/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 23:18:53,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 23:18:53,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 23:18:53,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 23:18:53,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 23:18:53,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 23:18:53,701 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 23:18:53,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 23:18:53,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 23:18:53,710 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 23:18:53,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 23:18:53,712 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 23:18:53,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 23:18:53,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 23:18:53,717 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 23:18:53,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 23:18:53,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 23:18:53,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 23:18:53,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 23:18:53,731 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 23:18:53,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 23:18:53,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 23:18:53,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 23:18:53,736 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 23:18:53,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 23:18:53,739 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 23:18:53,739 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 23:18:53,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 23:18:53,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 23:18:53,741 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 23:18:53,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 23:18:53,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 23:18:53,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 23:18:53,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 23:18:53,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 23:18:53,744 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 23:18:53,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 23:18:53,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 23:18:53,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 23:18:53,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 23:18:53,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 23:18:53,747 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 23:18:53,769 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 23:18:53,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 23:18:53,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 23:18:53,771 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 23:18:53,771 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 23:18:53,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 23:18:53,771 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 23:18:53,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 23:18:53,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 23:18:53,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 23:18:53,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 23:18:53,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 23:18:53,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 23:18:53,773 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 23:18:53,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 23:18:53,773 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 23:18:53,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 23:18:53,773 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 23:18:53,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 23:18:53,774 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 23:18:53,774 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 23:18:53,774 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 23:18:53,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 23:18:53,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 23:18:53,775 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 23:18:53,775 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 23:18:53,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 23:18:53,775 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 23:18:53,776 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 23:18:53,776 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-13 23:18:54,101 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 23:18:54,115 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 23:18:54,118 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 23:18:54,120 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 23:18:54,121 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 23:18:54,121 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2020-10-13 23:18:54,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d1ae12ce/e777901feb0442b497cc85fd70dc761f/FLAGf27c1bd07 [2020-10-13 23:18:54,619 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 23:18:54,620 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2020-10-13 23:18:54,626 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d1ae12ce/e777901feb0442b497cc85fd70dc761f/FLAGf27c1bd07 [2020-10-13 23:18:55,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6d1ae12ce/e777901feb0442b497cc85fd70dc761f [2020-10-13 23:18:55,076 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 23:18:55,078 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 23:18:55,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 23:18:55,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 23:18:55,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 23:18:55,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:18:55" (1/1) ... [2020-10-13 23:18:55,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35692340 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55, skipping insertion in model container [2020-10-13 23:18:55,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:18:55" (1/1) ... [2020-10-13 23:18:55,097 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 23:18:55,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 23:18:55,312 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:18:55,324 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 23:18:55,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 23:18:55,362 INFO L208 MainTranslator]: Completed translation [2020-10-13 23:18:55,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55 WrapperNode [2020-10-13 23:18:55,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 23:18:55,364 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 23:18:55,364 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 23:18:55,364 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 23:18:55,461 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (1/1) ... [2020-10-13 23:18:55,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (1/1) ... [2020-10-13 23:18:55,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (1/1) ... [2020-10-13 23:18:55,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (1/1) ... [2020-10-13 23:18:55,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (1/1) ... [2020-10-13 23:18:55,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (1/1) ... [2020-10-13 23:18:55,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (1/1) ... [2020-10-13 23:18:55,523 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 23:18:55,524 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 23:18:55,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 23:18:55,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 23:18:55,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (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 23:18:55,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 23:18:55,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 23:18:55,590 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 23:18:55,591 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 23:18:55,591 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 23:18:55,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 23:18:55,591 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 23:18:55,591 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 23:18:55,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 23:18:55,592 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-13 23:18:55,592 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 23:18:55,592 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 23:18:55,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 23:18:55,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 23:18:55,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 23:18:55,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 23:18:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 23:18:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 23:18:55,890 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 23:18:55,891 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 23:18:55,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:18:55 BoogieIcfgContainer [2020-10-13 23:18:55,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 23:18:55,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 23:18:55,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 23:18:55,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 23:18:55,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:18:55" (1/3) ... [2020-10-13 23:18:55,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f733bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:18:55, skipping insertion in model container [2020-10-13 23:18:55,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:18:55" (2/3) ... [2020-10-13 23:18:55,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f733bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:18:55, skipping insertion in model container [2020-10-13 23:18:55,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:18:55" (3/3) ... [2020-10-13 23:18:55,905 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2020-10-13 23:18:55,916 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 23:18:55,923 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 23:18:55,946 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 23:18:55,996 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 23:18:55,997 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 23:18:55,997 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 23:18:55,997 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 23:18:55,997 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 23:18:55,997 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 23:18:55,997 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 23:18:55,998 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 23:18:56,029 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-13 23:18:56,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 23:18:56,034 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:56,035 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] [2020-10-13 23:18:56,036 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:56,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:56,042 INFO L82 PathProgramCache]: Analyzing trace with hash -96391067, now seen corresponding path program 1 times [2020-10-13 23:18:56,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:56,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60122445] [2020-10-13 23:18:56,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:56,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:56,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 23:18:56,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:18:56,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 600 [2020-10-13 23:18:56,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:56,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:56,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:56,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 23:18:56,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:56,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:18:56,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:18:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:56,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:56,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:56,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:18:56,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:18:56,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 23:18:56,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:56,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:56,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:56,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:18:56,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:56,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:18:56,850 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 23:18:56,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60122445] [2020-10-13 23:18:56,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:18:56,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 23:18:56,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160203206] [2020-10-13 23:18:56,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 23:18:56,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:18:56,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 23:18:56,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 23:18:56,879 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-13 23:18:56,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:18:56,991 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2020-10-13 23:18:56,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 23:18:56,994 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-13 23:18:56,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:18:57,003 INFO L225 Difference]: With dead ends: 57 [2020-10-13 23:18:57,003 INFO L226 Difference]: Without dead ends: 26 [2020-10-13 23:18:57,007 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 