/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-examples/standard_init8_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:59:05,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:59:05,651 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:59:05,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:59:05,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:59:05,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:59:05,677 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:59:05,679 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:59:05,681 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:59:05,682 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:59:05,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:59:05,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:59:05,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:59:05,685 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:59:05,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:59:05,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:59:05,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:59:05,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:59:05,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:59:05,693 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:59:05,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:59:05,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:59:05,696 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:59:05,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:59:05,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:59:05,700 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:59:05,700 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:59:05,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:59:05,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:59:05,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:59:05,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:59:05,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:59:05,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:59:05,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:59:05,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:59:05,707 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:59:05,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:59:05,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:59:05,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:59:05,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:59:05,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:59:05,710 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 09:59:05,735 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:59:05,735 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:59:05,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:59:05,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:59:05,737 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:59:05,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:59:05,738 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:59:05,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:59:05,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:59:05,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:59:05,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:59:05,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:59:05,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:59:05,739 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:59:05,743 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:59:05,743 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:59:05,743 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:59:05,744 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:59:05,744 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:59:05,744 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:59:05,744 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:59:05,744 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:59:05,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:59:05,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:59:05,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:59:05,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:59:05,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:59:05,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:59:05,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:59:05,747 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 09:59:06,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:59:06,111 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:59:06,122 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:59:06,125 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:59:06,131 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:59:06,132 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init8_ground-2.i [2020-10-12 09:59:06,212 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56214c96b/e92741d1077c4db39238e762b5ea7918/FLAG999fda57a [2020-10-12 09:59:06,721 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:59:06,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init8_ground-2.i [2020-10-12 09:59:06,727 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56214c96b/e92741d1077c4db39238e762b5ea7918/FLAG999fda57a [2020-10-12 09:59:07,063 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/56214c96b/e92741d1077c4db39238e762b5ea7918 [2020-10-12 09:59:07,073 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:59:07,076 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:59:07,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:59:07,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:59:07,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:59:07,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:59:07" (1/1) ... [2020-10-12 09:59:07,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d9afb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:07, skipping insertion in model container [2020-10-12 09:59:07,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:59:07" (1/1) ... [2020-10-12 09:59:07,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:59:07,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:59:07,343 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:59:07,346 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:59:07,368 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:59:07,467 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:59:07,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:07 WrapperNode [2020-10-12 09:59:07,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:59:07,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:59:07,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:59:07,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:59:07,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:07" (1/1) ... [2020-10-12 09:59:07,482 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:07" (1/1) ... [2020-10-12 09:59:07,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:07" (1/1) ... [2020-10-12 09:59:07,490 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:07" (1/1) ... [2020-10-12 09:59:07,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:07" (1/1) ... [2020-10-12 09:59:07,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:07" (1/1) ... [2020-10-12 09:59:07,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:07" (1/1) ... [2020-10-12 09:59:07,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:59:07,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:59:07,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:59:07,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:59:07,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:07" (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 09:59:07,568 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:59:07,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:59:07,569 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:59:07,569 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:59:07,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:59:07,569 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:59:07,569 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:59:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:59:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:59:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:59:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:59:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:59:07,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:59:07,859 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:59:07,860 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-12 09:59:07,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:59:07 BoogieIcfgContainer [2020-10-12 09:59:07,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:59:07,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:59:07,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:59:07,872 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:59:07,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:59:07" (1/3) ... [2020-10-12 09:59:07,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c48765c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:59:07, skipping insertion in model container [2020-10-12 09:59:07,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:59:07" (2/3) ... [2020-10-12 09:59:07,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c48765c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:59:07, skipping insertion in model container [2020-10-12 09:59:07,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:59:07" (3/3) ... [2020-10-12 09:59:07,877 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-2.i [2020-10-12 09:59:07,891 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:59:07,910 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:59:07,945 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:59:07,987 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:59:07,987 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:59:07,988 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:59:07,988 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:59:07,988 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:59:07,988 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:59:07,988 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:59:07,988 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:59:08,009 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-12 09:59:08,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 09:59:08,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:08,017 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:08,018 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:08,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:08,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1916738342, now seen corresponding path program 1 times [2020-10-12 09:59:08,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:08,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31671753] [2020-10-12 09:59:08,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:08,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:08,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:10,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:10,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 09:59:10,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:59:10,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1955 [2020-10-12 09:59:10,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:10,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:59:10,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 09:59:10,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:59:10,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:59:10,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:10,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:10,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:10,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:10,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:10,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:59:10,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:10,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:10,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:10,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:10,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 09:59:10,245 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 09:59:10,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31671753] [2020-10-12 09:59:10,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:59:10,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:59:10,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055249746] [2020-10-12 09:59:10,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:59:10,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:10,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:59:10,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:59:10,287 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-10-12 09:59:10,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:10,530 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-10-12 09:59:10,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:59:10,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-12 09:59:10,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:10,542 INFO L225 Difference]: With dead ends: 75 [2020-10-12 09:59:10,542 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 09:59:10,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:59:10,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 09:59:10,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-12 09:59:10,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 09:59:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-12 09:59:10,592 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2020-10-12 09:59:10,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:10,592 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-12 09:59:10,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:59:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-12 09:59:10,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 09:59:10,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:10,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:10,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:59:10,595 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:10,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:10,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1167956326, now seen corresponding path program 1 times [2020-10-12 09:59:10,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:10,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131635787] [2020-10-12 09:59:10,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:10,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:10,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:10,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:10,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:10,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:10,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:10,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:12,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:15,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:15,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-12 09:59:15,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:59:15,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 09:59:15,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:15,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:59:15,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 09:59:15,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 09:59:15,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:15,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:15,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:15,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:15,664 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:15,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:15,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:59:15,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:15,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:15,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:15,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:15,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-12 09:59:15,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131635787] [2020-10-12 09:59:15,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:15,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:59:15,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853611944] [2020-10-12 09:59:15,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:59:15,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:15,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:59:15,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:59:15,678 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 5 states. [2020-10-12 09:59:15,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:15,855 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2020-10-12 09:59:15,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:59:15,856 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-12 09:59:15,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:15,858 INFO L225 Difference]: With dead ends: 80 [2020-10-12 09:59:15,859 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 09:59:15,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:59:15,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 09:59:15,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-12 09:59:15,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 09:59:15,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-10-12 09:59:15,871 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 35 [2020-10-12 09:59:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:15,872 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-10-12 09:59:15,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:59:15,872 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-10-12 09:59:15,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 09:59:15,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:15,874 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:15,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:59:15,875 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:15,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:15,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1255820446, now seen corresponding path program 2 times [2020-10-12 09:59:15,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:15,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304012996] [2020-10-12 09:59:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:15,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:15,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:15,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:15,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:15,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:16,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:18,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:20,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:20,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 09:59:20,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 09:59:20,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 09:59:20,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:20,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:59:20,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-12 09:59:20,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:59:20,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:20,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:20,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:20,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:20,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:20,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:20,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:20,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:20,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:20,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:20,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:20,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:20,949 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-12 09:59:20,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304012996] [2020-10-12 09:59:20,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:20,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:59:20,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451413877] [2020-10-12 09:59:20,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:59:20,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:20,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:59:20,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:59:20,954 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 6 states. [2020-10-12 09:59:21,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:21,187 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2020-10-12 09:59:21,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:59:21,188 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-12 09:59:21,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:21,189 INFO L225 Difference]: With dead ends: 95 [2020-10-12 09:59:21,190 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 09:59:21,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:59:21,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 09:59:21,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-12 09:59:21,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-12 09:59:21,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-10-12 09:59:21,211 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 43 [2020-10-12 09:59:21,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:21,211 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-10-12 09:59:21,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:59:21,212 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-10-12 09:59:21,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 09:59:21,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:21,216 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:21,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:59:21,218 