/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=DEEPEST --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/array-tiling/mbpr3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:52:09,719 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:52:09,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:52:09,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:52:09,768 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:52:09,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:52:09,776 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:52:09,780 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:52:09,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:52:09,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:52:09,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:52:09,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:52:09,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:52:09,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:52:09,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:52:09,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:52:09,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:52:09,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:52:09,811 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:52:09,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:52:09,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:52:09,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:52:09,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:52:09,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:52:09,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:52:09,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:52:09,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:52:09,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:52:09,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:52:09,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 14:52:09,850 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 14:52:09,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 14:52:09,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 14:52:09,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 14:52:09,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 14:52:09,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 14:52:09,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 14:52:09,855 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 14:52:09,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:52:09,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:52:09,857 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:52:09,864 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 [2020-10-27 14:52:09,913 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:52:09,913 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:52:09,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:52:09,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:52:09,917 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:52:09,918 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:52:09,918 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:52:09,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:52:09,919 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:52:09,919 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:52:09,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:52:09,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:52:09,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:52:09,921 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:52:09,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:52:09,921 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:52:09,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:52:09,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:52:09,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:52:09,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:52:09,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:52:09,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:52:09,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:52:09,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:52:09,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:52:09,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:52:09,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:52:09,923 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:52:09,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:52:09,924 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:52:10,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:52:10,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:52:10,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:52:10,423 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:52:10,423 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:52:10,424 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/mbpr3.c [2020-10-27 14:52:10,509 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b912976d6/ae1561dc2489478e9f8523094a79f56b/FLAG471dce140 [2020-10-27 14:52:11,070 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:52:11,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/mbpr3.c [2020-10-27 14:52:11,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b912976d6/ae1561dc2489478e9f8523094a79f56b/FLAG471dce140 [2020-10-27 14:52:11,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b912976d6/ae1561dc2489478e9f8523094a79f56b [2020-10-27 14:52:11,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:52:11,451 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:52:11,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:52:11,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:52:11,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:52:11,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:52:11" (1/1) ... [2020-10-27 14:52:11,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13e7fbaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:11, skipping insertion in model container [2020-10-27 14:52:11,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:52:11" (1/1) ... [2020-10-27 14:52:11,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:52:11,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:52:11,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:52:11,680 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:52:11,713 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:52:11,740 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:52:11,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:11 WrapperNode [2020-10-27 14:52:11,743 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:52:11,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:52:11,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:52:11,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:52:11,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:11" (1/1) ... [2020-10-27 14:52:11,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:11" (1/1) ... [2020-10-27 14:52:11,788 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:11" (1/1) ... [2020-10-27 14:52:11,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:11" (1/1) ... [2020-10-27 14:52:11,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:11" (1/1) ... [2020-10-27 14:52:11,829 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:11" (1/1) ... [2020-10-27 14:52:11,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:11" (1/1) ... [2020-10-27 14:52:11,843 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:52:11,844 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:52:11,844 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:52:11,844 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:52:11,846 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:11" (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 [2020-10-27 14:52:11,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:52:11,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:52:11,940 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:52:11,940 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 14:52:11,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:52:11,940 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:52:11,940 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:52:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:52:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:52:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:52:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 14:52:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:52:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:52:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:52:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:52:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:52:11,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:52:11,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:52:11,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:52:11,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:52:12,573 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:52:12,574 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-27 14:52:12,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:52:12 BoogieIcfgContainer [2020-10-27 14:52:12,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:52:12,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:52:12,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:52:12,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:52:12,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:52:11" (1/3) ... [2020-10-27 14:52:12,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e72eb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:52:12, skipping insertion in model container [2020-10-27 14:52:12,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:52:11" (2/3) ... [2020-10-27 14:52:12,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e72eb3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:52:12, skipping insertion in model container [2020-10-27 14:52:12,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:52:12" (3/3) ... [2020-10-27 14:52:12,590 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr3.c [2020-10-27 14:52:12,603 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:52:12,610 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:52:12,625 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:52:12,675 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:52:12,676 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:52:12,676 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:52:12,676 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:52:12,676 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:52:12,676 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:52:12,676 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:52:12,677 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:52:12,701 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-27 14:52:12,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:52:12,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:12,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:12,709 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:12,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:12,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1931093547, now seen corresponding path program 1 times [2020-10-27 14:52:12,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:12,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949230129] [2020-10-27 14:52:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:12,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:12,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:13,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:13,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:13,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:13,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:52:13,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:52:13,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 353 [2020-10-27 14:52:13,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:13,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:13,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:52:13,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:13,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 14:52:13,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:13,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:13,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:13,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:13,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:13,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:52:13,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:13,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:13,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:13,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:13,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:13,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:52:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:13,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:13,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:13,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:13,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:13,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:52:13,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:52:13,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:13,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:13,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 14:52:13,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:13,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:52:13,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949230129] [2020-10-27 14:52:13,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:52:13,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 14:52:13,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864998937] [2020-10-27 14:52:13,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 14:52:13,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:13,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 14:52:13,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:52:13,445 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-10-27 14:52:13,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:13,594 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2020-10-27 14:52:13,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 14:52:13,596 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-10-27 14:52:13,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:13,605 INFO L225 Difference]: With dead ends: 86 [2020-10-27 14:52:13,606 INFO L226 Difference]: Without dead ends: 41 [2020-10-27 14:52:13,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 14:52:13,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-27 14:52:13,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-27 14:52:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 14:52:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2020-10-27 14:52:13,655 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 27 [2020-10-27 14:52:13,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:13,656 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2020-10-27 14:52:13,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 14:52:13,656 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2020-10-27 14:52:13,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 14:52:13,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:13,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:13,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:52:13,658 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:13,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:13,659 INFO L82 PathProgramCache]: Analyzing trace with hash -525347130, now seen corresponding path program 1 times [2020-10-27 14:52:13,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:13,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122811805] [2020-10-27 14:52:13,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:13,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:13,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:13,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:13,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:13,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:14,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:14,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:14,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:15,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:15,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:15,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:15,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:15,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:16,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:16,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 14:52:16,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:52:16,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3180 [2020-10-27 14:52:16,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:16,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:52:16,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:52:16,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 14:52:16,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:17,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:17,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:17,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:17,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:17,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:17,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 14:52:17,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:17,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:17,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:17,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:52:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:17,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:17,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:17,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:17,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:17,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 14:52:17,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:17,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:52:17,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:17,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:52:17,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:52:17,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122811805] [2020-10-27 14:52:17,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:52:17,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 14:52:17,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141151072] [2020-10-27 14:52:17,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:52:17,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:17,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:52:17,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:52:17,135 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand 9 states. [2020-10-27 14:52:17,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:17,760 INFO L93 Difference]: Finished difference Result 86 states and 108 transitions. [2020-10-27 14:52:17,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:52:17,760 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 14:52:17,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:17,764 INFO L225 Difference]: With dead ends: 86 [2020-10-27 14:52:17,764 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 14:52:17,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:52:17,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 14:52:17,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2020-10-27 14:52:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 14:52:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2020-10-27 14:52:17,781 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 27 [2020-10-27 14:52:17,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:17,781 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2020-10-27 14:52:17,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:52:17,781 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2020-10-27 14:52:17,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:52:17,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:17,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:17,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:52:17,783 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:17,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1713267339, now seen corresponding path program 1 times [2020-10-27 14:52:17,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:17,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562433951] [2020-10-27 14:52:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:17,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:17,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:17,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:18,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:18,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:18,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:19,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:19,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:20,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:20,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:20,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:22,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:22,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:52:22,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:52:22,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:52:22,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:22,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:52:22,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:52:22,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:52:22,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:23,183 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-27 14:52:23,357 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 23 [2020-10-27 