/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/sina1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:15:29,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:15:29,604 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:15:29,630 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:15:29,630 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:15:29,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:15:29,633 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:15:29,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:15:29,638 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:15:29,639 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:15:29,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:15:29,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:15:29,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:15:29,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:15:29,646 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:15:29,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:15:29,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:15:29,650 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:15:29,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:15:29,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:15:29,655 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:15:29,656 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:15:29,658 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:15:29,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:15:29,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:15:29,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:15:29,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:15:29,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:15:29,665 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:15:29,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:15:29,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:15:29,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:15:29,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:15:29,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:15:29,672 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:15:29,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:15:29,673 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:15:29,674 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:15:29,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:15:29,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:15:29,676 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:15:29,678 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 10:15:29,719 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:15:29,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:15:29,721 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:15:29,721 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:15:29,721 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:15:29,721 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:15:29,722 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:15:29,722 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:15:29,722 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:15:29,722 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:15:29,722 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:15:29,723 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:15:29,723 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:15:29,723 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:15:29,723 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:15:29,723 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:15:29,724 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:15:29,724 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:15:29,724 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:15:29,724 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:15:29,725 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:15:29,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:15:29,725 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:15:29,725 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:15:29,726 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:15:29,726 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:15:29,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:15:29,726 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:15:29,726 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:15:29,727 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:15:30,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:15:30,120 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:15:30,124 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:15:30,126 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:15:30,126 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:15:30,127 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sina1.c [2020-10-12 10:15:30,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afaf5abc3/59f00748ddc74a17859ca02a38b40dd6/FLAG171f66d67 [2020-10-12 10:15:30,694 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:15:30,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/sina1.c [2020-10-12 10:15:30,702 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afaf5abc3/59f00748ddc74a17859ca02a38b40dd6/FLAG171f66d67 [2020-10-12 10:15:31,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/afaf5abc3/59f00748ddc74a17859ca02a38b40dd6 [2020-10-12 10:15:31,077 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:15:31,079 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:15:31,080 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:15:31,081 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:15:31,085 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:15:31,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:15:31" (1/1) ... [2020-10-12 10:15:31,089 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58b1442d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:31, skipping insertion in model container [2020-10-12 10:15:31,089 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:15:31" (1/1) ... [2020-10-12 10:15:31,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:15:31,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:15:31,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:15:31,326 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:15:31,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:15:31,373 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:15:31,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:31 WrapperNode [2020-10-12 10:15:31,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:15:31,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:15:31,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:15:31,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:15:31,482 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:31" (1/1) ... [2020-10-12 10:15:31,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:31" (1/1) ... [2020-10-12 10:15:31,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:31" (1/1) ... [2020-10-12 10:15:31,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:31" (1/1) ... [2020-10-12 10:15:31,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:31" (1/1) ... [2020-10-12 10:15:31,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:31" (1/1) ... [2020-10-12 10:15:31,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:31" (1/1) ... [2020-10-12 10:15:31,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:15:31,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:15:31,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:15:31,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:15:31,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:31" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:15:31,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:15:31,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:15:31,589 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 10:15:31,590 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:15:31,590 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:15:31,590 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:15:31,590 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 10:15:31,590 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 10:15:31,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:15:31,591 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:15:31,591 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 10:15:31,591 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:15:31,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:15:31,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 10:15:31,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:15:31,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:15:31,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:15:31,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:15:31,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:15:31,895 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:15:31,896 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 10:15:31,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:15:31 BoogieIcfgContainer [2020-10-12 10:15:31,901 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:15:31,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:15:31,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:15:31,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:15:31,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:15:31" (1/3) ... [2020-10-12 10:15:31,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5535abb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:15:31, skipping insertion in model container [2020-10-12 10:15:31,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:15:31" (2/3) ... [2020-10-12 10:15:31,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5535abb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:15:31, skipping insertion in model container [2020-10-12 10:15:31,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:15:31" (3/3) ... [2020-10-12 10:15:31,911 INFO L109 eAbstractionObserver]: Analyzing ICFG sina1.c [2020-10-12 10:15:31,924 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:15:31,933 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:15:31,949 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:15:31,974 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:15:31,975 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:15:31,975 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:15:31,975 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:15:31,975 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:15:31,975 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:15:31,975 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:15:31,975 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:15:32,000 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-12 10:15:32,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 10:15:32,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:32,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:32,007 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:32,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:32,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-10-12 10:15:32,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:32,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115666686] [2020-10-12 10:15:32,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:32,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:32,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:32,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:32,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:32,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:32,957 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:32,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 10:15:32,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:15:32,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 807 [2020-10-12 10:15:32,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:32,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:15:32,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-12 10:15:32,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 10:15:32,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 10:15:33,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:33,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:33,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:33,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:33,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:33,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:15:33,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:33,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:33,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:33,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:33,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 10:15:33,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:33,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:33,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:33,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:33,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:33,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:33,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:15:33,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:15:33,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:33,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:33,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:33,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:33,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:33,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115666686] [2020-10-12 10:15:33,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:15:33,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 10:15:33,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772302649] [2020-10-12 10:15:33,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:15:33,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:33,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:15:33,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:15:33,136 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 6 states. [2020-10-12 10:15:33,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:33,461 INFO L93 Difference]: Finished difference Result 77 states and 103 transitions. [2020-10-12 10:15:33,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:15:33,464 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-12 10:15:33,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:33,474 INFO L225 Difference]: With dead ends: 77 [2020-10-12 10:15:33,475 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 10:15:33,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:15:33,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 10:15:33,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2020-10-12 10:15:33,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 10:15:33,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-10-12 10:15:33,534 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 22 [2020-10-12 10:15:33,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:33,535 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-10-12 10:15:33,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:15:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-10-12 10:15:33,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 10:15:33,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:33,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:33,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:15:33,537 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:33,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:33,538 INFO L82 PathProgramCache]: Analyzing trace with hash -69884793, now seen corresponding path program 1 times [2020-10-12 10:15:33,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:33,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1414727125] [2020-10-12 10:15:33,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:33,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:33,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:33,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:34,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:34,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 10:15:34,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:15:34,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 790 [2020-10-12 10:15:34,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:34,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:15:34,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:34,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:15:34,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:34,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:34,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:34,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:34,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:34,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:34,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:15:34,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:34,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:34,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:34,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:34,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:34,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:34,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:34,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:34,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:34,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:34,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:15:34,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:34,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:34,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:34,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:34,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:34,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1414727125] [2020-10-12 10:15:34,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:34,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:15:34,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744764155] [2020-10-12 10:15:34,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:15:34,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:34,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:15:34,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:15:34,910 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 14 states. [2020-10-12 10:15:36,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:36,378 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-10-12 10:15:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:15:36,379 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 26 [2020-10-12 10:15:36,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:36,381 INFO L225 Difference]: With dead ends: 57 [2020-10-12 10:15:36,381 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 10:15:36,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:15:36,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 10:15:36,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-12 10:15:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 10:15:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-10-12 10:15:36,394 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 26 [2020-10-12 10:15:36,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:36,395 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-10-12 10:15:36,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:15:36,395 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-10-12 10:15:36,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 10:15:36,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:36,396 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:36,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:15:36,397 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:36,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:36,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1048027141, now seen corresponding path program 2 times [2020-10-12 10:15:36,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:36,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674185243] [2020-10-12 10:15:36,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:36,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:36,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:36,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:36,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:36,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 10:15:36,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:15:36,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 366 [2020-10-12 10:15:36,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:36,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:15:36,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:36,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 10:15:36,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:37,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:37,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:37,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:37,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:37,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:37,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:15:37,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:37,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:37,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:37,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:37,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:37,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:37,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:37,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:37,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:37,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:37,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:15:37,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:37,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:37,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:37,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:37,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:37,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674185243] [2020-10-12 10:15:37,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:37,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:15:37,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257347329] [2020-10-12 10:15:37,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:15:37,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:37,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:15:37,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:15:37,240 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 15 states. [2020-10-12 10:15:37,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:37,958 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2020-10-12 10:15:37,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:15:37,959 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 28 [2020-10-12 10:15:37,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:37,962 INFO L225 Difference]: With dead ends: 67 [2020-10-12 10:15:37,962 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 10:15:37,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:15:37,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 10:15:37,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2020-10-12 10:15:37,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-12 10:15:37,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2020-10-12 10:15:37,974 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 28 [2020-10-12 10:15:37,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:37,974 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2020-10-12 10:15:37,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:15:37,975 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2020-10-12 10:15:37,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 10:15:37,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:37,976 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, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:37,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:15:37,976 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:37,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:37,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1619571715, now seen corresponding path program 3 times [2020-10-12 10:15:37,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:37,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273319753] [2020-10-12 