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:21,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:21,218 INFO L82 PathProgramCache]: Analyzing trace with hash 2017193242, now seen corresponding path program 3 times [2020-10-12 09:59:21,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:21,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422136748] [2020-10-12 09:59:21,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:21,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:21,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:21,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:21,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:21,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:21,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:26,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:26,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 09:59:26,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:26,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:59:26,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:26,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:59:26,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:26,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 09:59:26,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:26,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:26,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:26,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:26,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:26,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:26,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:26,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:59:26,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:26,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:26,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:26,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:26,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 09:59:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-12 09:59:26,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422136748] [2020-10-12 09:59:26,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:26,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:59:26,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725807283] [2020-10-12 09:59:26,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:59:26,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:26,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:59:26,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:59:26,359 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 7 states. [2020-10-12 09:59:26,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:26,608 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2020-10-12 09:59:26,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:59:26,608 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 51 [2020-10-12 09:59:26,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:26,610 INFO L225 Difference]: With dead ends: 110 [2020-10-12 09:59:26,610 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 09:59:26,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:59:26,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 09:59:26,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-12 09:59:26,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-12 09:59:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-12 09:59:26,631 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 51 [2020-10-12 09:59:26,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:26,632 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-12 09:59:26,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:59:26,632 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-12 09:59:26,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 09:59:26,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:26,636 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:26,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:59:26,637 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:26,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:26,637 INFO L82 PathProgramCache]: Analyzing trace with hash 544374558, now seen corresponding path program 4 times [2020-10-12 09:59:26,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:26,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558198587] [2020-10-12 09:59:26,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:26,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:26,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:26,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:26,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:26,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:27,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:31,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:31,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 09:59:31,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:31,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:59:31,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:31,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:59:31,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-12 09:59:31,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:59:31,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:31,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:31,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:31,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:31,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:31,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:31,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:31,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:31,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:31,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:31,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:31,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-12 09:59:31,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558198587] [2020-10-12 09:59:31,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:31,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:59:31,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101988918] [2020-10-12 09:59:31,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:59:31,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:31,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:59:31,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:59:31,750 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 8 states. [2020-10-12 09:59:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:31,957 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2020-10-12 09:59:31,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:59:31,957 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 59 [2020-10-12 09:59:31,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:31,959 INFO L225 Difference]: With dead ends: 125 [2020-10-12 09:59:31,959 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 09:59:31,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:59:31,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 09:59:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-12 09:59:31,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 09:59:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2020-10-12 09:59:31,976 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 59 [2020-10-12 09:59:31,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:31,978 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2020-10-12 09:59:31,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:59:31,978 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2020-10-12 09:59:31,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 09:59:31,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:31,980 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:31,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:59:31,981 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:31,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:31,982 INFO L82 PathProgramCache]: Analyzing trace with hash 325227418, now seen corresponding path program 5 times [2020-10-12 09:59:31,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:31,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457128862] [2020-10-12 09:59:31,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:32,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:32,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:32,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:32,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:32,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:32,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:32,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:37,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:37,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 09:59:37,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:37,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:59:37,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:37,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:59:37,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 09:59:37,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 09:59:37,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:37,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:37,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:37,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:37,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:37,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:37,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:37,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:59:37,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:37,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:37,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:37,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:37,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-12 09:59:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-12 09:59:37,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457128862] [2020-10-12 09:59:37,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:37,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:59:37,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464974484] [2020-10-12 09:59:37,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:59:37,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:37,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:59:37,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:59:37,132 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand 9 states. [2020-10-12 09:59:37,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:37,351 INFO L93 Difference]: Finished difference Result 140 states and 163 transitions. [2020-10-12 09:59:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:59:37,352 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-10-12 09:59:37,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:37,353 INFO L225 Difference]: With dead ends: 140 [2020-10-12 09:59:37,353 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 09:59:37,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:59:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 09:59:37,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-12 09:59:37,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 09:59:37,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2020-10-12 09:59:37,370 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 67 [2020-10-12 09:59:37,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:37,371 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2020-10-12 09:59:37,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:59:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2020-10-12 09:59:37,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 09:59:37,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:37,374 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:37,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:59:37,375 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:37,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:37,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1206981022, now seen corresponding path program 6 times [2020-10-12 09:59:37,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:37,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579889966] [2020-10-12 09:59:37,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:37,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:37,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:37,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:37,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:37,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:38,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:42,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 09:59:42,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:42,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:59:42,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:42,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:59:42,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-12 09:59:42,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:59:42,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:42,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:42,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:42,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:42,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:42,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:42,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:42,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:42,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:42,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:42,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:42,507 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-12 09:59:42,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579889966] [2020-10-12 09:59:42,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:42,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:59:42,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007980135] [2020-10-12 09:59:42,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:59:42,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:42,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:59:42,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:59:42,510 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 10 states. [2020-10-12 09:59:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:42,710 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2020-10-12 09:59:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:59:42,710 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-10-12 09:59:42,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:42,712 INFO L225 Difference]: With dead ends: 155 [2020-10-12 09:59:42,712 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 09:59:42,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:59:42,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 09:59:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-12 09:59:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-12 09:59:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2020-10-12 09:59:42,724 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 75 [2020-10-12 09:59:42,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:42,724 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2020-10-12 09:59:42,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:59:42,724 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2020-10-12 09:59:42,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 09:59:42,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:42,726 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:42,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:59:42,726 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:42,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:42,726 INFO L82 PathProgramCache]: Analyzing trace with hash 192305690, now seen corresponding path program 7 times [2020-10-12 09:59:42,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:42,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99352935] [2020-10-12 09:59:42,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:42,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:42,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:42,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:43,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:47,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:47,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 09:59:47,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:47,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 09:59:47,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:47,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:59:47,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-12 09:59:47,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 09:59:47,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:47,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:47,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:47,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:47,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:47,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:47,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:47,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:47,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:47,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:47,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:47,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:47,841 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2020-10-12 09:59:47,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99352935] [2020-10-12 09:59:47,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:47,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:59:47,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979277100] [2020-10-12 09:59:47,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:59:47,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:47,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:59:47,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:59:47,844 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand 11 states. [2020-10-12 09:59:48,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:48,064 INFO L93 Difference]: Finished difference Result 170 states and 193 transitions. [2020-10-12 09:59:48,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:59:48,065 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 83 [2020-10-12 09:59:48,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:48,066 INFO L225 Difference]: With dead ends: 170 [2020-10-12 09:59:48,067 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 09:59:48,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:59:48,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 09:59:48,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-12 09:59:48,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-12 09:59:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2020-10-12 09:59:48,080 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 83 [2020-10-12 09:59:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:48,080 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2020-10-12 09:59:48,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:59:48,080 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2020-10-12 09:59:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-12 09:59:48,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:48,082 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:48,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:59:48,082 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:48,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1640627170, now seen corresponding path program 8 times [2020-10-12 09:59:48,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:48,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612554172] [2020-10-12 09:59:48,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:48,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:48,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:48,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:49,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:53,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 09:59:53,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:53,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:59:53,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:53,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:59:53,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-12 09:59:53,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:59:53,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:53,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:53,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:53,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:53,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:53,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:53,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:53,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:53,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:53,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:53,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:53,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:59:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-12 09:59:53,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612554172] [2020-10-12 09:59:53,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:53,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:59:53,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836002293] [2020-10-12 09:59:53,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:59:53,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:53,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:59:53,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:59:53,218 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand 12 states. [2020-10-12 09:59:53,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:53,478 INFO L93 Difference]: Finished difference Result 185 states and 208 