/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/reducercommutativity/sep05-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 17:29:34,568 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 17:29:34,571 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 17:29:34,625 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 17:29:34,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 17:29:34,634 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 17:29:34,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 17:29:34,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 17:29:34,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 17:29:34,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 17:29:34,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 17:29:34,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 17:29:34,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 17:29:34,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 17:29:34,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 17:29:34,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 17:29:34,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 17:29:34,671 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 17:29:34,679 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 17:29:34,683 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 17:29:34,686 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 17:29:34,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 17:29:34,689 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 17:29:34,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 17:29:34,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 17:29:34,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 17:29:34,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 17:29:34,704 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 17:29:34,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 17:29:34,719 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-28 17:29:34,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 17:29:34,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 17:29:34,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 17:29:34,728 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 [2020-10-28 17:29:34,782 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 17:29:34,783 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 17:29:34,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 17:29:34,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 17:29:34,787 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 17:29:34,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 17:29:34,787 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 17:29:34,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 17:29:34,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 17:29:34,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 17:29:34,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 17:29:34,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 17:29:34,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 17:29:34,788 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 17:29:34,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 17:29:34,789 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 17:29:34,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 17:29:34,792 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 17:29:34,792 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 17:29:34,793 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 17:29:34,793 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 17:29:34,793 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 17:29:34,793 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 17:29:34,793 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 17:29:34,794 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 17:29:34,794 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 17:29:34,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 17:29:34,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 17:29:34,794 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 17:29:34,795 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 17:29:35,176 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 17:29:35,217 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 17:29:35,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 17:29:35,222 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 17:29:35,222 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 17:29:35,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep05-1.i [2020-10-28 17:29:35,308 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b56e95369/b71e2e943c0049359ebef22578cc30d5/FLAG236bee186 [2020-10-28 17:29:36,026 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 17:29:36,027 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/reducercommutativity/sep05-1.i [2020-10-28 17:29:36,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b56e95369/b71e2e943c0049359ebef22578cc30d5/FLAG236bee186 [2020-10-28 17:29:36,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b56e95369/b71e2e943c0049359ebef22578cc30d5 [2020-10-28 17:29:36,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 17:29:36,412 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 17:29:36,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 17:29:36,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 17:29:36,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 17:29:36,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:29:36" (1/1) ... [2020-10-28 17:29:36,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54c6cf48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:29:36, skipping insertion in model container [2020-10-28 17:29:36,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:29:36" (1/1) ... [2020-10-28 17:29:36,438 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 17:29:36,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 17:29:36,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:29:36,699 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 17:29:36,726 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:29:36,747 INFO L208 MainTranslator]: Completed translation [2020-10-28 17:29:36,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:29:36 WrapperNode [2020-10-28 17:29:36,748 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 17:29:36,750 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 17:29:36,750 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 17:29:36,750 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 17:29:36,763 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:29:36" (1/1) ... [2020-10-28 17:29:36,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:29:36" (1/1) ... [2020-10-28 17:29:36,773 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:29:36" (1/1) ... [2020-10-28 17:29:36,773 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:29:36" (1/1) ... [2020-10-28 17:29:36,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:29:36" (1/1) ... [2020-10-28 17:29:36,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:29:36" (1/1) ... [2020-10-28 17:29:36,790 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:29:36" (1/1) ... [2020-10-28 17:29:36,793 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 17:29:36,794 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 17:29:36,794 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 17:29:36,795 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 17:29:36,795 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:29:36" (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 [2020-10-28 17:29:36,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 17:29:36,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 17:29:36,885 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 17:29:36,885 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2020-10-28 17:29:36,885 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 17:29:36,885 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 17:29:36,885 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 17:29:36,885 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 17:29:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 17:29:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 17:29:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 17:29:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 17:29:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2020-10-28 17:29:36,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 17:29:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 17:29:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 17:29:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 17:29:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 17:29:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 17:29:36,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 17:29:37,379 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 17:29:37,379 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 17:29:37,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:29:37 BoogieIcfgContainer [2020-10-28 17:29:37,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 17:29:37,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 17:29:37,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 17:29:37,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 17:29:37,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 05:29:36" (1/3) ... [2020-10-28 17:29:37,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac9e53e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:29:37, skipping insertion in model container [2020-10-28 17:29:37,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:29:36" (2/3) ... [2020-10-28 17:29:37,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac9e53e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:29:37, skipping insertion in model container [2020-10-28 17:29:37,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:29:37" (3/3) ... [2020-10-28 17:29:37,407 INFO L111 eAbstractionObserver]: Analyzing ICFG sep05-1.i [2020-10-28 17:29:37,427 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 17:29:37,433 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 17:29:37,449 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 17:29:37,489 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 17:29:37,490 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 17:29:37,490 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 17:29:37,490 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 17:29:37,490 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 17:29:37,490 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 17:29:37,491 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 17:29:37,491 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 17:29:37,515 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-28 17:29:37,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 17:29:37,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:29:37,524 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 17:29:37,525 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:29:37,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:29:37,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1788891338, now seen corresponding path program 1 times [2020-10-28 17:29:37,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:29:37,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511226055] [2020-10-28 17:29:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:29:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:37,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:37,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:37,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:37,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:38,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:38,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:39,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:39,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 17:29:39,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 17:29:39,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1612 [2020-10-28 17:29:39,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:39,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:39,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 17:29:39,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:39,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 17:29:39,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:29:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:39,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:39,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:39,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:29:39,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:29:39,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:29:39,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:39,477 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:39,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:39,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:29:39,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:39,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:29:39,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 17:29:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:39,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:39,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:39,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:29:39,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:29:39,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:29:39,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:39,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:39,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:39,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 17:29:39,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:39,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:29:39,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-28 17:29:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:39,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:39,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:39,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:39,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:29:39,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:29:39,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:29:39,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:39,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:39,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:39,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-28 17:29:39,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:39,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:29:39,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 17:29:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:39,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:39,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:39,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:39,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:29:39,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:29:39,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 17:29:39,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:39,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:39,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:39,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 17:29:39,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:39,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:29:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 17:29:39,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511226055] [2020-10-28 17:29:39,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:29:39,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2020-10-28 17:29:39,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058986561] [2020-10-28 17:29:39,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 17:29:39,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:29:39,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 17:29:39,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 17:29:39,588 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-28 17:29:39,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:29:39,687 INFO L93 Difference]: Finished difference Result 62 states and 84 transitions. [2020-10-28 17:29:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 17:29:39,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-10-28 17:29:39,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:29:39,697 INFO L225 Difference]: With dead ends: 62 [2020-10-28 17:29:39,698 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 17:29:39,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 17:29:39,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 17:29:39,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 17:29:39,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 17:29:39,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-28 17:29:39,745 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2020-10-28 17:29:39,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:29:39,746 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-28 17:29:39,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 17:29:39,746 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-28 17:29:39,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 17:29:39,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:29:39,749 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 17:29:39,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 17:29:39,750 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:29:39,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:29:39,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1899018129, now seen corresponding path program 1 times [2020-10-28 17:29:39,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:29:39,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145933901] [2020-10-28 17:29:39,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:29:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:39,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:39,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:39,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:39,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:39,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:40,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:41,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:41,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 17:29:41,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 17:29:41,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1501 [2020-10-28 17:29:41,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:41,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:41,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:29:41,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:29:41,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 17:29:41,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:29:41,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:29:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:41,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:41,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:41,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:29:41,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:29:41,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:29:41,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:41,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:41,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:41,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:29:41,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:41,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:29:41,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 17:29:41,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:41,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:41,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:41,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:41,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:29:41,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:29:41,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 17:29:41,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:41,333 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:41,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:41,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-28 17:29:41,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:41,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:29:41,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-28 17:29:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:41,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:41,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:41,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:41,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:29:41,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:29:41,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 17:29:41,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:41,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:41,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:41,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-28 17:29:41,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:41,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:29:41,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-10-28 17:29:41,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:41,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:41,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:41,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:41,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:29:41,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:29:41,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 17:29:41,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:41,365 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:41,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-28 17:29:41,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:41,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:29:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 17:29:41,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145933901] [2020-10-28 17:29:41,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:29:41,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 17:29:41,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932987366] [2020-10-28 17:29:41,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 17:29:41,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:29:41,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 17:29:41,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:29:41,375 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 4 states. [2020-10-28 17:29:41,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:29:41,467 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-10-28 17:29:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 17:29:41,467 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-28 17:29:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:29:41,468 INFO L225 Difference]: With dead ends: 52 [2020-10-28 17:29:41,469 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 17:29:41,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:29:41,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 17:29:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-28 17:29:41,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 17:29:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-28 17:29:41,479 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 34 [2020-10-28 17:29:41,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:29:41,480 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-28 17:29:41,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 17:29:41,480 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-28 17:29:41,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 17:29:41,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:29:41,481 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 17:29:41,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 17:29:41,482 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:29:41,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:29:41,483 INFO L82 PathProgramCache]: Analyzing trace with hash 261170739, now seen corresponding path program 1 times [2020-10-28 