23:18:57,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-13 23:18:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-13 23:18:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-13 23:18:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-10-13 23:18:57,050 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-10-13 23:18:57,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:18:57,051 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-10-13 23:18:57,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 23:18:57,051 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-10-13 23:18:57,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 23:18:57,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:57,053 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] [2020-10-13 23:18:57,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 23:18:57,053 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:57,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:57,054 INFO L82 PathProgramCache]: Analyzing trace with hash -974847405, now seen corresponding path program 1 times [2020-10-13 23:18:57,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:57,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532157239] [2020-10-13 23:18:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:57,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:57,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:57,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:57,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:57,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:57,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:58,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:58,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 23:18:58,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:18:58,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 997 [2020-10-13 23:18:58,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:58,069 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:58,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 23:18:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:18:58,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 23:18:58,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:18:58,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:18:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:58,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:58,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:18:58,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:18:58,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:18:58,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 23:18:58,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:18:58,147 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:18:58,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:18:58,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:18:58,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:18:58,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:18:58,153 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 23:18:58,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532157239] [2020-10-13 23:18:58,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:18:58,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 23:18:58,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4734764] [2020-10-13 23:18:58,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 23:18:58,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:18:58,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 23:18:58,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 23:18:58,158 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 4 states. [2020-10-13 23:18:58,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:18:58,245 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-10-13 23:18:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 23:18:58,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 23:18:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:18:58,247 INFO L225 Difference]: With dead ends: 45 [2020-10-13 23:18:58,247 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 23:18:58,249 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 23:18:58,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 23:18:58,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-13 23:18:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 23:18:58,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-10-13 23:18:58,256 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2020-10-13 23:18:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:18:58,257 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-10-13 23:18:58,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 23:18:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-10-13 23:18:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 23:18:58,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:18:58,258 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] [2020-10-13 23:18:58,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 23:18:58,259 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:18:58,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:18:58,259 INFO L82 PathProgramCache]: Analyzing trace with hash 678014577, now seen corresponding path program 1 times [2020-10-13 23:18:58,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:18:58,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607510294] [2020-10-13 23:18:58,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:18:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:18:58,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:58,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:58,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:58,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:58,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:18:59,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:00,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 23:19:00,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:19:00,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1919 [2020-10-13 23:19:00,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:00,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:00,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:19:00,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:00,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 23:19:00,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:00,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:00,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:00,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:00,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:00,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:00,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:00,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:00,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:00,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:00,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:00,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 23:19:00,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607510294] [2020-10-13 23:19:00,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:19:00,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 23:19:00,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793554465] [2020-10-13 23:19:00,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:19:00,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:00,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:19:00,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:19:00,253 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 6 states. [2020-10-13 23:19:00,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:00,391 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-13 23:19:00,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:19:00,391 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 23:19:00,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:00,393 INFO L225 Difference]: With dead ends: 39 [2020-10-13 23:19:00,393 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 23:19:00,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:19:00,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 23:19:00,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-13 23:19:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 23:19:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-13 23:19:00,402 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 22 [2020-10-13 23:19:00,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:00,402 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-13 23:19:00,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:19:00,403 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-13 23:19:00,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 23:19:00,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:00,404 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] [2020-10-13 23:19:00,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 23:19:00,405 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:00,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:00,405 INFO L82 PathProgramCache]: Analyzing trace with hash 89455311, now seen corresponding path program 1 times [2020-10-13 23:19:00,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:00,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537354618] [2020-10-13 23:19:00,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:00,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:00,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:02,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:02,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 23:19:02,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 23:19:02,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2062 [2020-10-13 23:19:02,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:02,478 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:02,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 23:19:02,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:02,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 23:19:02,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:02,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:02,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:02,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:02,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:02,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:02,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:02,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:02,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:02,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:02,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:02,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:02,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 23:19:02,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537354618] [2020-10-13 23:19:02,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 23:19:02,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 23:19:02,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347847246] [2020-10-13 23:19:02,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 23:19:02,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:02,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 23:19:02,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 23:19:02,543 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2020-10-13 23:19:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:02,668 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-10-13 23:19:02,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 23:19:02,669 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-13 23:19:02,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:02,669 INFO L225 Difference]: With dead ends: 55 [2020-10-13 23:19:02,670 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 23:19:02,670 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 23:19:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 23:19:02,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2020-10-13 23:19:02,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 23:19:02,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-13 23:19:02,677 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2020-10-13 23:19:02,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:02,677 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-13 23:19:02,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 23:19:02,678 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-13 23:19:02,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 23:19:02,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:02,679 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 23:19:02,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 23:19:02,679 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:02,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:02,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1675977065, now seen corresponding path program 1 times [2020-10-13 23:19:02,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:02,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629361667] [2020-10-13 23:19:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:02,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:02,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:02,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:02,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:02,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:05,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:05,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:06,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:06,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:07,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 23:19:07,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 23:19:07,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:19:07,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:07,694 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:07,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 23:19:07,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:07,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 