14:52:23,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:23,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:23,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:23,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:23,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:23,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:52:23,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:23,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:23,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:23,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:23,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:23,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:52:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:23,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:23,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:23,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:23,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:23,949 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:23,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:23,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:23,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:23,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:23,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:23,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:52:23,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562433951] [2020-10-27 14:52:23,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:23,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:52:23,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737759431] [2020-10-27 14:52:23,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:52:23,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:23,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:52:23,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:52:23,985 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand 17 states. [2020-10-27 14:52:24,340 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-27 14:52:24,988 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-27 14:52:25,434 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 36 [2020-10-27 14:52:25,831 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2020-10-27 14:52:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:27,176 INFO L93 Difference]: Finished difference Result 130 states and 166 transitions. [2020-10-27 14:52:27,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:52:27,178 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-10-27 14:52:27,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:27,180 INFO L225 Difference]: With dead ends: 130 [2020-10-27 14:52:27,181 INFO L226 Difference]: Without dead ends: 127 [2020-10-27 14:52:27,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=295, Invalid=1511, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 14:52:27,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-27 14:52:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 67. [2020-10-27 14:52:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 14:52:27,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2020-10-27 14:52:27,220 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 39 [2020-10-27 14:52:27,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:27,221 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2020-10-27 14:52:27,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:52:27,221 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2020-10-27 14:52:27,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 14:52:27,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:27,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:27,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:52:27,225 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:27,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:27,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1579253833, now seen corresponding path program 1 times [2020-10-27 14:52:27,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:27,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [763539501] [2020-10-27 14:52:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:27,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:27,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:27,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:27,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:27,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:28,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:28,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:29,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:29,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:29,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:32,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:32,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 14:52:32,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:52:32,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:52:32,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:32,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:52:32,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 14:52:32,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 14:52:32,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:32,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:32,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:32,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:32,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:32,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:32,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 14:52:32,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:32,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:32,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:32,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:32,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:32,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:52:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:32,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:32,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:32,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:32,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:32,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:52:32,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:32,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:32,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:32,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:32,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:52:32,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [763539501] [2020-10-27 14:52:32,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:32,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:52:32,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414801173] [2020-10-27 14:52:32,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:52:32,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:32,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:52:32,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:52:32,992 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand 13 states. [2020-10-27 14:52:33,383 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-27 14:52:33,662 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2020-10-27 14:52:34,252 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-27 14:52:34,931 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-27 14:52:35,351 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-27 14:52:35,631 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 51 [2020-10-27 14:52:35,875 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-10-27 14:52:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:36,117 INFO L93 Difference]: Finished difference Result 148 states and 188 transitions. [2020-10-27 14:52:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:52:36,118 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-27 14:52:36,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:36,122 INFO L225 Difference]: With dead ends: 148 [2020-10-27 14:52:36,122 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 14:52:36,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:52:36,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 14:52:36,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2020-10-27 14:52:36,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-27 14:52:36,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 111 transitions. [2020-10-27 14:52:36,146 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 111 transitions. Word has length 39 [2020-10-27 14:52:36,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:36,146 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 111 transitions. [2020-10-27 14:52:36,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:52:36,147 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 111 transitions. [2020-10-27 14:52:36,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 14:52:36,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:36,148 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:36,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:52:36,149 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:36,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:36,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1484142992, now seen corresponding path program 2 times [2020-10-27 14:52:36,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:36,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164928286] [2020-10-27 14:52:36,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:36,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:36,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:36,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:36,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:37,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:38,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:38,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:39,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:39,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:41,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:41,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 14:52:41,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:52:41,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:52:41,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:41,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:52:41,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:52:41,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 14:52:41,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:41,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:41,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:41,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:41,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:41,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:41,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:41,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:52:41,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:41,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:41,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:41,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:41,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:41,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:52:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:41,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:41,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:41,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:41,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:41,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:41,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:41,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:41,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:41,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:41,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:52:41,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164928286] [2020-10-27 14:52:41,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:41,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:52:41,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199330950] [2020-10-27 14:52:41,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:52:41,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:41,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:52:41,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:52:41,319 INFO L87 Difference]: Start difference. First operand 90 states and 111 transitions. Second operand 8 states. [2020-10-27 14:52:41,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:41,887 INFO L93 Difference]: Finished difference Result 192 states and 240 transitions. [2020-10-27 14:52:41,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:52:41,888 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-27 14:52:41,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:41,891 INFO L225 Difference]: With dead ends: 192 [2020-10-27 14:52:41,891 INFO L226 Difference]: Without dead ends: 156 [2020-10-27 14:52:41,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:52:41,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-27 14:52:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 94. [2020-10-27 14:52:41,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 14:52:41,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2020-10-27 14:52:41,928 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 43 [2020-10-27 14:52:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:41,928 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2020-10-27 14:52:41,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:52:41,929 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2020-10-27 14:52:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 14:52:41,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:41,931 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:41,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:52:41,932 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:41,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:41,932 INFO L82 PathProgramCache]: Analyzing trace with hash 492046059, now seen corresponding path program 3 times [2020-10-27 14:52:41,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:41,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203661529] [2020-10-27 14:52:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:41,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:41,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:41,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:42,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:42,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:42,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:43,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:45,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:45,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-27 14:52:45,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:52:45,864 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3912 [2020-10-27 14:52:45,864 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:45,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:52:45,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:52:45,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:52:45,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:45,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:45,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:45,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:45,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:45,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:45,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 14:52:45,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:45,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:45,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:45,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:45,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:45,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:52:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:45,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:45,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:45,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:45,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:45,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:45,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:45,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:45,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:45,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:45,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:45,992 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:52:45,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203661529] [2020-10-27 14:52:45,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:45,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:52:45,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705326931] [2020-10-27 14:52:45,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:52:45,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:45,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:52:45,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:52:45,997 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand 8 states. [2020-10-27 14:52:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:46,519 INFO L93 Difference]: Finished difference Result 187 states and 233 transitions. [2020-10-27 14:52:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:52:46,520 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 47 [2020-10-27 14:52:46,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:46,522 INFO L225 Difference]: With dead ends: 187 [2020-10-27 14:52:46,523 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 14:52:46,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:52:46,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 14:52:46,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 94. [2020-10-27 14:52:46,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-27 14:52:46,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2020-10-27 14:52:46,546 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 47 [2020-10-27 14:52:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:46,546 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2020-10-27 14:52:46,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:52:46,546 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2020-10-27 14:52:46,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:52:46,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:46,548 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:46,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:52:46,548 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:46,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:46,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1714383153, now seen corresponding path program 1 times [2020-10-27 14:52:46,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:46,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189396053] [2020-10-27 14:52:46,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:46,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:46,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:46,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:46,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:46,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:46,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:46,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:47,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:47,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:47,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:47,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:51,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:51,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:52:51,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:52:51,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:52:51,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:51,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:52:51,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:52:51,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 14:52:51,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:52,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:52,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:52,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:52,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:52,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:52,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:52:52,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:52,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:52,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:52:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:52,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:52,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:52,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:52,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:52,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:52:52,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:52,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:52,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:52,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:52,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:52,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 14:52:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:52,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:52,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:52,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:52,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:52,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:52:52,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:52,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:52:52,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:52,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:52:52,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:52:52,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189396053] [2020-10-27 14:52:52,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:52,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:52:52,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627406138] [2020-10-27 14:52:52,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:52:52,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:52,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:52:52,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:52:52,099 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand 14 states. [2020-10-27 14:52:53,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:52:53,792 INFO L93 Difference]: Finished difference Result 199 states and 244 transitions. [2020-10-27 14:52:53,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:52:53,793 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-27 14:52:53,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:52:53,795 