10:15:37,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:38,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:38,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:38,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:38,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:38,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 10:15:38,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:15:38,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-12 10:15:38,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:38,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:15:38,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:38,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:15:38,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:38,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:38,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:38,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:38,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:38,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:38,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:15:38,880 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:38,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:38,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:38,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:38,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:38,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:38,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:38,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:38,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:38,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:38,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:15:38,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:38,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:38,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:38,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:38,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:38,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273319753] [2020-10-12 10:15:38,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:38,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:15:38,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978212705] [2020-10-12 10:15:38,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:15:38,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:38,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:15:38,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:15:38,896 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand 17 states. [2020-10-12 10:15:39,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:39,616 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2020-10-12 10:15:39,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 10:15:39,617 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2020-10-12 10:15:39,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:39,618 INFO L225 Difference]: With dead ends: 85 [2020-10-12 10:15:39,618 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 10:15:39,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:15:39,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 10:15:39,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2020-10-12 10:15:39,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 10:15:39,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-10-12 10:15:39,629 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 30 [2020-10-12 10:15:39,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:39,629 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-10-12 10:15:39,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:15:39,630 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-10-12 10:15:39,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 10:15:39,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:39,631 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:39,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:15:39,631 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:39,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:39,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1497286619, now seen corresponding path program 1 times [2020-10-12 10:15:39,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:39,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645587363] [2020-10-12 10:15:39,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:39,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:39,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:39,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:40,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:40,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:40,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 10:15:40,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:15:40,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 734 [2020-10-12 10:15:40,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:40,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:15:40,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:40,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:15:40,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:40,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:40,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:40,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:40,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:40,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:40,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:15:40,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:40,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:40,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:40,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:40,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:40,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:40,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:40,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:40,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:40,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:40,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:40,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:40,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:40,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:40,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:40,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:40,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-12 10:15:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:40,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:40,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:40,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:40,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:40,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:15:40,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:40,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:15:40,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:40,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:15:40,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:40,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:40,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645587363] [2020-10-12 10:15:40,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:40,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:15:40,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839816494] [2020-10-12 10:15:40,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:15:40,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:40,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:15:40,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:15:40,808 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 17 states. [2020-10-12 10:15:41,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:41,825 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2020-10-12 10:15:41,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:15:41,826 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-10-12 10:15:41,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:41,827 INFO L225 Difference]: With dead ends: 61 [2020-10-12 10:15:41,827 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 10:15:41,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:15:41,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 10:15:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-12 10:15:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 10:15:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-12 10:15:41,836 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2020-10-12 10:15:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:41,837 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-12 10:15:41,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:15:41,837 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-12 10:15:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 10:15:41,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:41,838 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:41,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:15:41,839 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:41,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:41,839 INFO L82 PathProgramCache]: Analyzing trace with hash 175308249, now seen corresponding path program 2 times [2020-10-12 10:15:41,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:41,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56458434] [2020-10-12 10:15:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:41,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:41,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:41,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:42,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:42,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:42,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 10:15:42,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:15:42,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1029 [2020-10-12 10:15:42,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:42,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:15:42,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:42,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:15:42,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:43,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:43,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:43,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:43,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:43,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:43,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:43,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:15:43,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:43,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:43,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:43,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:43,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:43,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:43,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:43,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:43,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:43,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:43,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:43,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:43,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:43,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:43,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:43,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:43,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-12 10:15:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:43,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:43,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:43,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:43,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:43,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 10:15:43,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:43,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:15:43,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:15:43,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:15:43,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:43,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56458434] [2020-10-12 10:15:43,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:43,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:15:43,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100648015] [2020-10-12 10:15:43,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:15:43,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:43,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:15:43,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:15:43,189 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 15 states. [2020-10-12 10:15:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:43,568 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-10-12 10:15:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:15:43,568 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-12 10:15:43,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:43,570 INFO L225 Difference]: With dead ends: 59 [2020-10-12 10:15:43,570 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 10:15:43,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:15:43,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 10:15:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2020-10-12 10:15:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 10:15:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2020-10-12 10:15:43,579 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2020-10-12 10:15:43,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:43,579 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2020-10-12 10:15:43,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:15:43,579 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2020-10-12 10:15:43,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 10:15:43,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:43,580 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:43,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:15:43,581 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:43,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:43,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1293945879, now seen corresponding path program 3 times [2020-10-12 10:15:43,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:43,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83921181] [2020-10-12 10:15:43,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:43,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:43,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:44,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:46,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:47,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:47,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 10:15:47,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:15:47,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3767 [2020-10-12 10:15:47,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:47,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:15:47,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:47,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:15:47,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:48,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:48,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:48,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:48,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:48,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:48,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:15:48,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:48,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:48,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:48,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:48,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:48,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:48,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:48,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:48,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:48,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:48,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:48,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:48,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:48,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:48,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:48,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:15:48,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 10:15:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:48,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:48,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:48,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:48,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:48,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:15:48,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:48,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:15:48,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:48,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:15:48,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:15:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:48,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83921181] [2020-10-12 10:15:48,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:48,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:15:48,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028815166] [2020-10-12 10:15:48,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:15:48,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:48,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:15:48,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:15:48,083 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand 21 states. [2020-10-12 10:15:49,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:49,544 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-10-12 10:15:49,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:15:49,545 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 40 [2020-10-12 10:15:49,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:49,546 INFO L225 Difference]: With dead ends: 71 [2020-10-12 10:15:49,546 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 10:15:49,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:15:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 10:15:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2020-10-12 10:15:49,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 10:15:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2020-10-12 10:15:49,575 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 40 [2020-10-12 10:15:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:49,576 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2020-10-12 10:15:49,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:15:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2020-10-12 10:15:49,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 10:15:49,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:49,582 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:49,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:15:49,582 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:49,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1026364181, now seen corresponding path program 4 times [2020-10-12 10:15:49,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:49,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378677420] [2020-10-12 10:15:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:49,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:49,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:49,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:50,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:50,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:53,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:53,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 10:15:53,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:15:53,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3750 [2020-10-12 10:15:53,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:53,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:15:53,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:53,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 10:15:53,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:53,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:15:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:53,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:53,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:53,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:15:53,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:53,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:53,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:53,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:53,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:53,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:53,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:53,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:15:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:53,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:53,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:53,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:53,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:53,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:15:53,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:53,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:15:53,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:53,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:15:53,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:53,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 10:15:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:53,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:53,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:53,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:15:53,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:15:53,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:15:53,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:53,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:15:53,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:15:53,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:15:53,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:15:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:15:53,980 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378677420] [2020-10-12 10:15:53,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:15:53,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:15:53,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457677973] [2020-10-12 10:15:53,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:15:53,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:15:53,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:15:53,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:15:53,982 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand 21 states. [2020-10-12 10:15:55,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:15:55,316 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2020-10-12 10:15:55,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:15:55,316 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-10-12 10:15:55,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:15:55,318 INFO L225 Difference]: With dead ends: 90 [2020-10-12 10:15:55,318 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 10:15:55,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:15:55,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 10:15:55,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2020-10-12 10:15:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 10:15:55,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-10-12 10:15:55,330 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 42 [2020-10-12 10:15:55,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:15:55,331 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-10-12 10:15:55,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:15:55,331 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-10-12 10:15:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 10:15:55,332 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:15:55,332 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:15:55,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:15:55,332 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:15:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:15:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1578390163, now