transitions. [2020-10-12 09:59:53,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:59:53,478 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 91 [2020-10-12 09:59:53,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:53,479 INFO L225 Difference]: With dead ends: 185 [2020-10-12 09:59:53,480 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 09:59:53,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:59:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 09:59:53,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-10-12 09:59:53,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-12 09:59:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2020-10-12 09:59:53,497 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 91 [2020-10-12 09:59:53,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:53,498 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2020-10-12 09:59:53,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:59:53,511 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2020-10-12 09:59:53,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-12 09:59:53,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:53,513 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:53,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:59:53,514 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:53,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:53,514 INFO L82 PathProgramCache]: Analyzing trace with hash -32030566, now seen corresponding path program 9 times [2020-10-12 09:59:53,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:53,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937809680] [2020-10-12 09:59:53,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:53,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:53,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:54,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:58,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:58,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-12 09:59:58,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:59:58,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:59:58,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:58,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:59:58,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-12 09:59:58,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 09:59:58,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:58,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:59:58,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:58,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:58,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:59:58,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:59:58,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:59:58,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:59:58,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:59:58,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:59:58,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:59:58,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:59:58,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:59:58,659 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2020-10-12 09:59:58,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937809680] [2020-10-12 09:59:58,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:59:58,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:59:58,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618049488] [2020-10-12 09:59:58,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:59:58,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:59:58,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:59:58,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:59:58,661 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand 13 states. [2020-10-12 09:59:58,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:59:58,941 INFO L93 Difference]: Finished difference Result 200 states and 223 transitions. [2020-10-12 09:59:58,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:59:58,942 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 99 [2020-10-12 09:59:58,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:59:58,943 INFO L225 Difference]: With dead ends: 200 [2020-10-12 09:59:58,943 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 09:59:58,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:59:58,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 09:59:58,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-10-12 09:59:58,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-12 09:59:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2020-10-12 09:59:58,953 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 99 [2020-10-12 09:59:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:59:58,954 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2020-10-12 09:59:58,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:59:58,954 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2020-10-12 09:59:58,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-12 09:59:58,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:59:58,955 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:59:58,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:59:58,955 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:59:58,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:59:58,956 INFO L82 PathProgramCache]: Analyzing trace with hash 35739294, now seen corresponding path program 10 times [2020-10-12 09:59:58,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:59:58,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713655474] [2020-10-12 09:59:58,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:59:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:59:58,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:59,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:59,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:59,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:59:59,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:00,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:03,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:03,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-12 10:00:03,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:03,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:00:03,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:03,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:00:03,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-12 10:00:03,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:00:03,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:04,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:04,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:04,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:04,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:04,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:04,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:04,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:04,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:04,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:04,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:04,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:04,106 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2020-10-12 10:00:04,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713655474] [2020-10-12 10:00:04,107 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:04,107 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:00:04,107 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327319900] [2020-10-12 10:00:04,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:00:04,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:04,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:00:04,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:00:04,109 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand 14 states. [2020-10-12 10:00:04,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:04,369 INFO L93 Difference]: Finished difference Result 215 states and 238 transitions. [2020-10-12 10:00:04,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:00:04,370 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 107 [2020-10-12 10:00:04,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:04,371 INFO L225 Difference]: With dead ends: 215 [2020-10-12 10:00:04,371 INFO L226 Difference]: Without dead ends: 120 [2020-10-12 10:00:04,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:00:04,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-12 10:00:04,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-12 10:00:04,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-12 10:00:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2020-10-12 10:00:04,381 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 107 [2020-10-12 10:00:04,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:04,381 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2020-10-12 10:00:04,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:00:04,381 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2020-10-12 10:00:04,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-12 10:00:04,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:04,383 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:04,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:00:04,383 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:04,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:04,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1494923494, now seen corresponding path program 11 times [2020-10-12 10:00:04,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:04,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245489983] [2020-10-12 10:00:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:04,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:04,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:04,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:04,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:04,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:04,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:06,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:09,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:09,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-12 10:00:09,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:09,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:00:09,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:00:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-12 10:00:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 10:00:09,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:09,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:09,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:09,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:09,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:09,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:09,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:09,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:09,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:09,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:09,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:09,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:09,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:09,550 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked. [2020-10-12 10:00:09,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245489983] [2020-10-12 10:00:09,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:09,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:00:09,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742412036] [2020-10-12 10:00:09,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:00:09,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:09,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:00:09,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:00:09,552 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand 15 states. [2020-10-12 10:00:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:09,889 INFO L93 Difference]: Finished difference Result 230 states and 253 transitions. [2020-10-12 10:00:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:00:09,889 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 115 [2020-10-12 10:00:09,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:09,891 INFO L225 Difference]: With dead ends: 230 [2020-10-12 10:00:09,891 INFO L226 Difference]: Without dead ends: 128 [2020-10-12 10:00:09,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:00:09,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-12 10:00:09,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-10-12 10:00:09,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-12 10:00:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2020-10-12 10:00:09,901 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 115 [2020-10-12 10:00:09,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:09,901 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2020-10-12 10:00:09,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:00:09,901 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2020-10-12 10:00:09,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-12 10:00:09,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:09,903 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:09,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:00:09,903 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:09,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:09,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1418922270, now seen corresponding path program 12 times [2020-10-12 10:00:09,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:09,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100082424] [2020-10-12 10:00:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:09,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:09,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:10,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:10,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:10,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:12,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:14,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:14,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-12 10:00:14,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:14,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 10:00:14,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:14,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:00:14,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-12 10:00:14,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 10:00:14,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:15,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:15,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:15,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:15,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:15,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:15,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:15,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:15,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:15,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:15,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:15,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 624 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 546 trivial. 0 not checked. [2020-10-12 10:00:15,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100082424] [2020-10-12 10:00:15,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:15,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:00:15,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684884976] [2020-10-12 10:00:15,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:00:15,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:15,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:00:15,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:00:15,087 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand 16 states. [2020-10-12 10:00:15,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:15,385 INFO L93 Difference]: Finished difference Result 245 states and 268 transitions. [2020-10-12 10:00:15,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:00:15,386 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 123 [2020-10-12 10:00:15,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:15,387 INFO L225 Difference]: With dead ends: 245 [2020-10-12 10:00:15,387 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 10:00:15,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:00:15,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 10:00:15,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2020-10-12 10:00:15,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-12 10:00:15,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 144 transitions. [2020-10-12 10:00:15,398 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 144 transitions. Word has length 123 [2020-10-12 10:00:15,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:15,398 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 144 transitions. [2020-10-12 10:00:15,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:00:15,398 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 144 transitions. [2020-10-12 10:00:15,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-12 10:00:15,400 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:15,401 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:15,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:00:15,401 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:15,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:15,401 INFO L82 PathProgramCache]: Analyzing trace with hash -545231462, now seen corresponding path program 13 times [2020-10-12 10:00:15,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:15,402 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137177603] [2020-10-12 10:00:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:15,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:15,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:15,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:15,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:15,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:19,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:20,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:20,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-12 10:00:20,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 10:00:20,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:00:20,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:20,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:00:20,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-12 10:00:20,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:00:20,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:20,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:20,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:20,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:20,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:20,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:20,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:20,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:20,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:20,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:20,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:20,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:20,604 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 637 trivial. 