/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/eureka_05.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 11:07:15,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 11:07:15,697 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 11:07:15,720 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 11:07:15,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 11:07:15,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 11:07:15,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 11:07:15,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 11:07:15,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 11:07:15,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 11:07:15,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 11:07:15,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 11:07:15,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 11:07:15,730 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 11:07:15,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 11:07:15,732 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 11:07:15,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 11:07:15,734 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 11:07:15,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 11:07:15,737 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 11:07:15,739 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 11:07:15,740 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 11:07:15,741 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 11:07:15,742 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 11:07:15,744 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 11:07:15,745 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 11:07:15,745 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 11:07:15,746 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 11:07:15,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 11:07:15,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 11:07:15,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 11:07:15,748 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 11:07:15,749 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 11:07:15,750 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 11:07:15,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 11:07:15,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 11:07:15,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 11:07:15,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 11:07:15,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 11:07:15,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 11:07:15,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 11:07:15,755 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 11:07:15,777 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 11:07:15,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 11:07:15,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 11:07:15,779 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 11:07:15,779 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 11:07:15,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 11:07:15,779 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 11:07:15,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 11:07:15,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 11:07:15,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 11:07:15,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 11:07:15,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 11:07:15,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 11:07:15,781 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 11:07:15,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 11:07:15,781 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 11:07:15,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 11:07:15,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 11:07:15,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 11:07:15,782 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 11:07:15,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 11:07:15,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:07:15,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 11:07:15,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 11:07:15,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 11:07:15,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 11:07:15,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 11:07:15,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 11:07:15,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 11:07:15,784 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 11:07:16,119 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 11:07:16,140 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 11:07:16,144 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 11:07:16,146 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 11:07:16,147 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 11:07:16,148 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_05.i [2020-10-13 11:07:16,225 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e9374572/29e9e00ddaa0408586bd45fc8d017b7c/FLAGb04c6c2eb [2020-10-13 11:07:16,647 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 11:07:16,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/eureka_05.i [2020-10-13 11:07:16,654 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e9374572/29e9e00ddaa0408586bd45fc8d017b7c/FLAGb04c6c2eb [2020-10-13 11:07:16,990 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5e9374572/29e9e00ddaa0408586bd45fc8d017b7c [2020-10-13 11:07:17,000 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 11:07:17,002 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 11:07:17,003 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 11:07:17,003 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 11:07:17,007 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 11:07:17,008 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:07:16" (1/1) ... [2020-10-13 11:07:17,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ea2dc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:17, skipping insertion in model container [2020-10-13 11:07:17,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:07:16" (1/1) ... [2020-10-13 11:07:17,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 11:07:17,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 11:07:17,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:07:17,297 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 11:07:17,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:07:17,345 INFO L208 MainTranslator]: Completed translation [2020-10-13 11:07:17,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:17 WrapperNode [2020-10-13 11:07:17,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 11:07:17,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 11:07:17,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 11:07:17,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 11:07:17,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:17" (1/1) ... [2020-10-13 11:07:17,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:17" (1/1) ... [2020-10-13 11:07:17,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:17" (1/1) ... [2020-10-13 11:07:17,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:17" (1/1) ... [2020-10-13 11:07:17,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:17" (1/1) ... [2020-10-13 11:07:17,550 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:17" (1/1) ... [2020-10-13 11:07:17,558 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:17" (1/1) ... [2020-10-13 11:07:17,564 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 11:07:17,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 11:07:17,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 11:07:17,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 11:07:17,565 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:17" (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 11:07:17,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 11:07:17,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 11:07:17,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 11:07:17,634 INFO L138 BoogieDeclarations]: Found implementation of procedure SelectionSort [2020-10-13 11:07:17,634 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 11:07:17,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 11:07:17,635 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 11:07:17,635 INFO L130 BoogieDeclarations]: Found specification of procedure SelectionSort [2020-10-13 11:07:17,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 11:07:17,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 11:07:17,635 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 11:07:17,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 11:07:17,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 11:07:17,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 11:07:17,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-13 11:07:17,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 11:07:17,892 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 11:07:17,893 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 11:07:17,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:07:17 BoogieIcfgContainer [2020-10-13 11:07:17,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 11:07:17,898 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 11:07:17,898 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 11:07:17,902 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 11:07:17,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:07:16" (1/3) ... [2020-10-13 11:07:17,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16996e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:07:17, skipping insertion in model container [2020-10-13 11:07:17,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:17" (2/3) ... [2020-10-13 11:07:17,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16996e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:07:17, skipping insertion in model container [2020-10-13 11:07:17,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:07:17" (3/3) ... [2020-10-13 11:07:17,906 INFO L109 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2020-10-13 11:07:17,921 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 11:07:17,929 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 11:07:17,948 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 11:07:17,998 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 11:07:17,998 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 11:07:17,999 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 11:07:17,999 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 11:07:17,999 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 11:07:17,999 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 11:07:17,999 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 11:07:17,999 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 11:07:18,021 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-13 11:07:18,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 11:07:18,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:18,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:18,031 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:18,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:18,038 INFO L82 PathProgramCache]: Analyzing trace with hash 625586084, now seen corresponding path program 1 times [2020-10-13 11:07:18,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:18,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406597737] [2020-10-13 11:07:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:18,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:18,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:18,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:18,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:07:18,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:07:18,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-13 11:07:18,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:18,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:18,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 11:07:18,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:18,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 11:07:18,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:18,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:18,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:18,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:18,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:18,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 11:07:18,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:18,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:18,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:18,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:18,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:18,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:07:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:18,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:18,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:18,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 11:07:18,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:18,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:07:18,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:18,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:18,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 11:07:18,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:18,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:18,502 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 11:07:18,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406597737] [2020-10-13 11:07:18,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:07:18,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 11:07:18,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694837573] [2020-10-13 11:07:18,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 11:07:18,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:18,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 11:07:18,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:07:18,529 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-10-13 11:07:18,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:18,731 INFO L93 Difference]: Finished difference Result 77 states and 109 transitions. [2020-10-13 11:07:18,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:07:18,733 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-13 11:07:18,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:18,745 INFO L225 Difference]: With dead ends: 77 [2020-10-13 11:07:18,745 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 11:07:18,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:07:18,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 11:07:18,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 29. [2020-10-13 11:07:18,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 11:07:18,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-13 11:07:18,798 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2020-10-13 11:07:18,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:18,798 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-13 11:07:18,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 11:07:18,799 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-13 11:07:18,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-13 11:07:18,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:18,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:18,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 11:07:18,800 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:18,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:18,801 INFO L82 PathProgramCache]: Analyzing trace with hash 2087778385, now seen corresponding path program 1 times [2020-10-13 11:07:18,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:18,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562046411] [2020-10-13 11:07:18,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:18,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:18,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:19,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:19,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:07:19,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:07:19,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 230 [2020-10-13 11:07:19,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:19,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:07:19,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:07:19,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:07:19,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:19,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:19,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:19,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:19,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:19,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:19,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 11:07:19,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:19,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:19,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:19,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:19,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:19,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-13 11:07:19,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:19,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:19,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:19,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 11:07:19,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:19,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:07:19,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:19,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:19,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 11:07:19,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:19,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:19,169 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 11:07:19,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562046411] [2020-10-13 11:07:19,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:07:19,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 11:07:19,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752928857] [2020-10-13 11:07:19,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:07:19,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:19,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:07:19,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:07:19,176 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2020-10-13 11:07:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:19,365 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2020-10-13 11:07:19,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:07:19,366 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-13 11:07:19,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:19,367 INFO L225 Difference]: With dead ends: 59 [2020-10-13 11:07:19,367 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 11:07:19,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 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 11:07:19,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 11:07:19,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2020-10-13 11:07:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 11:07:19,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-13 11:07:19,386 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2020-10-13 11:07:19,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:19,387 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-13 11:07:19,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:07:19,387 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-13 11:07:19,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 11:07:19,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:19,389 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 11:07:19,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 11:07:19,390 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:19,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:19,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1482156659, now seen corresponding path program 1 times [2020-10-13 11:07:19,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:19,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033725642] [2020-10-13 11:07:19,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:19,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:19,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:19,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:19,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:19,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 11:07:19,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:07:19,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-10-13 11:07:19,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:19,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:07:19,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:07:19,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 11:07:19,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:19,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:19,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:19,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:19,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:19,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:19,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:07:19,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:19,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:19,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:19,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:19,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:19,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-13 11:07:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:19,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:19,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:19,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 11:07:19,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:19,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:07:19,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:19,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:19,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 11:07:19,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:19,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:19,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033725642] [2020-10-13 11:07:19,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:19,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 11:07:19,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652313579] [2020-10-13 11:07:19,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:07:19,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:19,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:07:19,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:07:19,910 