seen corresponding path program 5 times [2020-10-12 10:15:55,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:15:55,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446247482] [2020-10-12 10:15:55,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:15:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:15:55,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:55,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:55,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:55,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:56,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:57,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:15:59,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:15:59,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 10:15:59,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:15:59,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4554 [2020-10-12 10:15:59,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:15:59,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:15:59,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:15:59,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 10:15:59,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:00,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:00,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:00,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:00,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:00,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:00,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:00,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:00,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:00,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:00,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:00,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:00,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:00,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:00,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:00,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:00,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:00,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:00,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:00,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:00,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:00,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:00,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:00,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:00,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-12 10:16:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:00,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:00,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:00,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:00,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:00,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:00,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:00,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:00,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:00,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:00,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:16:00,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446247482] [2020-10-12 10:16:00,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:00,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:16:00,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281684030] [2020-10-12 10:16:00,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:16:00,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:00,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:16:00,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:16:00,274 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 20 states. [2020-10-12 10:16:01,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:01,235 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-10-12 10:16:01,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:16:01,236 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-12 10:16:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:01,237 INFO L225 Difference]: With dead ends: 78 [2020-10-12 10:16:01,237 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 10:16:01,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=1037, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:16:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 10:16:01,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 51. [2020-10-12 10:16:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 10:16:01,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-12 10:16:01,250 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 44 [2020-10-12 10:16:01,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:01,250 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-12 10:16:01,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:16:01,251 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-12 10:16:01,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 10:16:01,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:01,252 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2020-10-12 10:16:01,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:16:01,252 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:01,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:01,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1953824275, now seen corresponding path program 6 times [2020-10-12 10:16:01,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:01,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703271369] [2020-10-12 10:16:01,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:01,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:01,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:01,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:01,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:03,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:03,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:03,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:04,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:06,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:06,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 10:16:06,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:16:06,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:16:06,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:06,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:16:06,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:06,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 10:16:06,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:16:07,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:07,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:07,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:07,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:07,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:07,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:07,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:07,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:07,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:07,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:07,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-12 10:16:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:07,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:16:07,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:07,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:07,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:07,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:16:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:07,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:07,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:07,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:07,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:07,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 10:16:07,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:07,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:16:07,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:07,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:16:07,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:16:07,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703271369] [2020-10-12 10:16:07,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:07,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:16:07,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335945235] [2020-10-12 10:16:07,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:16:07,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:07,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:16:07,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:16:07,170 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 22 states. [2020-10-12 10:16:07,458 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-12 10:16:07,952 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-12 10:16:08,397 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-12 10:16:09,613 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-12 10:16:09,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:09,682 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-10-12 10:16:09,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:16:09,683 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-12 10:16:09,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:09,685 INFO L225 Difference]: With dead ends: 81 [2020-10-12 10:16:09,685 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 10:16:09,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=337, Invalid=1555, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:16:09,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 10:16:09,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-12 10:16:09,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 10:16:09,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2020-10-12 10:16:09,702 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2020-10-12 10:16:09,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:09,702 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2020-10-12 10:16:09,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:16:09,702 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2020-10-12 10:16:09,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 10:16:09,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:09,703 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2020-10-12 10:16:09,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:16:09,704 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:09,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:09,704 INFO L82 PathProgramCache]: Analyzing trace with hash -719836437, now seen corresponding path program 7 times [2020-10-12 10:16:09,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:09,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151323623] [2020-10-12 10:16:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:09,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:09,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:10,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:11,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:13,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:13,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 10:16:13,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:16:13,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3886 [2020-10-12 10:16:13,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:13,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:16:13,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:13,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 10:16:13,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:14,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:14,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:14,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:14,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:14,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:14,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:14,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:14,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:14,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:14,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:14,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:14,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:14,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:14,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:14,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:14,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:14,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:14,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:14,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:14,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:14,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:14,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 10:16:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:14,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:14,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:14,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:14,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:14,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:14,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:14,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:14,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:14,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:14,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 10:16:14,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:14,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:14,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:14,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:14,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:14,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:14,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:14,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:14,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:14,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:14,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:14,360 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 10:16:14,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151323623] [2020-10-12 10:16:14,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:14,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:16:14,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239111645] [2020-10-12 10:16:14,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:16:14,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:14,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:16:14,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:16:14,363 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 24 states. [2020-10-12 10:16:16,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:16,918 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-10-12 10:16:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:16:16,925 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 50 [2020-10-12 10:16:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:16,926 INFO L225 Difference]: With dead ends: 88 [2020-10-12 10:16:16,926 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 10:16:16,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=238, Invalid=1654, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:16:16,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 10:16:16,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-10-12 10:16:16,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 10:16:16,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2020-10-12 10:16:16,959 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 50 [2020-10-12 10:16:16,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:16,960 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2020-10-12 10:16:16,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:16:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2020-10-12 10:16:16,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 10:16:16,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:16,963 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 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] [2020-10-12 10:16:16,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:16:16,966 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:16,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:16,967 INFO L82 PathProgramCache]: Analyzing trace with hash -268497815, now seen corresponding path program 8 times [2020-10-12 10:16:16,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:16,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349238391] [2020-10-12 10:16:16,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:16,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:17,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:17,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:17,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:17,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:17,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:20,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:20,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 10:16:20,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:16:20,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3840 [2020-10-12 10:16:20,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:20,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:16:20,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:20,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 10:16:20,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:21,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:21,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:21,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:21,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:21,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:21,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:21,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:21,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:21,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:21,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:21,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:21,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:21,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:21,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:21,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:21,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:21,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:21,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:21,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:21,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:21,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:21,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:21,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-12 10:16:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:21,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:21,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:21,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:21,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:21,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:21,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:21,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:21,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:21,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:21,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:21,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 10:16:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:21,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:21,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:21,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:21,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:21,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:21,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:16:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:16:21,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:21,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:21,320 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 33 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 10:16:21,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349238391] [2020-10-12 10:16:21,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:21,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:16:21,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325788579] [2020-10-12 10:16:21,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:16:21,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:21,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:16:21,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:16:21,323 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand 20 states. [2020-10-12 10:16:22,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:22,092 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2020-10-12 10:16:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:16:22,093 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 52 [2020-10-12 10:16:22,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:22,095 INFO L225 Difference]: With dead ends: 102 [2020-10-12 10:16:22,095 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 10:16:22,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:16:22,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 10:16:22,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2020-10-12 10:16:22,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-12 10:16:22,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-10-12 10:16:22,109 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 52 [2020-10-12 10:16:22,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:22,109 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-10-12 10:16:22,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:16:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-10-12 10:16:22,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 10:16:22,111 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:22,111 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:22,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:16:22,111 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:22,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:22,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1027787225, now seen corresponding path program 9 times [2020-10-12 10:16:22,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:22,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274435809] [2020-10-12 10:16:22,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:22,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:22,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:22,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:22,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:24,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:24,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:24,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:26,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:27,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:27,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 10:16:27,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:16:27,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:16:27,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:27,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:16:27,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:27,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 10:16:27,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:28,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:28,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:28,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:28,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:28,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:28,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:28,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:28,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:28,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:28,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:28,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:28,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:28,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:28,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:28,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:28,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:28,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:28,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:28,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:28,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:28,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:28,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:28,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:28,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 