17:29:41,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:29:41,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132730704] [2020-10-28 17:29:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:29:41,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:41,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:41,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:41,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:41,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:41,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:41,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:43,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:43,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 17:29:43,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 17:29:43,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2397 [2020-10-28 17:29:43,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:43,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:43,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:29:43,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:29:43,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 17:29:43,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:29:43,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:29:43,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:43,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:43,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:43,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:29:43,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:29:43,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:29:43,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:43,967 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:43,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:43,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:29:43,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:43,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:29:43,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 17:29:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:43,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:43,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:43,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:43,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:29:43,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:29:43,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 17:29:43,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:43,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:43,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:43,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-28 17:29:43,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:43,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:29:43,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-28 17:29:43,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:43,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:44,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:44,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:44,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:29:44,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:29:44,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 17:29:44,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:44,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:44,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:44,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-28 17:29:44,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:44,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:29:44,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 17:29:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:44,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:44,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:44,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:44,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:29:44,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:29:44,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 17:29:44,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:44,030 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:44,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:44,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-28 17:29:44,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:44,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:29:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 17:29:44,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132730704] [2020-10-28 17:29:44,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:29:44,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 17:29:44,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403634577] [2020-10-28 17:29:44,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 17:29:44,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:29:44,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 17:29:44,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:29:44,041 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-10-28 17:29:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:29:44,162 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2020-10-28 17:29:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 17:29:44,163 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-10-28 17:29:44,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:29:44,164 INFO L225 Difference]: With dead ends: 54 [2020-10-28 17:29:44,164 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 17:29:44,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:29:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 17:29:44,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-28 17:29:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 17:29:44,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-28 17:29:44,173 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 36 [2020-10-28 17:29:44,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:29:44,174 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-28 17:29:44,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 17:29:44,174 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-28 17:29:44,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 17:29:44,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:29:44,176 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:29:44,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 17:29:44,176 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:29:44,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:29:44,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1752140715, now seen corresponding path program 2 times [2020-10-28 17:29:44,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:29:44,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53811911] [2020-10-28 17:29:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:29:44,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:44,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:44,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:44,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:44,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:44,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:44,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:47,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:47,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 17:29:47,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 17:29:47,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3352 [2020-10-28 17:29:47,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:47,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:47,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:29:47,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 17:29:47,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 17:29:47,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:29:47,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:29:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:47,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:47,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:47,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:29:47,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:29:47,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:29:47,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:47,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:47,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:47,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:29:47,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:47,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 17:29:47,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 17:29:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:47,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:47,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:47,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:47,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:29:47,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:29:47,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 17:29:47,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:47,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:47,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:47,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:29:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:47,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:29:47,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-28 17:29:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:47,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:47,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:47,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:47,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:29:47,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:29:47,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 17:29:47,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:47,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:47,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:47,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:29:47,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:47,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:29:47,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 17:29:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:47,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:47,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:47,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 17:29:47,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:29:47,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 17:29:47,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:47,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:47,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:29:47,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:29:47,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 17:29:47,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:29:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 17:29:47,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53811911] [2020-10-28 17:29:47,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:29:47,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 17:29:47,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386372248] [2020-10-28 17:29:47,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 17:29:47,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:29:47,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 17:29:47,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:29:47,682 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 4 states. [2020-10-28 17:29:47,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:29:47,810 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2020-10-28 17:29:47,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 17:29:47,810 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-28 17:29:47,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:29:47,811 INFO L225 Difference]: With dead ends: 55 [2020-10-28 17:29:47,811 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 17:29:47,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:29:47,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 17:29:47,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-10-28 17:29:47,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 17:29:47,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-28 17:29:47,820 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 38 [2020-10-28 17:29:47,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:29:47,820 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-28 17:29:47,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 17:29:47,821 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-28 17:29:47,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 17:29:47,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:29:47,822 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:29:47,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 17:29:47,822 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:29:47,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:29:47,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1741039266, now seen corresponding path program 1 times [2020-10-28 17:29:47,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:29:47,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525395421] [2020-10-28 17:29:47,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:29:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:47,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:47,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:47,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:47,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:48,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:52,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:52,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:52,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 17:29:52,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 17:29:52,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5125 [2020-10-28 17:29:52,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:52,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:52,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:29:52,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-28 17:29:52,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:29:52,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:29:53,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:29:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:53,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:53,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:53,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:29:53,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:29:53,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:29:53,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:53,046 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:53,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:53,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:29:53,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:53,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:29:53,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 17:29:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:53,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:53,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:53,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:53,079 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 17:29:53,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:29:53,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 17:29:53,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:53,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:53,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:53,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:29:53,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:53,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:29:53,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-28 17:29:53,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:53,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:53,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:53,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 17:29:53,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:29:53,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 17:29:53,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:53,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:53,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:29:53,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:29:53,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 17:29:53,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:29:53,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-28 17:29:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:53,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:53,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:53,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:53,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 17:29:53,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:29:53,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 17:29:53,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:53,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-28 17:29:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:53,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:29:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-28 17:29:53,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525395421] [2020-10-28 17:29:53,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:29:53,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 17:29:53,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656849827] [2020-10-28 17:29:53,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 17:29:53,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:29:53,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 17:29:53,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:29:53,193 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 5 states. [2020-10-28 17:29:53,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:29:53,380 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2020-10-28 17:29:53,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 17:29:53,380 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-28 17:29:53,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:29:53,381 INFO L225 Difference]: With dead ends: 59 [2020-10-28 17:29:53,382 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 17:29:53,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:29:53,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 17:29:53,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-10-28 17:29:53,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 17:29:53,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 17:29:53,397 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 47 [2020-10-28 17:29:53,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:29:53,397 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 17:29:53,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 17:29:53,398 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 17:29:53,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 17:29:53,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:29:53,401 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:29:53,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 17:29:53,402 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:29:53,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:29:53,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1287598475, now seen corresponding path program 2 times [2020-10-28 17:29:53,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:29:53,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128723471] [2020-10-28 17:29:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:29:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:53,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:53,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:53,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:53,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:55,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:58,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:58,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 17:29:58,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:29:58,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 17:29:58,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:58,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:58,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:29:58,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-28 17:29:58,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 17:29:58,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:29:58,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:29:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:58,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:58,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:58,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:29:58,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:29:58,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:29:58,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:58,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:58,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:58,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:29:58,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:58,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:29:58,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 17:29:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:58,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:58,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:58,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:58,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 17:29:58,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:29:58,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 17:29:58,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:58,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:58,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:58,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:29:58,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:58,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:29:58,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-28 17:29:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:58,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:58,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:58,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:58,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 17:29:58,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:29:58,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 17:29:58,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:58,623 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:58,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:58,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:29:58,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:58,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:29:58,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 17:29:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:58,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:58,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:58,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:29:58,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 17:29:58,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:29:58,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-28 17:29:58,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:29:58,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:29:58,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:29:58,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 17:29:58,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:29:58,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:29:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-28 17:29:58,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128723471] [2020-10-28 17:29:58,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:29:58,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 17:29:58,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292660355] [2020-10-28 