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-10-13 11:07:20,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:20,072 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2020-10-13 11:07:20,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:07:20,073 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-13 11:07:20,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:20,074 INFO L225 Difference]: With dead ends: 61 [2020-10-13 11:07:20,074 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 11:07:20,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:07:20,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 11:07:20,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2020-10-13 11:07:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 11:07:20,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-13 11:07:20,083 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 20 [2020-10-13 11:07:20,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:20,083 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-13 11:07:20,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:07:20,084 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-13 11:07:20,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 11:07:20,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:20,085 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:20,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 11:07:20,086 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:20,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:20,086 INFO L82 PathProgramCache]: Analyzing trace with hash -699737067, now seen corresponding path program 2 times [2020-10-13 11:07:20,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:20,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512902240] [2020-10-13 11:07:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:20,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:20,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:20,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:20,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:20,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 11:07:20,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:07:20,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 463 [2020-10-13 11:07:20,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:20,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:07:20,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:07:20,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 11:07:20,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:20,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:20,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:20,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:20,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:20,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:20,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:07:20,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:20,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:20,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:20,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:20,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:20,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-13 11:07:20,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:20,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:20,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:20,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 11:07:20,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:20,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:07:20,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:20,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:20,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 11:07:20,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:20,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:20,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:20,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512902240] [2020-10-13 11:07:20,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:20,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:07:20,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737810960] [2020-10-13 11:07:20,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:07:20,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:20,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:07:20,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:07:20,633 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 7 states. [2020-10-13 11:07:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:20,793 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2020-10-13 11:07:20,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 11:07:20,793 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-13 11:07:20,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:20,794 INFO L225 Difference]: With dead ends: 63 [2020-10-13 11:07:20,795 INFO L226 Difference]: Without dead ends: 42 [2020-10-13 11:07:20,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:07:20,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-13 11:07:20,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2020-10-13 11:07:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 11:07:20,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-10-13 11:07:20,802 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 22 [2020-10-13 11:07:20,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:20,803 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-10-13 11:07:20,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:07:20,803 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-10-13 11:07:20,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 11:07:20,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:20,804 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:20,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 11:07:20,804 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:20,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:20,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1555567305, now seen corresponding path program 3 times [2020-10-13 11:07:20,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:20,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862013323] [2020-10-13 11:07:20,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:20,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:20,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:20,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:21,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:21,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 11:07:21,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:07:21,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-13 11:07:21,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:21,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:07:21,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:07:21,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:07:21,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:21,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:21,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:21,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:21,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:21,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:21,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:21,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 11:07:21,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:21,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:21,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:21,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:21,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:21,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-13 11:07:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:21,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:21,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:21,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 11:07:21,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:21,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:07:21,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:21,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:21,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 11:07:21,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:21,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:21,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862013323] [2020-10-13 11:07:21,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:21,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 11:07:21,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991626295] [2020-10-13 11:07:21,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 11:07:21,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:21,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 11:07:21,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:07:21,516 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 8 states. [2020-10-13 11:07:21,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:21,714 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-10-13 11:07:21,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 11:07:21,714 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-13 11:07:21,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:21,715 INFO L225 Difference]: With dead ends: 65 [2020-10-13 11:07:21,715 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 11:07:21,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:07:21,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 11:07:21,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2020-10-13 11:07:21,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 11:07:21,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-10-13 11:07:21,723 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2020-10-13 11:07:21,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:21,723 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-10-13 11:07:21,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 11:07:21,723 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-10-13 11:07:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 11:07:21,724 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:21,724 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:21,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 11:07:21,725 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:21,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:21,725 INFO L82 PathProgramCache]: Analyzing trace with hash 625294809, now seen corresponding path program 4 times [2020-10-13 11:07:21,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:21,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49797590] [2020-10-13 11:07:21,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:21,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:21,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:21,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:22,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:22,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 11:07:22,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:07:22,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 780 [2020-10-13 11:07:22,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:22,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:07:22,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:07:22,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 11:07:22,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:22,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:22,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:22,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:22,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:22,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:22,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:07:22,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:22,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:22,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:22,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:22,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:22,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-13 11:07:22,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:22,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:22,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:22,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 11:07:22,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:22,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:07:22,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:22,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:22,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 11:07:22,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:22,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:22,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49797590] [2020-10-13 11:07:22,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:22,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:07:22,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288109022] [2020-10-13 11:07:22,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:07:22,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:22,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:07:22,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:07:22,624 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 9 states. [2020-10-13 11:07:22,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:22,930 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2020-10-13 11:07:22,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 11:07:22,931 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-13 11:07:22,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:22,932 INFO L225 Difference]: With dead ends: 82 [2020-10-13 11:07:22,932 INFO L226 Difference]: Without dead ends: 61 [2020-10-13 11:07:22,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:07:22,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-13 11:07:22,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 38. [2020-10-13 11:07:22,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 11:07:22,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-13 11:07:22,940 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 26 [2020-10-13 11:07:22,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:22,940 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-13 11:07:22,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:07:22,941 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-13 11:07:22,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 11:07:22,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:22,942 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:22,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 11:07:22,942 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:22,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:22,943 INFO L82 PathProgramCache]: Analyzing trace with hash 489745915, now seen corresponding path program 5 times [2020-10-13 11:07:22,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:22,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237727603] [2020-10-13 11:07:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:22,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:22,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:22,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:23,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:23,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:23,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 11:07:23,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:07:23,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 926 [2020-10-13 11:07:23,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:23,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:07:23,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 11:07:23,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:07:23,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:24,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:24,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:24,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:24,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:24,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:24,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:07:24,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:24,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:24,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:24,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:24,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:24,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:07:24,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:24,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:24,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:24,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 11:07:24,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:24,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 11:07:24,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:24,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:07:24,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 11:07:24,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:07:24,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:24,066 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 11:07:24,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237727603] [2020-10-13 11:07:24,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:07:24,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-13 11:07:24,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447469019] [2020-10-13 11:07:24,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:07:24,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:24,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:07:24,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:07:24,069 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 11 states. [2020-10-13 11:07:24,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:24,454 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-13 11:07:24,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 11:07:24,455 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-10-13 11:07:24,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:24,456 INFO L225 Difference]: With dead ends: 60 [2020-10-13 11:07:24,456 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 11:07:24,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:07:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 11:07:24,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2020-10-13 11:07:24,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 11:07:24,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-13 11:07:24,465 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 28 [2020-10-13 11:07:24,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:24,466 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-13 11:07:24,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:07:24,466 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-13 11:07:24,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 11:07:24,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:24,467 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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 11:07:24,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 11:07:24,468 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:24,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:24,468 INFO L82 PathProgramCache]: Analyzing trace with hash 541138195, now seen corresponding path program 1 times [2020-10-13 11:07:24,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:24,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835457129] [2020-10-13 11:07:24,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:24,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:24,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:24,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:24,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:25,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:25,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:27,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:27,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 11:07:27,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 11:07:27,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3213 [2020-10-13 11:07:27,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:27,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 11:07:27,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 11:07:27,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:07:27,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:27,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:27,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:27,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:27,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:27,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:27,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:07:27,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:27,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:27,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:27,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:27,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:27,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:07:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:27,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:27,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:27,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 11:07:27,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:27,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-13 11:07:27,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:27,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:07:27,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 11:07:27,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 11:07:27,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-13 11:07:27,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835457129] [2020-10-13 11:07:27,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:07:27,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 11:07:27,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776988396] [2020-10-13 11:07:27,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 11:07:27,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:27,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 11:07:27,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:07:27,992 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 12 states. [2020-10-13 11:07:28,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:28,645 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2020-10-13 11:07:28,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 11:07:28,646 