10:16:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:28,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:28,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:28,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:28,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:28,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:28,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:28,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:28,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:28,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:28,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:28,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:16:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:28,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:28,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:28,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:28,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:28,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:28,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:28,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:28,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:28,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:28,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 10:16:28,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274435809] [2020-10-12 10:16:28,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:28,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:16:28,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492509446] [2020-10-12 10:16:28,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:16:28,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:28,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:16:28,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=647, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:16:28,054 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 27 states. [2020-10-12 10:16:31,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:31,806 INFO L93 Difference]: Finished difference Result 119 states and 132 transitions. [2020-10-12 10:16:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 10:16:31,807 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 54 [2020-10-12 10:16:31,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:31,809 INFO L225 Difference]: With dead ends: 119 [2020-10-12 10:16:31,809 INFO L226 Difference]: Without dead ends: 117 [2020-10-12 10:16:31,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=323, Invalid=2647, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 10:16:31,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-12 10:16:31,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 83. [2020-10-12 10:16:31,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 10:16:31,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2020-10-12 10:16:31,824 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 54 [2020-10-12 10:16:31,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:31,825 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2020-10-12 10:16:31,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:16:31,825 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2020-10-12 10:16:31,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 10:16:31,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:31,826 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:31,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:16:31,826 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:31,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:31,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1681598629, now seen corresponding path program 10 times [2020-10-12 10:16:31,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:31,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80023263] [2020-10-12 10:16:31,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:31,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:31,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:31,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:31,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:32,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:32,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:35,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:35,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:35,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:36,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:36,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 10:16:36,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:16:36,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:16:36,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:36,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:16:36,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:36,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 10:16:36,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:37,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:37,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:37,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:37,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:37,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:37,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:37,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:37,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:37,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:37,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:37,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:37,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:37,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:37,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:37,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:37,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:37,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:37,508 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:37,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:37,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:37,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:37,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:37,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:16:37,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:37,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:37,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:37,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:37,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:37,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:37,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:37,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:37,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:37,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:37,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:37,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 10:16:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:37,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:37,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:37,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:37,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:37,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:37,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:37,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:37,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:37,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:37,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:37,529 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 51 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:16:37,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80023263] [2020-10-12 10:16:37,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:37,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:16:37,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071753771] [2020-10-12 10:16:37,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:16:37,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:37,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:16:37,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:16:37,531 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand 25 states. [2020-10-12 10:16:39,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:39,297 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2020-10-12 10:16:39,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:16:39,299 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-12 10:16:39,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:39,300 INFO L225 Difference]: With dead ends: 123 [2020-10-12 10:16:39,300 INFO L226 Difference]: Without dead ends: 121 [2020-10-12 10:16:39,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=204, Invalid=1776, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:16:39,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-12 10:16:39,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 66. [2020-10-12 10:16:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 10:16:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-12 10:16:39,314 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 56 [2020-10-12 10:16:39,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:39,315 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-12 10:16:39,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:16:39,315 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-12 10:16:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 10:16:39,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:39,316 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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] [2020-10-12 10:16:39,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:16:39,316 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:39,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1764822209, now seen corresponding path program 11 times [2020-10-12 10:16:39,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:39,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895676485] [2020-10-12 10:16:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:39,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:39,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:39,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:39,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:39,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:39,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:41,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:41,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:42,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:42,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:42,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:44,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:44,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 10:16:44,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:16:44,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:16:44,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:44,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:16:44,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:44,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 10:16:44,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:44,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:44,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:44,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:44,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:44,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:44,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:44,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:44,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:44,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:44,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:44,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:44,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:44,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:44,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:44,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:44,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:44,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:44,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:44,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:44,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:44,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:44,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:44,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:44,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-12 10:16:44,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:44,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:44,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:44,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:44,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:44,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:16:44,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:44,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:44,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:44,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:44,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:44,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 10:16:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:44,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:44,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:44,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:44,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:44,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:16:44,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:44,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:44,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:44,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:44,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:44,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 10:16:44,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:44,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:44,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:44,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:44,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:44,946 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 10:16:44,946 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:44,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:16:44,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:44,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:16:44,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:16:44,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895676485] [2020-10-12 10:16:44,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:44,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:16:44,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131699898] [2020-10-12 10:16:44,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:16:44,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:44,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:16:44,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:16:44,983 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 24 states. [2020-10-12 10:16:46,011 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-10-12 10:16:46,398 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-10-12 10:16:47,576 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-12 10:16:47,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:47,752 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-10-12 10:16:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 10:16:47,753 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 58 [2020-10-12 10:16:47,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:47,754 INFO L225 Difference]: With dead ends: 100 [2020-10-12 10:16:47,755 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 10:16:47,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=469, Invalid=2501, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 10:16:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 10:16:47,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-12 10:16:47,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 10:16:47,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-12 10:16:47,766 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 58 [2020-10-12 10:16:47,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:47,766 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-12 10:16:47,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:16:47,766 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-12 10:16:47,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 10:16:47,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:47,767 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:16:47,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:16:47,768 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:47,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:47,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1834673155, now seen corresponding path program 12 times [2020-10-12 10:16:47,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:47,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590441863] [2020-10-12 10:16:47,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:47,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:47,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:47,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:47,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:48,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:48,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:52,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:52,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 10:16:52,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:16:52,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:16:52,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:52,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:16:52,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:52,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 10:16:52,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:53,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:53,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:53,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:53,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:53,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:53,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:53,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:53,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:53,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:53,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:53,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:53,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:53,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:53,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:53,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:53,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:53,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:53,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:16:53,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:53,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:53,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:53,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:53,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:53,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-12 10:16:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:53,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:53,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:53,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:53,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:53,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:53,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:53,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:53,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:53,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:53,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:53,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:16:53,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:53,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:53,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:53,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:53,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:53,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:53,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:53,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:53,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:53,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:53,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:53,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-12 10:16:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:53,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:53,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:53,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:53,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:53,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:53,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:53,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:16:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:16:53,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:53,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 42 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:16:53,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590441863] [2020-10-12 10:16:53,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:16:53,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:16:53,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127226314] [2020-10-12 10:16:53,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:16:53,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:16:53,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:16:53,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:16:53,220 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 21 states. [2020-10-12 10:16:54,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:16:54,303 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2020-10-12 10:16:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:16:54,304 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 62 [2020-10-12 10:16:54,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:16:54,306 INFO L225 Difference]: With dead ends: 91 [2020-10-12 10:16:54,306 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 10:16:54,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:16:54,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 10:16:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-12 10:16:54,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 10:16:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-12 10:16:54,317 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 62 [2020-10-12 10:16:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:16:54,317 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-12 10:16:54,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:16:54,317 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-12 10:16:54,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 10:16:54,318 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:16:54,318 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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] [2020-10-12 10:16:54,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:16:54,318 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:16:54,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:16:54,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1304383429, now seen corresponding path program 13 times [2020-10-12 10:16:54,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:16:54,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815595448] [2020-10-12 10:16:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:16:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:54,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:54,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:54,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:54,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:59,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:59,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 