0 not checked. [2020-10-12 10:00:20,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137177603] [2020-10-12 10:00:20,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:20,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:00:20,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951620428] [2020-10-12 10:00:20,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:00:20,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:20,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:00:20,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:00:20,606 INFO L87 Difference]: Start difference. First operand 136 states and 144 transitions. Second operand 17 states. [2020-10-12 10:00:20,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:20,975 INFO L93 Difference]: Finished difference Result 260 states and 283 transitions. [2020-10-12 10:00:20,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:00:20,976 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 131 [2020-10-12 10:00:20,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:20,977 INFO L225 Difference]: With dead ends: 260 [2020-10-12 10:00:20,977 INFO L226 Difference]: Without dead ends: 144 [2020-10-12 10:00:20,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:00:20,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-12 10:00:20,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-12 10:00:20,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-12 10:00:20,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2020-10-12 10:00:20,986 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 131 [2020-10-12 10:00:20,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:20,987 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2020-10-12 10:00:20,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:00:20,987 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2020-10-12 10:00:20,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-12 10:00:20,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:20,988 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:20,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:00:20,989 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:20,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:20,989 INFO L82 PathProgramCache]: Analyzing trace with hash 2020285342, now seen corresponding path program 14 times [2020-10-12 10:00:20,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:20,990 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257123353] [2020-10-12 10:00:20,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:21,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:21,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:21,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:21,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:21,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:26,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:26,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-12 10:00:26,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:00:26,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:00:26,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:26,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:00:26,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:26,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 10:00:26,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:26,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:26,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:26,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:26,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:26,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:26,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:26,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:26,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:26,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:26,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:26,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2020-10-12 10:00:26,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257123353] [2020-10-12 10:00:26,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:26,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:00:26,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205930295] [2020-10-12 10:00:26,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:00:26,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:26,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:00:26,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:00:26,215 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand 18 states. [2020-10-12 10:00:26,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:26,577 INFO L93 Difference]: Finished difference Result 275 states and 298 transitions. [2020-10-12 10:00:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:00:26,578 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 139 [2020-10-12 10:00:26,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:26,579 INFO L225 Difference]: With dead ends: 275 [2020-10-12 10:00:26,579 INFO L226 Difference]: Without dead ends: 152 [2020-10-12 10:00:26,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:00:26,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-12 10:00:26,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2020-10-12 10:00:26,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-12 10:00:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 160 transitions. [2020-10-12 10:00:26,592 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 160 transitions. Word has length 139 [2020-10-12 10:00:26,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:26,593 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 160 transitions. [2020-10-12 10:00:26,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:00:26,593 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 160 transitions. [2020-10-12 10:00:26,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-12 10:00:26,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:26,595 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:26,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:00:26,595 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:26,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:26,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1618430950, now seen corresponding path program 15 times [2020-10-12 10:00:26,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:26,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981958459] [2020-10-12 10:00:26,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:26,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:26,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:26,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:26,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:26,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:31,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:31,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-12 10:00:31,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:00:31,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 10:00:31,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:31,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:00:31,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 79 [2020-10-12 10:00:31,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 10:00:31,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:31,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:31,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:31,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:31,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:31,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:31,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:31,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:31,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:31,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:31,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:31,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 960 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-10-12 10:00:31,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981958459] [2020-10-12 10:00:31,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:31,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:00:31,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960087141] [2020-10-12 10:00:31,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:00:31,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:31,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:00:31,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:00:31,830 INFO L87 Difference]: Start difference. First operand 152 states and 160 transitions. Second operand 19 states. [2020-10-12 10:00:32,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:32,200 INFO L93 Difference]: Finished difference Result 290 states and 313 transitions. [2020-10-12 10:00:32,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:00:32,201 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 147 [2020-10-12 10:00:32,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:32,202 INFO L225 Difference]: With dead ends: 290 [2020-10-12 10:00:32,202 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 10:00:32,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:00:32,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 10:00:32,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-12 10:00:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-12 10:00:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 168 transitions. [2020-10-12 10:00:32,210 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 168 transitions. Word has length 147 [2020-10-12 10:00:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:32,211 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 168 transitions. [2020-10-12 10:00:32,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:00:32,211 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 168 transitions. [2020-10-12 10:00:32,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-12 10:00:32,212 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:32,212 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:32,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:00:32,213 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:32,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:32,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1384746526, now seen corresponding path program 16 times [2020-10-12 10:00:32,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:32,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994437565] [2020-10-12 10:00:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:32,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:32,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:32,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:32,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:32,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:37,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:37,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-12 10:00:37,238 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:00:37,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 10:00:37,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:37,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:00:37,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-12 10:00:37,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 10:00:37,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:37,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:37,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:37,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:37,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:37,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:37,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:00:37,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:37,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:37,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:37,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:37,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1088 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 952 trivial. 0 not checked. [2020-10-12 10:00:37,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994437565] [2020-10-12 10:00:37,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:37,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:00:37,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359556185] [2020-10-12 10:00:37,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:00:37,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:37,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:00:37,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:00:37,458 INFO L87 Difference]: Start difference. First operand 160 states and 168 transitions. Second operand 20 states. [2020-10-12 10:00:37,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:37,864 INFO L93 Difference]: Finished difference Result 305 states and 328 transitions. [2020-10-12 10:00:37,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:00:37,865 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 155 [2020-10-12 10:00:37,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:37,867 INFO L225 Difference]: With dead ends: 305 [2020-10-12 10:00:37,867 INFO L226 Difference]: Without dead ends: 168 [2020-10-12 10:00:37,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:00:37,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-12 10:00:37,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-10-12 10:00:37,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-12 10:00:37,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 176 transitions. [2020-10-12 10:00:37,876 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 176 transitions. Word has length 155 [2020-10-12 10:00:37,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:37,877 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 176 transitions. [2020-10-12 10:00:37,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:00:37,877 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 176 transitions. [2020-10-12 10:00:37,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-12 10:00:37,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:37,879 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:37,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:00:37,879 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:37,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:37,880 INFO L82 PathProgramCache]: Analyzing trace with hash -56747366, now seen corresponding path program 17 times [2020-10-12 10:00:37,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:37,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722838082] [2020-10-12 10:00:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:37,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:37,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:38,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:38,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:38,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:42,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:42,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-12 10:00:42,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:00:42,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-12 10:00:42,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:42,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:00:42,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-12 10:00:42,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 10:00:42,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:43,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:43,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:43,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:43,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:43,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:43,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:43,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:43,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:43,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:43,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:43,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:43,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:43,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1224 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2020-10-12 10:00:43,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722838082] [2020-10-12 10:00:43,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:43,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:00:43,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922938631] [2020-10-12 10:00:43,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:00:43,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:43,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:00:43,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:00:43,173 INFO L87 Difference]: Start difference. First operand 168 states and 176 transitions. Second operand 21 states. [2020-10-12 10:00:43,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:43,572 INFO L93 Difference]: Finished difference Result 320 states and 343 transitions. [2020-10-12 10:00:43,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 10:00:43,572 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 163 [2020-10-12 10:00:43,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:43,575 INFO L225 Difference]: With dead ends: 320 [2020-10-12 10:00:43,575 INFO L226 Difference]: Without dead ends: 176 [2020-10-12 10:00:43,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:00:43,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-12 10:00:43,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2020-10-12 10:00:43,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-12 10:00:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 184 transitions. [2020-10-12 10:00:43,586 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 184 transitions. Word has length 163 [2020-10-12 10:00:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:43,586 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 184 transitions. [2020-10-12 10:00:43,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:00:43,586 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 184 transitions. [2020-10-12 10:00:43,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-12 10:00:43,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:43,588 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:43,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:00:43,589 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:43,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:43,589 INFO L82 PathProgramCache]: Analyzing trace with hash -909221730, now seen corresponding path program 18 times [2020-10-12 10:00:43,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:43,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631328414] [2020-10-12 10:00:43,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:43,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:43,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:43,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:43,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:43,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:48,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:48,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-12 10:00:48,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:00:48,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-12 10:00:48,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:48,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:00:48,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-12 10:00:48,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 10:00:48,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:48,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:48,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:48,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:48,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:48,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:48,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:48,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:48,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:48,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:48,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:48,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2020-10-12 10:00:48,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631328414] [2020-10-12 10:00:48,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:48,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:00:48,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140810413] [2020-10-12 10:00:48,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:00:48,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:48,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:00:48,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:00:48,905 INFO L87 Difference]: Start difference. First operand 176 states and 184 transitions. Second operand 22 states. [2020-10-12 10:00:49,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:49,326 INFO L93 Difference]: Finished difference Result 335 states and 358 transitions. [2020-10-12 10:00:49,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:00:49,326 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 171 [2020-10-12 10:00:49,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:49,328 INFO L225 Difference]: With dead ends: 335 [2020-10-12 10:00:49,328 INFO L226 Difference]: Without dead ends: 184 [2020-10-12 10:00:49,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:00:49,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-12 10:00:49,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2020-10-12 10:00:49,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-12 10:00:49,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 192 transitions. [2020-10-12 10:00:49,339 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 192 transitions. Word has length 171 [2020-10-12 10:00:49,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:49,339 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 192 transitions. [2020-10-12 10:00:49,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:00:49,340 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 192 transitions. [2020-10-12 10:00:49,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-12 10:00:49,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:49,341 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:49,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:00:49,341 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:49,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:49,342 INFO L82 PathProgramCache]: Analyzing trace with hash 710975770, now seen corresponding path program 19 times [2020-10-12 10:00:49,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:49,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967213000] [2020-10-12 10:00:49,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:49,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:49,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:49,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:49,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:49,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:54,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:54,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-12 10:00:54,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:00:54,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-12 10:00:54,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:54,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:00:54,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:00:54,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 10:00:54,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:54,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:00:54,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:54,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:54,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:00:54,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:00:54,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:00:54,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:00:54,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:00:54,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:00:54,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:00:54,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:00:54,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:00:54,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 1330 trivial. 