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-13 11:07:28,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:28,647 INFO L225 Difference]: With dead ends: 75 [2020-10-13 11:07:28,648 INFO L226 Difference]: Without dead ends: 73 [2020-10-13 11:07:28,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:07:28,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-13 11:07:28,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-13 11:07:28,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-13 11:07:28,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2020-10-13 11:07:28,660 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 32 [2020-10-13 11:07:28,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:28,660 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2020-10-13 11:07:28,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 11:07:28,660 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2020-10-13 11:07:28,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 11:07:28,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:28,662 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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 11:07:28,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 11:07:28,662 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:28,663 INFO L82 PathProgramCache]: Analyzing trace with hash -2067934930, now seen corresponding path program 1 times [2020-10-13 11:07:28,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:28,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162404262] [2020-10-13 11:07:28,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:28,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:28,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:28,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:28,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:30,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:30,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-13 11:07:30,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:07:30,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1858 [2020-10-13 11:07:30,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:30,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:07:30,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:07:30,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:07:30,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:30,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:30,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:30,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:30,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:30,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:30,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 11:07:30,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:30,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:07:30,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:30,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:07:30,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:30,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:07:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:30,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:30,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:30,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 11:07:30,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:30,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:07:30,596 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:30,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:07:30,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:07:30,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 11:07:30,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:30,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-13 11:07:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:30,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:30,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:30,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 11:07:30,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:30,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:07:30,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:30,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:30,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 11:07:30,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:30,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:30,621 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 11:07:30,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162404262] [2020-10-13 11:07:30,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:07:30,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 11:07:30,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869232107] [2020-10-13 11:07:30,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:07:30,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:30,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:07:30,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:07:30,623 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 7 states. [2020-10-13 11:07:30,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:30,839 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-10-13 11:07:30,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 11:07:30,840 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-13 11:07:30,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:30,841 INFO L225 Difference]: With dead ends: 83 [2020-10-13 11:07:30,841 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 11:07:30,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:07:30,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 11:07:30,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 54. [2020-10-13 11:07:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 11:07:30,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2020-10-13 11:07:30,850 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 36 [2020-10-13 11:07:30,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:30,851 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2020-10-13 11:07:30,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:07:30,851 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2020-10-13 11:07:30,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 11:07:30,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:30,852 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:30,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 11:07:30,853 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:30,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:30,853 INFO L82 PathProgramCache]: Analyzing trace with hash -175519861, now seen corresponding path program 1 times [2020-10-13 11:07:30,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:30,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029605835] [2020-10-13 11:07:30,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:30,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:30,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:30,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:31,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:31,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:32,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:32,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:32,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:32,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:32,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:32,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:33,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:33,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:35,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:35,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:35,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:35,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:35,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 11:07:35,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 11:07:35,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:07:35,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:35,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:07:35,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 11:07:35,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:07:35,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:35,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:35,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:35,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:35,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:35,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:35,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:07:35,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:35,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:35,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:35,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:35,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:35,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:07:35,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:35,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:35,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:35,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-13 11:07:35,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:35,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 11:07:35,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:35,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:07:35,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 11:07:35,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:07:35,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 11:07:35,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029605835] [2020-10-13 11:07:35,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:35,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:07:35,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994150253] [2020-10-13 11:07:35,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:07:35,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:35,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:07:35,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:07:35,957 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand 7 states. [2020-10-13 11:07:36,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:36,237 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2020-10-13 11:07:36,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 11:07:36,238 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-13 11:07:36,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:36,239 INFO L225 Difference]: With dead ends: 94 [2020-10-13 11:07:36,239 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 11:07:36,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:07:36,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 11:07:36,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2020-10-13 11:07:36,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-13 11:07:36,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2020-10-13 11:07:36,261 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 35 [2020-10-13 11:07:36,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:36,264 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2020-10-13 11:07:36,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:07:36,264 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2020-10-13 11:07:36,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-13 11:07:36,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:36,266 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:36,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 11:07:36,268 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:36,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:36,268 INFO L82 PathProgramCache]: Analyzing trace with hash -291936186, now seen corresponding path program 1 times [2020-10-13 11:07:36,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:36,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876458194] [2020-10-13 11:07:36,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:36,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:36,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:36,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:36,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:36,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:36,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:36,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:37,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:41,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:41,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 11:07:41,280 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 11:07:41,280 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:07:41,280 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:41,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:07:41,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:07:41,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:07:41,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:41,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:41,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:41,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:41,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:41,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:41,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:07:41,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:41,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:07:41,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:41,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:07:41,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:41,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:07:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:41,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:41,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:41,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:41,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-13 11:07:41,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 11:07:41,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-13 11:07:41,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:41,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:07:41,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:07:41,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:07:41,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:41,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-13 11:07:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:41,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:41,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:41,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 11:07:41,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:41,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:07:41,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:41,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:41,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 11:07:41,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:41,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 11:07:41,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876458194] [2020-10-13 11:07:41,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:41,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 11:07:41,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179652210] [2020-10-13 11:07:41,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 11:07:41,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:41,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 11:07:41,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:07:41,404 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 8 states. [2020-10-13 11:07:41,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:41,664 INFO L93 Difference]: Finished difference Result 113 states and 134 transitions. [2020-10-13 11:07:41,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 11:07:41,665 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-10-13 11:07:41,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:41,666 INFO L225 Difference]: With dead ends: 113 [2020-10-13 11:07:41,666 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 11:07:41,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-13 11:07:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 11:07:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 62. [2020-10-13 11:07:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 11:07:41,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-10-13 11:07:41,679 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 40 [2020-10-13 11:07:41,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:41,681 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-10-13 11:07:41,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 11:07:41,681 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-10-13 11:07:41,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 11:07:41,683 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:41,683 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:41,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 11:07:41,684 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:41,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:41,684 INFO L82 PathProgramCache]: Analyzing trace with hash 108179107, now seen corresponding path program 2 times [2020-10-13 11:07:41,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:41,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096163280] [2020-10-13 11:07:41,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:41,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:41,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:41,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:41,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:41,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:42,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:42,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:43,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:44,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:44,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:45,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:45,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:45,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:45,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:45,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:45,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:45,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:45,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:46,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:46,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:46,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:46,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 11:07:46,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 11:07:46,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 11:07:46,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:46,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:07:46,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:07:46,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:07:46,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:46,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:46,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:46,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:46,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:46,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:46,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:07:46,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:46,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:07:46,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:46,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:07:46,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:46,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:07:46,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:46,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:46,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:46,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:07:46,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:46,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-13 11:07:46,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:46,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:07:46,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 11:07:46,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:07:46,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:47,080 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-13 11:07:47,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096163280] [2020-10-13 11:07:47,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:47,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:07:47,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89025451] [2020-10-13 11:07:47,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 11:07:47,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:47,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 11:07:47,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:07:47,083 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 12 states. [2020-10-13 11:07:47,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:47,681 INFO L93 Difference]: Finished difference Result 109 states and 133 transitions. [2020-10-13 11:07:47,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 11:07:47,681 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-13 11:07:47,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:47,682 INFO L225 Difference]: With dead ends: 109 [2020-10-13 11:07:47,682 INFO L226 Difference]: Without dead ends: 86 [2020-10-13 11:07:47,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:07:47,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-13 11:07:47,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-13 11:07:47,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 11:07:47,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2020-10-13 11:07:47,693 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 39 [2020-10-13 11:07:47,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:47,694 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2020-10-13 11:07:47,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 11:07:47,694 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2020-10-13 11:07:47,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 11:07:47,695 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:47,695 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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 11:07:47,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 11:07:47,695 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:47,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:47,696 INFO L82 PathProgramCache]: Analyzing trace with hash -2102020051, now seen corresponding path program 1 times [2020-10-13 