23:19:07,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:07,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:07,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:07,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:07,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:07,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:07,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:07,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:07,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:07,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:07,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:07,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:07,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:07,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:19:07,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629361667] [2020-10-13 23:19:07,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:07,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 23:19:07,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250129189] [2020-10-13 23:19:07,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 23:19:07,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:07,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 23:19:07,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 23:19:07,756 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2020-10-13 23:19:07,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:07,928 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2020-10-13 23:19:07,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 23:19:07,928 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-13 23:19:07,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:07,929 INFO L225 Difference]: With dead ends: 62 [2020-10-13 23:19:07,929 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 23:19:07,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-13 23:19:07,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 23:19:07,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-13 23:19:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 23:19:07,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-13 23:19:07,943 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 30 [2020-10-13 23:19:07,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:07,943 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-13 23:19:07,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 23:19:07,945 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-13 23:19:07,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 23:19:07,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:07,949 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:19:07,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 23:19:07,949 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:07,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:07,950 INFO L82 PathProgramCache]: Analyzing trace with hash 850205951, now seen corresponding path program 2 times [2020-10-13 23:19:07,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:07,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584735864] [2020-10-13 23:19:07,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:07,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:07,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:08,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:08,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:09,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:09,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:09,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:10,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:11,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:11,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:11,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:12,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:12,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:12,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:13,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 23:19:13,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 23:19:13,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-13 23:19:13,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:13,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:13,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 23:19:13,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:13,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 23:19:13,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:13,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:13,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:13,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:13,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:13,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:13,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:19:13,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:13,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:13,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:13,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:13,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:13,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 23:19:13,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584735864] [2020-10-13 23:19:13,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:13,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:19:13,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184583826] [2020-10-13 23:19:13,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:19:13,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:13,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:19:13,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:19:13,503 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 16 states. [2020-10-13 23:19:14,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:14,036 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-10-13 23:19:14,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 23:19:14,037 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-13 23:19:14,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:14,038 INFO L225 Difference]: With dead ends: 66 [2020-10-13 23:19:14,038 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 23:19:14,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:19:14,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 23:19:14,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2020-10-13 23:19:14,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-13 23:19:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2020-10-13 23:19:14,048 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 40 [2020-10-13 23:19:14,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:14,049 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2020-10-13 23:19:14,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:19:14,049 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2020-10-13 23:19:14,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:19:14,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:14,050 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-13 23:19:14,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 23:19:14,051 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:14,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:14,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1075461597, now seen corresponding path program 3 times [2020-10-13 23:19:14,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:14,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267013628] [2020-10-13 23:19:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:14,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:14,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:14,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:14,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:19,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:19,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:19:19,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:19:19,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:19:19,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:19,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:19,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:19:19,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 23:19:19,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 23:19:19,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:19,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:19,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:19,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:19,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:19,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:19,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:19,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:19,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:19,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:19:19,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267013628] [2020-10-13 23:19:19,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:19,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:19:19,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868752927] [2020-10-13 23:19:19,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:19:19,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:19,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:19:19,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:19:19,188 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand 10 states. [2020-10-13 23:19:19,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:19,693 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2020-10-13 23:19:19,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:19:19,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-13 23:19:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:19,696 INFO L225 Difference]: With dead ends: 109 [2020-10-13 23:19:19,696 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 23:19:19,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:19:19,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 23:19:19,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 64. [2020-10-13 23:19:19,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 23:19:19,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2020-10-13 23:19:19,706 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 42 [2020-10-13 23:19:19,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:19,707 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2020-10-13 23:19:19,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:19:19,707 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2020-10-13 23:19:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 23:19:19,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:19,709 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-13 23:19:19,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 23:19:19,709 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:19,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:19,709 INFO L82 PathProgramCache]: Analyzing trace with hash 2017471773, now seen corresponding path program 4 times [2020-10-13 23:19:19,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:19,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618309077] [2020-10-13 23:19:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:19,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:19,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:19,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:19,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:24,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:24,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 23:19:24,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:19:24,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:19:24,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:24,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:24,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 23:19:24,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:24,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 23:19:24,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:24,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:24,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:24,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:24,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:24,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:24,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:24,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:24,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:24,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:24,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:24,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:24,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 23:19:24,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618309077] [2020-10-13 23:19:24,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:24,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 23:19:24,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709633385] [2020-10-13 23:19:24,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 23:19:24,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:24,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 23:19:24,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 23:19:24,821 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand 10 states. [2020-10-13 23:19:25,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:25,141 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2020-10-13 23:19:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 23:19:25,142 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 42 [2020-10-13 23:19:25,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:25,143 INFO L225 Difference]: With dead ends: 111 [2020-10-13 23:19:25,143 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 23:19:25,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 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 23:19:25,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 23:19:25,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-10-13 