17:29:58,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 17:29:58,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:29:58,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 17:29:58,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:29:58,705 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 4 states. [2020-10-28 17:29:58,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:29:58,808 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2020-10-28 17:29:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 17:29:58,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 56 [2020-10-28 17:29:58,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:29:58,812 INFO L225 Difference]: With dead ends: 57 [2020-10-28 17:29:58,813 INFO L226 Difference]: Without dead ends: 38 [2020-10-28 17:29:58,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 17:29:58,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-28 17:29:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-28 17:29:58,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 17:29:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-28 17:29:58,829 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 56 [2020-10-28 17:29:58,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:29:58,833 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-28 17:29:58,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 17:29:58,833 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-28 17:29:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 17:29:58,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:29:58,837 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:29:58,837 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 17:29:58,837 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:29:58,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:29:58,839 INFO L82 PathProgramCache]: Analyzing trace with hash 625564083, now seen corresponding path program 1 times [2020-10-28 17:29:58,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:29:58,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10763725] [2020-10-28 17:29:58,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:29:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:29:58,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:58,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:58,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:29:58,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:00,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:03,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:03,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 17:30:03,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:30:03,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 17:30:03,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:03,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:03,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:30:03,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 17:30:03,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 17:30:03,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:03,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:30:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:03,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:03,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:03,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:30:03,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:03,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:30:03,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:03,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:03,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:03,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:03,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:03,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:03,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 17:30:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:03,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:03,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:03,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:03,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 17:30:03,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:30:03,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 17:30:03,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:03,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:03,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:03,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:03,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:03,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:03,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-10-28 17:30:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:03,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:04,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:04,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 17:30:04,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:04,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 17:30:04,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:04,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:04,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:30:04,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:30:04,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 17:30:04,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:04,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-28 17:30:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:04,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:04,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:04,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:04,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 17:30:04,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:30:04,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-28 17:30:04,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:04,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:04,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:04,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 17:30:04,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:04,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-28 17:30:04,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10763725] [2020-10-28 17:30:04,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:30:04,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 17:30:04,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593963429] [2020-10-28 17:30:04,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:30:04,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:30:04,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:30:04,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:30:04,117 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 6 states. [2020-10-28 17:30:04,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:30:04,326 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2020-10-28 17:30:04,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:30:04,327 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-28 17:30:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:30:04,328 INFO L225 Difference]: With dead ends: 67 [2020-10-28 17:30:04,328 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 17:30:04,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 17:30:04,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 17:30:04,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-28 17:30:04,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 17:30:04,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2020-10-28 17:30:04,340 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 58 [2020-10-28 17:30:04,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:30:04,340 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2020-10-28 17:30:04,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:30:04,340 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2020-10-28 17:30:04,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 17:30:04,348 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:30:04,348 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:30:04,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 17:30:04,348 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:30:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:30:04,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1192189504, now seen corresponding path program 2 times [2020-10-28 17:30:04,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:30:04,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345717610] [2020-10-28 17:30:04,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:30:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:04,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:04,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:04,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:04,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:07,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:09,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:09,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 17:30:09,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:30:09,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 17:30:09,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:09,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:09,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:30:09,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:30:09,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 17:30:09,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:30:09,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:30:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:09,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:09,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:09,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:30:09,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:09,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:30:09,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:09,437 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:09,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:09,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:09,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:09,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:30:09,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-28 17:30:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:09,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:09,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:09,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:09,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 17:30:09,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:30:09,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-28 17:30:09,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:09,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:09,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:09,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 17:30:09,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:09,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:09,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-28 17:30:09,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:09,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:09,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:09,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:09,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 17:30:09,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:30:09,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-10-28 17:30:09,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:09,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:09,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:09,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 17:30:09,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:09,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:09,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-10-28 17:30:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:09,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:09,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:09,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:09,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 17:30:09,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:30:09,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 67 [2020-10-28 17:30:09,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:09,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:09,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:09,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 17:30:09,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:09,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2020-10-28 17:30:09,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345717610] [2020-10-28 17:30:09,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:30:09,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 17:30:09,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127546419] [2020-10-28 17:30:09,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:30:09,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:30:09,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:30:09,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:30:09,714 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 6 states. [2020-10-28 17:30:09,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:30:09,827 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-10-28 17:30:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:30:09,828 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-28 17:30:09,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:30:09,828 INFO L225 Difference]: With dead ends: 72 [2020-10-28 17:30:09,829 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 17:30:09,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:30:09,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 17:30:09,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-28 17:30:09,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 17:30:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2020-10-28 17:30:09,844 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 67 [2020-10-28 17:30:09,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:30:09,845 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2020-10-28 17:30:09,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:30:09,847 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2020-10-28 17:30:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 17:30:09,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:30:09,848 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 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] [2020-10-28 17:30:09,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 17:30:09,849 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:30:09,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:30:09,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1158672546, now seen corresponding path program 3 times [2020-10-28 17:30:09,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:30:09,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789533223] [2020-10-28 17:30:09,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:30:09,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:09,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:09,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:09,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:09,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:14,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:14,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:14,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 17:30:14,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:30:14,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 17:30:14,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:14,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 17:30:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-28 17:30:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 17:30:14,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:14,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:30:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:14,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:14,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:14,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:30:14,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:14,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:30:14,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:14,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:14,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:14,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:14,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:14,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:14,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-28 17:30:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:14,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:14,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:15,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:15,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 17:30:15,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:30:15,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 69 [2020-10-28 17:30:15,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:15,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:15,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:15,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:15,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:15,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:15,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 17:30:15,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:15,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:15,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:15,087 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:15,087 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 17:30:15,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:30:15,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-28 17:30:15,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:15,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:15,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:15,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:15,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:15,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:15,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-28 17:30:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:15,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:15,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:15,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:15,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 17:30:15,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:30:15,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-28 17:30:15,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:15,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:15,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:15,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 17:30:15,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:15,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:15,175 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-10-28 17:30:15,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789533223] [2020-10-28 17:30:15,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:30:15,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 17:30:15,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058084182] [2020-10-28 17:30:15,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 17:30:15,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:30:15,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 17:30:15,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:30:15,181 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand 5 states. [2020-10-28 17:30:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:30:15,287 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2020-10-28 17:30:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 17:30:15,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-28 17:30:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:30:15,289 INFO L225 Difference]: With dead ends: 67 [2020-10-28 17:30:15,289 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 17:30:15,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 17:30:15,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 17:30:15,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-28 17:30:15,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 17:30:15,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-28 17:30:15,298 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 69 [2020-10-28 17:30:15,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:30:15,298 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-28 17:30:15,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 17:30:15,298 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-28 17:30:15,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 17:30:15,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:30:15,299 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:30:15,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 17:30:15,300 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:30:15,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:30:15,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1763720416, now seen corresponding path program 4 times [2020-10-28 17:30:15,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:30:15,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142830955] [2020-10-28 17:30:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:30:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:15,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:15,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:15,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:15,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:18,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:20,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:20,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 17:30:20,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:30:20,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 17:30:20,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:20,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:20,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:30:20,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 17:30:20,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 17:30:20,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:20,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:30:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:20,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:20,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:20,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:30:20,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:20,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 17:30:20,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:20,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:20,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:20,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:20,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:20,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:20,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-28 17:30:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:20,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:20,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:20,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:20,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 17:30:20,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:30:20,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-28 17:30:20,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:20,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:20,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:20,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:20,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:20,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:20,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 17:30:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:20,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:20,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:20,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 17:30:20,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:20,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 17:30:20,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:20,504 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:20,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:30:20,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:30:20,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 17:30:20,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:20,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-10-28 17:30:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:20,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:20,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:20,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:20,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 17:30:20,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:30:20,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 17:30:20,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:20,605 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:20,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:20,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 17:30:20,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:20,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 37 proven. 