INFO L225 Difference]: With dead ends: 199 [2020-10-27 14:52:53,795 INFO L226 Difference]: Without dead ends: 182 [2020-10-27 14:52:53,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=179, Invalid=691, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:52:53,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-27 14:52:53,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-27 14:52:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 14:52:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2020-10-27 14:52:53,838 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 142 transitions. Word has length 48 [2020-10-27 14:52:53,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:52:53,838 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 142 transitions. [2020-10-27 14:52:53,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:52:53,838 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 142 transitions. [2020-10-27 14:52:53,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:52:53,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:52:53,847 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:52:53,847 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:52:53,847 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:52:53,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:52:53,848 INFO L82 PathProgramCache]: Analyzing trace with hash -657356109, now seen corresponding path program 1 times [2020-10-27 14:52:53,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:52:53,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612292892] [2020-10-27 14:52:53,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:52:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:53,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:53,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:53,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:53,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:54,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:54,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:54,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:54,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:54,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:54,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:54,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:55,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:58,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:58,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 14:52:58,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:52:58,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:52:58,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:58,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:52:58,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:52:58,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:52:58,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:59,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:52:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:59,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:59,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:59,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:52:59,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:59,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:52:59,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:59,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:59,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:59,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:52:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:59,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:59,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:59,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:59,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:59,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:52:59,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:59,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:52:59,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:59,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:52:59,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:59,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 14:52:59,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:52:59,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:52:59,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:52:59,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:52:59,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:52:59,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:52:59,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:52:59,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:52:59,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:52:59,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:52:59,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:52:59,511 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:52:59,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612292892] [2020-10-27 14:52:59,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:52:59,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:52:59,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109974177] [2020-10-27 14:52:59,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:52:59,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:52:59,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:52:59,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:52:59,514 INFO L87 Difference]: Start difference. First operand 121 states and 142 transitions. Second operand 16 states. [2020-10-27 14:53:00,355 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-27 14:53:01,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:01,408 INFO L93 Difference]: Finished difference Result 179 states and 214 transitions. [2020-10-27 14:53:01,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:53:01,409 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 48 [2020-10-27 14:53:01,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:01,411 INFO L225 Difference]: With dead ends: 179 [2020-10-27 14:53:01,412 INFO L226 Difference]: Without dead ends: 176 [2020-10-27 14:53:01,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:53:01,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-27 14:53:01,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 139. [2020-10-27 14:53:01,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-27 14:53:01,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 163 transitions. [2020-10-27 14:53:01,446 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 163 transitions. Word has length 48 [2020-10-27 14:53:01,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:01,449 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 163 transitions. [2020-10-27 14:53:01,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:53:01,449 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 163 transitions. [2020-10-27 14:53:01,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:53:01,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:01,451 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:01,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:53:01,452 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:01,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:01,452 INFO L82 PathProgramCache]: Analyzing trace with hash -914147420, now seen corresponding path program 4 times [2020-10-27 14:53:01,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:01,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857905410] [2020-10-27 14:53:01,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:01,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:01,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:01,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:01,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:01,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:01,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:02,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:02,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:02,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:02,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:02,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:03,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:03,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:03,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:04,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:04,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:05,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:06,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:06,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:53:06,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 14:53:06,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:53:06,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:06,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:53:06,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:53:06,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:53:06,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:06,714 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-27 14:53:06,890 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2020-10-27 14:53:07,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:07,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:07,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:07,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:07,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:07,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:53:07,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:07,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:07,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:07,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:07,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:07,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:53:07,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:07,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:07,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:07,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:07,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:07,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:53:07,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:07,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:07,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:07,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:07,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:53:07,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857905410] [2020-10-27 14:53:07,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:07,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:53:07,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286370007] [2020-10-27 14:53:07,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:53:07,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:07,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:53:07,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:53:07,564 INFO L87 Difference]: Start difference. First operand 139 states and 163 transitions. Second operand 18 states. [2020-10-27 14:53:08,207 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-27 14:53:08,418 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-27 14:53:08,926 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-27 14:53:09,103 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-27 14:53:09,397 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-27 14:53:09,641 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 48 [2020-10-27 14:53:09,923 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-27 14:53:10,411 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 41 [2020-10-27 14:53:10,637 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-27 14:53:10,830 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-10-27 14:53:11,155 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 42 [2020-10-27 14:53:11,631 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-10-27 14:53:12,108 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-10-27 14:53:12,409 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-27 14:53:12,624 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-27 14:53:13,196 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2020-10-27 14:53:13,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:13,448 INFO L93 Difference]: Finished difference Result 240 states and 296 transitions. [2020-10-27 14:53:13,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:53:13,449 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-10-27 14:53:13,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:13,452 INFO L225 Difference]: With dead ends: 240 [2020-10-27 14:53:13,452 INFO L226 Difference]: Without dead ends: 237 [2020-10-27 14:53:13,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=388, Invalid=2162, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 14:53:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-27 14:53:13,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 184. [2020-10-27 14:53:13,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-27 14:53:13,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 223 transitions. [2020-10-27 14:53:13,492 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 223 transitions. Word has length 51 [2020-10-27 14:53:13,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:13,492 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 223 transitions. [2020-10-27 14:53:13,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:53:13,492 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 223 transitions. [2020-10-27 14:53:13,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:53:13,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:13,494 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:13,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:53:13,494 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:13,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:13,495 INFO L82 PathProgramCache]: Analyzing trace with hash -519780634, now seen corresponding path program 1 times [2020-10-27 14:53:13,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:13,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717347701] [2020-10-27 14:53:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:13,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:13,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:13,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:13,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:13,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:13,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:53:13,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:53:13,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-27 14:53:13,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:13,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:53:13,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:53:13,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:53:13,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:13,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:13,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:13,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:13,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:13,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:13,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:13,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:13,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:13,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:13,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:13,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:13,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:13,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:53:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:13,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:13,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:13,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:13,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:13,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:53:13,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:13,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:13,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:13,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:13,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:53:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-27 14:53:13,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717347701] [2020-10-27 14:53:13,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:53:13,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:53:13,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56349716] [2020-10-27 14:53:13,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:53:13,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:13,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:53:13,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:53:13,725 INFO L87 Difference]: Start difference. First operand 184 states and 223 transitions. Second operand 4 states. [2020-10-27 14:53:13,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:13,872 INFO L93 Difference]: Finished difference Result 241 states and 292 transitions. [2020-10-27 14:53:13,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:53:13,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-10-27 14:53:13,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:13,873 INFO L225 Difference]: With dead ends: 241 [2020-10-27 14:53:13,874 INFO L226 Difference]: Without dead ends: 103 [2020-10-27 14:53:13,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:53:13,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-27 14:53:13,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-27 14:53:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 14:53:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2020-10-27 14:53:13,897 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 51 [2020-10-27 14:53:13,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:13,898 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2020-10-27 14:53:13,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:53:13,899 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2020-10-27 14:53:13,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 14:53:13,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:13,899 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:13,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:53:13,900 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:13,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:13,902 INFO L82 PathProgramCache]: Analyzing trace with hash -794540248, now seen corresponding path program 2 times [2020-10-27 14:53:13,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:13,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152324997] [2020-10-27 14:53:13,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:13,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:13,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:14,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:14,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:14,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:14,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:14,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:15,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:17,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:17,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:17,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:17,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:17,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:17,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:18,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:18,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:18,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 14:53:18,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 14:53:18,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-27 14:53:18,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:18,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:53:18,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:53:18,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:53:18,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:19,258 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 46 [2020-10-27 14:53:19,444 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2020-10-27 14:53:19,707 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-27 14:53:20,087 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-27 14:53:20,260 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 40 [2020-10-27 14:53:20,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:20,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:20,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:20,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:20,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:20,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:53:20,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:20,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:20,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:20,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:20,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:20,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:53:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:20,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:20,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:20,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:20,817 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:20,817 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:20,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:20,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:20,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:20,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:20,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:53:20,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152324997] [2020-10-27 14:53:20,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:20,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:53:20,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721512944] [2020-10-27 14:53:20,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:53:20,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:20,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:53:20,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:53:20,843 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand 17 states. [2020-10-27 14:53:21,220 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-27 14:53:21,435 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-27 14:53:21,739 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-27 14:53:22,197 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-27 14:53:22,579 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 86 [2020-10-27 14:53:22,781 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-27 14:53:23,035 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-27 14:53:23,253 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 53 [2020-10-27 14:53:23,670 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-10-27 14:53:23,995 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2020-10-27 14:53:24,288 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-27 14:53:24,463 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2020-10-27 14:53:24,822 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 84 [2020-10-27 14:53:25,177 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-27 14:53:25,461 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 59 [2020-10-27 14:53:26,028 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 79 [2020-10-27 14:53:26,388 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-10-27 14:53:26,744 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2020-10-27 14:53:27,062 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2020-10-27 14:53:27,288 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 43 [2020-10-27 14:53:27,492 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-27 14:53:27,878 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2020-10-27 14:53:28,288 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2020-10-27 14:53:28,794 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 78 [2020-10-27 14:53:29,108 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-27 14:53:29,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:29,439 INFO L93 Difference]: Finished difference Result 176 states and 214 transitions. [2020-10-27 14:53:29,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:53:29,440 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2020-10-27 14:53:29,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:29,442 INFO L225 Difference]: With dead ends: 176 [2020-10-27 14:53:29,442 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 14:53:29,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=397, Invalid=2053, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 14:53:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 14:53:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-27 14:53:29,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 14:53:29,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2020-10-27 14:53:29,466 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 51 [2020-10-27 14:53:29,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:29,467 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2020-10-27 14:53:29,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:53:29,467 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2020-10-27 14:53:29,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:53:29,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:29,468 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:29,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:53:29,468 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:29,469 INFO L82 PathProgramCache]: Analyzing trace with hash 144749687, now seen corresponding path program 1 times [2020-10-27 14:53:29,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:29,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017672438] [2020-10-27 14:53:29,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:29,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:29,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:29,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:29,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:30,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:30,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:53:30,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:53:30,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1269 [2020-10-27 14:53:30,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:30,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:53:30,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:53:30,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 14:53:30,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:30,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:30,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:30,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:30,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:30,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:30,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:30,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:30,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:30,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:30,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:30,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:30,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:53:30,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:30,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:30,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:30,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:30,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:30,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:53:30,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:30,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:30,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:30,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:30,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:30,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 14:53:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:30,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:30,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:30,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:30,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:30,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:30,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:30,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:53:30,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:30,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:53:30,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:30,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-27 14:53:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:30,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:30,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:30,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:30,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:30,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:30,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:30,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:53:30,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:30,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:53:30,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:53:30,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017672438] [2020-10-27 14:53:30,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:30,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:53:30,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716924791] [2020-10-27 14:53:30,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:53:30,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:30,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:53:30,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:53:30,916 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 10 states. [2020-10-27 14:53:31,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:31,555 INFO L93 Difference]: Finished difference Result 220 states and 265 transitions. [2020-10-27 14:53:31,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:53:31,556 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 57 [2020-10-27 14:53:31,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:31,559 INFO L225 Difference]: With dead ends: 220 [2020-10-27 14:53:31,559 INFO L226 Difference]: Without dead ends: 203 [2020-10-27 14:53:31,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:53:31,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-27 14:53:31,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 174. [2020-10-27 14:53:31,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-27 14:53:31,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 211 transitions. [2020-10-27 14:53:31,603 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 211 transitions. Word has length 57 [2020-10-27 14:53:31,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:31,603 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 211 transitions. [2020-10-27 14:53:31,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:53:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 211 transitions. [2020-10-27 14:53:31,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 14:53:31,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:31,605 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:31,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:53:31,605 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:31,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:31,606 INFO L82 PathProgramCache]: Analyzing trace with hash 167381941, now seen corresponding path program 1 times [2020-10-27 14:53:31,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:31,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145246009] [2020-10-27 14:53:31,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:31,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:31,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:31,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:31,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:31,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:31,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:32,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:32,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:33,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:33,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:33,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:33,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:33,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:33,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:33,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:33,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:34,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:36,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:36,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 14:53:36,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-27 14:53:36,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:53:36,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:36,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:53:36,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:53:36,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:53:36,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:36,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:36,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:36,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:36,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:36,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:36,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:36,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:36,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:36,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:36,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:36,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:36,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:53:36,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:36,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:36,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:36,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:36,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:36,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:53:36,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:36,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:36,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:36,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:36,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:36,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 14:53:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:36,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:36,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:36,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:36,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:36,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:36,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:36,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:53:36,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:36,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:53:36,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:36,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-27 14:53:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:36,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:36,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:36,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:36,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:36,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:36,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:36,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:53:36,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:36,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:53:36,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:36,818 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:53:36,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145246009] [2020-10-27 14:53:36,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:36,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:53:36,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539284195] [2020-10-27 14:53:36,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:53:36,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:36,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:53:36,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:53:36,822 INFO L87 Difference]: Start difference. First operand 174 states and 211 transitions. Second operand 12 states. [2020-10-27 14:53:37,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:37,742 INFO L93 Difference]: Finished difference Result 242 states and 297 transitions. [2020-10-27 14:53:37,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:53:37,743 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-27 14:53:37,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:37,746 INFO L225 Difference]: With dead ends: 242 [2020-10-27 14:53:37,746 INFO L226 Difference]: Without dead ends: 239 [2020-10-27 14:53:37,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:53:37,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-27 14:53:37,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 215. [2020-10-27 14:53:37,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-27 14:53:37,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 265 transitions. [2020-10-27 14:53:37,792 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 265 transitions. Word has length 57 [2020-10-27 14:53:37,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:37,793 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 265 transitions. [2020-10-27 14:53:37,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:53:37,793 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 265 transitions. [2020-10-27 14:53:37,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 14:53:37,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:37,794 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:37,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:53:37,795 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:37,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:37,795 INFO L82 PathProgramCache]: Analyzing trace with hash 591777182, now seen corresponding path program 3 times [2020-10-27 14:53:37,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:37,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393369930] [2020-10-27 14:53:37,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:37,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:37,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:37,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:38,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:38,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:38,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:42,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:42,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 14:53:42,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:53:42,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:53:42,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:42,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:53:42,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:53:42,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 14:53:42,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:42,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:42,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:42,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:42,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:42,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:42,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:42,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:53:42,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:42,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:42,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:42,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:42,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:42,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:53:42,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:42,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:42,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:42,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:42,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:42,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:42,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:42,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:42,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:42,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:42,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:53:43,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393369930] [2020-10-27 14:53:43,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:43,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:53:43,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879417272] [2020-10-27 14:53:43,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:53:43,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:43,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:53:43,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:53:43,016 INFO L87 Difference]: Start difference. First operand 215 states and 265 transitions. Second operand 10 states. [2020-10-27 14:53:43,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:43,853 INFO L93 Difference]: Finished difference Result 434 states and 551 transitions. [2020-10-27 14:53:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:53:43,854 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-10-27 14:53:43,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:43,856 INFO L225 Difference]: With dead ends: 434 [2020-10-27 14:53:43,857 INFO L226 Difference]: Without dead ends: 326 [2020-10-27 14:53:43,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:53:43,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-10-27 14:53:43,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 269. [2020-10-27 14:53:43,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2020-10-27 14:53:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 329 transitions. [2020-10-27 14:53:43,924 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 329 transitions. Word has length 59 [2020-10-27 14:53:43,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:43,924 INFO L481 AbstractCegarLoop]: Abstraction has 269 states and 329 transitions. [2020-10-27 14:53:43,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:53:43,924 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 329 transitions. [2020-10-27 14:53:43,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 14:53:43,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:43,926 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:43,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:53:43,926 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:43,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:43,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1090397276, now seen corresponding path program 2 times [2020-10-27 14:53:43,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:43,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310925717] [2020-10-27 14:53:43,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:43,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:43,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:44,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:44,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:44,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:44,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:44,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:44,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:45,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:45,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:45,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:46,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:46,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:46,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:48,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:48,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 14:53:48,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:53:48,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:53:48,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:48,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:53:48,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:53:48,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 14:53:48,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:49,146 