10:16:59,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:16:59,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:16:59,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:59,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:16:59,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:16:59,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 10:16:59,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:59,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:16:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:59,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:59,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:59,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:16:59,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:59,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:59,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:59,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:59,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:59,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:59,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:59,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:16:59,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:59,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:59,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:59,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:59,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:59,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:59,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:59,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:16:59,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:59,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:16:59,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:59,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-10-12 10:16:59,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:59,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:59,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:59,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:59,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:59,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:59,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:59,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:59,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:59,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:59,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:59,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 10:16:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:59,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:59,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:59,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:59,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:59,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:16:59,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:59,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:16:59,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:16:59,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:59,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:16:59,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-12 10:16:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:16:59,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:16:59,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:16:59,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:16:59,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:16:59,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:16:59,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:16:59,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:16:59,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:16:59,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:16:59,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:00,069 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 22 proven. 49 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:17:00,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815595448] [2020-10-12 10:17:00,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:00,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:17:00,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903239007] [2020-10-12 10:17:00,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:17:00,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:00,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:17:00,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:17:00,072 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 23 states. [2020-10-12 10:17:02,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:02,427 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2020-10-12 10:17:02,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:17:02,428 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2020-10-12 10:17:02,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:02,429 INFO L225 Difference]: With dead ends: 119 [2020-10-12 10:17:02,429 INFO L226 Difference]: Without dead ends: 98 [2020-10-12 10:17:02,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 10:17:02,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-12 10:17:02,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72. [2020-10-12 10:17:02,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 10:17:02,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-12 10:17:02,443 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 64 [2020-10-12 10:17:02,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:02,444 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-12 10:17:02,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:17:02,444 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-12 10:17:02,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 10:17:02,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:02,445 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 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] [2020-10-12 10:17:02,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:17:02,445 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:02,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:02,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1497902329, now seen corresponding path program 14 times [2020-10-12 10:17:02,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:02,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074566101] [2020-10-12 10:17:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:02,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:02,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:02,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:02,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:02,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:04,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:04,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:04,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:07,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:07,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 10:17:07,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:17:07,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:17:07,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:07,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:17:07,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:17:07,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 10:17:07,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:08,197 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 42 [2020-10-12 10:17:09,081 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-12 10:17:09,247 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2020-10-12 10:17:09,400 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-12 10:17:09,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:09,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:09,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:09,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:09,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:09,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:09,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:09,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:09,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:09,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:09,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:09,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:17:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:09,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:09,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:09,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:09,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:09,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:17:09,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:09,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:09,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:09,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:09,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:09,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 10:17:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:09,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:09,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:09,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:09,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:09,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 10:17:09,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:09,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:17:09,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:09,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:17:09,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:10,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 10:17:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:10,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:10,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:10,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:10,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:10,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:17:10,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:10,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:10,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:10,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:17:10,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:10,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:17:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:10,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:10,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:10,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:10,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:10,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:17:10,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:10,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:10,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:10,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:17:10,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:10,134 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 72 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:17:10,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074566101] [2020-10-12 10:17:10,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:10,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:17:10,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413229664] [2020-10-12 10:17:10,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:17:10,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:10,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:17:10,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:17:10,137 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 31 states. [2020-10-12 10:17:10,360 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2020-10-12 10:17:11,040 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-10-12 10:17:11,475 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2020-10-12 10:17:11,675 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2020-10-12 10:17:11,875 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 34 [2020-10-12 10:17:12,134 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-10-12 10:17:12,334 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 33 [2020-10-12 10:17:12,818 WARN L193 SmtUtils]: Spent 418.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 63 [2020-10-12 10:17:13,177 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2020-10-12 10:17:13,715 WARN L193 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 74 [2020-10-12 10:17:14,082 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2020-10-12 10:17:14,516 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 77 [2020-10-12 10:17:14,696 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 35 [2020-10-12 10:17:14,924 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 47 [2020-10-12 10:17:15,418 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 52 [2020-10-12 10:17:15,660 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 45 [2020-10-12 10:17:15,894 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-12 10:17:16,203 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-10-12 10:17:16,546 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2020-10-12 10:17:16,772 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 57 [2020-10-12 10:17:17,262 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 57 [2020-10-12 10:17:17,586 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2020-10-12 10:17:17,836 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-12 10:17:18,043 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2020-10-12 10:17:18,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:18,426 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2020-10-12 10:17:18,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:17:18,426 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-12 10:17:18,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:18,428 INFO L225 Difference]: With dead ends: 117 [2020-10-12 10:17:18,429 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 10:17:18,431 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=660, Invalid=3372, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 10:17:18,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 10:17:18,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2020-10-12 10:17:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-12 10:17:18,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2020-10-12 10:17:18,447 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 66 [2020-10-12 10:17:18,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:18,447 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2020-10-12 10:17:18,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:17:18,448 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2020-10-12 10:17:18,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 10:17:18,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:18,449 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 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] [2020-10-12 10:17:18,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:17:18,449 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:18,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:18,449 INFO L82 PathProgramCache]: Analyzing trace with hash -720888519, now seen corresponding path program 15 times [2020-10-12 10:17:18,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:18,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457541739] [2020-10-12 10:17:18,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:18,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:18,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:18,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:18,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:19,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:23,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:23,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 10:17:23,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:17:23,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:17:23,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:23,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:17:23,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:17:23,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 10:17:23,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:23,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:23,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:23,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:23,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:23,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:23,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:23,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:23,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:23,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:23,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:23,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:23,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:17:23,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:23,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:23,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:23,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:23,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:23,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:23,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:23,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:23,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:23,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:23,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:23,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 10:17:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:23,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:23,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:23,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:23,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:23,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:17:23,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:23,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:23,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:23,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:17:23,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:23,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 10:17:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:23,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:23,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:23,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:23,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:23,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:17:23,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:23,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:23,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:23,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:17:23,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:23,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:17:23,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:23,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:23,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:23,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:23,946 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:23,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:17:23,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:23,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:17:23,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:17:23,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:17:23,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 52 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:17:24,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457541739] [2020-10-12 10:17:24,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:24,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:17:24,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021914820] [2020-10-12 10:17:24,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:17:24,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:24,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:17:24,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:17:24,010 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand 24 states. [2020-10-12 10:17:25,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:25,305 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2020-10-12 10:17:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:17:25,306 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-10-12 10:17:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:25,308 INFO L225 Difference]: With dead ends: 130 [2020-10-12 10:17:25,308 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 10:17:25,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=234, Invalid=1026, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:17:25,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 10:17:25,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2020-10-12 10:17:25,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-12 10:17:25,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2020-10-12 10:17:25,332 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 66 [2020-10-12 10:17:25,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:25,332 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2020-10-12 10:17:25,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:17:25,333 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2020-10-12 10:17:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 10:17:25,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:25,334 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 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] [2020-10-12 10:17:25,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:17:25,334 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:25,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:25,335 INFO L82 PathProgramCache]: Analyzing trace with hash -404204937, now seen corresponding path program 16 times [2020-10-12 10:17:25,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:25,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045980118] [2020-10-12 10:17:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:25,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:25,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:25,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:25,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:30,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:30,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 10:17:30,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:17:30,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:17:30,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:30,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:17:30,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:17:30,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 10:17:30,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:31,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:31,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:31,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:31,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:31,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:31,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:31,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:31,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:31,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:31,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:31,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:17:31,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:17:31,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:31,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:31,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:31,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:31,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:31,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:31,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:31,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:31,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:31,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:31,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:31,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-12 