49 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-28 17:30:20,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142830955] [2020-10-28 17:30:20,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:30:20,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 17:30:20,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702115686] [2020-10-28 17:30:20,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 17:30:20,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:30:20,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 17:30:20,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:30:20,618 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 7 states. [2020-10-28 17:30:20,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:30:20,838 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2020-10-28 17:30:20,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 17:30:20,839 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 71 [2020-10-28 17:30:20,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:30:20,840 INFO L225 Difference]: With dead ends: 79 [2020-10-28 17:30:20,840 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 17:30:20,841 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 17:30:20,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 17:30:20,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-28 17:30:20,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 17:30:20,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-28 17:30:20,851 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 71 [2020-10-28 17:30:20,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:30:20,851 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-28 17:30:20,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 17:30:20,852 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-28 17:30:20,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 17:30:20,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:30:20,855 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:30:20,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 17:30:20,856 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:30:20,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:30:20,856 INFO L82 PathProgramCache]: Analyzing trace with hash -522389965, now seen corresponding path program 5 times [2020-10-28 17:30:20,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:30:20,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575705000] [2020-10-28 17:30:20,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:30:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:20,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:20,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:20,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:20,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:25,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:25,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:25,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 17:30:25,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:30:25,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 17:30:25,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:25,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:25,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 17:30:25,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 17:30:25,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 17:30:25,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:25,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:30:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:25,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:25,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:25,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:30:25,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:25,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 17:30:25,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:25,924 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:25,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:25,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:25,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:25,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:25,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-28 17:30:25,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:25,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:25,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:26,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:26,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 17:30:26,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:30:26,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 79 [2020-10-28 17:30:26,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:26,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:26,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:26,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:26,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:26,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:26,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-28 17:30:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:26,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:26,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:26,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 17:30:26,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:26,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-28 17:30:26,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:26,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:26,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 17:30:26,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:30:26,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 17:30:26,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:26,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-10-28 17:30:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:26,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:26,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:26,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:26,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 17:30:26,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:30:26,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-28 17:30:26,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:26,229 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:26,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:26,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 17:30:26,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:26,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:26,242 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 60 proven. 82 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-28 17:30:26,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575705000] [2020-10-28 17:30:26,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:30:26,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 17:30:26,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134665884] [2020-10-28 17:30:26,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 17:30:26,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:30:26,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 17:30:26,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 17:30:26,245 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 8 states. [2020-10-28 17:30:26,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:30:26,560 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2020-10-28 17:30:26,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 17:30:26,560 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2020-10-28 17:30:26,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:30:26,561 INFO L225 Difference]: With dead ends: 83 [2020-10-28 17:30:26,561 INFO L226 Difference]: Without dead ends: 50 [2020-10-28 17:30:26,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-28 17:30:26,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-28 17:30:26,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-28 17:30:26,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-28 17:30:26,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2020-10-28 17:30:26,573 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 80 [2020-10-28 17:30:26,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:30:26,574 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2020-10-28 17:30:26,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 17:30:26,574 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2020-10-28 17:30:26,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 17:30:26,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:30:26,575 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:30:26,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 17:30:26,575 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:30:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:30:26,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2398528, now seen corresponding path program 6 times [2020-10-28 17:30:26,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:30:26,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147202304] [2020-10-28 17:30:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:30:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:26,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:26,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:27,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:31,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:31,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-28 17:30:31,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:30:31,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-28 17:30:31,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:31,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:31,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:30:31,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:30:31,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 17:30:31,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:31,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:30:31,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:31,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:31,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:31,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:30:31,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:31,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 17:30:31,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:31,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:31,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:31,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:31,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:31,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:31,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-10-28 17:30:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:31,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:31,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:31,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:31,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:31,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 17:30:31,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:31,737 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:31,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:31,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 17:30:31,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:31,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:31,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-28 17:30:31,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:31,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:31,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:31,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:31,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:31,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 17:30:31,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:31,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:31,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:31,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 17:30:31,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:31,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:31,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-28 17:30:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:31,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:31,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:31,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:31,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:31,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 17:30:31,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:31,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:31,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:31,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 17:30:31,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:31,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:31,828 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2020-10-28 17:30:31,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147202304] [2020-10-28 17:30:31,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:30:31,829 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 17:30:31,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620730265] [2020-10-28 17:30:31,829 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 17:30:31,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:30:31,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 17:30:31,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:30:31,830 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 7 states. [2020-10-28 17:30:31,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:30:31,966 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2020-10-28 17:30:31,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 17:30:31,967 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 89 [2020-10-28 17:30:31,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:30:31,968 INFO L225 Difference]: With dead ends: 90 [2020-10-28 17:30:31,969 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 17:30:31,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:30:31,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 17:30:31,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-28 17:30:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 17:30:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2020-10-28 17:30:31,976 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 89 [2020-10-28 17:30:31,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:30:31,977 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2020-10-28 17:30:31,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 17:30:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2020-10-28 17:30:31,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 17:30:31,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:30:31,978 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:30:31,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 17:30:31,978 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:30:31,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:30:31,979 INFO L82 PathProgramCache]: Analyzing trace with hash -775889826, now seen corresponding path program 7 times [2020-10-28 17:30:31,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:30:31,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384831065] [2020-10-28 17:30:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:30:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:32,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:32,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:33,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:37,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:37,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-28 17:30:37,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:30:37,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 17:30:37,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:37,004 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:37,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 17:30:37,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:30:37,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 17:30:37,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:37,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:30:37,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:37,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:37,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:37,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:30:37,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:37,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 17:30:37,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:37,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:37,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:37,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:37,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:37,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:37,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 17:30:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:37,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:37,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:37,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:37,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:37,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 17:30:37,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:37,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:37,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:37,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 17:30:37,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:37,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:37,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-10-28 17:30:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:37,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:37,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:37,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:37,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:37,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 17:30:37,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:37,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:37,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:37,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 17:30:37,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:37,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:37,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-10-28 17:30:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:37,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:37,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:37,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:37,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:37,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 17:30:37,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:37,182 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:37,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:37,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 17:30:37,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:37,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:30:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2020-10-28 17:30:37,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384831065] [2020-10-28 17:30:37,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:30:37,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 17:30:37,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230880527] [2020-10-28 17:30:37,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 17:30:37,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:30:37,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 17:30:37,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 17:30:37,206 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand 8 states. [2020-10-28 17:30:37,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:30:37,376 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2020-10-28 17:30:37,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 17:30:37,377 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 91 [2020-10-28 17:30:37,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:30:37,379 INFO L225 Difference]: With dead ends: 91 [2020-10-28 17:30:37,379 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 17:30:37,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 17:30:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 17:30:37,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-28 17:30:37,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 17:30:37,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-10-28 17:30:37,400 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 91 [2020-10-28 17:30:37,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:30:37,402 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-10-28 17:30:37,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 17:30:37,403 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-10-28 17:30:37,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 17:30:37,404 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:30:37,405 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:30:37,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 17:30:37,405 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:30:37,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:30:37,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1386688516, now seen corresponding path program 8 times [2020-10-28 17:30:37,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:30:37,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756130805] [2020-10-28 17:30:37,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:30:37,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:37,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:37,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:42,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:42,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 17:30:42,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:30:42,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4912 [2020-10-28 17:30:42,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:42,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:42,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:30:42,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-28 17:30:42,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 17:30:42,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:42,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:30:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:42,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:42,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:42,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:30:42,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:42,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:30:42,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:42,416 