23:19:25,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-13 23:19:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-10-13 23:19:25,165 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 42 [2020-10-13 23:19:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:25,165 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-10-13 23:19:25,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 23:19:25,166 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-10-13 23:19:25,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 23:19:25,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:25,167 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 23:19:25,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 23:19:25,169 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:25,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:25,169 INFO L82 PathProgramCache]: Analyzing trace with hash -86338283, now seen corresponding path program 5 times [2020-10-13 23:19:25,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:25,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901722003] [2020-10-13 23:19:25,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:25,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:25,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:26,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:26,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:26,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:27,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:27,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:27,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:27,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:28,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:28,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:28,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:28,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:30,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:30,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 23:19:30,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 23:19:30,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:19:30,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:30,206 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:30,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 23:19:30,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:30,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 23:19:30,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:31,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:31,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:31,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:31,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:31,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:31,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 23:19:31,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:31,643 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:31,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:31,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:31,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:31,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 23:19:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 23:19:31,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901722003] [2020-10-13 23:19:31,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:31,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 23:19:31,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419454405] [2020-10-13 23:19:31,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 23:19:31,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:31,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 23:19:31,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2020-10-13 23:19:31,674 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 28 states. [2020-10-13 23:19:32,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:32,434 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2020-10-13 23:19:32,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 23:19:32,435 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 50 [2020-10-13 23:19:32,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:32,436 INFO L225 Difference]: With dead ends: 82 [2020-10-13 23:19:32,436 INFO L226 Difference]: Without dead ends: 77 [2020-10-13 23:19:32,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2020-10-13 23:19:32,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-13 23:19:32,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2020-10-13 23:19:32,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 23:19:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2020-10-13 23:19:32,454 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 50 [2020-10-13 23:19:32,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:32,454 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2020-10-13 23:19:32,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 23:19:32,454 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2020-10-13 23:19:32,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:19:32,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:32,458 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-13 23:19:32,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 23:19:32,458 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:32,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:32,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1334859661, now seen corresponding path program 6 times [2020-10-13 23:19:32,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:32,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828399783] [2020-10-13 23:19:32,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:32,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:32,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:32,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:32,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:33,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:37,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:37,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:19:37,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:19:37,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 23:19:37,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:37,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:37,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:19:37,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 23:19:37,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 23:19:37,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:37,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:37,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:37,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:37,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:37,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:37,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:37,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:37,583 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:37,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:37,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:37,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:37,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:37,589 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 23:19:37,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828399783] [2020-10-13 23:19:37,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:37,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:19:37,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837264369] [2020-10-13 23:19:37,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:19:37,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:37,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:19:37,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:19:37,592 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 12 states. [2020-10-13 23:19:38,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:38,219 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2020-10-13 23:19:38,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:19:38,219 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-13 23:19:38,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:38,221 INFO L225 Difference]: With dead ends: 135 [2020-10-13 23:19:38,221 INFO L226 Difference]: Without dead ends: 93 [2020-10-13 23:19:38,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-13 23:19:38,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-13 23:19:38,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2020-10-13 23:19:38,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 23:19:38,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2020-10-13 23:19:38,232 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 52 [2020-10-13 23:19:38,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:38,233 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2020-10-13 23:19:38,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:19:38,233 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2020-10-13 23:19:38,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 23:19:38,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:38,234 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-13 23:19:38,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 23:19:38,234 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:38,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:38,235 INFO L82 PathProgramCache]: Analyzing trace with hash -353372237, now seen corresponding path program 7 times [2020-10-13 23:19:38,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:38,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848576303] [2020-10-13 23:19:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:38,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:38,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:38,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:38,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:43,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:43,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 23:19:43,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:19:43,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:19:43,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:43,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:43,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 23:19:43,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:43,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 23:19:43,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:43,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:43,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:43,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:43,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:43,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:43,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:43,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:19:43,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:43,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:43,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:43,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:19:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 23:19:43,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848576303] [2020-10-13 23:19:43,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:43,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 23:19:43,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427150699] [2020-10-13 23:19:43,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 23:19:43,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:43,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 23:19:43,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 23:19:43,361 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand 12 states. [2020-10-13 23:19:43,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:43,733 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2020-10-13 23:19:43,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 23:19:43,734 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2020-10-13 23:19:43,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:43,735 INFO L225 Difference]: With dead ends: 135 [2020-10-13 23:19:43,735 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 23:19:43,736 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 23:19:43,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 23:19:43,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2020-10-13 23:19:43,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 23:19:43,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2020-10-13 23:19:43,744 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 52 [2020-10-13 23:19:43,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:43,745 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2020-10-13 23:19:43,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 23:19:43,745 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2020-10-13 23:19:43,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 23:19:43,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:43,746 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 23:19:43,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 23:19:43,746 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:43,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:43,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1466685013, now seen corresponding path program 8 times [2020-10-13 23:19:43,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:43,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643596133] [2020-10-13 23:19:43,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:43,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:44,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:44,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:45,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:45,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:46,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:46,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:46,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:47,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:48,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:48,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 