0 not checked. [2020-10-12 10:00:54,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967213000] [2020-10-12 10:00:54,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:00:54,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:00:54,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551948849] [2020-10-12 10:00:54,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:00:54,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:00:54,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:00:54,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:00:54,683 INFO L87 Difference]: Start difference. First operand 184 states and 192 transitions. Second operand 23 states. [2020-10-12 10:00:55,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:00:55,108 INFO L93 Difference]: Finished difference Result 350 states and 373 transitions. [2020-10-12 10:00:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:00:55,108 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 179 [2020-10-12 10:00:55,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:00:55,110 INFO L225 Difference]: With dead ends: 350 [2020-10-12 10:00:55,110 INFO L226 Difference]: Without dead ends: 192 [2020-10-12 10:00:55,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:00:55,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-12 10:00:55,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-10-12 10:00:55,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-12 10:00:55,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 200 transitions. [2020-10-12 10:00:55,119 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 200 transitions. Word has length 179 [2020-10-12 10:00:55,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:00:55,120 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 200 transitions. [2020-10-12 10:00:55,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:00:55,120 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 200 transitions. [2020-10-12 10:00:55,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-12 10:00:55,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:00:55,121 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:00:55,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:00:55,122 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:00:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:00:55,122 INFO L82 PathProgramCache]: Analyzing trace with hash -954625250, now seen corresponding path program 20 times [2020-10-12 10:00:55,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:00:55,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16515293] [2020-10-12 10:00:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:00:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:00:55,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:55,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:55,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:55,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:00:55,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:00,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:00,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-12 10:01:00,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:00,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-12 10:01:00,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:00,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:01:00,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-12 10:01:00,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 10:01:00,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:00,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:00,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:00,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:00,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:00,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:00,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:00,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:00,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:00,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:00,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:00,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1470 trivial. 0 not checked. [2020-10-12 10:01:00,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16515293] [2020-10-12 10:01:00,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:00,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:01:00,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502082617] [2020-10-12 10:01:00,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:01:00,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:00,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:01:00,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:01:00,473 INFO L87 Difference]: Start difference. First operand 192 states and 200 transitions. Second operand 24 states. [2020-10-12 10:01:00,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:00,924 INFO L93 Difference]: Finished difference Result 365 states and 388 transitions. [2020-10-12 10:01:00,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:01:00,925 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 187 [2020-10-12 10:01:00,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:00,926 INFO L225 Difference]: With dead ends: 365 [2020-10-12 10:01:00,926 INFO L226 Difference]: Without dead ends: 200 [2020-10-12 10:01:00,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:01:00,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-12 10:01:00,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2020-10-12 10:01:00,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-12 10:01:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 208 transitions. [2020-10-12 10:01:00,936 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 208 transitions. Word has length 187 [2020-10-12 10:01:00,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:00,937 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 208 transitions. [2020-10-12 10:01:00,937 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:01:00,937 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 208 transitions. [2020-10-12 10:01:00,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-12 10:01:00,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:00,938 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:00,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:01:00,939 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:00,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:00,939 INFO L82 PathProgramCache]: Analyzing trace with hash 2054178714, now seen corresponding path program 21 times [2020-10-12 10:01:00,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:00,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030190187] [2020-10-12 10:01:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:00,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:01,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:01,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:01,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:01,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:05,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:05,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-12 10:01:05,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:05,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 10:01:05,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:05,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:01:05,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-12 10:01:05,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 10:01:05,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:06,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:06,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:06,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:06,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:06,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:06,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:01:06,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:06,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:06,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:06,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:06,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1848 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-12 10:01:06,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030190187] [2020-10-12 10:01:06,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:06,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:01:06,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476768968] [2020-10-12 10:01:06,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:01:06,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:06,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:01:06,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:01:06,325 INFO L87 Difference]: Start difference. First operand 200 states and 208 transitions. Second operand 25 states. [2020-10-12 10:01:06,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:06,790 INFO L93 Difference]: Finished difference Result 380 states and 403 transitions. [2020-10-12 10:01:06,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:01:06,793 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 195 [2020-10-12 10:01:06,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:06,795 INFO L225 Difference]: With dead ends: 380 [2020-10-12 10:01:06,795 INFO L226 Difference]: Without dead ends: 208 [2020-10-12 10:01:06,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:01:06,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-12 10:01:06,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2020-10-12 10:01:06,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-12 10:01:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 216 transitions. [2020-10-12 10:01:06,808 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 216 transitions. Word has length 195 [2020-10-12 10:01:06,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:06,809 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 216 transitions. [2020-10-12 10:01:06,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:01:06,809 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 216 transitions. [2020-10-12 10:01:06,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-12 10:01:06,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:06,811 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:06,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:01:06,811 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:06,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:06,811 INFO L82 PathProgramCache]: Analyzing trace with hash 894117278, now seen corresponding path program 22 times [2020-10-12 10:01:06,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:06,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52943714] [2020-10-12 10:01:06,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:06,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:06,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:07,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:07,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:07,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:07,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:11,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:11,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 211 [2020-10-12 10:01:11,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:11,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 10:01:11,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:11,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:01:11,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-12 10:01:11,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:01:11,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:12,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:12,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:12,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:12,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:12,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:12,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:12,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:12,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:12,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:12,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:12,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:12,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:12,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2024 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1771 trivial. 0 not checked. [2020-10-12 10:01:12,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52943714] [2020-10-12 10:01:12,225 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:12,225 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:01:12,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631910277] [2020-10-12 10:01:12,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:01:12,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:12,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:01:12,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:01:12,227 INFO L87 Difference]: Start difference. First operand 208 states and 216 transitions. Second operand 26 states. [2020-10-12 10:01:12,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:12,713 INFO L93 Difference]: Finished difference Result 395 states and 418 transitions. [2020-10-12 10:01:12,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:01:12,713 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 203 [2020-10-12 10:01:12,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:12,716 INFO L225 Difference]: With dead ends: 395 [2020-10-12 10:01:12,716 INFO L226 Difference]: Without dead ends: 216 [2020-10-12 10:01:12,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:01:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-12 10:01:12,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-10-12 10:01:12,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-12 10:01:12,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 224 transitions. [2020-10-12 10:01:12,730 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 224 transitions. Word has length 203 [2020-10-12 10:01:12,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:12,730 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 224 transitions. [2020-10-12 10:01:12,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:01:12,730 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 224 transitions. [2020-10-12 10:01:12,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-12 10:01:12,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:12,732 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:12,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:01:12,732 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:12,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:12,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1550650906, now seen corresponding path program 23 times [2020-10-12 10:01:12,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:12,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567189113] [2020-10-12 10:01:12,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:12,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:13,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:13,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:13,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:13,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:17,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:17,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-12 10:01:17,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:17,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 10:01:17,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:17,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:01:17,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-12 10:01:17,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 10:01:17,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:18,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:18,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:18,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:18,306 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:18,306 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:18,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:18,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:18,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:18,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:18,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:18,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:01:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2208 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1932 trivial. 0 not checked. [2020-10-12 10:01:18,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567189113] [2020-10-12 10:01:18,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:18,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:01:18,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865470921] [2020-10-12 10:01:18,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:01:18,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:18,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:01:18,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:01:18,352 INFO L87 Difference]: Start difference. First operand 216 states and 224 transitions. Second operand 27 states. [2020-10-12 10:01:18,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:18,975 INFO L93 Difference]: Finished difference Result 410 states and 433 transitions. [2020-10-12 10:01:18,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:01:18,975 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 211 [2020-10-12 10:01:18,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:18,977 INFO L225 Difference]: With dead ends: 410 [2020-10-12 10:01:18,978 INFO L226 Difference]: Without dead ends: 224 [2020-10-12 10:01:18,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:01:18,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-12 10:01:18,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2020-10-12 10:01:18,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-12 10:01:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 232 transitions. [2020-10-12 10:01:18,989 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 232 transitions. Word has length 211 [2020-10-12 10:01:18,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:18,989 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 232 transitions. [2020-10-12 10:01:18,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:01:18,990 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 232 transitions. [2020-10-12 10:01:18,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-12 10:01:18,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:18,991 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:18,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:01:18,992 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:18,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:18,992 INFO L82 PathProgramCache]: Analyzing trace with hash 21174302, now seen corresponding path program 24 times [2020-10-12 10:01:18,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:18,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579585943] [2020-10-12 10:01:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:19,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:19,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:19,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:19,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:19,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:24,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:24,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-12 10:01:24,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:24,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 10:01:24,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:24,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:01:24,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-12 10:01:24,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 10:01:24,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:24,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:24,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:24,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:24,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:24,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:24,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:24,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:24,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:24,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:24,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:24,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2400 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 2100 trivial. 