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2020-10-27 14:53:49,287 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-27 14:53:49,537 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-27 14:53:50,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:50,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:50,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:50,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:50,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:50,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:50,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:53:50,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:50,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:50,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:50,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:50,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:50,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:53:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:50,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:50,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:50,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:50,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:50,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:53:50,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:50,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:50,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:50,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:50,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:50,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:53:50,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:50,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:50,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:50,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:50,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:50,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:53:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:50,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:53:50,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 14:53:50,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310925717] [2020-10-27 14:53:50,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:50,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:53:50,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331340157] [2020-10-27 14:53:50,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:53:50,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:50,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:53:50,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:53:50,227 INFO L87 Difference]: Start difference. First operand 269 states and 329 transitions. Second operand 17 states. [2020-10-27 14:53:51,162 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-27 14:53:51,523 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-27 14:53:52,353 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-27 14:53:52,534 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-10-27 14:53:53,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:53,365 INFO L93 Difference]: Finished difference Result 484 states and 601 transitions. [2020-10-27 14:53:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:53:53,366 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 60 [2020-10-27 14:53:53,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:53,370 INFO L225 Difference]: With dead ends: 484 [2020-10-27 14:53:53,370 INFO L226 Difference]: Without dead ends: 452 [2020-10-27 14:53:53,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:53:53,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-10-27 14:53:53,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 328. [2020-10-27 14:53:53,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-27 14:53:53,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 404 transitions. [2020-10-27 14:53:53,467 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 404 transitions. Word has length 60 [2020-10-27 14:53:53,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:53,468 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 404 transitions. [2020-10-27 14:53:53,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:53:53,468 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 404 transitions. [2020-10-27 14:53:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 14:53:53,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:53,469 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:53,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:53:53,470 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:53,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:53,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1791997150, now seen corresponding path program 1 times [2020-10-27 14:53:53,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:53,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136816056] [2020-10-27 14:53:53,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:53,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:53,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:53,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:53,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:53,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:53,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 14:53:53,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:53:53,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-27 14:53:53,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:53,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:53:53,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:53:53,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:53:53,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:53,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:53,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:53,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:53,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:53,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:53,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:53:53,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:53,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:53,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:53,736 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:53,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:53,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:53:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:53,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:53,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:53,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:53,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:53,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:53:53,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:53,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:53,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:53,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:53,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:53,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:53:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:53,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:53,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:53,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:53,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:53,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:53:53,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:53,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:53,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:53:53,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:53,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:53,755 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:53:53,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136816056] [2020-10-27 14:53:53,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:53:53,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:53:53,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401682744] [2020-10-27 14:53:53,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:53:53,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:53,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:53:53,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:53:53,760 INFO L87 Difference]: Start difference. First operand 328 states and 404 transitions. Second operand 4 states. [2020-10-27 14:53:53,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:53:53,997 INFO L93 Difference]: Finished difference Result 463 states and 574 transitions. [2020-10-27 14:53:53,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:53:53,998 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-27 14:53:53,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:53:54,001 INFO L225 Difference]: With dead ends: 463 [2020-10-27 14:53:54,001 INFO L226 Difference]: Without dead ends: 211 [2020-10-27 14:53:54,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:53:54,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-10-27 14:53:54,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2020-10-27 14:53:54,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-27 14:53:54,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 253 transitions. [2020-10-27 14:53:54,088 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 253 transitions. Word has length 60 [2020-10-27 14:53:54,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:53:54,088 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 253 transitions. [2020-10-27 14:53:54,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:53:54,088 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 253 transitions. [2020-10-27 14:53:54,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 14:53:54,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:53:54,094 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:53:54,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:53:54,094 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:53:54,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:53:54,095 INFO L82 PathProgramCache]: Analyzing trace with hash -329891859, now seen corresponding path program 3 times [2020-10-27 14:53:54,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:53:54,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355019086] [2020-10-27 14:53:54,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:53:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:54,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:54,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:54,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:54,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:54,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:56,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:56,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:59,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:59,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 14:53:59,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 14:53:59,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:53:59,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:59,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:53:59,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 14:53:59,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 14:53:59,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:59,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:53:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:59,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:59,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:59,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:53:59,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:59,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:53:59,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:59,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:53:59,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:59,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:53:59,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:59,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:53:59,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:59,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:59,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:59,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:59,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:59,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:53:59,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:59,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:53:59,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:59,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 14:53:59,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:59,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-27 14:53:59,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:59,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:59,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:59,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:59,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:59,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 14:53:59,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:59,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:53:59,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:59,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:53:59,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:59,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-27 14:53:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:59,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:59,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:59,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:59,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:59,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:59,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:59,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:53:59,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:59,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:53:59,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:59,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-10-27 14:53:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:53:59,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:53:59,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:53:59,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:53:59,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:53:59,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:53:59,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:53:59,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:53:59,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:53:59,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:53:59,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:53:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 14:53:59,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355019086] [2020-10-27 14:53:59,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:53:59,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:53:59,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649035587] [2020-10-27 14:53:59,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:53:59,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:53:59,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:53:59,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:53:59,653 INFO L87 Difference]: Start difference. First operand 211 states and 253 transitions. Second operand 13 states. [2020-10-27 14:54:01,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:01,208 INFO L93 Difference]: Finished difference Result 295 states and 351 transitions. [2020-10-27 14:54:01,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:54:01,209 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 66 [2020-10-27 14:54:01,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:01,210 INFO L225 Difference]: With dead ends: 295 [2020-10-27 14:54:01,210 INFO L226 Difference]: Without dead ends: 224 [2020-10-27 14:54:01,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:54:01,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-27 14:54:01,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 202. [2020-10-27 14:54:01,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-27 14:54:01,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 242 transitions. [2020-10-27 14:54:01,254 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 242 transitions. Word has length 66 [2020-10-27 14:54:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:01,254 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 242 transitions. [2020-10-27 14:54:01,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:54:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 242 transitions. [2020-10-27 14:54:01,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 14:54:01,255 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:01,256 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:01,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:54:01,256 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:01,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:01,256 INFO L82 PathProgramCache]: Analyzing trace with hash 2068278553, now seen corresponding path program 4 times [2020-10-27 14:54:01,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:01,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59571185] [2020-10-27 14:54:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:01,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:01,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:01,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:02,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:02,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:02,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:02,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:03,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:03,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:05,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:05,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:06,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:06,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:06,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 14:54:06,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 14:54:06,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:54:06,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:06,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:54:06,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:54:06,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 14:54:06,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:06,839 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-27 14:54:07,349 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2020-10-27 14:54:07,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:07,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:07,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:07,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:07,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:07,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:54:07,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:07,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:07,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:07,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:07,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:07,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:54:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:07,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:07,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:07,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:07,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:07,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:07,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:07,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:07,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:07,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:07,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:07,916 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:54:07,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59571185] [2020-10-27 14:54:07,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:07,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:54:07,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368224485] [2020-10-27 14:54:07,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:54:07,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:07,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:54:07,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:54:07,917 INFO L87 Difference]: Start difference. First operand 202 states and 242 transitions. Second operand 18 states. [2020-10-27 14:54:08,938 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-27 14:54:09,216 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-27 14:54:09,997 WARN L193 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-10-27 14:54:10,626 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-10-27 14:54:10,907 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-27 14:54:11,122 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-27 14:54:11,456 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-27 14:54:11,698 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2020-10-27 14:54:12,169 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-27 14:54:12,443 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-10-27 14:54:13,118 WARN L193 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2020-10-27 14:54:13,293 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2020-10-27 14:54:13,685 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-10-27 14:54:14,128 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2020-10-27 14:54:14,557 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-27 14:54:14,889 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 58 [2020-10-27 14:54:15,124 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-10-27 14:54:15,659 WARN L193 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-27 14:54:15,867 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2020-10-27 14:54:16,088 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2020-10-27 14:54:16,688 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-27 14:54:16,886 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-27 14:54:17,304 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-10-27 14:54:17,739 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-27 