23:19:48,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 23:19:48,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:19:48,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:48,775 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:48,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 23:19:48,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:19:48,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 23:19:48,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:51,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:19:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:51,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:51,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:19:51,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:19:51,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:19:51,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:19:51,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:19:51,651 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:19:51,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:19:51,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:19:51,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:19:51,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:19:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:19:51,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643596133] [2020-10-13 23:19:51,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:19:51,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 23:19:51,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191604075] [2020-10-13 23:19:51,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 23:19:51,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:19:51,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 23:19:51,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1725, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 23:19:51,687 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 44 states. [2020-10-13 23:19:51,956 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-10-13 23:19:53,021 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-13 23:19:53,508 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2020-10-13 23:19:54,113 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-13 23:19:55,416 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-13 23:19:56,143 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 53 [2020-10-13 23:19:56,455 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-13 23:19:57,352 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-13 23:19:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:19:58,520 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2020-10-13 23:19:58,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-13 23:19:58,521 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 60 [2020-10-13 23:19:58,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:19:58,528 INFO L225 Difference]: With dead ends: 134 [2020-10-13 23:19:58,529 INFO L226 Difference]: Without dead ends: 128 [2020-10-13 23:19:58,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1366 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=528, Invalid=6114, Unknown=0, NotChecked=0, Total=6642 [2020-10-13 23:19:58,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-13 23:19:58,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2020-10-13 23:19:58,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 23:19:58,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2020-10-13 23:19:58,558 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 60 [2020-10-13 23:19:58,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:19:58,559 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2020-10-13 23:19:58,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 23:19:58,559 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2020-10-13 23:19:58,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:19:58,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:19:58,560 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-13 23:19:58,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 23:19:58,561 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:19:58,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:19:58,561 INFO L82 PathProgramCache]: Analyzing trace with hash 278314697, now seen corresponding path program 9 times [2020-10-13 23:19:58,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:19:58,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16886021] [2020-10-13 23:19:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:19:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:19:58,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:58,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:58,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:19:58,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:03,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:03,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:20:03,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:20:03,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:20:03,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:03,576 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:03,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:20:03,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:03,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:20:03,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:03,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:03,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:03,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:03,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:03,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:03,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:03,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:03,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:03,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:03,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:03,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:03,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 23:20:03,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16886021] [2020-10-13 23:20:03,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:03,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:20:03,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118407888] [2020-10-13 23:20:03,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:20:03,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:03,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:20:03,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:20:03,715 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 14 states. [2020-10-13 23:20:04,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:04,216 INFO L93 Difference]: Finished difference Result 203 states and 222 transitions. [2020-10-13 23:20:04,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 23:20:04,217 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-13 23:20:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:04,218 INFO L225 Difference]: With dead ends: 203 [2020-10-13 23:20:04,219 INFO L226 Difference]: Without dead ends: 111 [2020-10-13 23:20:04,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:20:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-13 23:20:04,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2020-10-13 23:20:04,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-13 23:20:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 106 transitions. [2020-10-13 23:20:04,242 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 106 transitions. Word has length 62 [2020-10-13 23:20:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:04,243 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 106 transitions. [2020-10-13 23:20:04,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:20:04,244 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 106 transitions. [2020-10-13 23:20:04,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 23:20:04,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:04,246 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-13 23:20:04,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 23:20:04,246 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:04,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:04,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1321328585, now seen corresponding path program 10 times [2020-10-13 23:20:04,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:04,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108687593] [2020-10-13 23:20:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:04,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:04,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:04,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:09,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:09,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 23:20:09,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:20:09,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:20:09,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:09,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:09,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 23:20:09,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:09,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 23:20:09,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:09,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:09,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:09,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:09,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:09,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:09,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:20:09,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:09,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:09,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:09,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:09,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:09,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 23:20:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 23:20:09,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108687593] [2020-10-13 23:20:09,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:09,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 23:20:09,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570741234] [2020-10-13 23:20:09,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 23:20:09,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:09,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 23:20:09,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-10-13 23:20:09,439 INFO L87 Difference]: Start difference. First operand 99 states and 106 transitions. Second operand 14 states. [2020-10-13 23:20:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:10,093 INFO L93 Difference]: Finished difference Result 106 states and 113 transitions. [2020-10-13 23:20:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 23:20:10,094 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 62 [2020-10-13 23:20:10,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:10,095 INFO L225 Difference]: With dead ends: 106 [2020-10-13 23:20:10,095 INFO L226 Difference]: Without dead ends: 71 [2020-10-13 23:20:10,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-10-13 23:20:10,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-13 23:20:10,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-13 23:20:10,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-13 23:20:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-13 23:20:10,106 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 62 [2020-10-13 23:20:10,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:10,106 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-13 23:20:10,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 23:20:10,106 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-13 23:20:10,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-13 23:20:10,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:10,110 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 23:20:10,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 23:20:10,111 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:10,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:10,111 INFO L82 PathProgramCache]: Analyzing trace with hash 25705153, now seen corresponding path program 11 times [2020-10-13 23:20:10,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:10,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078413071] [2020-10-13 23:20:10,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:10,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:10,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:11,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:11,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:12,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:14,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:15,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:15,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 23:20:15,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 23:20:15,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 23:20:15,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:15,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:15,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-13 23:20:15,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:15,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 23:20:15,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:16,179 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-10-13 23:20:16,491 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-10-13 