11:07:47,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:47,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070844839] [2020-10-13 11:07:47,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:47,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:47,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:47,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:47,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:48,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:48,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:48,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:48,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:48,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:48,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:50,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:50,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:50,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:51,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:51,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:52,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:52,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:52,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:52,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 11:07:52,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 11:07:52,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:07:52,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:52,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:07:52,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 11:07:52,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 11:07:52,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:52,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:52,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:52,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:52,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:52,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:52,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:07:52,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:52,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:52,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:52,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:52,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:52,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:07:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:52,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:52,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:52,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:52,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:52,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:52,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-13 11:07:52,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:07:52,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-13 11:07:52,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:52,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:07:52,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 11:07:52,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 11:07:52,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 11:07:52,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070844839] [2020-10-13 11:07:52,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:52,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:07:52,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416438018] [2020-10-13 11:07:52,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:07:52,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:52,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:07:52,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:07:52,946 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand 9 states. [2020-10-13 11:07:53,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:53,482 INFO L93 Difference]: Finished difference Result 134 states and 163 transitions. [2020-10-13 11:07:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 11:07:53,482 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-13 11:07:53,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:53,483 INFO L225 Difference]: With dead ends: 134 [2020-10-13 11:07:53,483 INFO L226 Difference]: Without dead ends: 92 [2020-10-13 11:07:53,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:07:53,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-13 11:07:53,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2020-10-13 11:07:53,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 11:07:53,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 92 transitions. [2020-10-13 11:07:53,496 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 92 transitions. Word has length 42 [2020-10-13 11:07:53,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:53,497 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 92 transitions. [2020-10-13 11:07:53,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:07:53,497 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 92 transitions. [2020-10-13 11:07:53,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 11:07:53,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:53,498 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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 11:07:53,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 11:07:53,498 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:53,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:53,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1143190366, now seen corresponding path program 2 times [2020-10-13 11:07:53,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:53,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781870828] [2020-10-13 11:07:53,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:53,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:53,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:53,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:53,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:53,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:53,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:53,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:53,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:55,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:56,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:58,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:58,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 11:07:58,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 11:07:58,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:07:58,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:58,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:07:58,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 11:07:58,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 11:07:58,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:58,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:58,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:58,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:58,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:58,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:58,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:07:58,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:58,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:58,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:58,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:58,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:58,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:07:58,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:58,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:58,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:58,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-13 11:07:58,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:58,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 11:07:58,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:58,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:07:58,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 11:07:58,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 11:07:58,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:58,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-13 11:07:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:58,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:58,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:58,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 11:07:58,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:58,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 11:07:58,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:58,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:58,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 11:07:58,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:58,596 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 11:07:58,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781870828] [2020-10-13 11:07:58,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:07:58,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 11:07:58,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850060736] [2020-10-13 11:07:58,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:07:58,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:58,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:07:58,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:07:58,601 INFO L87 Difference]: Start difference. First operand 78 states and 92 transitions. Second operand 7 states. [2020-10-13 11:07:58,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:58,859 INFO L93 Difference]: Finished difference Result 148 states and 179 transitions. [2020-10-13 11:07:58,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 11:07:58,860 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 44 [2020-10-13 11:07:58,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:58,861 INFO L225 Difference]: With dead ends: 148 [2020-10-13 11:07:58,861 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 11:07:58,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:07:58,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 11:07:58,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2020-10-13 11:07:58,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 11:07:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2020-10-13 11:07:58,882 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 44 [2020-10-13 11:07:58,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:58,882 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2020-10-13 11:07:58,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:07:58,882 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2020-10-13 11:07:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 11:07:58,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:58,883 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:58,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 11:07:58,884 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:58,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:58,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1088098324, now seen corresponding path program 1 times [2020-10-13 11:07:58,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:58,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544940373] [2020-10-13 11:07:58,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:58,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:58,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:58,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:59,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:59,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:59,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:59,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:00,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:00,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:03,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:03,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:08:03,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 11:08:03,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 11:08:03,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:03,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:08:03,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:08:03,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 11:08:03,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:03,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:03,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:03,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:03,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:03,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:03,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:08:03,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:03,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:08:03,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:03,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:08:03,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:03,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:08:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:03,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:03,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:03,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:04,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:04,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-13 11:08:04,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:08:04,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-13 11:08:04,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:04,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:08:04,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:04,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:08:04,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:04,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-13 11:08:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:04,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:04,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:04,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 11:08:04,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:04,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:08:04,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:04,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:04,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-13 11:08:04,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:04,124 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:04,129 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 11:08:04,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544940373] [2020-10-13 11:08:04,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:04,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:08:04,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727476999] [2020-10-13 11:08:04,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:08:04,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:04,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:08:04,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:08:04,132 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand 9 states. [2020-10-13 11:08:04,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:04,499 INFO L93 Difference]: Finished difference Result 172 states and 207 transitions. [2020-10-13 11:08:04,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 11:08:04,499 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-13 11:08:04,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:04,500 INFO L225 Difference]: With dead ends: 172 [2020-10-13 11:08:04,500 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 11:08:04,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:08:04,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 11:08:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 78. [2020-10-13 11:08:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 11:08:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2020-10-13 11:08:04,514 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 47 [2020-10-13 11:08:04,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:04,514 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2020-10-13 11:08:04,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:08:04,514 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2020-10-13 11:08:04,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 11:08:04,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:04,515 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 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 11:08:04,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 11:08:04,515 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:04,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:04,516 INFO L82 PathProgramCache]: Analyzing trace with hash -124398315, now seen corresponding path program 2 times [2020-10-13 11:08:04,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:04,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395422045] [2020-10-13 11:08:04,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:04,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:04,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:04,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:04,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:04,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:04,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:04,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:04,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:04,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:05,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:05,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:05,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:05,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:05,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:05,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:05,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:06,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:06,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:09,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 11:08:09,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 11:08:09,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:08:09,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:09,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:08:09,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 11:08:09,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:08:09,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:09,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:09,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:09,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:09,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:09,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:08:09,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:09,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:09,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:09,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:09,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:09,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:08:09,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:09,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:09,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 11:08:09,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 11:08:09,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 274 [2020-10-13 11:08:09,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:09,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:08:09,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 11:08:09,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:08:09,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:09,888 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-13 11:08:09,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395422045] [2020-10-13 11:08:09,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:09,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:08:09,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396797247] [2020-10-13 11:08:09,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 11:08:09,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:09,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 11:08:09,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:08:09,890 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand 9 states. [2020-10-13 11:08:10,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:10,339 INFO L93 Difference]: Finished difference Result 155 states and 184 transitions. [2020-10-13 11:08:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 11:08:10,339 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 46 [2020-10-13 11:08:10,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:10,341 INFO L225 Difference]: With dead ends: 155 [2020-10-13 11:08:10,341 INFO L226 Difference]: Without dead ends: 95 [2020-10-13 11:08:10,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:08:10,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-13 11:08:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-13 11:08:10,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 11:08:10,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2020-10-13 11:08:10,361 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 46 [2020-10-13 11:08:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:10,361 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2020-10-13 11:08:10,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 11:08:10,361 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2020-10-13 11:08:10,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 11:08:10,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:10,362 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:10,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 11:08:10,363 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:10,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:10,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1668791735, now seen corresponding path program 3 times [2020-10-13 11:08:10,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:10,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253622549] [2020-10-13 11:08:10,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:10,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:10,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:10,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:10,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:12,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:12,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:12,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:15,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:15,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:15,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:08:15,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 11:08:15,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 