10:17:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:31,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:31,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:31,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:31,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:31,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:17:31,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:31,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:31,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:31,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:17:31,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:31,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:17:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:31,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:31,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:31,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:31,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:31,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:17:31,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:31,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:31,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:31,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:17:31,250 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:17:31,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-12 10:17:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:31,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:31,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:31,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:31,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:31,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:17:31,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:31,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:17:31,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:17:31,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:17:31,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:17:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 22 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:17:31,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045980118] [2020-10-12 10:17:31,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:31,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:17:31,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674891772] [2020-10-12 10:17:31,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:17:31,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:31,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:17:31,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:17:31,399 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand 25 states. [2020-10-12 10:17:34,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:34,102 INFO L93 Difference]: Finished difference Result 160 states and 178 transitions. [2020-10-12 10:17:34,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:17:34,103 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 68 [2020-10-12 10:17:34,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:34,105 INFO L225 Difference]: With dead ends: 160 [2020-10-12 10:17:34,105 INFO L226 Difference]: Without dead ends: 139 [2020-10-12 10:17:34,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=254, Invalid=2296, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 10:17:34,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-12 10:17:34,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 107. [2020-10-12 10:17:34,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 10:17:34,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 115 transitions. [2020-10-12 10:17:34,127 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 115 transitions. Word has length 68 [2020-10-12 10:17:34,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:34,128 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 115 transitions. [2020-10-12 10:17:34,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:17:34,128 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 115 transitions. [2020-10-12 10:17:34,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 10:17:34,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:34,129 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 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] [2020-10-12 10:17:34,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:17:34,129 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:34,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:34,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1013960651, now seen corresponding path program 17 times [2020-10-12 10:17:34,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:34,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326441845] [2020-10-12 10:17:34,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:34,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:34,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:34,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:34,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:34,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:35,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:36,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:38,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:39,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:39,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 10:17:39,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:17:39,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:17:39,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:39,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:17:39,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:17:39,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 10:17:39,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:39,725 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2020-10-12 10:17:39,880 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2020-10-12 10:17:40,250 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 41 [2020-10-12 10:17:40,660 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 50 [2020-10-12 10:17:40,876 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 43 [2020-10-12 10:17:41,069 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2020-10-12 10:17:41,305 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 53 [2020-10-12 10:17:41,510 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 52 [2020-10-12 10:17:41,680 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-12 10:17:42,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:42,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:42,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:42,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:42,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:42,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:42,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:42,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:42,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:42,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:42,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:42,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:17:42,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:42,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:42,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:42,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:42,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:42,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:42,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:42,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:42,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:42,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:42,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:42,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:17:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:42,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:42,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:42,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:42,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:42,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:17:42,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:42,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:17:42,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:42,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:17:42,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:42,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-12 10:17:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:42,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:42,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:42,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:42,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:42,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:17:42,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:42,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:42,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:42,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:17:42,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:17:42,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-12 10:17:42,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:42,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:42,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:42,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:42,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:42,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:17:42,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:42,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:42,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:42,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:17:42,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 5 proven. 97 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:17:42,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326441845] [2020-10-12 10:17:42,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:42,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:17:42,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538715060] [2020-10-12 10:17:42,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:17:42,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:42,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:17:42,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:17:42,730 INFO L87 Difference]: Start difference. First operand 107 states and 115 transitions. Second operand 34 states. [2020-10-12 10:17:43,199 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-10-12 10:17:43,755 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 40 [2020-10-12 10:17:44,018 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 40 [2020-10-12 10:17:44,224 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 41 [2020-10-12 10:17:44,498 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 48 [2020-10-12 10:17:44,813 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 52 [2020-10-12 10:17:45,093 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 61 [2020-10-12 10:17:45,384 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 61 [2020-10-12 10:17:45,661 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 61 [2020-10-12 10:17:46,059 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 80 [2020-10-12 10:17:46,365 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 61 [2020-10-12 10:17:46,747 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 60 [2020-10-12 10:17:47,205 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 79 [2020-10-12 10:17:49,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:49,144 INFO L93 Difference]: Finished difference Result 152 states and 168 transitions. [2020-10-12 10:17:49,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 10:17:49,145 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 70 [2020-10-12 10:17:49,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:49,146 INFO L225 Difference]: With dead ends: 152 [2020-10-12 10:17:49,147 INFO L226 Difference]: Without dead ends: 150 [2020-10-12 10:17:49,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=778, Invalid=4478, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 10:17:49,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-12 10:17:49,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 135. [2020-10-12 10:17:49,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-12 10:17:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 148 transitions. [2020-10-12 10:17:49,171 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 148 transitions. Word has length 70 [2020-10-12 10:17:49,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:49,171 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 148 transitions. [2020-10-12 10:17:49,171 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:17:49,171 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 148 transitions. [2020-10-12 10:17:49,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 10:17:49,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:49,172 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 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] [2020-10-12 10:17:49,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:17:49,173 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:49,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:49,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1326780533, now seen corresponding path program 18 times [2020-10-12 10:17:49,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:49,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26413924] [2020-10-12 10:17:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:49,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:49,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:49,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:49,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:49,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:53,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:54,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:54,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 10:17:54,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:17:54,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:17:54,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:54,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:17:54,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:17:54,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 10:17:54,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:54,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:17:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:54,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:54,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:54,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:17:54,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:54,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:54,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:54,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:54,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:54,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:54,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:54,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:17:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:54,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:54,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:54,707 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:54,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:54,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:17:54,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:54,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:17:54,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:54,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:17:54,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:17:54,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:17:54,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:54,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:54,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:54,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:54,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:54,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:17:54,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:54,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:54,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:54,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:17:54,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:54,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-12 10:17:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:54,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:54,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:54,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:54,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:54,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:17:54,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:54,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:17:54,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:17:54,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:17:54,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:17:54,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-12 10:17:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:54,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:54,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:17:54,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:17:54,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:17:54,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:17:54,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:17:54,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:17:54,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:17:54,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:17:54,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:17:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 64 proven. 40 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 10:17:54,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26413924] [2020-10-12 10:17:54,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:17:54,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:17:54,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427679893] [2020-10-12 10:17:54,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:17:54,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:17:54,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:17:54,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:17:54,842 INFO L87 Difference]: Start difference. First operand 135 states and 148 transitions. Second operand 26 states. [2020-10-12 10:17:56,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:17:56,269 INFO L93 Difference]: Finished difference Result 169 states and 188 transitions. [2020-10-12 10:17:56,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:17:56,270 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 70 [2020-10-12 10:17:56,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:17:56,272 INFO L225 Difference]: With dead ends: 169 [2020-10-12 10:17:56,272 INFO L226 Difference]: Without dead ends: 148 [2020-10-12 10:17:56,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=226, Invalid=1106, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:17:56,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-12 10:17:56,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 137. [2020-10-12 10:17:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 10:17:56,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 150 transitions. [2020-10-12 10:17:56,295 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 150 transitions. Word has length 70 [2020-10-12 10:17:56,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:17:56,296 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 150 transitions. [2020-10-12 10:17:56,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:17:56,296 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 150 transitions. [2020-10-12 10:17:56,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 10:17:56,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:17:56,297 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 4, 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] [2020-10-12 10:17:56,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:17:56,297 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:17:56,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:17:56,298 INFO L82 PathProgramCache]: Analyzing trace with hash 310732467, now seen corresponding path program 19 times [2020-10-12 10:17:56,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:17:56,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404962972] [2020-10-12 10:17:56,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:17:56,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:17:56,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:56,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:56,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:56,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:56,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:57,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:57,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:17:58,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:01,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:01,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 10:18:01,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:18:01,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-12 10:18:01,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:01,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 10:18:01,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:18:01,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 10:18:01,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:02,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:02,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:02,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:02,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:02,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:02,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:18:02,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:02,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:02,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:02,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:02,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:02,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:18:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:02,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:02,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:02,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:02,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:02,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:18:02,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:02,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:02,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:02,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:02,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:02,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 10:18:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:02,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:02,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:02,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:02,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:02,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:18:02,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:02,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:02,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:02,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:02,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:02,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-12 10:18:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:02,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:02,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:02,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:02,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:02,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:18:02,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:02,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:02,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:02,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:02,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:02,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-12 10:18:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:02,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:02,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:02,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:02,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:02,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:18:02,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:02,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:02,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:02,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:02,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 6 proven. 