23:20:20,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:20,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:20,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:20,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:20,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:20,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:20,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:20,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:20,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:20,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:20,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:20,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 12 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:20:20,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078413071] [2020-10-13 23:20:20,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:20,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-13 23:20:20,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849979447] [2020-10-13 23:20:20,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-13 23:20:20,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:20,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-13 23:20:20,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2467, Unknown=0, NotChecked=0, Total=2756 [2020-10-13 23:20:20,745 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 53 states. [2020-10-13 23:20:21,087 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 72 [2020-10-13 23:20:21,528 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 33 [2020-10-13 23:20:21,765 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2020-10-13 23:20:22,757 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 55 [2020-10-13 23:20:23,055 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 64 [2020-10-13 23:20:23,348 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-10-13 23:20:23,584 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 37 [2020-10-13 23:20:24,039 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 101 [2020-10-13 23:20:24,498 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-13 23:20:24,809 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 90 [2020-10-13 23:20:25,053 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-13 23:20:25,301 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-10-13 23:20:25,876 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-13 23:20:26,476 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-13 23:20:26,972 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 33 [2020-10-13 23:20:28,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:28,406 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2020-10-13 23:20:28,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 23:20:28,407 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 70 [2020-10-13 23:20:28,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:28,408 INFO L225 Difference]: With dead ends: 147 [2020-10-13 23:20:28,409 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 23:20:28,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1570 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=728, Invalid=5752, Unknown=0, NotChecked=0, Total=6480 [2020-10-13 23:20:28,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 23:20:28,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 100. [2020-10-13 23:20:28,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 23:20:28,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-10-13 23:20:28,422 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 70 [2020-10-13 23:20:28,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:28,423 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-10-13 23:20:28,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-13 23:20:28,423 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-10-13 23:20:28,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 23:20:28,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:28,424 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-13 23:20:28,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 23:20:28,424 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:28,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:28,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1363006239, now seen corresponding path program 12 times [2020-10-13 23:20:28,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:28,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465863412] [2020-10-13 23:20:28,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:28,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:28,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:28,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:33,438 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:33,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 23:20:33,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:20:33,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 23:20:33,439 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:33,439 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:33,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:20:33,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 23:20:33,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 23:20:33,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:33,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:33,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:33,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:33,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:33,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:33,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 23:20:33,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:33,631 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:33,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:33,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:33,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:33,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 23:20:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-13 23:20:33,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465863412] [2020-10-13 23:20:33,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:33,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:20:33,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520622282] [2020-10-13 23:20:33,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:20:33,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:33,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:20:33,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:20:33,658 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 16 states. [2020-10-13 23:20:34,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:34,832 INFO L93 Difference]: Finished difference Result 172 states and 186 transitions. [2020-10-13 23:20:34,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:20:34,833 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 72 [2020-10-13 23:20:34,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:34,834 INFO L225 Difference]: With dead ends: 172 [2020-10-13 23:20:34,835 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 23:20:34,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-10-13 23:20:34,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 23:20:34,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 94. [2020-10-13 23:20:34,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-13 23:20:34,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 100 transitions. [2020-10-13 23:20:34,851 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 100 transitions. Word has length 72 [2020-10-13 23:20:34,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:34,851 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 100 transitions. [2020-10-13 23:20:34,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:20:34,851 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 100 transitions. [2020-10-13 23:20:34,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-13 23:20:34,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:34,852 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2020-10-13 23:20:34,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 23:20:34,852 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:34,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:34,853 INFO L82 PathProgramCache]: Analyzing trace with hash 609467069, now seen corresponding path program 13 times [2020-10-13 23:20:34,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:34,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056239918] [2020-10-13 23:20:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:34,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:34,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:34,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:34,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:39,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:39,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 23:20:39,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:20:39,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 23:20:39,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:39,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:39,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 23:20:39,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:39,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 23:20:39,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:40,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:40,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:40,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:40,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:40,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:40,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:40,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:40,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:40,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:40,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:40,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:40,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-13 23:20:40,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056239918] [2020-10-13 23:20:40,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:40,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 23:20:40,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227394229] [2020-10-13 23:20:40,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 23:20:40,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:40,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 23:20:40,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-13 23:20:40,032 INFO L87 Difference]: Start difference. First operand 94 states and 100 transitions. Second operand 16 states. [2020-10-13 23:20:40,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:20:40,615 INFO L93 Difference]: Finished difference Result 171 states and 181 transitions. [2020-10-13 23:20:40,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 23:20:40,616 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 74 [2020-10-13 23:20:40,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:20:40,617 INFO L225 Difference]: With dead ends: 171 [2020-10-13 23:20:40,617 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 23:20:40,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-13 23:20:40,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 23:20:40,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2020-10-13 23:20:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-13 23:20:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2020-10-13 23:20:40,627 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 74 [2020-10-13 23:20:40,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:20:40,628 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2020-10-13 23:20:40,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 23:20:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2020-10-13 23:20:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 23:20:40,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:20:40,629 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 23:20:40,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 23:20:40,629 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:20:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:20:40,629 INFO L82 PathProgramCache]: Analyzing trace with hash -621991849, now seen corresponding path program 14 times [2020-10-13 23:20:40,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:20:40,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545046762] [2020-10-13 23:20:40,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:20:40,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:40,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:41,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:44,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:44,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:45,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:45,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 23:20:45,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:20:45,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 23:20:45,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:45,673 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:45,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-13 23:20:45,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:20:45,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 23:20:45,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:46,544 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 25 [2020-10-13 23:20:47,223 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 39 [2020-10-13 23:20:47,676 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2020-10-13 23:20:48,648 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-13 23:20:49,072 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2020-10-13 23:20:49,301 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-10-13 23:20:49,567 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-13 23:20:49,866 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2020-10-13 23:20:50,203 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2020-10-13 23:20:50,449 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 37 [2020-10-13 23:20:50,722 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2020-10-13 23:20:50,988 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-13 23:20:51,246 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-10-13 