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:42,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:42,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:42,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:42,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:42,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 17:30:42,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:42,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:42,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:42,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:42,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:42,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 17:30:42,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:42,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:42,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:42,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:42,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:42,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:42,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 17:30:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:42,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:42,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:42,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:42,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:42,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 17:30:42,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:42,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:42,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:42,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:42,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:42,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:42,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-28 17:30:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:42,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:42,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:42,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:42,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:42,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 17:30:42,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:42,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:42,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:42,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 17:30:42,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:42,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-28 17:30:42,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756130805] [2020-10-28 17:30:42,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:30:42,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 17:30:42,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145569249] [2020-10-28 17:30:42,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:30:42,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:30:42,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:30:42,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:30:42,538 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 6 states. [2020-10-28 17:30:42,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:30:42,662 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2020-10-28 17:30:42,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:30:42,662 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-10-28 17:30:42,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:30:42,663 INFO L225 Difference]: With dead ends: 85 [2020-10-28 17:30:42,664 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 17:30:42,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:30:42,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 17:30:42,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-28 17:30:42,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 17:30:42,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2020-10-28 17:30:42,673 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 93 [2020-10-28 17:30:42,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:30:42,676 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2020-10-28 17:30:42,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:30:42,676 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2020-10-28 17:30:42,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 17:30:42,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:30:42,677 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 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] [2020-10-28 17:30:42,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 17:30:42,678 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:30:42,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:30:42,681 INFO L82 PathProgramCache]: Analyzing trace with hash -969352066, now seen corresponding path program 9 times [2020-10-28 17:30:42,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:30:42,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58727816] [2020-10-28 17:30:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:30:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:42,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:43,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:47,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:47,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 17:30:47,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:30:47,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 17:30:47,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:47,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:47,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:30:47,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 70 [2020-10-28 17:30:47,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 17:30:47,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:47,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:30:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:47,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:47,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:47,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:30:47,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:47,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:30:47,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:47,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:47,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:47,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:47,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:47,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:47,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 17:30:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:47,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:47,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:47,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:47,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:47,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 17:30:47,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:47,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:47,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:47,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:47,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:47,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:47,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 17:30:47,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:47,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:47,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:47,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:47,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:47,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 17:30:47,841 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:47,842 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:47,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:47,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:47,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:47,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:47,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-28 17:30:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:47,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:47,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:47,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:47,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:47,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 17:30:47,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:47,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:47,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:47,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 17:30:47,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:47,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:47,888 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-10-28 17:30:47,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58727816] [2020-10-28 17:30:47,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:30:47,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 17:30:47,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314661660] [2020-10-28 17:30:47,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 17:30:47,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:30:47,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 17:30:47,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:30:47,891 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand 7 states. [2020-10-28 17:30:48,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:30:48,013 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2020-10-28 17:30:48,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 17:30:48,013 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 95 [2020-10-28 17:30:48,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:30:48,014 INFO L225 Difference]: With dead ends: 86 [2020-10-28 17:30:48,014 INFO L226 Difference]: Without dead ends: 58 [2020-10-28 17:30:48,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 17:30:48,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-28 17:30:48,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-28 17:30:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 17:30:48,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2020-10-28 17:30:48,030 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 95 [2020-10-28 17:30:48,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:30:48,031 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2020-10-28 17:30:48,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 17:30:48,031 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2020-10-28 17:30:48,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 17:30:48,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:30:48,032 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 5, 5, 4, 4, 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] [2020-10-28 17:30:48,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 17:30:48,033 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:30:48,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:30:48,039 INFO L82 PathProgramCache]: Analyzing trace with hash 659017856, now seen corresponding path program 10 times [2020-10-28 17:30:48,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:30:48,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060296554] [2020-10-28 17:30:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:30:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:48,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:50,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:50,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 17:30:50,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:50,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2651 [2020-10-28 17:30:50,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:50,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:50,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 17:30:50,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 17:30:50,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 17:30:50,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:51,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:30:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:51,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:51,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:51,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:30:51,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:51,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:30:51,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:51,008 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:51,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:51,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:51,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:51,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:51,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 17:30:51,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:51,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:51,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:51,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:51,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:51,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-28 17:30:51,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:51,156 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:51,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 17:30:51,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:51,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 17:30:51,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:51,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 17:30:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:51,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:51,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:51,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:51,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:51,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-28 17:30:51,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:51,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:51,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 17:30:51,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:51,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:30:51,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:51,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 17:30:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:51,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:51,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:51,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:51,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:51,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-28 17:30:51,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:51,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:51,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 17:30:51,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:51,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:30:51,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2020-10-28 17:30:51,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060296554] [2020-10-28 17:30:51,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:30:51,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 17:30:51,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266196127] [2020-10-28 17:30:51,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 17:30:51,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:30:51,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 17:30:51,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-28 17:30:51,900 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand 16 states. [2020-10-28 17:30:52,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:30:52,981 INFO L93 Difference]: Finished difference Result 153 states and 213 transitions. [2020-10-28 17:30:52,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 17:30:52,982 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-10-28 17:30:52,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:30:52,987 INFO L225 Difference]: With dead ends: 153 [2020-10-28 17:30:52,987 INFO L226 Difference]: Without dead ends: 147 [2020-10-28 17:30:52,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2020-10-28 17:30:52,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-28 17:30:53,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 114. [2020-10-28 17:30:53,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 17:30:53,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 146 transitions. [2020-10-28 17:30:53,030 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 146 transitions. Word has length 97 [2020-10-28 17:30:53,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:30:53,030 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 146 transitions. [2020-10-28 17:30:53,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 17:30:53,030 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 146 transitions. [2020-10-28 17:30:53,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 17:30:53,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:30:53,032 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 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] [2020-10-28 17:30:53,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 17:30:53,033 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:30:53,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:30:53,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1360082434, now seen corresponding path program 1 times [2020-10-28 17:30:53,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:30:53,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53688361] [2020-10-28 17:30:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:30:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:53,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:53,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:54,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:58,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:58,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 17:30:58,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:30:58,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 17:30:58,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:58,157 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:58,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 17:30:58,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 17:30:58,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 17:30:58,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:58,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:30:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:58,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:58,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:58,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:30:58,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:30:58,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 17:30:58,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:58,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:58,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:30:58,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:58,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:30:58,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:58,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 17:30:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:58,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:58,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:58,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:58,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:58,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:30:58,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-28 17:30:58,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:58,572 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 17:30:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:58,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 17:30:58,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:58,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 17:30:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:58,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:58,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:58,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:58,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:58,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:30:58,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-28 17:30:58,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:58,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:58,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:30:58,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:30:58,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:30:58,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:58,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 17:30:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:30:58,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:58,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:30:59,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:30:59,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:30:59,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:30:59,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 271 [2020-10-28 17:30:59,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:30:59,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:30:59,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 17:30:59,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:30:59,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:30:59,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:30:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 111 proven. 