0 not checked. [2020-10-12 10:01:24,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579585943] [2020-10-12 10:01:24,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:24,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 10:01:24,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924071321] [2020-10-12 10:01:24,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 10:01:24,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:24,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 10:01:24,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:01:24,564 INFO L87 Difference]: Start difference. First operand 224 states and 232 transitions. Second operand 28 states. [2020-10-12 10:01:25,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:25,088 INFO L93 Difference]: Finished difference Result 425 states and 448 transitions. [2020-10-12 10:01:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:01:25,089 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 219 [2020-10-12 10:01:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:25,090 INFO L225 Difference]: With dead ends: 425 [2020-10-12 10:01:25,091 INFO L226 Difference]: Without dead ends: 232 [2020-10-12 10:01:25,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:01:25,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-12 10:01:25,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-10-12 10:01:25,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-12 10:01:25,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 240 transitions. [2020-10-12 10:01:25,100 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 240 transitions. Word has length 219 [2020-10-12 10:01:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:25,100 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 240 transitions. [2020-10-12 10:01:25,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 10:01:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 240 transitions. [2020-10-12 10:01:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-12 10:01:25,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:25,102 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:25,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:01:25,103 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:25,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:25,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1576465562, now seen corresponding path program 25 times [2020-10-12 10:01:25,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:25,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345386079] [2020-10-12 10:01:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:25,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:25,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:25,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:25,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:25,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:30,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:30,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-12 10:01:30,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:30,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:01:30,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:30,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:01:30,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-12 10:01:30,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:01:30,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:30,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:30,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:30,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:30,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:30,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:30,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:30,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:30,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:30,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:30,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:30,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:01:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2600 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 2275 trivial. 0 not checked. [2020-10-12 10:01:30,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345386079] [2020-10-12 10:01:30,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:30,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:01:30,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112434823] [2020-10-12 10:01:30,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:01:30,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:30,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:01:30,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:01:30,610 INFO L87 Difference]: Start difference. First operand 232 states and 240 transitions. Second operand 29 states. [2020-10-12 10:01:31,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:31,127 INFO L93 Difference]: Finished difference Result 440 states and 463 transitions. [2020-10-12 10:01:31,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 10:01:31,127 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 227 [2020-10-12 10:01:31,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:31,129 INFO L225 Difference]: With dead ends: 440 [2020-10-12 10:01:31,129 INFO L226 Difference]: Without dead ends: 240 [2020-10-12 10:01:31,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:01:31,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-12 10:01:31,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-10-12 10:01:31,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-12 10:01:31,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 248 transitions. [2020-10-12 10:01:31,139 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 248 transitions. Word has length 227 [2020-10-12 10:01:31,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:31,139 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 248 transitions. [2020-10-12 10:01:31,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:01:31,139 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 248 transitions. [2020-10-12 10:01:31,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-12 10:01:31,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:31,141 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:31,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:01:31,142 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:31,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:31,144 INFO L82 PathProgramCache]: Analyzing trace with hash 434203294, now seen corresponding path program 26 times [2020-10-12 10:01:31,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:31,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132259551] [2020-10-12 10:01:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:31,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:31,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:31,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:31,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:31,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:36,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:36,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 243 [2020-10-12 10:01:36,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:36,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:01:36,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:36,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 10:01:36,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 123 [2020-10-12 10:01:36,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 10:01:36,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:36,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:36,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:36,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:36,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:36,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:36,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:36,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:36,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:36,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:36,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:36,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2808 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 2457 trivial. 0 not checked. [2020-10-12 10:01:36,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132259551] [2020-10-12 10:01:36,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:36,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:01:36,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278597341] [2020-10-12 10:01:36,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:01:36,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:36,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:01:36,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:01:36,717 INFO L87 Difference]: Start difference. First operand 240 states and 248 transitions. Second operand 30 states. [2020-10-12 10:01:37,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:37,257 INFO L93 Difference]: Finished difference Result 455 states and 478 transitions. [2020-10-12 10:01:37,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:01:37,257 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 235 [2020-10-12 10:01:37,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:37,260 INFO L225 Difference]: With dead ends: 455 [2020-10-12 10:01:37,260 INFO L226 Difference]: Without dead ends: 248 [2020-10-12 10:01:37,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:01:37,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-12 10:01:37,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2020-10-12 10:01:37,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-12 10:01:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 256 transitions. [2020-10-12 10:01:37,270 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 256 transitions. Word has length 235 [2020-10-12 10:01:37,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:37,270 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 256 transitions. [2020-10-12 10:01:37,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:01:37,270 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 256 transitions. [2020-10-12 10:01:37,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-12 10:01:37,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:37,272 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:37,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 10:01:37,272 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:37,273 INFO L82 PathProgramCache]: Analyzing trace with hash 716045082, now seen corresponding path program 27 times [2020-10-12 10:01:37,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:37,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [543137556] [2020-10-12 10:01:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:37,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:37,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:37,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:37,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:37,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:38,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:42,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:42,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-12 10:01:42,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:42,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-12 10:01:42,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:42,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:01:42,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-12 10:01:42,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 10:01:42,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:42,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:42,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:42,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:42,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:42,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:42,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:42,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:42,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:42,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:42,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:42,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:42,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3024 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 2646 trivial. 0 not checked. [2020-10-12 10:01:42,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [543137556] [2020-10-12 10:01:42,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:42,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:01:42,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122430957] [2020-10-12 10:01:42,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:01:42,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:42,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:01:42,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:01:42,862 INFO L87 Difference]: Start difference. First operand 248 states and 256 transitions. Second operand 31 states. [2020-10-12 10:01:43,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:43,489 INFO L93 Difference]: Finished difference Result 470 states and 493 transitions. [2020-10-12 10:01:43,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:01:43,489 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 243 [2020-10-12 10:01:43,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:43,491 INFO L225 Difference]: With dead ends: 470 [2020-10-12 10:01:43,492 INFO L226 Difference]: Without dead ends: 256 [2020-10-12 10:01:43,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:01:43,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-12 10:01:43,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2020-10-12 10:01:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-10-12 10:01:43,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 264 transitions. [2020-10-12 10:01:43,502 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 264 transitions. Word has length 243 [2020-10-12 10:01:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:43,502 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 264 transitions. [2020-10-12 10:01:43,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:01:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 264 transitions. [2020-10-12 10:01:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-12 10:01:43,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:43,504 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:43,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 10:01:43,504 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:43,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:43,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1879448862, now seen corresponding path program 28 times [2020-10-12 10:01:43,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:43,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308142584] [2020-10-12 10:01:43,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:43,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:43,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:43,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:43,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:44,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:48,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:48,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-12 10:01:48,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:48,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-12 10:01:48,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:48,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:01:48,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 131 [2020-10-12 10:01:48,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 10:01:48,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:49,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:49,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:49,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:49,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:49,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:49,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:49,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:49,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:49,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:49,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:49,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3248 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2842 trivial. 0 not checked. [2020-10-12 10:01:49,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308142584] [2020-10-12 10:01:49,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:49,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 10:01:49,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064577035] [2020-10-12 10:01:49,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 10:01:49,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:49,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 10:01:49,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:01:49,131 INFO L87 Difference]: Start difference. First operand 256 states and 264 transitions. Second operand 32 states. [2020-10-12 10:01:49,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:49,769 INFO L93 Difference]: Finished difference Result 485 states and 508 transitions. [2020-10-12 10:01:49,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:01:49,770 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 251 [2020-10-12 10:01:49,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:49,772 INFO L225 Difference]: With dead ends: 485 [2020-10-12 10:01:49,773 INFO L226 Difference]: Without dead ends: 264 [2020-10-12 10:01:49,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:01:49,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-12 10:01:49,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2020-10-12 10:01:49,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-12 10:01:49,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 272 transitions. [2020-10-12 10:01:49,783 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 272 transitions. Word has length 251 [2020-10-12 10:01:49,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:49,783 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 272 transitions. [2020-10-12 10:01:49,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 10:01:49,783 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 272 transitions. [2020-10-12 10:01:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-12 10:01:49,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:49,785 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:49,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 10:01:49,785 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:49,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:49,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1942871654, now seen corresponding path program 29 times [2020-10-12 10:01:49,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:49,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739760608] [2020-10-12 10:01:49,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:49,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:49,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:50,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:50,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:50,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:50,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:54,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:54,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-12 10:01:54,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:01:54,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 10:01:54,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:54,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:01:54,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:01:54,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 10:01:54,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:55,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:01:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:55,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:55,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:01:55,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:01:55,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:01:55,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:01:55,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:01:55,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:01:55,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:01:55,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:01:55,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:01:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3480 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 3045 trivial. 0 not checked. [2020-10-12 10:01:55,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739760608] [2020-10-12 10:01:55,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:01:55,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:01:55,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517430213] [2020-10-12 10:01:55,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:01:55,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:01:55,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:01:55,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:01:55,402 INFO L87 Difference]: Start difference. First operand 264 states and 272 transitions. Second operand 33 states. [2020-10-12 10:01:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:01:56,085 INFO L93 Difference]: Finished difference Result 500 states and 523 transitions. [2020-10-12 10:01:56,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:01:56,085 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 259 [2020-10-12 10:01:56,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:01:56,087 INFO L225 Difference]: With dead ends: 500 [2020-10-12 10:01:56,088 INFO L226 Difference]: Without dead ends: 272 [2020-10-12 10:01:56,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:01:56,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-12 10:01:56,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2020-10-12 10:01:56,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-12 10:01:56,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 280 transitions. [2020-10-12 10:01:56,096 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 280 transitions. Word has length 259 [2020-10-12 10:01:56,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:01:56,097 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 280 transitions. [2020-10-12 10:01:56,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:01:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 280 transitions. [2020-10-12 10:01:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-12 10:01:56,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:01:56,099 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:01:56,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 10:01:56,099 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:01:56,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:01:56,100 INFO L82 PathProgramCache]: Analyzing trace with hash -158257250, now seen corresponding path program 30 times [2020-10-12 10:01:56,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:01:56,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681986753] [2020-10-12 10:01:56,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:01:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:01:56,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:56,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:56,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:56,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:01:56,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:01,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:01,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 275 [2020-10-12 10:02:01,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:01,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-12 10:02:01,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:01,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:02:01,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 107 [2020-10-12 10:02:01,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 10:02:01,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:01,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:01,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:01,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:01,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:01,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:01,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:01,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:01,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:01,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:01,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:01,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:01,772 INFO L134 CoverageAnalysis]: Checked inductivity of 3720 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 3255 trivial. 