99 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 10:18:02,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404962972] [2020-10-12 10:18:02,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:02,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:18:02,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828939485] [2020-10-12 10:18:02,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:18:02,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:02,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:18:02,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:18:02,504 INFO L87 Difference]: Start difference. First operand 137 states and 150 transitions. Second operand 30 states. [2020-10-12 10:18:04,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:04,617 INFO L93 Difference]: Finished difference Result 149 states and 162 transitions. [2020-10-12 10:18:04,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:18:04,618 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 72 [2020-10-12 10:18:04,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:04,619 INFO L225 Difference]: With dead ends: 149 [2020-10-12 10:18:04,619 INFO L226 Difference]: Without dead ends: 147 [2020-10-12 10:18:04,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=241, Invalid=2411, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 10:18:04,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-12 10:18:04,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 82. [2020-10-12 10:18:04,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-12 10:18:04,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-12 10:18:04,633 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 72 [2020-10-12 10:18:04,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:04,633 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-12 10:18:04,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:18:04,634 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-12 10:18:04,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 10:18:04,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:04,634 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:04,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:18:04,634 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:04,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:04,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1643978959, now seen corresponding path program 20 times [2020-10-12 10:18:04,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:04,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9845383] [2020-10-12 10:18:04,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:04,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:04,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:04,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:04,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:05,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:06,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:06,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:06,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:06,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:06,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:08,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:09,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:09,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 10:18:09,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-12 10:18:09,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 10:18:09,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:09,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:18:09,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:18:09,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 10:18:09,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:10,011 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-10-12 10:18:11,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:11,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:11,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:11,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:11,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:11,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:11,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:11,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:11,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:11,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:11,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:11,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:18:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:11,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:11,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:11,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:11,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:11,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:18:11,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:11,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:11,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:11,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:11,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:11,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-10-12 10:18:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:11,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:11,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:11,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:11,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:11,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:18:11,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:11,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:18:11,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:11,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:18:11,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:11,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 10:18:11,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:11,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:11,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:11,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:11,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:11,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:18:11,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:11,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:11,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:11,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:11,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:11,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:18:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:11,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:11,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:11,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:11,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:11,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:18:11,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:11,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:11,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:11,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:11,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:11,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-12 10:18:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:11,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:11,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:11,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:11,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:11,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:11,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:11,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:11,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:11,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:11,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 31 proven. 68 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 10:18:11,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9845383] [2020-10-12 10:18:11,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:11,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:18:11,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192790815] [2020-10-12 10:18:11,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:18:11,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:11,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:18:11,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:18:11,325 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 30 states. [2020-10-12 10:18:11,782 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-12 10:18:12,489 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-12 10:18:12,644 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-10-12 10:18:12,843 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-12 10:18:13,037 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-12 10:18:13,302 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-12 10:18:13,536 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-12 10:18:13,786 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-12 10:18:15,432 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-10-12 10:18:15,650 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2020-10-12 10:18:16,044 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-10-12 10:18:16,336 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2020-10-12 10:18:16,730 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-12 10:18:16,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:16,915 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2020-10-12 10:18:16,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 10:18:16,916 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 74 [2020-10-12 10:18:16,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:16,917 INFO L225 Difference]: With dead ends: 125 [2020-10-12 10:18:16,918 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 10:18:16,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=716, Invalid=3444, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 10:18:16,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 10:18:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-12 10:18:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 10:18:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2020-10-12 10:18:16,933 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 74 [2020-10-12 10:18:16,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:16,934 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2020-10-12 10:18:16,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:18:16,934 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2020-10-12 10:18:16,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 10:18:16,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:16,934 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:16,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:18:16,935 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:16,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:16,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1852037109, now seen corresponding path program 21 times [2020-10-12 10:18:16,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:16,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162292227] [2020-10-12 10:18:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:16,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:17,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:17,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:17,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:18,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:18,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:18,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:18,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:19,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:19,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:21,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:21,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 10:18:21,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 10:18:21,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:18:21,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:21,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 10:18:21,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:18:21,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 10:18:21,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:22,371 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 35 [2020-10-12 10:18:24,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:24,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:24,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:24,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:24,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:24,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:24,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:24,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:24,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:24,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:24,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:24,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:24,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:18:24,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:24,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:24,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:24,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:24,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:24,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:18:24,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:24,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:24,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:24,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:24,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:24,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:18:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:24,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:24,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:24,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:24,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:24,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:18:24,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:24,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:18:24,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:24,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:18:24,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:24,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-12 10:18:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:24,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:24,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:24,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:24,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:24,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:18:24,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:24,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:24,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:24,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:24,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:24,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-12 10:18:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:24,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:24,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:24,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:24,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:24,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:24,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:24,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:24,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:24,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:24,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:24,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-12 10:18:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:24,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:24,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:24,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:24,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:24,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:24,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:24,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:24,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:24,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:24,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 7 proven. 114 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 10:18:24,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162292227] [2020-10-12 10:18:24,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:24,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:18:24,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334799943] [2020-10-12 10:18:24,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:18:24,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:24,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:18:24,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:18:24,197 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand 33 states. [2020-10-12 10:18:25,020 WARN L193 SmtUtils]: Spent 489.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-10-12 10:18:25,744 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-12 10:18:25,986 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-10-12 10:18:26,250 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-12 10:18:26,537 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2020-10-12 10:18:26,900 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 61 [2020-10-12 10:18:27,213 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-12 10:18:27,578 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2020-10-12 10:18:27,902 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-12 10:18:28,494 WARN L193 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 86 [2020-10-12 10:18:30,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:30,874 INFO L93 Difference]: Finished difference Result 128 states and 138 transitions. [2020-10-12 10:18:30,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 10:18:30,875 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 78 [2020-10-12 10:18:30,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:30,876 INFO L225 Difference]: With dead ends: 128 [2020-10-12 10:18:30,876 INFO L226 Difference]: Without dead ends: 126 [2020-10-12 10:18:30,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=734, Invalid=3822, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 10:18:30,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-12 10:18:30,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 118. [2020-10-12 10:18:30,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-12 10:18:30,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2020-10-12 10:18:30,902 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 78 [2020-10-12 10:18:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:30,902 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2020-10-12 10:18:30,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:18:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2020-10-12 10:18:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 10:18:30,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:30,903 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:30,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:18:30,903 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:30,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:30,904 INFO L82 PathProgramCache]: Analyzing trace with hash -2069233527, now seen corresponding path program 22 times [2020-10-12 10:18:30,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:30,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572970704] [2020-10-12 10:18:30,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:30,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:30,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:31,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:31,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:35,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:35,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:35,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 10:18:35,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:18:35,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:18:35,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:35,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:18:35,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:18:35,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 10:18:35,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:36,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:36,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:36,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:36,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:36,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:36,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:36,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:36,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:36,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:36,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:36,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:36,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:18:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:36,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:36,568 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:36,568 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:36,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:36,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:18:36,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:36,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:36,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:36,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:36,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:36,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-12 10:18:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:36,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:36,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:36,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:36,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:36,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:18:36,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:36,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:36,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:36,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-12 10:18:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:36,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:36,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:36,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:36,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:36,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:36,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:36,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:36,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:36,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:36,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:36,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-12 10:18:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:36,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:36,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:36,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:36,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:36,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:18:36,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:36,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:36,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:36,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:36,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:36,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-10-12 10:18:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:36,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:36,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:36,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:36,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:36,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:18:36,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:36,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:18:36,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:18:36,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:36,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:36,676 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 61 proven. 