14:54:18,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:18,142 INFO L93 Difference]: Finished difference Result 465 states and 581 transitions. [2020-10-27 14:54:18,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 14:54:18,143 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 63 [2020-10-27 14:54:18,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:18,145 INFO L225 Difference]: With dead ends: 465 [2020-10-27 14:54:18,146 INFO L226 Difference]: Without dead ends: 421 [2020-10-27 14:54:18,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 10 SyntacticMatches, 12 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=489, Invalid=2817, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 14:54:18,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-27 14:54:18,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 257. [2020-10-27 14:54:18,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-27 14:54:18,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 316 transitions. [2020-10-27 14:54:18,217 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 316 transitions. Word has length 63 [2020-10-27 14:54:18,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:18,217 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 316 transitions. [2020-10-27 14:54:18,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:54:18,217 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 316 transitions. [2020-10-27 14:54:18,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:54:18,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:18,218 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:18,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:54:18,219 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:18,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:18,219 INFO L82 PathProgramCache]: Analyzing trace with hash 733034726, now seen corresponding path program 1 times [2020-10-27 14:54:18,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:18,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103968736] [2020-10-27 14:54:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:18,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:18,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:18,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:18,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:18,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:54:18,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:54:18,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 90 [2020-10-27 14:54:18,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:18,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:54:18,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:54:18,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:54:18,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:18,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:18,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:18,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:18,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:18,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:18,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:18,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:18,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:18,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:18,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:18,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:18,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:54:18,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:18,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:18,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:18,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:18,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:18,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:18,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:18,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:18,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:18,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:18,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:18,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:54:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:18,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:18,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:18,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:18,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:18,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:54:18,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:18,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:18,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:54:18,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:18,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:18,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-27 14:54:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:18,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:18,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:18,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:18,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:18,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:54:18,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:18,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:18,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:54:18,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:18,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 14:54:18,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103968736] [2020-10-27 14:54:18,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:54:18,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:54:18,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334973932] [2020-10-27 14:54:18,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:54:18,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:18,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:54:18,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:54:18,396 INFO L87 Difference]: Start difference. First operand 257 states and 316 transitions. Second operand 4 states. [2020-10-27 14:54:18,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:18,639 INFO L93 Difference]: Finished difference Result 333 states and 410 transitions. [2020-10-27 14:54:18,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:54:18,640 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-27 14:54:18,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:18,642 INFO L225 Difference]: With dead ends: 333 [2020-10-27 14:54:18,642 INFO L226 Difference]: Without dead ends: 269 [2020-10-27 14:54:18,643 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 [2020-10-27 14:54:18,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-27 14:54:18,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 257. [2020-10-27 14:54:18,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-27 14:54:18,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 307 transitions. [2020-10-27 14:54:18,710 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 307 transitions. Word has length 69 [2020-10-27 14:54:18,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:18,711 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 307 transitions. [2020-10-27 14:54:18,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:54:18,711 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 307 transitions. [2020-10-27 14:54:18,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 14:54:18,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:18,712 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:18,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:54:18,713 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:18,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:18,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1533580826, now seen corresponding path program 2 times [2020-10-27 14:54:18,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:18,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529278456] [2020-10-27 14:54:18,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:18,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:18,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:18,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:18,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 14:54:18,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:54:18,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-27 14:54:18,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:18,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:54:18,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:54:18,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 14:54:18,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:18,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:18,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:18,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:18,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:18,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:18,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:18,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:18,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:18,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:18,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:18,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:18,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:54:18,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:18,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:18,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:18,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:18,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:18,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:18,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:18,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:18,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:18,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:18,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:18,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:54:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:18,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:18,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:18,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:18,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:18,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:54:18,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:18,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:18,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:54:18,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:18,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:18,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-27 14:54:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:18,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:18,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:18,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:18,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:18,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-27 14:54:18,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:18,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:18,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-27 14:54:18,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:18,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:18,859 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-27 14:54:18,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529278456] [2020-10-27 14:54:18,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:54:18,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:54:18,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623037294] [2020-10-27 14:54:18,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:54:18,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:18,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:54:18,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:54:18,860 INFO L87 Difference]: Start difference. First operand 257 states and 307 transitions. Second operand 4 states. [2020-10-27 14:54:19,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:19,013 INFO L93 Difference]: Finished difference Result 288 states and 341 transitions. [2020-10-27 14:54:19,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:54:19,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-27 14:54:19,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:19,017 INFO L225 Difference]: With dead ends: 288 [2020-10-27 14:54:19,017 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 14:54:19,018 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 [2020-10-27 14:54:19,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 14:54:19,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-10-27 14:54:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-27 14:54:19,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 192 transitions. [2020-10-27 14:54:19,060 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 192 transitions. Word has length 69 [2020-10-27 14:54:19,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:19,060 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 192 transitions. [2020-10-27 14:54:19,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:54:19,061 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 192 transitions. [2020-10-27 14:54:19,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 14:54:19,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:19,062 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1] [2020-10-27 14:54:19,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:54:19,063 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:19,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:19,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1174617209, now seen corresponding path program 1 times [2020-10-27 14:54:19,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:19,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469593572] [2020-10-27 14:54:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:19,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:20,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:20,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:24,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:24,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 14:54:24,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:54:24,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:54:24,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:24,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:54:24,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:54:24,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 14:54:24,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:24,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:24,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:24,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:24,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:24,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:24,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:24,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:24,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:24,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:24,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:24,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:24,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:54:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:24,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:24,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:24,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:24,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:24,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:24,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:24,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:24,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:24,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:24,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:24,386 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 14:54:24,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469593572] [2020-10-27 14:54:24,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:24,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:54:24,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795418764] [2020-10-27 14:54:24,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:54:24,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:24,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:54:24,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:54:24,388 INFO L87 Difference]: Start difference. First operand 169 states and 192 transitions. Second operand 12 states. [2020-10-27 14:54:25,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:25,534 INFO L93 Difference]: Finished difference Result 358 states and 420 transitions. [2020-10-27 14:54:25,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:54:25,535 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-10-27 14:54:25,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:25,537 INFO L225 Difference]: With dead ends: 358 [2020-10-27 14:54:25,537 INFO L226 Difference]: Without dead ends: 260 [2020-10-27 14:54:25,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:54:25,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-27 14:54:25,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 217. [2020-10-27 14:54:25,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-27 14:54:25,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 248 transitions. [2020-10-27 14:54:25,606 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 248 transitions. Word has length 71 [2020-10-27 14:54:25,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:25,607 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 248 transitions. [2020-10-27 14:54:25,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:54:25,607 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 248 transitions. [2020-10-27 14:54:25,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 14:54:25,608 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:25,608 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:25,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:54:25,608 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:25,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:25,609 INFO L82 PathProgramCache]: Analyzing trace with hash -395678831, now seen corresponding path program 2 times [2020-10-27 14:54:25,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:25,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459615895] [2020-10-27 14:54:25,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:25,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:25,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:26,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:26,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:26,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:27,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:27,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:27,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:28,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:29,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:29,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:29,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:29,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:30,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:30,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:30,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 14:54:30,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:54:30,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 14:54:30,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:30,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:54:30,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-27 14:54:30,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 14:54:30,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:31,489 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 50 [2020-10-27 14:54:31,675 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 30 [2020-10-27 14:54:31,830 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 29 [2020-10-27 14:54:32,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:32,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:32,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:32,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:32,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:32,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:54:32,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:32,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:32,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:32,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:32,661 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:32,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:54:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:32,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:32,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:32,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:32,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:32,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:32,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:32,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:32,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:32,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:32,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:32,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 14:54:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:32,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:32,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:32,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:32,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:32,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:32,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:32,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:54:32,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:54:32,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 11 proven. 