0 not checked. [2020-10-12 10:02:01,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681986753] [2020-10-12 10:02:01,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:01,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:02:01,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268434996] [2020-10-12 10:02:01,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:02:01,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:01,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:02:01,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:02:01,774 INFO L87 Difference]: Start difference. First operand 272 states and 280 transitions. Second operand 34 states. [2020-10-12 10:02:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:02,486 INFO L93 Difference]: Finished difference Result 515 states and 538 transitions. [2020-10-12 10:02:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:02:02,486 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 267 [2020-10-12 10:02:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:02,488 INFO L225 Difference]: With dead ends: 515 [2020-10-12 10:02:02,488 INFO L226 Difference]: Without dead ends: 280 [2020-10-12 10:02:02,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:02:02,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-12 10:02:02,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2020-10-12 10:02:02,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-10-12 10:02:02,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 288 transitions. [2020-10-12 10:02:02,497 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 288 transitions. Word has length 267 [2020-10-12 10:02:02,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:02,498 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 288 transitions. [2020-10-12 10:02:02,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:02:02,498 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 288 transitions. [2020-10-12 10:02:02,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-12 10:02:02,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:02,500 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:02,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 10:02:02,500 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:02,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:02,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1780705306, now seen corresponding path program 31 times [2020-10-12 10:02:02,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:02,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896080608] [2020-10-12 10:02:02,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:02,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:02,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:02,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:02,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:03,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:07,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:07,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 283 [2020-10-12 10:02:07,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:07,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-12 10:02:07,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:07,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:02:07,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 110 [2020-10-12 10:02:07,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 10:02:07,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:08,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:08,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:08,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:08,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:08,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:08,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:08,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:08,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:08,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:08,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:08,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:08,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3968 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 3472 trivial. 0 not checked. [2020-10-12 10:02:08,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896080608] [2020-10-12 10:02:08,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:08,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:02:08,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874611257] [2020-10-12 10:02:08,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:02:08,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:08,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:02:08,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:02:08,236 INFO L87 Difference]: Start difference. First operand 280 states and 288 transitions. Second operand 35 states. [2020-10-12 10:02:08,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:08,885 INFO L93 Difference]: Finished difference Result 530 states and 553 transitions. [2020-10-12 10:02:08,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:02:08,886 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 275 [2020-10-12 10:02:08,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:08,888 INFO L225 Difference]: With dead ends: 530 [2020-10-12 10:02:08,888 INFO L226 Difference]: Without dead ends: 288 [2020-10-12 10:02:08,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:02:08,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-12 10:02:08,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2020-10-12 10:02:08,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-12 10:02:08,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 296 transitions. [2020-10-12 10:02:08,898 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 296 transitions. Word has length 275 [2020-10-12 10:02:08,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:08,898 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 296 transitions. [2020-10-12 10:02:08,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:02:08,899 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 296 transitions. [2020-10-12 10:02:08,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-10-12 10:02:08,900 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:08,901 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:08,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 10:02:08,901 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:08,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:08,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1570594274, now seen corresponding path program 32 times [2020-10-12 10:02:08,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:08,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532323771] [2020-10-12 10:02:08,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:08,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:08,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:09,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:09,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:09,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:09,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:13,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:13,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 291 [2020-10-12 10:02:13,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:13,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 10:02:13,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:13,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 10:02:13,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 147 [2020-10-12 10:02:13,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 10:02:13,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:14,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:14,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:14,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:14,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:14,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:14,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:14,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:14,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:14,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:14,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:14,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4224 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 3696 trivial. 0 not checked. [2020-10-12 10:02:14,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532323771] [2020-10-12 10:02:14,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:14,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 10:02:14,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168632386] [2020-10-12 10:02:14,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 10:02:14,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:14,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 10:02:14,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:02:14,644 INFO L87 Difference]: Start difference. First operand 288 states and 296 transitions. Second operand 36 states. [2020-10-12 10:02:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:15,423 INFO L93 Difference]: Finished difference Result 545 states and 568 transitions. [2020-10-12 10:02:15,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 10:02:15,424 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 283 [2020-10-12 10:02:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:15,426 INFO L225 Difference]: With dead ends: 545 [2020-10-12 10:02:15,426 INFO L226 Difference]: Without dead ends: 296 [2020-10-12 10:02:15,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:02:15,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-10-12 10:02:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2020-10-12 10:02:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-10-12 10:02:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 304 transitions. [2020-10-12 10:02:15,437 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 304 transitions. Word has length 283 [2020-10-12 10:02:15,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:15,437 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 304 transitions. [2020-10-12 10:02:15,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 10:02:15,437 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 304 transitions. [2020-10-12 10:02:15,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-12 10:02:15,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:15,439 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:15,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 10:02:15,440 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:15,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:15,440 INFO L82 PathProgramCache]: Analyzing trace with hash -903754086, now seen corresponding path program 33 times [2020-10-12 10:02:15,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:15,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779776008] [2020-10-12 10:02:15,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:15,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:15,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:15,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:16,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:16,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:20,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:20,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 299 [2020-10-12 10:02:20,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:20,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 10:02:20,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:20,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 10:02:20,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:02:20,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 10:02:20,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:21,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:21,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:21,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:21,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:21,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:21,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:21,244 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:21,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:21,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:21,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:21,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:21,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4488 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 3927 trivial. 0 not checked. [2020-10-12 10:02:21,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779776008] [2020-10-12 10:02:21,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:21,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 10:02:21,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117389308] [2020-10-12 10:02:21,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 10:02:21,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:21,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 10:02:21,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:02:21,281 INFO L87 Difference]: Start difference. First operand 296 states and 304 transitions. Second operand 37 states. [2020-10-12 10:02:22,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:22,067 INFO L93 Difference]: Finished difference Result 560 states and 583 transitions. [2020-10-12 10:02:22,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 10:02:22,067 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 291 [2020-10-12 10:02:22,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:22,069 INFO L225 Difference]: With dead ends: 560 [2020-10-12 10:02:22,069 INFO L226 Difference]: Without dead ends: 304 [2020-10-12 10:02:22,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:02:22,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-12 10:02:22,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2020-10-12 10:02:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-12 10:02:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 312 transitions. [2020-10-12 10:02:22,079 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 312 transitions. Word has length 291 [2020-10-12 10:02:22,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:22,080 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 312 transitions. [2020-10-12 10:02:22,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 10:02:22,080 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 312 transitions. [2020-10-12 10:02:22,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-12 10:02:22,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:22,082 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:22,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 10:02:22,082 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:22,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:22,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1784312990, now seen corresponding path program 34 times [2020-10-12 10:02:22,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:22,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088070824] [2020-10-12 10:02:22,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:22,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:22,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:22,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:22,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:22,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:27,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:27,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-12 10:02:27,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:27,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5039 [2020-10-12 10:02:27,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:27,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 10:02:27,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:02:27,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 10:02:27,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:27,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:27,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:27,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:27,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:27,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:27,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:27,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:27,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:27,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:27,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:27,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 4165 trivial. 0 not checked. [2020-10-12 10:02:27,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088070824] [2020-10-12 10:02:27,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:27,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 10:02:27,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283694093] [2020-10-12 10:02:27,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 10:02:27,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:27,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 10:02:27,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:02:27,913 INFO L87 Difference]: Start difference. First operand 304 states and 312 transitions. Second operand 38 states. [2020-10-12 10:02:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:28,730 INFO L93 Difference]: Finished difference Result 575 states and 598 transitions. [2020-10-12 10:02:28,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:02:28,731 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 299 [2020-10-12 10:02:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:28,733 INFO L225 Difference]: With dead ends: 575 [2020-10-12 10:02:28,733 INFO L226 Difference]: Without dead ends: 312 [2020-10-12 10:02:28,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:02:28,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-12 10:02:28,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2020-10-12 10:02:28,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-10-12 10:02:28,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 320 transitions. [2020-10-12 10:02:28,743 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 320 transitions. Word has length 299 [2020-10-12 10:02:28,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:28,743 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 320 transitions. [2020-10-12 10:02:28,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 10:02:28,743 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 320 transitions. [2020-10-12 10:02:28,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-12 10:02:28,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:28,745 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:28,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 10:02:28,746 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:28,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:28,746 INFO L82 PathProgramCache]: Analyzing trace with hash -808626918, now seen corresponding path program 35 times [2020-10-12 10:02:28,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:28,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691189967] [2020-10-12 10:02:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:28,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:28,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:29,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:29,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:29,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:33,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:33,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-12 10:02:33,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:33,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 10:02:33,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:33,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 10:02:33,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:02:33,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 10:02:33,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:34,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:34,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:34,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:34,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:34,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:34,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:34,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:34,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:34,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:34,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:34,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:34,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:34,616 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 4410 trivial. 