73 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 10:18:36,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572970704] [2020-10-12 10:18:36,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:36,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 10:18:36,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232206432] [2020-10-12 10:18:36,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 10:18:36,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:36,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 10:18:36,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:18:36,680 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand 28 states. [2020-10-12 10:18:38,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:38,791 INFO L93 Difference]: Finished difference Result 152 states and 167 transitions. [2020-10-12 10:18:38,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:18:38,793 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 80 [2020-10-12 10:18:38,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:38,794 INFO L225 Difference]: With dead ends: 152 [2020-10-12 10:18:38,794 INFO L226 Difference]: Without dead ends: 127 [2020-10-12 10:18:38,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=297, Invalid=1509, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:18:38,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-12 10:18:38,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2020-10-12 10:18:38,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-12 10:18:38,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2020-10-12 10:18:38,826 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 80 [2020-10-12 10:18:38,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:38,827 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2020-10-12 10:18:38,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 10:18:38,827 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2020-10-12 10:18:38,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 10:18:38,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:38,828 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:38,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:18:38,828 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:38,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:38,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1618337465, now seen corresponding path program 23 times [2020-10-12 10:18:38,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:38,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070178799] [2020-10-12 10:18:38,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:38,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:38,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:39,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:39,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:41,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:43,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:43,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 10:18:43,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:18:43,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:18:43,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:43,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 10:18:43,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:18:43,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-12 10:18:43,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:45,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:45,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:45,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:45,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:45,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:45,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:45,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:45,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:45,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:45,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:45,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:45,263 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:45,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:18:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:45,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:45,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:45,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:45,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:45,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:18:45,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:45,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:45,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:45,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:45,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:45,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-12 10:18:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:45,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:45,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:45,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:45,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:45,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:45,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:45,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:45,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:45,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:45,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:45,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-12 10:18:45,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:45,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:45,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:45,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:45,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:45,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:45,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:45,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:45,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:45,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:45,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:45,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-12 10:18:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:45,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:45,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:45,278 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:45,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:45,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:45,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:45,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:45,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:45,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:45,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:45,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-12 10:18:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:45,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:45,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:45,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:45,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:45,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:45,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:45,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:45,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:45,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:45,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:45,300 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 8 proven. 121 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-12 10:18:45,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070178799] [2020-10-12 10:18:45,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:45,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:18:45,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493158166] [2020-10-12 10:18:45,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:18:45,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:45,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:18:45,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1051, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:18:45,302 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand 34 states. [2020-10-12 10:18:50,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:18:50,703 INFO L93 Difference]: Finished difference Result 177 states and 195 transitions. [2020-10-12 10:18:50,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 10:18:50,705 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2020-10-12 10:18:50,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:18:50,707 INFO L225 Difference]: With dead ends: 177 [2020-10-12 10:18:50,707 INFO L226 Difference]: Without dead ends: 175 [2020-10-12 10:18:50,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=454, Invalid=4102, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 10:18:50,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-12 10:18:50,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 161. [2020-10-12 10:18:50,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-12 10:18:50,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 176 transitions. [2020-10-12 10:18:50,749 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 176 transitions. Word has length 82 [2020-10-12 10:18:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:18:50,750 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 176 transitions. [2020-10-12 10:18:50,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:18:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 176 transitions. [2020-10-12 10:18:50,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 10:18:50,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:18:50,751 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:18:50,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 10:18:50,751 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:18:50,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:18:50,752 INFO L82 PathProgramCache]: Analyzing trace with hash 786139845, now seen corresponding path program 24 times [2020-10-12 10:18:50,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:18:50,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989606212] [2020-10-12 10:18:50,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:18:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:50,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:50,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:50,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:51,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:55,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:55,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 10:18:55,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:18:55,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:18:55,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:55,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:18:55,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:18:55,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 10:18:55,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:56,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:18:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:56,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:56,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:56,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:18:56,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:56,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:56,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:56,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:56,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:56,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:56,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:56,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:18:56,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:56,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:56,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:56,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:56,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:56,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:18:56,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:56,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:18:56,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:56,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:18:56,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:56,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-12 10:18:56,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:56,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:56,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:56,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:56,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:56,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:56,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:56,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:56,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:56,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:56,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:56,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-10-12 10:18:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:56,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:56,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:56,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:56,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:56,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:56,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:56,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:56,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:56,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:56,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:56,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-12 10:18:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:56,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:56,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:56,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:56,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:56,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:18:56,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:56,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:18:56,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:18:56,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:56,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:56,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-10-12 10:18:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:18:56,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:18:56,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:18:56,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:18:56,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:18:56,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:18:56,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:18:56,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:18:56,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 10:18:56,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:18:56,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:18:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 31 proven. 131 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-12 10:18:56,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989606212] [2020-10-12 10:18:56,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:18:56,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:18:56,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291101544] [2020-10-12 10:18:56,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:18:56,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:18:56,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:18:56,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=801, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:18:56,928 INFO L87 Difference]: Start difference. First operand 161 states and 176 transitions. Second operand 30 states. [2020-10-12 10:19:03,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:03,579 INFO L93 Difference]: Finished difference Result 261 states and 297 transitions. [2020-10-12 10:19:03,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-12 10:19:03,581 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 84 [2020-10-12 10:19:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:03,583 INFO L225 Difference]: With dead ends: 261 [2020-10-12 10:19:03,583 INFO L226 Difference]: Without dead ends: 215 [2020-10-12 10:19:03,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=591, Invalid=6891, Unknown=0, NotChecked=0, Total=7482 [2020-10-12 10:19:03,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-12 10:19:03,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 170. [2020-10-12 10:19:03,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-12 10:19:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 187 transitions. [2020-10-12 10:19:03,620 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 187 transitions. Word has length 84 [2020-10-12 10:19:03,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:03,620 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 187 transitions. [2020-10-12 10:19:03,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:19:03,621 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 187 transitions. [2020-10-12 10:19:03,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 10:19:03,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:03,622 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:03,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 10:19:03,622 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:03,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:03,623 INFO L82 PathProgramCache]: Analyzing trace with hash 485878241, now seen corresponding path program 25 times [2020-10-12 10:19:03,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:03,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552232679] [2020-10-12 10:19:03,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:03,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:03,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:03,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:04,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:04,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:06,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:06,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:06,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:08,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:08,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-12 10:19:08,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 10:19:08,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:19:08,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:08,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:19:08,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 10:19:08,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-12 10:19:08,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:09,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:09,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:09,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:09,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:09,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:09,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:19:09,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:09,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:09,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:09,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:09,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:09,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-12 10:19:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:09,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:09,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:09,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:09,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:09,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:19:09,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:09,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:09,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:09,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:09,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:09,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-10-12 10:19:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:09,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:09,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:09,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:09,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:09,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:19:09,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:09,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:19:09,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:09,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:19:09,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:09,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-10-12 10:19:09,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:09,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:09,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:09,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:09,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:09,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:19:09,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:09,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:19:09,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:09,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:19:09,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:09,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-12 10:19:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:09,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:09,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:09,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:09,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:09,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:19:09,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:09,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:19:09,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:09,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 10:19:09,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:09,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-12 10:19:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:09,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:09,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:09,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:09,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:09,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:19:09,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:09,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:19:09,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:09,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:19:09,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:09,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-12 10:19:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:09,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:09,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:09,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-12 10:19:09,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:09,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:19:09,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:09,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:19:09,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:09,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:19:09,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 47 proven. 91 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-12 10:19:09,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552232679] [2020-10-12 10:19:09,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:09,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:19:09,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576957385] [2020-10-12 10:19:09,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:19:09,823 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:09,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:19:09,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:19:09,824 INFO L87 Difference]: Start difference. First operand 170 states and 187 transitions. Second operand 29 states.