24 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 14:54:32,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459615895] [2020-10-27 14:54:32,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:32,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:54:32,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558259816] [2020-10-27 14:54:32,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:54:32,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:32,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:54:32,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:54:32,703 INFO L87 Difference]: Start difference. First operand 217 states and 248 transitions. Second operand 21 states. [2020-10-27 14:54:32,877 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 45 [2020-10-27 14:54:34,039 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 46 [2020-10-27 14:54:34,340 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 46 [2020-10-27 14:54:34,841 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-10-27 14:54:35,476 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 50 [2020-10-27 14:54:36,235 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2020-10-27 14:54:36,565 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 40 [2020-10-27 14:54:36,854 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2020-10-27 14:54:37,149 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2020-10-27 14:54:37,712 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 40 [2020-10-27 14:54:38,001 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 41 [2020-10-27 14:54:38,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:38,451 INFO L93 Difference]: Finished difference Result 280 states and 322 transitions. [2020-10-27 14:54:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:54:38,454 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 72 [2020-10-27 14:54:38,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:38,455 INFO L225 Difference]: With dead ends: 280 [2020-10-27 14:54:38,455 INFO L226 Difference]: Without dead ends: 253 [2020-10-27 14:54:38,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 7 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 14:54:38,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-27 14:54:38,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 180. [2020-10-27 14:54:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-27 14:54:38,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 204 transitions. [2020-10-27 14:54:38,506 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 204 transitions. Word has length 72 [2020-10-27 14:54:38,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:38,506 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 204 transitions. [2020-10-27 14:54:38,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:54:38,507 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 204 transitions. [2020-10-27 14:54:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 14:54:38,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:38,508 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:38,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:54:38,508 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:38,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:38,509 INFO L82 PathProgramCache]: Analyzing trace with hash -2085881246, now seen corresponding path program 3 times [2020-10-27 14:54:38,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:38,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003339184] [2020-10-27 14:54:38,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:38,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:38,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:39,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:39,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:39,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:39,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:41,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:41,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:41,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:43,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:43,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 14:54:43,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:54:43,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:54:43,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:43,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:54:43,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 14:54:43,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 14:54:43,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:44,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:44,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:44,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:44,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:44,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:44,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:44,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:54:44,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:44,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:44,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:44,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:44,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:44,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:54:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:44,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:44,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:44,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:44,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:44,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:44,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:44,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:44,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:44,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:44,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:44,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:54:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:44,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:44,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:44,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:44,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:44,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:44,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:44,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:54:44,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:44,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:54:44,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:44,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-27 14:54:44,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:44,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:44,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:44,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:44,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:44,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:44,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:44,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:54:44,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:44,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:54:44,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:44,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-27 14:54:44,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:44,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:44,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:44,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:44,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:44,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:54:44,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:44,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:54:44,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:44,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:54:44,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 27 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-10-27 14:54:44,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003339184] [2020-10-27 14:54:44,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:44,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:54:44,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442667055] [2020-10-27 14:54:44,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:54:44,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:44,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:54:44,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:54:44,669 INFO L87 Difference]: Start difference. First operand 180 states and 204 transitions. Second operand 17 states. [2020-10-27 14:54:45,087 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-27 14:54:45,533 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-10-27 14:54:45,972 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-27 14:54:46,194 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-10-27 14:54:46,518 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-27 14:54:46,744 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-27 14:54:46,939 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-27 14:54:47,355 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-27 14:54:47,557 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-27 14:54:48,077 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-27 14:54:48,275 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-27 14:54:48,488 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2020-10-27 14:54:48,682 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-27 14:54:49,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:54:49,655 INFO L93 Difference]: Finished difference Result 235 states and 270 transitions. [2020-10-27 14:54:49,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:54:49,657 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 78 [2020-10-27 14:54:49,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:54:49,659 INFO L225 Difference]: With dead ends: 235 [2020-10-27 14:54:49,659 INFO L226 Difference]: Without dead ends: 218 [2020-10-27 14:54:49,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=328, Invalid=1652, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 14:54:49,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-27 14:54:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 203. [2020-10-27 14:54:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-27 14:54:49,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 232 transitions. [2020-10-27 14:54:49,708 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 232 transitions. Word has length 78 [2020-10-27 14:54:49,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:54:49,709 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 232 transitions. [2020-10-27 14:54:49,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:54:49,709 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 232 transitions. [2020-10-27 14:54:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 14:54:49,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:54:49,710 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:54:49,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:54:49,710 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:54:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:54:49,710 INFO L82 PathProgramCache]: Analyzing trace with hash 310116994, now seen corresponding path program 2 times [2020-10-27 14:54:49,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:54:49,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315504844] [2020-10-27 14:54:49,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:54:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:49,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:51,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:52,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:52,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:53,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:53,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:54,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:54,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:54,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:54,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:54,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 14:54:54,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:54:54,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-27 14:54:54,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:54,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 14:54:54,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:54:54,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 14:54:54,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:55,577 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-27 14:54:55,993 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-27 14:54:56,549 WARN L193 SmtUtils]: Spent 458.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 61 [2020-10-27 14:54:56,754 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 31 [2020-10-27 14:54:57,065 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 33 [2020-10-27 14:54:58,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:54:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:58,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:58,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:58,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:54:58,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:58,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:58,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:58,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:58,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:58,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:58,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:58,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:54:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:54:58,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:54:58,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:54:58,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:54:58,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:54:58,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:54:58,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:54:58,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:54:58,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:54:58,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:54:58,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:54:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 18 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 14:54:58,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315504844] [2020-10-27 14:54:58,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:54:58,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:54:58,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645391506] [2020-10-27 14:54:58,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:54:58,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:54:58,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:54:58,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:54:58,567 INFO L87 Difference]: Start difference. First operand 203 states and 232 transitions. Second operand 23 states. [2020-10-27 14:54:59,773 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-27 14:55:00,066 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 59 [2020-10-27 14:55:00,375 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-27 14:55:00,732 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2020-10-27 14:55:01,179 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 62 [2020-10-27 14:55:01,531 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 69 [2020-10-27 14:55:02,084 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2020-10-27 14:55:02,569 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 67 [2020-10-27 14:55:02,833 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 60 [2020-10-27 14:55:03,337 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 59 [2020-10-27 14:55:03,823 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 68 [2020-10-27 14:55:04,044 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-27 14:55:04,602 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 77 [2020-10-27 14:55:05,082 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-27 14:55:05,254 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 49 [2020-10-27 14:55:05,698 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-27 14:55:05,917 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-27 14:55:06,265 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2020-10-27 14:55:06,992 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 64 [2020-10-27 14:55:07,457 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-27 14:55:08,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:08,275 INFO L93 Difference]: Finished difference Result 358 states and 421 transitions. [2020-10-27 14:55:08,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 14:55:08,278 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 75 [2020-10-27 14:55:08,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:08,280 INFO L225 Difference]: With dead ends: 358 [2020-10-27 14:55:08,280 INFO L226 Difference]: Without dead ends: 325 [2020-10-27 14:55:08,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 9 SyntacticMatches, 15 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=480, Invalid=3426, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 14:55:08,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-27 14:55:08,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 232. [2020-10-27 14:55:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-27 14:55:08,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 266 transitions. [2020-10-27 14:55:08,339 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 266 transitions. Word has length 75 [2020-10-27 14:55:08,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:08,339 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 266 transitions. [2020-10-27 14:55:08,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:55:08,339 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 266 transitions. [2020-10-27 14:55:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-27 14:55:08,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:08,340 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:08,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:55:08,341 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:08,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:08,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1198296478, now seen corresponding path program 4 times [2020-10-27 14:55:08,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:08,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461838043] [2020-10-27 14:55:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:08,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:08,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:08,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:08,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:08,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:08,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:08,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:10,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:11,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:11,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:12,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:12,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:12,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:13,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:13,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 14:55:13,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:55:13,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:55:13,370 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:13,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:55:13,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-27 14:55:13,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 14:55:13,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:13,696 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-10-27 14:55:14,207 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 31 [2020-10-27 14:55:14,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:14,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:14,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:14,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:14,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:14,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:55:14,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:14,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:14,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:14,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:14,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:14,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:55:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:14,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:14,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:14,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:14,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:14,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:55:14,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:14,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:14,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:14,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:14,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:14,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-27 14:55:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:14,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:14,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:14,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:14,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:14,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:55:14,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:14,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:55:14,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:14,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:55:14,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:14,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-27 14:55:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:14,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:14,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:14,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:14,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:14,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:55:14,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:14,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:55:14,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:14,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:55:14,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:14,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-27 