0 not checked. [2020-10-12 10:02:34,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691189967] [2020-10-12 10:02:34,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:34,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 10:02:34,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539835177] [2020-10-12 10:02:34,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 10:02:34,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:34,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 10:02:34,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:02:34,619 INFO L87 Difference]: Start difference. First operand 312 states and 320 transitions. Second operand 39 states. [2020-10-12 10:02:35,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:35,369 INFO L93 Difference]: Finished difference Result 590 states and 613 transitions. [2020-10-12 10:02:35,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 10:02:35,369 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 307 [2020-10-12 10:02:35,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:35,371 INFO L225 Difference]: With dead ends: 590 [2020-10-12 10:02:35,371 INFO L226 Difference]: Without dead ends: 320 [2020-10-12 10:02:35,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:02:35,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-12 10:02:35,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2020-10-12 10:02:35,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2020-10-12 10:02:35,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 328 transitions. [2020-10-12 10:02:35,380 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 328 transitions. Word has length 307 [2020-10-12 10:02:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:35,381 INFO L479 AbstractCegarLoop]: Abstraction has 320 states and 328 transitions. [2020-10-12 10:02:35,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 10:02:35,381 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 328 transitions. [2020-10-12 10:02:35,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2020-10-12 10:02:35,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:35,383 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:35,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 10:02:35,383 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:35,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:35,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1196992286, now seen corresponding path program 36 times [2020-10-12 10:02:35,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:35,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750476868] [2020-10-12 10:02:35,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:35,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:35,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:35,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:36,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:36,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:40,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:40,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 323 [2020-10-12 10:02:40,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:40,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-12 10:02:40,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:40,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 10:02:40,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:02:40,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 10:02:40,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:41,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:41,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:41,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:41,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:41,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:41,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:41,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:41,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:41,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:41,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:41,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5328 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 4662 trivial. 0 not checked. [2020-10-12 10:02:41,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750476868] [2020-10-12 10:02:41,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:41,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 10:02:41,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125808103] [2020-10-12 10:02:41,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 10:02:41,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:41,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 10:02:41,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:02:41,301 INFO L87 Difference]: Start difference. First operand 320 states and 328 transitions. Second operand 40 states. [2020-10-12 10:02:42,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:42,180 INFO L93 Difference]: Finished difference Result 605 states and 628 transitions. [2020-10-12 10:02:42,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 10:02:42,181 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 315 [2020-10-12 10:02:42,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:42,183 INFO L225 Difference]: With dead ends: 605 [2020-10-12 10:02:42,183 INFO L226 Difference]: Without dead ends: 328 [2020-10-12 10:02:42,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:02:42,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-12 10:02:42,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2020-10-12 10:02:42,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-12 10:02:42,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 336 transitions. [2020-10-12 10:02:42,195 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 336 transitions. Word has length 315 [2020-10-12 10:02:42,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:42,195 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 336 transitions. [2020-10-12 10:02:42,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 10:02:42,195 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 336 transitions. [2020-10-12 10:02:42,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-12 10:02:42,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:42,198 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:42,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 10:02:42,198 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:42,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:42,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1127875686, now seen corresponding path program 37 times [2020-10-12 10:02:42,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:42,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237982323] [2020-10-12 10:02:42,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:42,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:42,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:42,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:42,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:42,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:43,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:47,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:47,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-12 10:02:47,293 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:47,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-12 10:02:47,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:47,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 10:02:47,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-12 10:02:47,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 10:02:47,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:48,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:48,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:48,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:48,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:48,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:48,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:48,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:48,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:48,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:48,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:48,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5624 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 4921 trivial. 0 not checked. [2020-10-12 10:02:48,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237982323] [2020-10-12 10:02:48,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:48,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 10:02:48,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830150180] [2020-10-12 10:02:48,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 10:02:48,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:48,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 10:02:48,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:02:48,192 INFO L87 Difference]: Start difference. First operand 328 states and 336 transitions. Second operand 41 states. [2020-10-12 10:02:49,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:49,136 INFO L93 Difference]: Finished difference Result 620 states and 643 transitions. [2020-10-12 10:02:49,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 10:02:49,137 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 323 [2020-10-12 10:02:49,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:49,139 INFO L225 Difference]: With dead ends: 620 [2020-10-12 10:02:49,139 INFO L226 Difference]: Without dead ends: 336 [2020-10-12 10:02:49,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:02:49,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-12 10:02:49,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2020-10-12 10:02:49,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-12 10:02:49,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 344 transitions. [2020-10-12 10:02:49,150 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 344 transitions. Word has length 323 [2020-10-12 10:02:49,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:49,150 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 344 transitions. [2020-10-12 10:02:49,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 10:02:49,150 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 344 transitions. [2020-10-12 10:02:49,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-12 10:02:49,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:49,153 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:49,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 10:02:49,153 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:49,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:49,153 INFO L82 PathProgramCache]: Analyzing trace with hash 876427678, now seen corresponding path program 38 times [2020-10-12 10:02:49,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:49,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544589727] [2020-10-12 10:02:49,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:49,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:49,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:49,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:49,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:50,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:54,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:54,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-12 10:02:54,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:02:54,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-12 10:02:54,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:54,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 10:02:54,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-12 10:02:54,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 10:02:54,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:55,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:02:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:55,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:55,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:02:55,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:02:55,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:02:55,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:02:55,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:02:55,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:02:55,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:02:55,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:02:55,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:02:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5928 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 5187 trivial. 0 not checked. [2020-10-12 10:02:55,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544589727] [2020-10-12 10:02:55,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:02:55,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 10:02:55,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004287649] [2020-10-12 10:02:55,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 10:02:55,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:02:55,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 10:02:55,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:02:55,201 INFO L87 Difference]: Start difference. First operand 336 states and 344 transitions. Second operand 42 states. [2020-10-12 10:02:56,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:02:56,108 INFO L93 Difference]: Finished difference Result 635 states and 658 transitions. [2020-10-12 10:02:56,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:02:56,109 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 331 [2020-10-12 10:02:56,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:02:56,112 INFO L225 Difference]: With dead ends: 635 [2020-10-12 10:02:56,112 INFO L226 Difference]: Without dead ends: 344 [2020-10-12 10:02:56,114 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:02:56,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-10-12 10:02:56,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2020-10-12 10:02:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-10-12 10:02:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 352 transitions. [2020-10-12 10:02:56,123 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 352 transitions. Word has length 331 [2020-10-12 10:02:56,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:02:56,124 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 352 transitions. [2020-10-12 10:02:56,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 10:02:56,124 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 352 transitions. [2020-10-12 10:02:56,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-12 10:02:56,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:02:56,126 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:02:56,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 10:02:56,126 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:02:56,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:02:56,127 INFO L82 PathProgramCache]: Analyzing trace with hash -257179110, now seen corresponding path program 39 times [2020-10-12 10:02:56,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:02:56,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311877200] [2020-10-12 10:02:56,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:02:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:02:56,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:56,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:56,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:56,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:02:57,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:01,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:03:01,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 347 [2020-10-12 10:03:01,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:03:01,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-12 10:03:01,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:03:01,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 10:03:01,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-12 10:03:01,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 10:03:01,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:03:02,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:03:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:03:02,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:02,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:03:02,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:03:02,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:03:02,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:03:02,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:03:02,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:03:02,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:03:02,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:03:02,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:03:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2020-10-12 10:03:02,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311877200] [2020-10-12 10:03:02,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:03:02,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 10:03:02,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071879983] [2020-10-12 10:03:02,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 10:03:02,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:03:02,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 10:03:02,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:03:02,243 INFO L87 Difference]: Start difference. First operand 344 states and 352 transitions. Second operand 43 states. [2020-10-12 10:03:03,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:03:03,065 INFO L93 Difference]: Finished difference Result 650 states and 673 transitions. [2020-10-12 10:03:03,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 10:03:03,066 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 339 [2020-10-12 10:03:03,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:03:03,068 INFO L225 Difference]: With dead ends: 650 [2020-10-12 10:03:03,068 INFO L226 Difference]: Without dead ends: 352 [2020-10-12 10:03:03,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:03:03,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-10-12 10:03:03,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2020-10-12 10:03:03,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-12 10:03:03,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 360 transitions. [2020-10-12 10:03:03,079 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 360 transitions. Word has length 339 [2020-10-12 10:03:03,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:03:03,079 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 360 transitions. [2020-10-12 10:03:03,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 10:03:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 360 transitions. [2020-10-12 10:03:03,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-10-12 10:03:03,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:03:03,082 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:03:03,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 10:03:03,082 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:03:03,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:03:03,083 INFO L82 PathProgramCache]: Analyzing trace with hash 770190366, now seen corresponding path program 40 times [2020-10-12 10:03:03,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:03:03,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779805387] [2020-10-12 10:03:03,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:03:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:03:03,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:03,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:03,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:03,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:04,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:08,141 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:03:08,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 355 [2020-10-12 10:03:08,142 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 10:03:08,142 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-12 10:03:08,142 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:03:08,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 10:03:08,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:03:08,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 10:03:08,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:03:09,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:03:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:03:09,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:03:09,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:03:09,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:03:09,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:03:09,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:03:09,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:03:09,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:03:09,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:03:09,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:03:09,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:03:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6560 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 5740 trivial. 0 not checked. [2020-10-12 10:03:09,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779805387] [2020-10-12 10:03:09,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:03:09,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 10:03:09,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789710293] [2020-10-12 10:03:09,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 10:03:09,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:03:09,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 10:03:09,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:03:09,197 INFO L87 Difference]: Start difference. First operand 352 states and 360 transitions. Second operand 44 states.