Word has length 120 [2020-10-13 04:41:21,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:21,137 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 221 transitions. [2020-10-13 04:41:21,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:41:21,137 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 221 transitions. [2020-10-13 04:41:21,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 04:41:21,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:21,139 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:21,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:41:21,139 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:21,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:21,139 INFO L82 PathProgramCache]: Analyzing trace with hash -163898891, now seen corresponding path program 13 times [2020-10-13 04:41:21,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:21,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102020797] [2020-10-13 04:41:21,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:21,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:21,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:21,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:21,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:21,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:26,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:26,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 04:41:26,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:41:26,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:41:26,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:26,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:41:26,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-13 04:41:26,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:41:26,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:26,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:26,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:26,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:26,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:26,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:26,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:26,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:26,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:26,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:26,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:26,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2020-10-13 04:41:26,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102020797] [2020-10-13 04:41:26,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:26,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:41:26,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682074767] [2020-10-13 04:41:26,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:41:26,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:26,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:41:26,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:41:26,454 INFO L87 Difference]: Start difference. First operand 207 states and 221 transitions. Second operand 16 states. [2020-10-13 04:41:28,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:28,347 INFO L93 Difference]: Finished difference Result 214 states and 228 transitions. [2020-10-13 04:41:28,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:41:28,349 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 122 [2020-10-13 04:41:28,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:28,350 INFO L225 Difference]: With dead ends: 214 [2020-10-13 04:41:28,351 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 04:41:28,352 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:41:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 04:41:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-10-13 04:41:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 04:41:28,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 145 transitions. [2020-10-13 04:41:28,364 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 145 transitions. Word has length 122 [2020-10-13 04:41:28,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:28,365 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 145 transitions. [2020-10-13 04:41:28,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:41:28,365 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 145 transitions. [2020-10-13 04:41:28,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 04:41:28,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:28,367 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:28,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:41:28,367 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:28,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:28,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1979542265, now seen corresponding path program 14 times [2020-10-13 04:41:28,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:28,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211929541] [2020-10-13 04:41:28,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:28,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:32,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:37,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:37,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 04:41:37,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:37,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8680 [2020-10-13 04:41:37,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:37,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 102 [2020-10-13 04:41:37,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:41:37,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-13 04:41:37,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:39,376 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-13 04:41:39,665 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-10-13 04:41:39,968 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-13 04:41:40,291 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-10-13 04:41:40,584 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-13 04:41:40,914 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-13 04:41:41,248 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-13 04:41:43,102 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-13 04:41:43,494 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-13 04:41:44,300 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-13 04:41:45,589 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-13 04:41:46,291 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-10-13 04:41:47,012 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-13 04:41:47,460 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-13 04:41:48,202 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 67 [2020-10-13 04:41:48,939 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-13 04:41:49,659 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-13 04:41:50,433 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-10-13 04:41:51,178 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-13 04:41:51,952 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-13 04:41:52,694 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-13 04:41:53,458 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-13 04:41:54,167 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61