211 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2020-10-28 17:30:59,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53688361] [2020-10-28 17:30:59,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:30:59,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 17:30:59,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776237077] [2020-10-28 17:30:59,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 17:30:59,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:30:59,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 17:30:59,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-10-28 17:30:59,259 INFO L87 Difference]: Start difference. First operand 114 states and 146 transitions. Second operand 18 states. [2020-10-28 17:31:01,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:31:01,044 INFO L93 Difference]: Finished difference Result 339 states and 494 transitions. [2020-10-28 17:31:01,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 17:31:01,047 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 97 [2020-10-28 17:31:01,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:31:01,050 INFO L225 Difference]: With dead ends: 339 [2020-10-28 17:31:01,050 INFO L226 Difference]: Without dead ends: 243 [2020-10-28 17:31:01,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 17:31:01,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-28 17:31:01,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 190. [2020-10-28 17:31:01,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-10-28 17:31:01,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 272 transitions. [2020-10-28 17:31:01,083 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 272 transitions. Word has length 97 [2020-10-28 17:31:01,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:31:01,084 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 272 transitions. [2020-10-28 17:31:01,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 17:31:01,084 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 272 transitions. [2020-10-28 17:31:01,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 17:31:01,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:31:01,087 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 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] [2020-10-28 17:31:01,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 17:31:01,088 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:31:01,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:31:01,088 INFO L82 PathProgramCache]: Analyzing trace with hash -352099394, now seen corresponding path program 2 times [2020-10-28 17:31:01,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:31:01,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660544011] [2020-10-28 17:31:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:31:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:31:01,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:01,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:01,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:01,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:02,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:03,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:06,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:06,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:31:06,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 17:31:06,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 17:31:06,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5116 [2020-10-28 17:31:06,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:31:06,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:31:06,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 17:31:06,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 17:31:06,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 17:31:06,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:31:06,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:31:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:31:06,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:06,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:31:06,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:31:06,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:31:06,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:31:06,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:31:06,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:31:06,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:31:06,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:31:06,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:31:06,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:31:06,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 17:31:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:31:06,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:06,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:06,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:07,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:31:07,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:31:07,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:31:07,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1066 [2020-10-28 17:31:07,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:31:07,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:31:07,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 17:31:07,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:31:07,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 17:31:07,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:31:07,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 17:31:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:31:07,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:07,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:07,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:07,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:07,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:08,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:31:08,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:31:08,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:31:08,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 488 [2020-10-28 17:31:08,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:31:08,167 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:31:08,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 17:31:08,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:31:08,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 17:31:08,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:31:08,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 17:31:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:31:08,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:08,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:08,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:31:08,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:31:08,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:31:08,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-28 17:31:08,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:31:08,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:31:08,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 17:31:08,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:31:08,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:31:08,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:31:08,796 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 44 proven. 320 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-28 17:31:08,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660544011] [2020-10-28 17:31:08,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:31:08,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 17:31:08,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052668090] [2020-10-28 17:31:08,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 17:31:08,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:31:08,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 17:31:08,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2020-10-28 17:31:08,799 INFO L87 Difference]: Start difference. First operand 190 states and 272 transitions. Second operand 19 states. [2020-10-28 17:31:11,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:31:11,343 INFO L93 Difference]: Finished difference Result 572 states and 921 transitions. [2020-10-28 17:31:11,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 17:31:11,343 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-10-28 17:31:11,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:31:11,349 INFO L225 Difference]: With dead ends: 572 [2020-10-28 17:31:11,349 INFO L226 Difference]: Without dead ends: 404 [2020-10-28 17:31:11,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=328, Invalid=1652, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 17:31:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-28 17:31:11,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 394. [2020-10-28 17:31:11,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-28 17:31:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 586 transitions. [2020-10-28 17:31:11,426 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 586 transitions. Word has length 97 [2020-10-28 17:31:11,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:31:11,427 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 586 transitions. [2020-10-28 17:31:11,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 17:31:11,427 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 586 transitions. [2020-10-28 17:31:11,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 17:31:11,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:31:11,433 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 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] [2020-10-28 17:31:11,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 17:31:11,433 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:31:11,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:31:11,434 INFO L82 PathProgramCache]: Analyzing trace with hash -929330046, now seen corresponding path program 3 times [2020-10-28 17:31:11,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:31:11,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209821196] [2020-10-28 17:31:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:31:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:31:11,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:11,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:12,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:12,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:13,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:14,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:15,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:16,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:16,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:31:16,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 17:31:16,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 17:31:16,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 17:31:16,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:31:16,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:31:16,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 17:31:16,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 17:31:16,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 17:31:16,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:31:16,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:31:16,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:31:16,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:16,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:31:16,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:31:16,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:31:16,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 17:31:16,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:31:16,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:31:16,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:31:16,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:31:16,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:31:16,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:31:16,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 17:31:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:31:16,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:16,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:17,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:17,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:31:17,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:31:17,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:31:17,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 588 [2020-10-28 17:31:17,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:31:17,460 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:31:17,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 17:31:17,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:31:17,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 17:31:17,461 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:31:17,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 17:31:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:31:17,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:17,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:17,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:18,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:18,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:18,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:18,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:18,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:31:18,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:31:18,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 17:31:18,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1085 [2020-10-28 17:31:18,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:31:18,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:31:18,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 17:31:18,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:31:18,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 17:31:18,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:31:19,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 17:31:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:31:19,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:19,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:19,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:31:19,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:31:19,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:31:19,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-28 17:31:19,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:31:19,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:31:19,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 17:31:19,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:31:19,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:31:19,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:31:19,789 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 14 proven. 282 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-28 17:31:19,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209821196] [2020-10-28 17:31:19,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:31:19,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 17:31:19,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477376667] [2020-10-28 17:31:19,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 17:31:19,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:31:19,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 17:31:19,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2020-10-28 17:31:19,792 INFO L87 Difference]: Start difference. First operand 394 states and 586 transitions. Second operand 28 states. [2020-10-28 17:31:21,451 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2020-10-28 17:31:21,632 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2020-10-28 17:31:22,613 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-10-28 17:31:22,777 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-28 17:31:22,943 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-28 17:31:23,470 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2020-10-28 17:31:23,635 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-10-28 17:31:23,816 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-10-28 17:31:24,158 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-28 17:31:24,350 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-28 17:31:24,555 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-28 17:31:24,780 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-28 17:31:24,958 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-28 17:31:25,580 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-28 17:31:25,931 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-28 17:31:26,138 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2020-10-28 17:31:26,321 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2020-10-28 17:31:26,489 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-28 17:31:26,659 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-28 17:31:27,689 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2020-10-28 17:31:27,835 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-28 17:31:28,028 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62 [2020-10-28 17:31:28,199 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-28 17:31:28,387 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 63 [2020-10-28 17:31:28,598 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2020-10-28 17:31:28,773 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 57 [2020-10-28 17:31:28,943 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 61 [2020-10-28 17:31:29,134 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-28 17:31:29,360 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-10-28 17:31:29,510 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-28 17:31:29,667 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-10-28 17:31:29,868 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-10-28 17:31:30,089 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 73 [2020-10-28 17:31:30,270 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-28 17:31:30,453 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-28 17:31:30,681 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-28 17:31:30,915 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-10-28 17:31:31,138 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-10-28 17:31:31,368 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 76 [2020-10-28 17:31:31,551 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-28 17:31:31,753 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 68 [2020-10-28 17:31:31,941 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-28 17:31:32,147 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2020-10-28 17:31:32,402 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2020-10-28 17:31:32,634 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 75 [2020-10-28 17:31:32,864 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-10-28 17:31:33,073 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-28 17:31:33,261 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2020-10-28 17:31:33,478 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-10-28 17:31:33,715 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 74 [2020-10-28 17:31:33,949 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2020-10-28 17:31:34,188 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2020-10-28 17:31:34,437 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2020-10-28 17:31:34,633 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-10-28 17:31:34,841 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-10-28 17:31:35,064 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 73 [2020-10-28 17:31:35,288 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 76 [2020-10-28 17:31:35,514 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2020-10-28 17:31:35,761 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-10-28 17:31:36,006 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 80 [2020-10-28 17:31:36,263 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2020-10-28 17:31:36,515 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-10-28 17:31:36,768 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 83 [2020-10-28 17:31:37,023 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2020-10-28 17:31:37,271 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 85 [2020-10-28 17:31:37,467 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2020-10-28 17:31:37,692 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-10-28 17:31:37,937 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2020-10-28 17:31:38,172 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-10-28 17:31:38,396 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-10-28 17:31:38,649 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2020-10-28 17:31:38,878 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 77 [2020-10-28 17:31:39,108 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2020-10-28 17:31:39,460 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 70 [2020-10-28 17:31:39,753 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-10-28 17:31:39,999 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 69 [2020-10-28 17:31:40,565 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 45 [2020-10-28 17:31:40,734 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 51 [2020-10-28 17:31:40,903 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2020-10-28 17:31:41,070 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 56 [2020-10-28 17:31:41,387 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 57 [2020-10-28 17:31:41,541 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-28 17:31:41,734 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-28 17:31:41,885 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-28 17:31:42,059 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2020-10-28 17:31:42,252 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 63 [2020-10-28 17:31:42,456 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-10-28 17:31:42,618 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-28 17:31:42,825 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-10-28 17:31:43,021 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 66 [2020-10-28 17:31:43,209 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 63 [2020-10-28 17:31:43,426 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 68 [2020-10-28 17:31:43,619 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-28 17:31:43,833 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 71 [2020-10-28 17:31:44,029 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2020-10-28 17:31:44,219 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-10-28 17:31:44,434 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2020-10-28 17:31:44,665 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 72 [2020-10-28 17:31:44,877 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 69 [2020-10-28 17:31:45,077 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-10-28 17:31:45,302 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 72 [2020-10-28 17:31:45,530 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 74 [2020-10-28 17:31:45,754 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 68 [2020-10-28 17:31:45,996 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-10-28 17:31:46,215 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-10-28 17:31:47,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:31:47,240 INFO L93 Difference]: Finished difference Result 1524 states and 2278 transitions. [2020-10-28 17:31:47,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2020-10-28 17:31:47,243 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 97 [2020-10-28 17:31:47,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:31:47,254 INFO L225 Difference]: With dead ends: 1524 [2020-10-28 17:31:47,255 INFO L226 Difference]: Without dead ends: 1194 [2020-10-28 17:31:47,266 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8308 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=2868, Invalid=22254, Unknown=0, NotChecked=0, Total=25122 [2020-10-28 17:31:47,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2020-10-28 17:31:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 827. [2020-10-28 17:31:47,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 827 states. [2020-10-28 17:31:47,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1212 transitions. [2020-10-28 17:31:47,433 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1212 transitions. Word has length 97 [2020-10-28 17:31:47,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:31:47,434 INFO L481 AbstractCegarLoop]: Abstraction has 827 states and 1212 transitions. [2020-10-28 17:31:47,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 17:31:47,434 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1212 transitions. [2020-10-28 17:31:47,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 17:31:47,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:31:47,443 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 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] [2020-10-28 17:31:47,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 17:31:47,444 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:31:47,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:31:47,444 INFO L82 PathProgramCache]: Analyzing trace with hash -158630594, now seen corresponding path program 4 times [2020-10-28 17:31:47,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:31:47,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665725564] [2020-10-28 17:31:47,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:31:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:31:47,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:47,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:48,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:48,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:48,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:49,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:50,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:50,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:51,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:51,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:52,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:31:52,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 17:31:52,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 17:31:52,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 17:31:52,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:31:52,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:31:52,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 17:31:52,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 17:31:52,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-28 17:31:52,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:31:52,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:31:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:31:52,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:52,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:31:52,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:31:52,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:31:52,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 17:31:52,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:31:52,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:31:52,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:31:52,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:31:52,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:31:52,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:31:52,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 17:31:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:31:52,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:52,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:53,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:53,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:31:53,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:31:53,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:31:53,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-28 17:31:53,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:31:53,273 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:31:53,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 17:31:53,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:31:53,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 17:31:53,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:31:53,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 17:31:53,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:31:53,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:53,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:53,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:53,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:53,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:31:53,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:31:53,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 17:31:53,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 351 [2020-10-28 17:31:53,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:31:53,820 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:31:53,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:31:53,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:31:53,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:31:53,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:31:53,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 17:31:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:31:53,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:53,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:53,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:31:53,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:31:53,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:31:53,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-28 17:31:53,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:31:53,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:31:53,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 17:31:53,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:31:53,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:31:53,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:31:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 89 proven. 