23:20:51,520 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-13 23:20:51,783 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-13 23:20:52,063 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-13 23:20:54,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:20:54,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:20:54,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:20:54,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:20:54,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:20:54,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:20:54,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:20:54,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:20:54,752 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:20:54,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:20:54,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:20:54,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:20:54,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:20:54,798 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 36 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:20:54,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545046762] [2020-10-13 23:20:54,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:20:54,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-13 23:20:54,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063398337] [2020-10-13 23:20:54,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-13 23:20:54,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:20:54,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-13 23:20:54,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=3401, Unknown=0, NotChecked=0, Total=3782 [2020-10-13 23:20:54,802 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand 62 states. [2020-10-13 23:20:55,308 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 18 [2020-10-13 23:20:56,518 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-13 23:20:57,076 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-13 23:20:57,690 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 83 [2020-10-13 23:20:58,142 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 84 [2020-10-13 23:20:58,541 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 87 [2020-10-13 23:20:58,857 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2020-10-13 23:20:59,145 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 75 [2020-10-13 23:20:59,465 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 75 [2020-10-13 23:21:00,213 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 75 [2020-10-13 23:21:00,862 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 72 [2020-10-13 23:21:01,581 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 81 [2020-10-13 23:21:01,959 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 71 [2020-10-13 23:21:02,394 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 80 [2020-10-13 23:21:02,773 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 60 [2020-10-13 23:21:03,505 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-10-13 23:21:04,313 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-13 23:21:04,976 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2020-10-13 23:21:06,006 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 110 [2020-10-13 23:21:06,697 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 96 [2020-10-13 23:21:07,051 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2020-10-13 23:21:07,387 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 58 [2020-10-13 23:21:07,759 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2020-10-13 23:21:08,377 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 66 [2020-10-13 23:21:08,745 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 65 [2020-10-13 23:21:09,174 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 43 [2020-10-13 23:21:09,550 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 49 [2020-10-13 23:21:12,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:12,419 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2020-10-13 23:21:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-13 23:21:12,420 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 80 [2020-10-13 23:21:12,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:12,421 INFO L225 Difference]: With dead ends: 160 [2020-10-13 23:21:12,421 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 23:21:12,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3223 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=1581, Invalid=12225, Unknown=0, NotChecked=0, Total=13806 [2020-10-13 23:21:12,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 23:21:12,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-13 23:21:12,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-13 23:21:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2020-10-13 23:21:12,436 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 80 [2020-10-13 23:21:12,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:12,436 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2020-10-13 23:21:12,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-13 23:21:12,436 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2020-10-13 23:21:12,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 23:21:12,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:12,437 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-10-13 23:21:12,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 23:21:12,438 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:12,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:12,438 INFO L82 PathProgramCache]: Analyzing trace with hash -519003275, now seen corresponding path program 15 times [2020-10-13 23:21:12,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:12,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555489639] [2020-10-13 23:21:12,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:12,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:12,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:12,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:17,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:17,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 23:21:17,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:21:17,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:21:17,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:17,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:17,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 23:21:17,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:17,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 23:21:17,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:17,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:17,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:17,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:17,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:17,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:17,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:21:17,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:17,730 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:17,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:17,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:17,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:17,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:17,737 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-13 23:21:17,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555489639] [2020-10-13 23:21:17,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:17,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 23:21:17,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276083453] [2020-10-13 23:21:17,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 23:21:17,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:17,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 23:21:17,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-13 23:21:17,740 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 18 states. [2020-10-13 23:21:18,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:21:18,966 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2020-10-13 23:21:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 23:21:18,968 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 82 [2020-10-13 23:21:18,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:21:18,968 INFO L225 Difference]: With dead ends: 138 [2020-10-13 23:21:18,969 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 23:21:18,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 23:21:18,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 23:21:18,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-13 23:21:18,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-13 23:21:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2020-10-13 23:21:18,979 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 82 [2020-10-13 23:21:18,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:21:18,979 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2020-10-13 23:21:18,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 23:21:18,980 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2020-10-13 23:21:18,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-13 23:21:18,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:21:18,980 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:21:18,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 23:21:18,981 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:21:18,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:21:18,981 INFO L82 PathProgramCache]: Analyzing trace with hash -813608339, now seen corresponding path program 16 times [2020-10-13 23:21:18,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:21:18,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743015178] [2020-10-13 23:21:18,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:21:19,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:19,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:19,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:22,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:24,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:24,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-13 23:21:24,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:21:24,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 23:21:24,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:24,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-13 23:21:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:21:24,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-13 23:21:24,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:25,310 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-10-13 23:21:25,480 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2020-10-13 23:21:25,665 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2020-10-13 23:21:25,859 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-10-13 23:21:26,074 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-13 23:21:26,310 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 40 [2020-10-13 23:21:26,569 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-13 23:21:26,835 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-13 23:21:27,142 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-10-13 23:21:27,485 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-10-13 23:21:27,843 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2020-10-13 23:21:28,213 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2020-10-13 23:21:28,540 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2020-10-13 23:21:28,875 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-10-13 23:21:29,209 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-10-13 23:21:29,505 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-10-13 23:21:29,830 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-13 23:21:30,172 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-13 23:21:30,506 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-13 23:21:30,854 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2020-10-13 23:21:31,144 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-13 23:21:38,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:21:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:21:38,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:21:38,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:21:38,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:21:38,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:21:38,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:21:38,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:21:38,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:21:38,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:21:38,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:21:38,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:21:38,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:21:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 23:21:38,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743015178] [2020-10-13 23:21:38,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:21:38,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-13 23:21:38,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044218099] [2020-10-13 23:21:38,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-13 23:21:38,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:21:38,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-13 23:21:38,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=4581, Unknown=0, NotChecked=0, Total=4830 [2020-10-13 23:21:38,266 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 70 states. [2020-10-13 23:21:39,177 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 108 [2020-10-13 23:21:41,128 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 29 [2020-10-13 23:21:41,606 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2020-10-13 23:21:42,175 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2020-10-13 23:21:42,714 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2020-10-13 23:21:43,268 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2020-10-13 23:21:43,853 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2020-10-13 