11:08:15,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:15,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:08:15,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:08:15,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 11:08:15,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:15,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:15,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:15,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:15,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:15,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:15,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:15,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:08:15,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:15,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:08:15,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:15,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:08:15,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:15,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:08:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:15,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:15,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:15,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:15,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:15,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:15,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:15,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:15,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:16,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:16,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 11:08:16,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 11:08:16,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 884 [2020-10-13 11:08:16,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:16,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:08:16,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 11:08:16,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 11:08:16,412 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 33 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 11:08:16,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253622549] [2020-10-13 11:08:16,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:16,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 11:08:16,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344693961] [2020-10-13 11:08:16,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 11:08:16,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:16,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 11:08:16,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:08:16,826 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 17 states. [2020-10-13 11:08:17,226 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 50 [2020-10-13 11:08:17,359 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 48 [2020-10-13 11:08:17,604 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2020-10-13 11:08:18,100 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-13 11:08:19,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:19,202 INFO L93 Difference]: Finished difference Result 152 states and 181 transitions. [2020-10-13 11:08:19,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 11:08:19,202 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-13 11:08:19,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:19,203 INFO L225 Difference]: With dead ends: 152 [2020-10-13 11:08:19,204 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 11:08:19,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=377, Invalid=1603, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 11:08:19,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 11:08:19,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 92. [2020-10-13 11:08:19,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 11:08:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2020-10-13 11:08:19,221 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 49 [2020-10-13 11:08:19,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:19,222 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2020-10-13 11:08:19,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 11:08:19,222 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2020-10-13 11:08:19,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 11:08:19,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:19,223 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:19,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 11:08:19,223 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:19,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:19,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1528243125, now seen corresponding path program 4 times [2020-10-13 11:08:19,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:19,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598238968] [2020-10-13 11:08:19,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:19,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:19,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:19,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:19,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:19,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:19,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:19,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:19,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:19,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:19,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:19,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:20,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:21,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:21,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:21,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:21,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:24,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:24,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:08:24,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 11:08:24,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 11:08:24,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:24,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:08:24,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:08:24,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 11:08:24,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:24,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:24,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:24,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:24,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:24,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:24,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:08:24,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:24,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:08:24,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:24,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:08:24,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:24,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:08:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:24,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:24,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:24,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:24,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:25,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:25,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 11:08:25,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:08:25,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 911 [2020-10-13 11:08:25,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:25,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:08:25,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:08:25,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 11:08:25,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-13 11:08:25,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598238968] [2020-10-13 11:08:25,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:25,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 11:08:25,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296116575] [2020-10-13 11:08:25,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 11:08:25,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:25,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 11:08:25,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:08:25,238 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand 10 states. [2020-10-13 11:08:25,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:25,618 INFO L93 Difference]: Finished difference Result 172 states and 201 transitions. [2020-10-13 11:08:25,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 11:08:25,619 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-10-13 11:08:25,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:25,620 INFO L225 Difference]: With dead ends: 172 [2020-10-13 11:08:25,620 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 11:08:25,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:08:25,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 11:08:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 95. [2020-10-13 11:08:25,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-13 11:08:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 109 transitions. [2020-10-13 11:08:25,637 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 109 transitions. Word has length 49 [2020-10-13 11:08:25,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:25,637 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 109 transitions. [2020-10-13 11:08:25,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 11:08:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 109 transitions. [2020-10-13 11:08:25,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 11:08:25,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:25,638 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:25,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 11:08:25,638 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:25,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:25,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1291475093, now seen corresponding path program 5 times [2020-10-13 11:08:25,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:25,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234829230] [2020-10-13 11:08:25,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:25,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:25,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:25,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:25,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:25,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:26,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:26,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:28,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:28,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:28,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:28,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:28,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:29,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:29,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:30,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:30,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:30,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 11:08:30,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 11:08:30,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 11:08:30,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:30,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:08:30,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-13 11:08:30,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:08:30,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:30,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:30,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:30,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:30,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:30,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:30,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:08:30,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:30,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:30,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:30,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:30,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:30,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:08:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:30,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:30,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:30,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:30,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:30,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:30,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:31,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:31,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:31,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:31,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:31,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:31,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:31,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:31,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:31,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:31,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:31,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:31,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:32,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:35,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:35,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 11:08:35,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 11:08:35,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4475 [2020-10-13 11:08:35,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:35,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:08:35,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-10-13 11:08:35,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 11:08:35,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 11:08:35,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234829230] [2020-10-13 11:08:35,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:35,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 11:08:35,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191437060] [2020-10-13 11:08:35,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 11:08:35,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:35,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 11:08:35,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2020-10-13 11:08:35,718 INFO L87 Difference]: Start difference. First operand 95 states and 109 transitions. Second operand 20 states. [2020-10-13 11:08:38,067 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-10-13 11:08:38,539 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-13 11:08:38,699 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-13 11:08:39,529 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-13 11:08:39,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:39,952 INFO L93 Difference]: Finished difference Result 164 states and 195 transitions. [2020-10-13 11:08:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-13 11:08:39,952 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-13 11:08:39,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:39,955 INFO L225 Difference]: With dead ends: 164 [2020-10-13 11:08:39,955 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 11:08:39,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=618, Invalid=3414, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 11:08:39,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 11:08:39,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 109. [2020-10-13 11:08:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-13 11:08:39,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2020-10-13 11:08:39,974 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 52 [2020-10-13 11:08:39,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:39,974 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2020-10-13 11:08:39,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 11:08:39,974 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2020-10-13 11:08:39,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 11:08:39,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:39,975 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:39,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 11:08:39,976 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:39,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:39,976 INFO L82 PathProgramCache]: Analyzing trace with hash -702669613, now seen corresponding path program 6 times [2020-10-13 11:08:39,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:39,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017790862] [2020-10-13 11:08:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:39,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:39,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:40,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:40,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:40,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:40,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:40,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:41,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:41,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:41,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:41,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:41,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:41,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:42,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:42,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:42,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:42,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:42,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:43,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:43,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:43,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:44,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:44,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:44,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:44,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 11:08:44,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-13 11:08:44,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:08:44,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:44,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:08:44,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 11:08:44,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:08:44,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:45,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:45,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:45,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:45,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:45,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:08:45,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:45,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:45,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:45,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:45,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:45,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:08:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:45,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:45,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:46,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:46,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:46,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:46,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:47,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:50,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:50,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 11:08:50,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 11:08:50,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:08:50,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:50,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:08:50,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 11:08:50,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 11:08:50,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:50,471 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-10-13 11:08:50,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017790862] [2020-10-13 11:08:50,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:50,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 11:08:50,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041906708] [2020-10-13 11:08:50,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 11:08:50,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:50,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 11:08:50,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-13 11:08:50,473 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand 16 states. [2020-10-13 11:08:51,221 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 69 [2020-10-13 11:08:52,464 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-13 11:08:52,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:52,692 INFO L93 Difference]: Finished difference Result 242 states and 311 transitions. [2020-10-13 11:08:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 11:08:52,693 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 52 [2020-10-13 11:08:52,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:52,695 INFO L225 Difference]: With dead ends: 242 [2020-10-13 11:08:52,695 INFO L226 Difference]: Without dead ends: 198 [2020-10-13 11:08:52,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=215, Invalid=1345, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 11:08:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-13 11:08:52,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 137. [2020-10-13 11:08:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 11:08:52,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 167 transitions. [2020-10-13 11:08:52,717 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 167 transitions. Word has length 52 [2020-10-13 11:08:52,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:52,717 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 167 transitions. [2020-10-13 11:08:52,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 11:08:52,717 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 167 transitions. [2020-10-13 11:08:52,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 11:08:52,718 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:52,718 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:52,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 11:08:52,719 