238 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-10-28 17:31:54,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665725564] [2020-10-28 17:31:54,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:31:54,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 17:31:54,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310073108] [2020-10-28 17:31:54,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 17:31:54,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:31:54,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 17:31:54,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-28 17:31:54,113 INFO L87 Difference]: Start difference. First operand 827 states and 1212 transitions. Second operand 17 states. [2020-10-28 17:31:57,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:31:57,144 INFO L93 Difference]: Finished difference Result 1766 states and 2798 transitions. [2020-10-28 17:31:57,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 17:31:57,146 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-10-28 17:31:57,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:31:57,164 INFO L225 Difference]: With dead ends: 1766 [2020-10-28 17:31:57,164 INFO L226 Difference]: Without dead ends: 1144 [2020-10-28 17:31:57,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=203, Invalid=1279, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 17:31:57,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2020-10-28 17:31:57,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 1135. [2020-10-28 17:31:57,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1135 states. [2020-10-28 17:31:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1135 states to 1135 states and 1814 transitions. [2020-10-28 17:31:57,428 INFO L78 Accepts]: Start accepts. Automaton has 1135 states and 1814 transitions. Word has length 97 [2020-10-28 17:31:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:31:57,428 INFO L481 AbstractCegarLoop]: Abstraction has 1135 states and 1814 transitions. [2020-10-28 17:31:57,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 17:31:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1135 states and 1814 transitions. [2020-10-28 17:31:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 17:31:57,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:31:57,447 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 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] [2020-10-28 17:31:57,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 17:31:57,447 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:31:57,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:31:57,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1146420478, now seen corresponding path program 5 times [2020-10-28 17:31:57,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:31:57,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930345198] [2020-10-28 17:31:57,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:31:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:31:57,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:57,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:57,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:58,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:58,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:58,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:59,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:31:59,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:00,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:01,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:02,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:02,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:02,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 17:32:02,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 17:32:02,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5111 [2020-10-28 17:32:02,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:02,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:02,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 17:32:02,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 17:32:02,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 17:32:02,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:02,990 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 22 [2020-10-28 17:32:03,263 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 27 [2020-10-28 17:32:03,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:32:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:03,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:03,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:03,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:32:03,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:32:03,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 17:32:03,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:03,455 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:03,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:32:03,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:03,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:32:03,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:03,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 17:32:03,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:03,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:03,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:03,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:03,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:32:03,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-10-28 17:32:03,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:03,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:03,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:32:03,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:03,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 17:32:03,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:03,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 17:32:03,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:03,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:03,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:03,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:03,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:03,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:03,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:32:03,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-28 17:32:03,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:03,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:03,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:32:03,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:03,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:32:03,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:03,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 17:32:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:03,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:03,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:03,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:03,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:32:03,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-28 17:32:03,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:03,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:03,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:32:03,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:32:03,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:32:03,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:03,903 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 89 proven. 209 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2020-10-28 17:32:03,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930345198] [2020-10-28 17:32:03,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:32:03,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 17:32:03,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901485420] [2020-10-28 17:32:03,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 17:32:03,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:32:03,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 17:32:03,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-28 17:32:03,907 INFO L87 Difference]: Start difference. First operand 1135 states and 1814 transitions. Second operand 14 states. [2020-10-28 17:32:05,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:32:05,475 INFO L93 Difference]: Finished difference Result 1907 states and 3738 transitions. [2020-10-28 17:32:05,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 17:32:05,477 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 97 [2020-10-28 17:32:05,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:32:05,504 INFO L225 Difference]: With dead ends: 1907 [2020-10-28 17:32:05,505 INFO L226 Difference]: Without dead ends: 1603 [2020-10-28 17:32:05,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-28 17:32:05,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2020-10-28 17:32:05,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1541. [2020-10-28 17:32:05,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1541 states. [2020-10-28 17:32:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 3188 transitions. [2020-10-28 17:32:05,861 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 3188 transitions. Word has length 97 [2020-10-28 17:32:05,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:32:05,862 INFO L481 AbstractCegarLoop]: Abstraction has 1541 states and 3188 transitions. [2020-10-28 17:32:05,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 17:32:05,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 3188 transitions. [2020-10-28 17:32:05,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 17:32:05,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:32:05,895 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 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] [2020-10-28 17:32:05,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 17:32:05,896 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:32:05,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:32:05,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2097609410, now seen corresponding path program 6 times [2020-10-28 17:32:05,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:32:05,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364643182] [2020-10-28 17:32:05,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:32:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:06,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:06,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:06,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:06,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:06,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:07,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:08,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:09,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:09,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:09,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:10,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:10,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:11,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:11,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 17:32:11,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 17:32:11,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 17:32:11,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:11,071 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:11,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 17:32:11,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 17:32:11,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 17:32:11,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:11,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:32:11,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:11,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:11,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:11,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:32:11,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:32:11,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 17:32:11,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:11,151 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:11,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:32:11,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:11,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:32:11,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:11,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 17:32:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:11,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:11,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:11,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:11,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:32:11,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-10-28 17:32:11,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:11,238 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:11,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:32:11,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:11,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 17:32:11,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:11,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 17:32:11,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:11,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:11,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:11,664 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:11,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:11,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:32:11,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-28 17:32:11,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:11,665 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:11,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 17:32:11,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:32:11,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:32:11,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:11,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 17:32:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:11,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:11,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:11,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:11,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:32:11,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 17:32:11,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:11,829 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:11,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:32:11,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 17:32:11,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:32:11,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:11,872 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 1 proven. 295 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-10-28 17:32:11,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364643182] [2020-10-28 17:32:11,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:32:11,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 17:32:11,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385589489] [2020-10-28 17:32:11,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 17:32:11,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:32:11,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 17:32:11,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 17:32:11,875 INFO L87 Difference]: Start difference. First operand 1541 states and 3188 transitions. Second operand 12 states. [2020-10-28 17:32:13,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:32:13,457 INFO L93 Difference]: Finished difference Result 2215 states and 4111 transitions. [2020-10-28 17:32:13,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 17:32:13,459 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 97 [2020-10-28 17:32:13,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:32:13,490 INFO L225 Difference]: With dead ends: 2215 [2020-10-28 17:32:13,490 INFO L226 Difference]: Without dead ends: 1628 [2020-10-28 17:32:13,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2020-10-28 17:32:13,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1628 states. [2020-10-28 17:32:13,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1628 to 1541. [2020-10-28 17:32:13,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1541 states. [2020-10-28 17:32:13,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1541 states to 1541 states and 2949 transitions. [2020-10-28 17:32:13,835 INFO L78 Accepts]: Start accepts. Automaton has 1541 states and 2949 transitions. Word has length 97 [2020-10-28 17:32:13,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:32:13,836 INFO L481 AbstractCegarLoop]: Abstraction has 1541 states and 2949 transitions. [2020-10-28 17:32:13,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 17:32:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 1541 states and 2949 transitions. [2020-10-28 17:32:13,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 17:32:13,871 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:32:13,871 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 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] [2020-10-28 17:32:13,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 17:32:13,872 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:32:13,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:32:13,872 INFO L82 PathProgramCache]: Analyzing trace with hash 2045803266, now seen corresponding path program 7 times [2020-10-28 17:32:13,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:32:13,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347814725] [2020-10-28 17:32:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:32:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:14,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:14,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:15,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:18,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:18,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 17:32:18,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:32:18,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 17:32:18,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:18,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:18,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 17:32:18,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 17:32:18,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 17:32:18,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:19,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:32:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:19,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:19,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:19,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:32:19,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:32:19,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 17:32:19,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:19,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:19,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:32:19,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:19,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:32:19,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:19,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 17:32:19,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:19,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:19,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:19,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:19,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:32:19,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 17:32:19,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:19,124 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:19,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:32:19,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:19,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:32:19,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:19,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 17:32:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:19,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:19,214 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:19,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:19,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:32:19,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-28 17:32:19,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:19,215 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:19,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:32:19,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:19,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 17:32:19,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:19,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 17:32:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:19,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:19,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:19,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:19,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:19,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:32:19,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 243 [2020-10-28 17:32:19,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:19,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:19,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 17:32:19,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:32:19,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:32:19,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:19,757 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 178 proven. 