23:21:44,447 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-13 23:21:45,074 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2020-10-13 23:21:45,646 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2020-10-13 23:21:46,207 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 41 [2020-10-13 23:21:47,128 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 37 [2020-10-13 23:21:47,653 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 36 [2020-10-13 23:21:48,795 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 41 [2020-10-13 23:21:49,119 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 34 [2020-10-13 23:21:50,322 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-13 23:21:50,962 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-10-13 23:21:51,656 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-13 23:21:52,296 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-10-13 23:21:52,954 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2020-10-13 23:21:53,573 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-13 23:21:54,133 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-10-13 23:21:54,649 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 28 [2020-10-13 23:21:55,177 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 28 [2020-10-13 23:21:55,697 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34 [2020-10-13 23:21:56,062 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 29 [2020-10-13 23:22:02,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:02,116 INFO L93 Difference]: Finished difference Result 169 states and 178 transitions. [2020-10-13 23:22:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-13 23:22:02,117 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 90 [2020-10-13 23:22:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:02,119 INFO L225 Difference]: With dead ends: 169 [2020-10-13 23:22:02,120 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 23:22:02,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1901 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=485, Invalid=10435, Unknown=0, NotChecked=0, Total=10920 [2020-10-13 23:22:02,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 23:22:02,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 128. [2020-10-13 23:22:02,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 23:22:02,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2020-10-13 23:22:02,143 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 90 [2020-10-13 23:22:02,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:02,144 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2020-10-13 23:22:02,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-13 23:22:02,144 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2020-10-13 23:22:02,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 23:22:02,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:02,145 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:02,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 23:22:02,145 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:02,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:02,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1763897291, now seen corresponding path program 17 times [2020-10-13 23:22:02,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:02,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685671634] [2020-10-13 23:22:02,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:02,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:02,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:02,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:07,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:07,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 23:22:07,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 23:22:07,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 23:22:07,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:07,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:07,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:22:07,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 23:22:07,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 23:22:07,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:22:07,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:07,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:07,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:07,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:07,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:07,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 23:22:07,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:07,628 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:07,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:07,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:07,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:07,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:22:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 23:22:07,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685671634] [2020-10-13 23:22:07,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:22:07,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:22:07,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346415340] [2020-10-13 23:22:07,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:22:07,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:07,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:22:07,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:22:07,642 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand 20 states. [2020-10-13 23:22:09,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:09,872 INFO L93 Difference]: Finished difference Result 239 states and 255 transitions. [2020-10-13 23:22:09,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 23:22:09,875 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2020-10-13 23:22:09,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:09,876 INFO L225 Difference]: With dead ends: 239 [2020-10-13 23:22:09,876 INFO L226 Difference]: Without dead ends: 165 [2020-10-13 23:22:09,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=323, Invalid=1083, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 23:22:09,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-13 23:22:09,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 134. [2020-10-13 23:22:09,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 23:22:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 141 transitions. [2020-10-13 23:22:09,900 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 141 transitions. Word has length 92 [2020-10-13 23:22:09,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:09,900 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 141 transitions. [2020-10-13 23:22:09,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:22:09,900 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 141 transitions. [2020-10-13 23:22:09,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 23:22:09,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:09,902 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:09,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 23:22:09,902 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:09,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:09,902 INFO L82 PathProgramCache]: Analyzing trace with hash 819773195, now seen corresponding path program 18 times [2020-10-13 23:22:09,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:09,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878647422] [2020-10-13 23:22:09,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:09,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:09,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:10,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:13,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:14,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:14,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 23:22:14,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 23:22:14,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 23:22:14,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:14,929 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:14,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 23:22:14,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:14,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 23:22:14,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:22:15,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:15,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:15,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:15,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:15,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:15,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:15,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:22:15,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:15,612 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:15,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:15,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:15,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:15,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:22:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 23:22:15,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878647422] [2020-10-13 23:22:15,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:22:15,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 23:22:15,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496914683] [2020-10-13 23:22:15,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 23:22:15,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:15,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 23:22:15,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-13 23:22:15,640 INFO L87 Difference]: Start difference. First operand 134 states and 141 transitions. Second operand 20 states. [2020-10-13 23:22:18,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 23:22:18,117 INFO L93 Difference]: Finished difference Result 231 states and 242 transitions. [2020-10-13 23:22:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 23:22:18,124 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 92 [2020-10-13 23:22:18,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 23:22:18,126 INFO L225 Difference]: With dead ends: 231 [2020-10-13 23:22:18,127 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 23:22:18,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-13 23:22:18,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 23:22:18,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2020-10-13 23:22:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 23:22:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2020-10-13 23:22:18,146 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2020-10-13 23:22:18,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 23:22:18,146 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2020-10-13 23:22:18,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 23:22:18,146 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2020-10-13 23:22:18,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-13 23:22:18,147 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 23:22:18,147 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 23:22:18,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 23:22:18,148 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 23:22:18,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 23:22:18,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1972050179, now seen corresponding path program 19 times [2020-10-13 23:22:18,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 23:22:18,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518418908] [2020-10-13 23:22:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 23:22:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:18,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:21,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:23,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:23,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 23:22:23,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 23:22:23,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 23:22:23,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:23,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:23,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-13 23:22:23,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 23:22:23,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-13 23:22:23,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:22:29,022 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 17 [2020-10-13 23:22:38,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 23:22:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 23:22:38,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 23:22:38,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 23:22:38,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 23:22:38,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 23:22:38,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 23:22:38,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-13 23:22:38,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-13 23:22:38,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 23:22:38,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 23:22:38,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 23:22:38,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 23:22:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-10-13 23:22:38,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518418908] [2020-10-13 23:22:38,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 23:22:38,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-13 23:22:38,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709525737] [2020-10-13 23:22:38,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-13 23:22:38,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 23:22:38,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-13 23:22:38,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=4255, Unknown=0, NotChecked=0, Total=4422 [2020-10-13 23:22:38,341 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 67 states.