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:52,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:52,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1432023703, now seen corresponding path program 7 times [2020-10-13 11:08:52,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:52,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159570674] [2020-10-13 11:08:52,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:52,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:52,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:52,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:52,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:54,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:54,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:54,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:54,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:54,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:54,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:54,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:54,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:54,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:55,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:55,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:55,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:55,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:56,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:56,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:56,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:57,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:57,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 11:08:57,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 11:08:57,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:08:57,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:57,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:08:57,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 11:08:57,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:08:57,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:57,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:57,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:57,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:57,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:57,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:57,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:08:57,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:57,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:57,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:57,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:57,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:57,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:08:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:57,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:57,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:57,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:57,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:57,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:57,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:57,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:58,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:58,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:59,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:59,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-13 11:08:59,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 11:08:59,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1460 [2020-10-13 11:08:59,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:59,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:08:59,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 11:08:59,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 11:08:59,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-13 11:08:59,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159570674] [2020-10-13 11:08:59,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:59,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:08:59,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185674845] [2020-10-13 11:08:59,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:08:59,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:59,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:08:59,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:08:59,283 INFO L87 Difference]: Start difference. First operand 137 states and 167 transitions. Second operand 11 states. [2020-10-13 11:09:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:00,252 INFO L93 Difference]: Finished difference Result 228 states and 281 transitions. [2020-10-13 11:09:00,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 11:09:00,253 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-13 11:09:00,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:00,255 INFO L225 Difference]: With dead ends: 228 [2020-10-13 11:09:00,255 INFO L226 Difference]: Without dead ends: 192 [2020-10-13 11:09:00,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-10-13 11:09:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-13 11:09:00,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 130. [2020-10-13 11:09:00,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-13 11:09:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 155 transitions. [2020-10-13 11:09:00,285 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 155 transitions. Word has length 52 [2020-10-13 11:09:00,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:00,286 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 155 transitions. [2020-10-13 11:09:00,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:09:00,286 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 155 transitions. [2020-10-13 11:09:00,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 11:09:00,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:00,287 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:00,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 11:09:00,287 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:00,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:00,288 INFO L82 PathProgramCache]: Analyzing trace with hash 134437691, now seen corresponding path program 8 times [2020-10-13 11:09:00,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:00,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318842862] [2020-10-13 11:09:00,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:00,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:00,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:00,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:00,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:00,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:00,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:01,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:01,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:01,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:02,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:02,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:05,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:06,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:06,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 11:09:06,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 11:09:06,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5715 [2020-10-13 11:09:06,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:06,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:09:06,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:09:06,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 11:09:06,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:06,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:06,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:06,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:06,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:06,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:06,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:09:06,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:06,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:09:06,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:06,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:09:06,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:06,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:09:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:06,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:06,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:06,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:06,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:06,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:06,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:07,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:07,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:07,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:08,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:08,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:08,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:08,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:08,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:09,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:09,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:09,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:09,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:09,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:09,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:09,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:09,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:09,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:10,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:11,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:11,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 11:09:11,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-13 11:09:11,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 11:09:11,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:11,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 11:09:11,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 11:09:11,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:09:11,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:11,552 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 50 proven. 40 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 11:09:11,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318842862] [2020-10-13 11:09:11,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:11,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 11:09:11,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310296116] [2020-10-13 11:09:11,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 11:09:11,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:11,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 11:09:11,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2020-10-13 11:09:11,554 INFO L87 Difference]: Start difference. First operand 130 states and 155 transitions. Second operand 19 states. [2020-10-13 11:09:13,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:13,657 INFO L93 Difference]: Finished difference Result 242 states and 301 transitions. [2020-10-13 11:09:13,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 11:09:13,657 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 62 [2020-10-13 11:09:13,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:13,659 INFO L225 Difference]: With dead ends: 242 [2020-10-13 11:09:13,659 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 11:09:13,660 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=222, Invalid=1670, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 11:09:13,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 11:09:13,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 142. [2020-10-13 11:09:13,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 11:09:13,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 170 transitions. [2020-10-13 11:09:13,689 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 170 transitions. Word has length 62 [2020-10-13 11:09:13,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:13,689 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 170 transitions. [2020-10-13 11:09:13,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 11:09:13,689 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 170 transitions. [2020-10-13 11:09:13,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 11:09:13,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:13,690 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:13,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 11:09:13,691 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:13,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:13,691 INFO L82 PathProgramCache]: Analyzing trace with hash -2025836289, now seen corresponding path program 9 times [2020-10-13 11:09:13,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:13,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768625737] [2020-10-13 11:09:13,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:13,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:13,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:13,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:13,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:13,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:14,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:14,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:14,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:15,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:16,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:16,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:16,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:16,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:18,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:18,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:18,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:18,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:18,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 11:09:18,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 11:09:18,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5149 [2020-10-13 11:09:18,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:18,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:09:18,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:09:18,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 11:09:18,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:18,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:18,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:18,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:18,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:18,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:18,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 11:09:18,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:18,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:09:18,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:18,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:09:18,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:09:19,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:09:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:19,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:19,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:19,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:19,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:19,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:19,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:19,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:19,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:19,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:19,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:20,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:20,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:20,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:20,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:20,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:21,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:23,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:23,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:23,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:23,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:23,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:23,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:23,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:23,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:24,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:24,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 11:09:24,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-13 11:09:24,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 11:09:24,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:09:24,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-13 11:09:24,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 11:09:24,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-10-13 11:09:24,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768625737] [2020-10-13 11:09:24,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:24,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 11:09:24,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31380286] [2020-10-13 11:09:24,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 11:09:24,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:24,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 11:09:24,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-13 11:09:24,173 INFO L87 Difference]: Start difference. First operand 142 states and 170 transitions. Second operand 12 states. [2020-10-13 11:09:24,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:24,736 INFO L93 Difference]: Finished difference Result 227 states and 278 transitions. [2020-10-13 11:09:24,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 11:09:24,737 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-13 11:09:24,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:24,740 INFO L225 Difference]: With dead ends: 227 [2020-10-13 11:09:24,740 INFO L226 Difference]: Without dead ends: 148 [2020-10-13 11:09:24,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2020-10-13 11:09:24,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-13 11:09:24,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2020-10-13 11:09:24,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 11:09:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 167 transitions. [2020-10-13 11:09:24,772 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 167 transitions. Word has length 62 [2020-10-13 11:09:24,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:24,773 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 167 transitions. [2020-10-13 11:09:24,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 11:09:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 167 transitions. [2020-10-13 11:09:24,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 11:09:24,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:24,774 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:24,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 11:09:24,774 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:24,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:24,775 INFO L82 PathProgramCache]: Analyzing trace with hash -894921607, now seen corresponding path program 10 times [2020-10-13 11:09:24,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:24,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694955758] [2020-10-13 11:09:24,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:24,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:24,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:24,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:24,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:24,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:25,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:25,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:26,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:26,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:26,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:27,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:28,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:28,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:28,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:29,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:30,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:30,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 11:09:30,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 11:09:30,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5483 [2020-10-13 11:09:30,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:09:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:09:30,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 11:09:30,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:30,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:30,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:30,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:30,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:30,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:30,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 11:09:30,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:30,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:09:30,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:30,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:09:30,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:30,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:09:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:30,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:30,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:30,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:30,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:30,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:30,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:31,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:32,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:32,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:34,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:34,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:35,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:35,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 11:09:35,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 11:09:35,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:09:35,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 11:09:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:09:35,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 11:09:35,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 8 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 11:09:37,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694955758] [2020-10-13 