14:55:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:14,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:14,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:14,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:14,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:14,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:55:14,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:14,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:55:14,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:14,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:55:14,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:14,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-10-27 14:55:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:14,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:14,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:14,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:14,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:14,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:55:14,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:14,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:55:14,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:14,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:55:14,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:14,537 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-10-27 14:55:14,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461838043] [2020-10-27 14:55:14,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:14,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:55:14,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113765362] [2020-10-27 14:55:14,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:55:14,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:14,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:55:14,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:55:14,538 INFO L87 Difference]: Start difference. First operand 232 states and 266 transitions. Second operand 18 states. [2020-10-27 14:55:15,004 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 38 [2020-10-27 14:55:15,891 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2020-10-27 14:55:17,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:17,448 INFO L93 Difference]: Finished difference Result 269 states and 310 transitions. [2020-10-27 14:55:17,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:55:17,450 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2020-10-27 14:55:17,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:17,452 INFO L225 Difference]: With dead ends: 269 [2020-10-27 14:55:17,453 INFO L226 Difference]: Without dead ends: 252 [2020-10-27 14:55:17,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=193, Invalid=1213, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:55:17,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-27 14:55:17,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 237. [2020-10-27 14:55:17,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-27 14:55:17,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 272 transitions. [2020-10-27 14:55:17,522 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 272 transitions. Word has length 87 [2020-10-27 14:55:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:17,523 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 272 transitions. [2020-10-27 14:55:17,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:55:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 272 transitions. [2020-10-27 14:55:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-27 14:55:17,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:17,524 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:17,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:55:17,525 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:17,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:17,525 INFO L82 PathProgramCache]: Analyzing trace with hash -876276298, now seen corresponding path program 3 times [2020-10-27 14:55:17,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:17,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788557899] [2020-10-27 14:55:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:17,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:17,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:17,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:20,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:22,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:22,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-27 14:55:22,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 14:55:22,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 14:55:22,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:22,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:55:22,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 14:55:22,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 14:55:22,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:22,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:22,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:22,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:22,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:22,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:22,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:22,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:22,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:22,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:22,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:22,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:22,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:55:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:22,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:22,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:22,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:22,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:22,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:22,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:22,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:22,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:22,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:22,955 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 45 proven. 28 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-27 14:55:22,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788557899] [2020-10-27 14:55:22,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:22,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:55:22,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433202407] [2020-10-27 14:55:22,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:55:22,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:22,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:55:22,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:55:22,956 INFO L87 Difference]: Start difference. First operand 237 states and 272 transitions. Second operand 14 states. [2020-10-27 14:55:25,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:25,545 INFO L93 Difference]: Finished difference Result 472 states and 563 transitions. [2020-10-27 14:55:25,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:55:25,547 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 83 [2020-10-27 14:55:25,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:25,550 INFO L225 Difference]: With dead ends: 472 [2020-10-27 14:55:25,550 INFO L226 Difference]: Without dead ends: 346 [2020-10-27 14:55:25,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:55:25,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-27 14:55:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 289. [2020-10-27 14:55:25,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-27 14:55:25,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 333 transitions. [2020-10-27 14:55:25,637 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 333 transitions. Word has length 83 [2020-10-27 14:55:25,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:25,638 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 333 transitions. [2020-10-27 14:55:25,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:55:25,638 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 333 transitions. [2020-10-27 14:55:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 14:55:25,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:25,639 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:55:25,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:55:25,639 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:25,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:25,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1468363198, now seen corresponding path program 5 times [2020-10-27 14:55:25,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:25,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667853287] [2020-10-27 14:55:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:25,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:26,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:26,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:27,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:27,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:27,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:27,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:27,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:28,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:30,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:30,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:30,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 14:55:30,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:55:30,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:55:30,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:30,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:55:30,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 14:55:30,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:55:30,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:31,331 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2020-10-27 14:55:31,516 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 37 [2020-10-27 14:55:31,780 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 28 [2020-10-27 14:55:32,131 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 31 [2020-10-27 14:55:32,461 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 27 [2020-10-27 14:55:33,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:33,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:33,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:33,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:33,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:33,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:55:33,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:33,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:33,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:33,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:33,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:33,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:55:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:33,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:33,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:33,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:33,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:33,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:55:33,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:33,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:33,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:33,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:33,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:33,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-10-27 14:55:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:33,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:33,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:33,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:33,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:33,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:33,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:33,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:55:33,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:33,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:55:33,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-27 14:55:33,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667853287] [2020-10-27 14:55:33,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:33,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:55:33,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778346178] [2020-10-27 14:55:33,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:55:33,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:33,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:55:33,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:55:33,706 INFO L87 Difference]: Start difference. First operand 289 states and 333 transitions. Second operand 22 states. [2020-10-27 14:55:36,230 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-27 14:55:36,648 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2020-10-27 14:55:36,928 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-27 14:55:37,160 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-27 14:55:37,403 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-27 14:55:37,627 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-10-27 14:55:37,840 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-27 14:55:38,031 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 28 [2020-10-27 14:55:38,279 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2020-10-27 14:55:38,467 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-27 14:55:38,646 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-10-27 14:55:38,872 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-10-27 14:55:39,103 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2020-10-27 14:55:39,380 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-10-27 14:55:39,787 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2020-10-27 14:55:39,985 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2020-10-27 14:55:41,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:55:41,073 INFO L93 Difference]: Finished difference Result 374 states and 436 transitions. [2020-10-27 14:55:41,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 14:55:41,074 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 84 [2020-10-27 14:55:41,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:55:41,076 INFO L225 Difference]: With dead ends: 374 [2020-10-27 14:55:41,076 INFO L226 Difference]: Without dead ends: 347 [2020-10-27 14:55:41,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 8 SyntacticMatches, 13 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=450, Invalid=2856, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 14:55:41,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-27 14:55:41,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 288. [2020-10-27 14:55:41,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-27 14:55:41,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 330 transitions. [2020-10-27 14:55:41,148 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 330 transitions. Word has length 84 [2020-10-27 14:55:41,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:55:41,148 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 330 transitions. [2020-10-27 14:55:41,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:55:41,149 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 330 transitions. [2020-10-27 14:55:41,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 14:55:41,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:55:41,150 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2020-10-27 14:55:41,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:55:41,150 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:55:41,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:55:41,151 INFO L82 PathProgramCache]: Analyzing trace with hash 552989267, now seen corresponding path program 6 times [2020-10-27 14:55:41,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:55:41,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400578571] [2020-10-27 14:55:41,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:55:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:41,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:41,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:41,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:42,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:42,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:42,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:43,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:44,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:46,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:46,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 14:55:46,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 14:55:46,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 14:55:46,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:46,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:55:46,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-27 14:55:46,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 14:55:46,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:46,493 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-27 14:55:46,663 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2020-10-27 14:55:46,970 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2020-10-27 14:55:47,388 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 26 [2020-10-27 14:55:47,637 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 26 [2020-10-27 14:55:47,877 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 29 [2020-10-27 14:55:48,048 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 27 [2020-10-27 14:55:48,203 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 29 [2020-10-27 14:55:48,500 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2020-10-27 14:55:48,820 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 35 [2020-10-27 14:55:49,211 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-10-27 14:55:49,558 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-27 14:55:49,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:55:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:49,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:49,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:49,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:55:49,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:49,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:49,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:49,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:49,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:49,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:49,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:49,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 14:55:49,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:49,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:49,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:49,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:49,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:49,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:55:49,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:49,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:55:49,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:49,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:55:50,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:50,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 14:55:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:50,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:50,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:50,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:50,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:50,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:50,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:50,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:55:50,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:50,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:55:50,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:50,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-10-27 14:55:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:50,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:50,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:50,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:50,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:50,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:50,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:50,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:55:50,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:50,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:55:50,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:50,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-10-27 14:55:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:55:50,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:55:50,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:55:50,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-27 14:55:50,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:55:50,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:55:50,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:55:50,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:55:50,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:55:50,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:55:50,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:55:50,062 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 25 proven. 48 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 14:55:50,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400578571] [2020-10-27 14:55:50,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:55:50,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:55:50,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674924442] [2020-10-27 14:55:50,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:55:50,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:55:50,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:55:50,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:55:50,064 INFO L87 Difference]: Start difference. First operand 288 states and 330 transitions. Second operand 24 states.