111 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2020-10-28 17:32:19,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347814725] [2020-10-28 17:32:19,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:32:19,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 17:32:19,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835151200] [2020-10-28 17:32:19,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 17:32:19,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:32:19,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 17:32:19,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-28 17:32:19,761 INFO L87 Difference]: Start difference. First operand 1541 states and 2949 transitions. Second operand 14 states. [2020-10-28 17:32:21,220 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-28 17:32:22,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:32:22,113 INFO L93 Difference]: Finished difference Result 1892 states and 3808 transitions. [2020-10-28 17:32:22,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 17:32:22,119 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 97 [2020-10-28 17:32:22,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:32:22,154 INFO L225 Difference]: With dead ends: 1892 [2020-10-28 17:32:22,154 INFO L226 Difference]: Without dead ends: 1718 [2020-10-28 17:32:22,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=207, Invalid=785, Unknown=0, NotChecked=0, Total=992 [2020-10-28 17:32:22,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2020-10-28 17:32:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1709. [2020-10-28 17:32:22,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1709 states. [2020-10-28 17:32:22,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 3071 transitions. [2020-10-28 17:32:22,509 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 3071 transitions. Word has length 97 [2020-10-28 17:32:22,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:32:22,510 INFO L481 AbstractCegarLoop]: Abstraction has 1709 states and 3071 transitions. [2020-10-28 17:32:22,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 17:32:22,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 3071 transitions. [2020-10-28 17:32:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 17:32:22,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:32:22,544 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 5, 5, 4, 4, 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] [2020-10-28 17:32:22,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 17:32:22,544 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:32:22,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:32:22,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1027161982, now seen corresponding path program 8 times [2020-10-28 17:32:22,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:32:22,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067767754] [2020-10-28 17:32:22,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:32:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:22,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:22,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:23,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:23,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:25,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:27,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:27,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 17:32:27,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:32:27,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 17:32:27,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:27,640 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:27,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 17:32:27,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 17:32:27,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 17:32:27,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:28,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:32:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:28,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:28,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:28,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:32:28,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:32:28,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 17:32:28,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:28,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:28,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:32:28,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:28,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:32:28,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:32:28,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 17:32:28,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:28,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:28,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:28,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:28,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:28,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:32:28,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-28 17:32:28,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:28,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 17:32:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:28,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 17:32:28,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:28,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 17:32:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:28,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:28,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:28,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:28,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:28,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:28,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:32:28,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-28 17:32:28,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:28,879 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:28,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:32:28,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:28,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:32:28,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:28,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 17:32:28,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:28,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:28,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:29,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:29,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:29,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:29,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 17:32:29,411 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 520 [2020-10-28 17:32:29,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:29,411 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:29,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 17:32:29,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:32:29,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:32:29,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 142 proven. 209 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-10-28 17:32:29,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067767754] [2020-10-28 17:32:29,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:32:29,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 17:32:29,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503187780] [2020-10-28 17:32:29,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 17:32:29,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:32:29,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 17:32:29,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-28 17:32:29,715 INFO L87 Difference]: Start difference. First operand 1709 states and 3071 transitions. Second operand 22 states. [2020-10-28 17:32:32,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:32:32,952 INFO L93 Difference]: Finished difference Result 3222 states and 5801 transitions. [2020-10-28 17:32:32,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 17:32:32,956 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 97 [2020-10-28 17:32:32,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:32:32,993 INFO L225 Difference]: With dead ends: 3222 [2020-10-28 17:32:32,993 INFO L226 Difference]: Without dead ends: 2037 [2020-10-28 17:32:33,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=327, Invalid=2025, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 17:32:33,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2037 states. [2020-10-28 17:32:33,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2037 to 2016. [2020-10-28 17:32:33,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2016 states. [2020-10-28 17:32:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 3581 transitions. [2020-10-28 17:32:33,448 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 3581 transitions. Word has length 97 [2020-10-28 17:32:33,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:32:33,448 INFO L481 AbstractCegarLoop]: Abstraction has 2016 states and 3581 transitions. [2020-10-28 17:32:33,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 17:32:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 3581 transitions. [2020-10-28 17:32:33,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 17:32:33,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:32:33,477 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 5, 5, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:32:33,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 17:32:33,477 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:32:33,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:32:33,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1359294786, now seen corresponding path program 9 times [2020-10-28 17:32:33,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:32:33,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120544958] [2020-10-28 17:32:33,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:32:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:33,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:36,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:36,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 17:32:36,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:32:36,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2782 [2020-10-28 17:32:36,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:36,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:36,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 17:32:36,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-28 17:32:36,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-28 17:32:36,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:36,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:32:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:36,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:36,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:36,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:32:36,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:32:36,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:32:36,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:36,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:36,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:32:36,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:36,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:32:36,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:36,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 17:32:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:36,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:36,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:36,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:36,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:32:36,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-28 17:32:36,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:36,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:36,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 17:32:36,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:36,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 17:32:36,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:36,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 17:32:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:36,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:37,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:37,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:37,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:32:37,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-28 17:32:37,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:37,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:37,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 17:32:37,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:37,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:32:37,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:37,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 17:32:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:37,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:37,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:37,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:37,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:32:37,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-28 17:32:37,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:37,334 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:37,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 17:32:37,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:37,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:32:37,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:37,476 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 294 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2020-10-28 17:32:37,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120544958] [2020-10-28 17:32:37,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:32:37,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 17:32:37,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287615656] [2020-10-28 17:32:37,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 17:32:37,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:32:37,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 17:32:37,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-28 17:32:37,479 INFO L87 Difference]: Start difference. First operand 2016 states and 3581 transitions. Second operand 15 states. [2020-10-28 17:32:39,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:32:39,166 INFO L93 Difference]: Finished difference Result 2270 states and 4514 transitions. [2020-10-28 17:32:39,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 17:32:39,168 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 97 [2020-10-28 17:32:39,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:32:39,207 INFO L225 Difference]: With dead ends: 2270 [2020-10-28 17:32:39,207 INFO L226 Difference]: Without dead ends: 2264 [2020-10-28 17:32:39,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2020-10-28 17:32:39,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2020-10-28 17:32:39,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2077. [2020-10-28 17:32:39,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2077 states. [2020-10-28 17:32:39,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2077 states to 2077 states and 3788 transitions. [2020-10-28 17:32:39,802 INFO L78 Accepts]: Start accepts. Automaton has 2077 states and 3788 transitions. Word has length 97 [2020-10-28 17:32:39,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:32:39,802 INFO L481 AbstractCegarLoop]: Abstraction has 2077 states and 3788 transitions. [2020-10-28 17:32:39,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 17:32:39,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2077 states and 3788 transitions. [2020-10-28 17:32:39,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 17:32:39,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:32:39,832 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 11, 5, 5, 4, 4, 4, 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] [2020-10-28 17:32:39,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 17:32:39,832 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:32:39,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:32:39,832 INFO L82 PathProgramCache]: Analyzing trace with hash -229053116, now seen corresponding path program 10 times [2020-10-28 17:32:39,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:32:39,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037626238] [2020-10-28 17:32:39,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:32:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:40,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:40,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:40,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:40,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:41,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:41,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:42,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:44,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:44,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:44,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:44,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-28 17:32:44,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 17:32:44,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 17:32:44,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:44,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:44,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 17:32:44,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 17:32:44,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-28 17:32:44,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:45,322 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2020-10-28 17:32:45,529 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 40 [2020-10-28 17:32:45,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:32:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:45,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:45,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:45,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:32:45,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:32:45,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 17:32:45,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:45,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:45,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:32:45,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:45,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:32:45,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:32:45,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 17:32:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:45,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:45,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:45,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:46,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:46,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:46,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:46,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 17:32:46,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 521 [2020-10-28 17:32:46,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:46,235 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:46,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 17:32:46,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:46,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 17:32:46,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:46,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-10-28 17:32:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:46,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:46,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:46,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:46,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:47,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:47,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:47,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 17:32:47,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 657 [2020-10-28 17:32:47,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:47,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:47,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 17:32:47,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:32:47,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:32:47,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:47,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-28 17:32:47,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:32:47,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:47,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:32:47,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:32:47,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:32:47,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:32:47,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 249 [2020-10-28 17:32:47,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:32:47,487 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:32:47,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 17:32:47,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:32:47,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:32:47,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:32:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 92 proven. 253 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-28 17:32:48,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037626238] [2020-10-28 17:32:48,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:32:48,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 17:32:48,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037843290] [2020-10-28 17:32:48,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 17:32:48,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:32:48,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 17:32:48,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2020-10-28 17:32:48,098 INFO L87 Difference]: Start difference. First operand 2077 states and 3788 transitions. Second operand 25 states. [2020-10-28 17:32:50,630 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-28 17:32:50,948 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 58 [2020-10-28 17:32:51,289 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-28 17:32:51,569 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-28 17:32:51,872 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 69 [2020-10-28 17:32:52,118 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-28 17:32:52,300 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-28 17:32:52,487 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-28 17:32:52,692 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-28 17:32:52,865 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-28 17:32:53,204 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-28 17:32:53,399 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2020-10-28 17:32:53,765 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-28 17:32:53,947 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-28 17:32:54,239 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60