11:09:37,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:37,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 11:09:37,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835970558] [2020-10-13 11:09:37,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 11:09:37,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:37,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 11:09:37,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2020-10-13 11:09:37,262 INFO L87 Difference]: Start difference. First operand 140 states and 167 transitions. Second operand 31 states. [2020-10-13 11:09:38,211 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-13 11:09:38,404 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2020-10-13 11:09:38,619 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2020-10-13 11:09:38,813 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2020-10-13 11:09:39,076 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-13 11:09:39,452 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 56 [2020-10-13 11:09:39,612 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-13 11:09:40,096 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-13 11:09:40,237 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2020-10-13 11:09:40,437 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 68 [2020-10-13 11:09:40,623 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-13 11:09:40,776 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-10-13 11:09:41,028 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-13 11:09:41,170 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-13 11:09:41,525 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 64 [2020-10-13 11:09:41,707 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-13 11:09:41,898 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 67 [2020-10-13 11:09:42,451 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-10-13 11:09:43,098 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-13 11:09:43,377 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-13 11:09:44,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:44,120 INFO L93 Difference]: Finished difference Result 546 states and 715 transitions. [2020-10-13 11:09:44,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-13 11:09:44,121 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 62 [2020-10-13 11:09:44,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:44,124 INFO L225 Difference]: With dead ends: 546 [2020-10-13 11:09:44,125 INFO L226 Difference]: Without dead ends: 403 [2020-10-13 11:09:44,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1048, Invalid=5272, Unknown=0, NotChecked=0, Total=6320 [2020-10-13 11:09:44,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-13 11:09:44,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 161. [2020-10-13 11:09:44,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-13 11:09:44,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 195 transitions. [2020-10-13 11:09:44,156 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 195 transitions. Word has length 62 [2020-10-13 11:09:44,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:44,157 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 195 transitions. [2020-10-13 11:09:44,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 11:09:44,157 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 195 transitions. [2020-10-13 11:09:44,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 11:09:44,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:44,157 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:44,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 11:09:44,158 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:44,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:44,158 INFO L82 PathProgramCache]: Analyzing trace with hash 589750009, now seen corresponding path program 11 times [2020-10-13 11:09:44,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:44,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287812055] [2020-10-13 11:09:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:44,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:44,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:44,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:44,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:44,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:44,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:44,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:45,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:45,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:49,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:49,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 11:09:49,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 11:09:49,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:09:49,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:49,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:09:49,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:09:49,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 11:09:49,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:49,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:09:49,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:49,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:49,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:49,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:09:49,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:09:49,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:09:49,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:49,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:09:49,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:09:49,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:09:49,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:49,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:09:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:49,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:49,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:49,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:49,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:49,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:54,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:09:54,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 11:09:54,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 11:09:54,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 11:09:54,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:09:54,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 11:09:54,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-13 11:09:54,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 11:09:54,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:09:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-13 11:09:54,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287812055] [2020-10-13 11:09:54,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:09:54,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 11:09:54,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583442032] [2020-10-13 11:09:54,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 11:09:54,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:09:54,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 11:09:54,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-13 11:09:54,275 INFO L87 Difference]: Start difference. First operand 161 states and 195 transitions. Second operand 11 states. [2020-10-13 11:09:54,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:09:54,876 INFO L93 Difference]: Finished difference Result 311 states and 386 transitions. [2020-10-13 11:09:54,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 11:09:54,877 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-10-13 11:09:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:09:54,879 INFO L225 Difference]: With dead ends: 311 [2020-10-13 11:09:54,880 INFO L226 Difference]: Without dead ends: 275 [2020-10-13 11:09:54,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2020-10-13 11:09:54,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-10-13 11:09:54,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 169. [2020-10-13 11:09:54,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-13 11:09:54,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 206 transitions. [2020-10-13 11:09:54,914 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 206 transitions. Word has length 62 [2020-10-13 11:09:54,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:09:54,914 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 206 transitions. [2020-10-13 11:09:54,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 11:09:54,914 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 206 transitions. [2020-10-13 11:09:54,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 11:09:54,915 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:09:54,915 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:09:54,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 11:09:54,916 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:09:54,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:09:54,916 INFO L82 PathProgramCache]: Analyzing trace with hash -166316897, now seen corresponding path program 12 times [2020-10-13 11:09:54,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:09:54,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347574769] [2020-10-13 11:09:54,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:09:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:09:54,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:54,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:54,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:54,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:55,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:55,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:55,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:55,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:55,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:56,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:56,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:56,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:56,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:57,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:57,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:57,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:57,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:58,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:58,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:58,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:59,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:09:59,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:00,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:00,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-13 11:10:00,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-13 11:10:00,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5213 [2020-10-13 11:10:00,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:00,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:10:00,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 11:10:00,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 11:10:00,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:00,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:00,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:00,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:00,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:10:00,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:00,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 11:10:00,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:00,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:10:00,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:00,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:10:00,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:00,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:10:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:00,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:00,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:00,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:00,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:00,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:00,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:00,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:00,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:01,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:01,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:01,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:01,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:01,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:02,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:02,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:02,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:02,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:02,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:02,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:03,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:03,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:03,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:03,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:03,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:03,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:03,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:04,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:04,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:04,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:04,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:04,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:04,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:04,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:05,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:05,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:05,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:05,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-13 11:10:05,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 35 [2020-10-13 11:10:05,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:10:05,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:05,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 11:10:05,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 11:10:05,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 11:10:05,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 124 proven. 24 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-10-13 11:10:05,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347574769] [2020-10-13 11:10:05,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:05,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 11:10:05,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757568286] [2020-10-13 11:10:05,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 11:10:05,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:05,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 11:10:05,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-13 11:10:05,358 INFO L87 Difference]: Start difference. First operand 169 states and 206 transitions. Second operand 14 states. [2020-10-13 11:10:06,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:06,270 INFO L93 Difference]: Finished difference Result 311 states and 381 transitions. [2020-10-13 11:10:06,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 11:10:06,270 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 72 [2020-10-13 11:10:06,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:06,272 INFO L225 Difference]: With dead ends: 311 [2020-10-13 11:10:06,273 INFO L226 Difference]: Without dead ends: 182 [2020-10-13 11:10:06,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2020-10-13 11:10:06,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-13 11:10:06,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 169. [2020-10-13 11:10:06,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-13 11:10:06,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 201 transitions. [2020-10-13 11:10:06,314 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 201 transitions. Word has length 72 [2020-10-13 11:10:06,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:06,315 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 201 transitions. [2020-10-13 11:10:06,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 11:10:06,315 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 201 transitions. [2020-10-13 11:10:06,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 11:10:06,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:06,316 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:06,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 11:10:06,317 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:06,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:06,317 INFO L82 PathProgramCache]: Analyzing trace with hash 138184329, now seen corresponding path program 13 times [2020-10-13 11:10:06,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:06,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063698739] [2020-10-13 11:10:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:06,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:06,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:06,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:06,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:06,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:06,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:06,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:06,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:07,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:07,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:07,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:07,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:08,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:10,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:10,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:11,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:11,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:11,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 11:10:11,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 11:10:11,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 11:10:11,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:11,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:10:11,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 11:10:11,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:10:11,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:11,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:11,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:11,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:11,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:10:11,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:11,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:10:11,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:11,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:11,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:11,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:11,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:11,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:10:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:11,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:11,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:11,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:11,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:11,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:11,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:11,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:11,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:11,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:12,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:12,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:13,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:13,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:13,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:13,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:13,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:13,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:13,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:13,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:14,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:14,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:14,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:14,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:14,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:14,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:14,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:14,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:14,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:15,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:15,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:15,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:15,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:16,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:16,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:16,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 11:10:16,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 33 [2020-10-13 11:10:16,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:10:16,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:16,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 11:10:16,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 11:10:16,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 11:10:16,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 138 proven. 31 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-13 11:10:16,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063698739] [2020-10-13 11:10:16,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:16,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 11:10:16,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740593206] [2020-10-13 11:10:16,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 11:10:16,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:16,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 11:10:16,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-13 11:10:16,807 INFO L87 Difference]: Start difference. First operand 169 states and 201 transitions. Second operand 17 states. [2020-10-13 11:10:18,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:18,763 INFO L93 Difference]: Finished difference Result 300 states and 370 transitions. [2020-10-13 11:10:18,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 11:10:18,764 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 75 [2020-10-13 11:10:18,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:18,766 INFO L225 Difference]: With dead ends: 300 [2020-10-13 11:10:18,766 INFO L226 Difference]: Without dead ends: 225 [2020-10-13 11:10:18,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 11:10:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-13 11:10:18,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 182. [2020-10-13 11:10:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-13 11:10:18,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 219 transitions. [2020-10-13 11:10:18,802 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 219 transitions. Word has length 75 [2020-10-13 11:10:18,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:18,802 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 219 transitions. [2020-10-13 11:10:18,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 11:10:18,802 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 219 transitions. [2020-10-13 11:10:18,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 11:10:18,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:18,803 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 6, 5, 5, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:18,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 11:10:18,804 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:18,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:18,804 INFO L82 PathProgramCache]: Analyzing trace with hash -2022089651, now seen corresponding path program 14 times [2020-10-13 11:10:18,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:18,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822365461] [2020-10-13 11:10:18,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:18,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:18,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:18,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:18,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:19,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:19,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:19,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:19,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:20,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:20,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:20,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:20,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:20,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:21,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:22,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:24,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:24,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 11:10:24,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-13 11:10:24,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5409 [2020-10-13 11:10:24,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:24,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:10:24,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 11:10:24,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 11:10:24,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:24,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:24,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:24,254 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:24,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:10:24,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:24,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:10:24,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:24,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:24,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:24,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:24,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:24,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:10:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:24,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:24,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:24,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:24,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:24,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:24,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:24,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:24,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:24,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:24,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:25,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:25,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:25,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:25,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:25,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:25,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:26,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:26,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:26,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:26,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:26,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:26,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:26,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:27,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:27,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:29,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:29,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 11:10:29,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-13 11:10:29,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 11:10:29,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:29,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 11:10:29,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 11:10:29,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 11:10:29,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 111 proven. 36 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-10-13 11:10:29,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822365461] [2020-10-13 11:10:29,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:29,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 11:10:29,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935398938] [2020-10-13 11:10:29,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 11:10:29,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:29,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 11:10:29,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-13 11:10:29,361 INFO L87 Difference]: Start difference. First operand 182 states and 219 transitions. Second operand 13 states. [2020-10-13 11:10:30,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:30,372 INFO L93 Difference]: Finished difference Result 405 states and 502 transitions. [2020-10-13 11:10:30,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 11:10:30,373 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2020-10-13 11:10:30,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:30,375 INFO L225 Difference]: With dead ends: 405 [2020-10-13 11:10:30,375 INFO L226 Difference]: Without dead ends: 256 [2020-10-13 11:10:30,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=742, Unknown=0, NotChecked=0, Total=992 [2020-10-13 11:10:30,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-13 11:10:30,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 237. [2020-10-13 11:10:30,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-13 11:10:30,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 288 transitions. [2020-10-13 11:10:30,444 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 288 transitions. Word has length 75 [2020-10-13 11:10:30,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:30,444 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 288 transitions. [2020-10-13 11:10:30,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 11:10:30,444 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 288 transitions. [2020-10-13 11:10:30,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 11:10:30,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:30,449 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:30,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 11:10:30,450 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:30,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:30,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1443736917, now seen corresponding path program 15 times [2020-10-13 11:10:30,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:30,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955636341] [2020-10-13 11:10:30,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:30,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:30,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:30,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:30,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:30,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:31,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:31,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:31,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:31,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:32,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:32,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:32,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:32,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:33,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:35,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:35,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 11:10:35,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 11:10:35,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:10:35,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:35,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:10:35,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 11:10:35,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:10:35,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:35,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:35,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:35,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:35,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:10:35,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:35,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:10:35,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:35,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:35,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:35,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:35,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:35,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:10:35,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:35,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:35,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:35,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:35,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:35,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:36,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:36,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:36,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:36,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:36,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:37,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:37,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:37,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:37,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:37,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:38,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:39,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:39,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:40,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:40,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:40,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:10:40,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-13 11:10:40,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:10:40,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:40,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 11:10:40,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 11:10:40,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 11:10:40,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 150 proven. 51 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-13 11:10:41,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955636341] [2020-10-13 11:10:41,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:41,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 11:10:41,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970030965] [2020-10-13 11:10:41,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 11:10:41,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:41,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 11:10:41,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2020-10-13 11:10:41,509 INFO L87 Difference]: Start difference. First operand 237 states and 288 transitions. Second operand 22 states. [2020-10-13 11:10:43,187 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-13 11:10:43,807 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-13 11:10:43,989 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-10-13 11:10:44,280 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-13 11:10:44,479 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-13 11:10:44,685 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-13 11:10:44,933 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-13 11:10:45,637 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-13 11:10:45,930 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-10-13 11:10:46,093 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-13 11:10:46,273 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-13 11:10:47,076 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 50 [2020-10-13 11:10:47,260 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2020-10-13 11:10:47,469 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 28 [2020-10-13 11:10:47,722 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-10-13 11:10:47,957 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-10-13 11:10:48,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:10:48,118 INFO L93 Difference]: Finished difference Result 391 states and 485 transitions. [2020-10-13 11:10:48,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-13 11:10:48,119 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 78 [2020-10-13 11:10:48,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:10:48,122 INFO L225 Difference]: With dead ends: 391 [2020-10-13 11:10:48,122 INFO L226 Difference]: Without dead ends: 369 [2020-10-13 11:10:48,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=762, Invalid=4494, Unknown=0, NotChecked=0, Total=5256 [2020-10-13 11:10:48,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-13 11:10:48,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 284. [2020-10-13 11:10:48,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-13 11:10:48,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 352 transitions. [2020-10-13 11:10:48,180 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 352 transitions. Word has length 78 [2020-10-13 11:10:48,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:10:48,180 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 352 transitions. [2020-10-13 11:10:48,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 11:10:48,180 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 352 transitions. [2020-10-13 11:10:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 11:10:48,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:10:48,182 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:10:48,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 11:10:48,182 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:10:48,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:10:48,182 INFO L82 PathProgramCache]: Analyzing trace with hash -550407789, now seen corresponding path program 16 times [2020-10-13 11:10:48,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:10:48,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562916138] [2020-10-13 11:10:48,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:10:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:48,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:48,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:48,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:48,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:48,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:48,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:49,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:49,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:49,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:49,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:49,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:50,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:50,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:50,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:53,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:53,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 11:10:53,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-13 11:10:53,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:10:53,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:53,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:10:53,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-13 11:10:53,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:10:53,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:53,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:10:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:53,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:53,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:53,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:10:53,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:10:53,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:10:53,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:53,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:10:53,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:10:53,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:10:53,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:53,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-13 11:10:53,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:10:53,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:53,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:53,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:53,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:54,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:54,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:54,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:55,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:55,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:55,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:55,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:56,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:10:58,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:10:58,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 11:10:58,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 11:10:58,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 11:10:58,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:10:58,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:10:58,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 11:10:58,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 11:10:58,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:10:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 118 proven. 64 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-13 11:10:58,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562916138] [2020-10-13 11:10:58,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:10:58,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 11:10:58,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309645165] [2020-10-13 11:10:58,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 11:10:58,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:10:58,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 11:10:58,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:10:58,882 INFO L87 Difference]: Start difference. First operand 284 states and 352 transitions. Second operand 18 states. [2020-10-13 11:11:02,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:11:02,056 INFO L93 Difference]: Finished difference Result 567 states and 722 transitions. [2020-10-13 11:11:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 11:11:02,057 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 78 [2020-10-13 11:11:02,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:11:02,059 INFO L225 Difference]: With dead ends: 567 [2020-10-13 11:11:02,060 INFO L226 Difference]: Without dead ends: 397 [2020-10-13 11:11:02,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=255, Invalid=2295, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 11:11:02,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-10-13 11:11:02,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 326. [2020-10-13 11:11:02,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-13 11:11:02,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 409 transitions. [2020-10-13 11:11:02,124 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 409 transitions. Word has length 78 [2020-10-13 11:11:02,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:11:02,124 INFO L479 AbstractCegarLoop]: Abstraction has 326 states and 409 transitions. [2020-10-13 11:11:02,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 11:11:02,124 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 409 transitions. [2020-10-13 11:11:02,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 11:11:02,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:11:02,125 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:11:02,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 11:11:02,125 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:11:02,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:11:02,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1534961901, now seen corresponding path program 17 times [2020-10-13 11:11:02,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:11:02,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689783200] [2020-10-13 11:11:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:11:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:11:02,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:02,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:02,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:02,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:02,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:02,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:03,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:03,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:03,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:11:04,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking...