/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:37:30,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:37:30,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:37:30,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:37:30,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:37:30,800 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:37:30,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:37:30,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:37:30,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:37:30,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:37:30,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:37:30,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:37:30,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:37:30,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:37:30,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:37:30,813 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:37:30,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:37:30,814 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:37:30,816 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:37:30,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:37:30,819 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:37:30,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:37:30,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:37:30,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:37:30,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:37:30,825 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:37:30,825 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:37:30,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:37:30,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:37:30,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:37:30,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:37:30,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:37:30,831 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:37:30,832 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:37:30,833 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:37:30,834 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:37:30,834 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:37:30,835 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:37:30,835 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:37:30,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:37:30,837 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:37:30,838 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 [2020-09-24 21:37:30,864 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:37:30,864 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:37:30,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:37:30,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:37:30,866 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:37:30,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:37:30,867 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:37:30,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:37:30,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:37:30,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:37:30,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:37:30,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:37:30,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:37:30,868 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:37:30,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:37:30,869 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:37:30,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:37:30,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:37:30,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:37:30,870 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:37:30,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:37:30,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:37:30,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:37:30,871 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:37:30,871 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:37:30,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:37:30,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:37:30,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:37:30,872 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:37:30,872 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement 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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:37:31,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:37:31,383 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:37:31,388 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:37:31,393 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:37:31,393 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:37:31,395 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test25-2.c [2020-09-24 21:37:31,491 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/123203a49/754a6b1ea94c472793e374600892c2c0/FLAGa14ff7e38 [2020-09-24 21:37:32,059 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:37:32,060 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test25-2.c [2020-09-24 21:37:32,069 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/123203a49/754a6b1ea94c472793e374600892c2c0/FLAGa14ff7e38 [2020-09-24 21:37:32,391 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/123203a49/754a6b1ea94c472793e374600892c2c0 [2020-09-24 21:37:32,404 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:37:32,410 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:37:32,411 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:37:32,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:37:32,416 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:37:32,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1848833b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32, skipping insertion in model container [2020-09-24 21:37:32,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:37:32,463 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:37:32,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:37:32,706 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:37:32,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:37:32,749 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:37:32,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32 WrapperNode [2020-09-24 21:37:32,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:37:32,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:37:32,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:37:32,751 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:37:32,856 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,868 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,868 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,885 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (1/1) ... [2020-09-24 21:37:32,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:37:32,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:37:32,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:37:32,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:37:32,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (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 [2020-09-24 21:37:32,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:37:32,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:37:32,979 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-24 21:37:32,979 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:37:32,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:37:32,979 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:37:32,979 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-24 21:37:32,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-24 21:37:32,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 21:37:32,980 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:37:32,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 21:37:32,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 21:37:32,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-24 21:37:32,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 21:37:32,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:37:32,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:37:33,392 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:37:33,392 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-24 21:37:33,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:37:33 BoogieIcfgContainer [2020-09-24 21:37:33,399 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:37:33,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:37:33,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:37:33,405 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:37:33,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:37:32" (1/3) ... [2020-09-24 21:37:33,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a19ca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:37:33, skipping insertion in model container [2020-09-24 21:37:33,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:37:32" (2/3) ... [2020-09-24 21:37:33,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a19ca3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:37:33, skipping insertion in model container [2020-09-24 21:37:33,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:37:33" (3/3) ... [2020-09-24 21:37:33,411 INFO L109 eAbstractionObserver]: Analyzing ICFG test25-2.c [2020-09-24 21:37:33,424 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:37:33,435 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:37:33,459 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:37:33,491 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:37:33,491 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:37:33,491 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:37:33,491 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:37:33,491 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:37:33,492 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:37:33,492 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:37:33,492 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:37:33,518 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states. [2020-09-24 21:37:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-24 21:37:33,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:33,529 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, 1, 1, 1, 1, 1] [2020-09-24 21:37:33,529 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:33,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:33,537 INFO L82 PathProgramCache]: Analyzing trace with hash 144198137, now seen corresponding path program 1 times [2020-09-24 21:37:33,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:33,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341657647] [2020-09-24 21:37:33,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:33,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:33,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:34,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:34,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 21:37:34,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:34,025 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-09-24 21:37:34,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:34,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:34,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-24 21:37:34,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:34,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:37:34,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:34,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:34,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:34,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:34,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:34,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 21:37:34,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:34,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:34,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:34,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:34,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:34,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-09-24 21:37:34,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:34,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:34,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:34,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:37:34,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:34,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 21:37:34,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:34,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:34,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:37:34,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:34,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:34,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:34,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341657647] [2020-09-24 21:37:34,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:37:34,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 21:37:34,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091874954] [2020-09-24 21:37:34,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 21:37:34,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:34,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 21:37:34,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:37:34,249 INFO L87 Difference]: Start difference. First operand 77 states. Second operand 3 states. [2020-09-24 21:37:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:34,427 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2020-09-24 21:37:34,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 21:37:34,429 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-09-24 21:37:34,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:34,444 INFO L225 Difference]: With dead ends: 124 [2020-09-24 21:37:34,444 INFO L226 Difference]: Without dead ends: 60 [2020-09-24 21:37:34,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:37:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-24 21:37:34,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-09-24 21:37:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 21:37:34,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-24 21:37:34,503 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 44 [2020-09-24 21:37:34,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:34,504 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-24 21:37:34,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 21:37:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-24 21:37:34,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 21:37:34,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:34,506 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:34,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:37:34,507 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:34,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:34,508 INFO L82 PathProgramCache]: Analyzing trace with hash 608042528, now seen corresponding path program 1 times [2020-09-24 21:37:34,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:34,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761563315] [2020-09-24 21:37:34,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:34,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:34,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:35,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:35,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 21:37:35,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:35,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 840 [2020-09-24 21:37:35,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:35,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:37:35,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:37:35,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 21:37:35,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:35,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:35,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:35,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:35,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:35,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:35,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:37:35,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:35,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:35,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:35,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:35,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:35,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-09-24 21:37:35,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:35,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:35,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:35,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:37:35,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:35,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:37:35,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:35,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:35,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:37:35,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:35,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:35,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761563315] [2020-09-24 21:37:35,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:37:35,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 21:37:35,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281901717] [2020-09-24 21:37:35,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 21:37:35,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:35,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 21:37:35,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 21:37:35,453 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 4 states. [2020-09-24 21:37:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:35,596 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-09-24 21:37:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 21:37:35,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 46 [2020-09-24 21:37:35,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:35,599 INFO L225 Difference]: With dead ends: 104 [2020-09-24 21:37:35,599 INFO L226 Difference]: Without dead ends: 69 [2020-09-24 21:37:35,600 INFO L675 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 [2020-09-24 21:37:35,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-24 21:37:35,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-09-24 21:37:35,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-24 21:37:35,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-09-24 21:37:35,610 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 46 [2020-09-24 21:37:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:35,610 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-09-24 21:37:35,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 21:37:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-09-24 21:37:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 21:37:35,613 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:35,613 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:35,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:37:35,613 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:35,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:35,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1644606330, now seen corresponding path program 1 times [2020-09-24 21:37:35,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:35,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706326370] [2020-09-24 21:37:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:35,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:35,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:37,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:37,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-24 21:37:37,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:37,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1459 [2020-09-24 21:37:37,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:37,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:37:37,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:37:37,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:37:37,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:37,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:37,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:37,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:37,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:37,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:37,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:37:37,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:37,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:37,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:37,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:37,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:37,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-24 21:37:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:37,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:37,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:37,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:37:37,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:37,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:37:37,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:37,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:37,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:37:37,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:37,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:37,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706326370] [2020-09-24 21:37:37,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:37,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:37:37,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34607176] [2020-09-24 21:37:37,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:37:37,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:37,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:37:37,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:37:37,193 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 6 states. [2020-09-24 21:37:37,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:37,364 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2020-09-24 21:37:37,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:37:37,364 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-09-24 21:37:37,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:37,366 INFO L225 Difference]: With dead ends: 114 [2020-09-24 21:37:37,366 INFO L226 Difference]: Without dead ends: 79 [2020-09-24 21:37:37,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:37:37,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-24 21:37:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2020-09-24 21:37:37,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-24 21:37:37,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-09-24 21:37:37,376 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 56 [2020-09-24 21:37:37,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:37,377 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-09-24 21:37:37,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:37:37,377 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-09-24 21:37:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-24 21:37:37,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:37,378 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:37,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:37:37,379 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:37,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:37,380 INFO L82 PathProgramCache]: Analyzing trace with hash 278397012, now seen corresponding path program 2 times [2020-09-24 21:37:37,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:37,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265755475] [2020-09-24 21:37:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:37,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:37,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:39,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:39,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 21:37:39,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:39,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2265 [2020-09-24 21:37:39,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:39,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:37:39,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:37:39,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 21:37:39,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:39,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:39,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:39,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:39,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:39,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:39,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-24 21:37:39,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:39,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:39,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:39,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:39,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:39,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-09-24 21:37:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:39,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:39,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:39,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:37:39,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:39,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:37:39,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:39,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:39,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:37:39,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:39,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:39,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:39,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265755475] [2020-09-24 21:37:39,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:39,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 21:37:39,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6413291] [2020-09-24 21:37:39,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:37:39,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:39,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:37:39,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:37:39,852 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 8 states. [2020-09-24 21:37:40,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:40,144 INFO L93 Difference]: Finished difference Result 124 states and 126 transitions. [2020-09-24 21:37:40,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:37:40,145 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-09-24 21:37:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:40,147 INFO L225 Difference]: With dead ends: 124 [2020-09-24 21:37:40,148 INFO L226 Difference]: Without dead ends: 89 [2020-09-24 21:37:40,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:37:40,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-24 21:37:40,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2020-09-24 21:37:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-24 21:37:40,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-09-24 21:37:40,165 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 66 [2020-09-24 21:37:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:40,167 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-09-24 21:37:40,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:37:40,167 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-09-24 21:37:40,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 21:37:40,170 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:40,170 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:40,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:37:40,172 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:40,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:40,175 INFO L82 PathProgramCache]: Analyzing trace with hash 767198382, now seen corresponding path program 3 times [2020-09-24 21:37:40,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:40,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125033703] [2020-09-24 21:37:40,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:40,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:40,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:43,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:43,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 21:37:43,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:43,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3544 [2020-09-24 21:37:43,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:43,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:37:43,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:37:43,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 21:37:43,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:43,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:43,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:43,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:43,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:43,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:43,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:37:43,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:43,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:43,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:43,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:43,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:43,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-09-24 21:37:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:43,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:43,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:43,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:37:43,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:43,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:37:43,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:43,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:43,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:37:43,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:43,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:43,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125033703] [2020-09-24 21:37:43,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:43,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 21:37:43,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057688892] [2020-09-24 21:37:43,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 21:37:43,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:43,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 21:37:43,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-24 21:37:43,963 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 10 states. [2020-09-24 21:37:44,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:44,264 INFO L93 Difference]: Finished difference Result 134 states and 136 transitions. [2020-09-24 21:37:44,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 21:37:44,265 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 76 [2020-09-24 21:37:44,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:44,269 INFO L225 Difference]: With dead ends: 134 [2020-09-24 21:37:44,269 INFO L226 Difference]: Without dead ends: 99 [2020-09-24 21:37:44,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:37:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-24 21:37:44,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2020-09-24 21:37:44,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-24 21:37:44,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-09-24 21:37:44,286 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 76 [2020-09-24 21:37:44,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:44,289 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-09-24 21:37:44,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 21:37:44,289 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-09-24 21:37:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-24 21:37:44,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:44,291 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:44,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:37:44,292 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:44,294 INFO L82 PathProgramCache]: Analyzing trace with hash 216981640, now seen corresponding path program 4 times [2020-09-24 21:37:44,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:44,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964997936] [2020-09-24 21:37:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:44,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:44,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:48,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:48,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-09-24 21:37:48,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:48,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4431 [2020-09-24 21:37:48,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:48,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:37:48,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:37:48,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 21:37:48,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:48,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:48,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:48,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:48,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:48,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:48,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:37:48,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:48,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:48,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:48,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:48,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:48,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-09-24 21:37:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:48,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:48,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:48,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:37:48,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:48,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-09-24 21:37:48,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:48,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:48,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:37:48,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:48,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:37:48,983 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:48,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964997936] [2020-09-24 21:37:48,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:48,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 21:37:48,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472912242] [2020-09-24 21:37:48,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 21:37:48,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:48,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 21:37:48,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-24 21:37:48,986 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 12 states. [2020-09-24 21:37:49,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:49,275 INFO L93 Difference]: Finished difference Result 144 states and 146 transitions. [2020-09-24 21:37:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 21:37:49,276 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-09-24 21:37:49,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:49,277 INFO L225 Difference]: With dead ends: 144 [2020-09-24 21:37:49,277 INFO L226 Difference]: Without dead ends: 109 [2020-09-24 21:37:49,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:37:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-24 21:37:49,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 101. [2020-09-24 21:37:49,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-24 21:37:49,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2020-09-24 21:37:49,286 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 86 [2020-09-24 21:37:49,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:49,287 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2020-09-24 21:37:49,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 21:37:49,287 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2020-09-24 21:37:49,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-24 21:37:49,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:49,288 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:49,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:37:49,289 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:49,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:49,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1855081502, now seen corresponding path program 5 times [2020-09-24 21:37:49,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:49,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855614576] [2020-09-24 21:37:49,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:49,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:49,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:49,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:54,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:54,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-09-24 21:37:54,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:54,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-09-24 21:37:54,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:54,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:37:54,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:37:54,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 21:37:54,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:54,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:37:54,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:54,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:54,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:54,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:37:54,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:54,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:37:54,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:54,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:54,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:37:54,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:54,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:54,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-09-24 21:37:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:54,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:54,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:54,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:37:54,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:37:54,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-24 21:37:54,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:54,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:37:54,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:37:54,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:37:54,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:37:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:37:54,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855614576] [2020-09-24 21:37:54,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:37:54,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 21:37:54,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778250661] [2020-09-24 21:37:54,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 21:37:54,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:37:54,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 21:37:54,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-24 21:37:54,539 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand 14 states. [2020-09-24 21:37:54,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:37:54,850 INFO L93 Difference]: Finished difference Result 154 states and 156 transitions. [2020-09-24 21:37:54,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 21:37:54,851 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 96 [2020-09-24 21:37:54,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:37:54,852 INFO L225 Difference]: With dead ends: 154 [2020-09-24 21:37:54,853 INFO L226 Difference]: Without dead ends: 119 [2020-09-24 21:37:54,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-24 21:37:54,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-24 21:37:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2020-09-24 21:37:54,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-24 21:37:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2020-09-24 21:37:54,875 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 96 [2020-09-24 21:37:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:37:54,875 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2020-09-24 21:37:54,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 21:37:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2020-09-24 21:37:54,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-24 21:37:54,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:37:54,877 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:37:54,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:37:54,878 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:37:54,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:37:54,878 INFO L82 PathProgramCache]: Analyzing trace with hash -400056644, now seen corresponding path program 6 times [2020-09-24 21:37:54,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:37:54,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573666116] [2020-09-24 21:37:54,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:37:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:37:54,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:55,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:37:59,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:37:59,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-09-24 21:37:59,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:37:59,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-09-24 21:37:59,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:37:59,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:37:59,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:37:59,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 21:37:59,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:00,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:00,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:00,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:00,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:00,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:00,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:38:00,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:00,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:00,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:00,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:00,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:00,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-09-24 21:38:00,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:00,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:00,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:00,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:38:00,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:00,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:38:00,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:00,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:00,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:38:00,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:00,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:00,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573666116] [2020-09-24 21:38:00,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:00,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 21:38:00,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043581927] [2020-09-24 21:38:00,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 21:38:00,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:00,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 21:38:00,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-24 21:38:00,132 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 16 states. [2020-09-24 21:38:00,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:00,551 INFO L93 Difference]: Finished difference Result 164 states and 166 transitions. [2020-09-24 21:38:00,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 21:38:00,552 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 106 [2020-09-24 21:38:00,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:00,554 INFO L225 Difference]: With dead ends: 164 [2020-09-24 21:38:00,554 INFO L226 Difference]: Without dead ends: 129 [2020-09-24 21:38:00,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-24 21:38:00,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-24 21:38:00,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 121. [2020-09-24 21:38:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-09-24 21:38:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2020-09-24 21:38:00,562 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 106 [2020-09-24 21:38:00,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:00,563 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2020-09-24 21:38:00,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 21:38:00,563 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2020-09-24 21:38:00,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-24 21:38:00,564 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:00,564 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:00,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:38:00,564 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:00,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:00,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1044037354, now seen corresponding path program 7 times [2020-09-24 21:38:00,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:00,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585143149] [2020-09-24 21:38:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:00,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:00,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:05,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:05,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-09-24 21:38:05,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:38:05,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-09-24 21:38:05,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:05,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:38:05,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:38:05,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:38:05,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:05,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:05,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:05,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:05,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:05,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:05,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:38:05,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:05,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:05,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:05,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:05,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:38:05,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-09-24 21:38:05,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:05,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:05,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:05,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:38:05,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:05,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:38:05,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:05,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:05,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:38:05,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:05,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:05,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585143149] [2020-09-24 21:38:05,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:05,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 21:38:05,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426538185] [2020-09-24 21:38:05,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 21:38:05,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:05,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 21:38:05,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-24 21:38:05,939 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand 18 states. [2020-09-24 21:38:06,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:06,498 INFO L93 Difference]: Finished difference Result 174 states and 176 transitions. [2020-09-24 21:38:06,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 21:38:06,499 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 116 [2020-09-24 21:38:06,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:06,501 INFO L225 Difference]: With dead ends: 174 [2020-09-24 21:38:06,501 INFO L226 Difference]: Without dead ends: 139 [2020-09-24 21:38:06,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-24 21:38:06,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-24 21:38:06,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 131. [2020-09-24 21:38:06,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-09-24 21:38:06,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2020-09-24 21:38:06,517 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 116 [2020-09-24 21:38:06,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:06,518 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2020-09-24 21:38:06,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 21:38:06,518 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2020-09-24 21:38:06,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-24 21:38:06,519 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:06,519 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:06,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:38:06,523 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:06,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:06,524 INFO L82 PathProgramCache]: Analyzing trace with hash 212286192, now seen corresponding path program 8 times [2020-09-24 21:38:06,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:06,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975865354] [2020-09-24 21:38:06,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:06,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:06,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:11,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:11,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-09-24 21:38:11,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:38:11,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-24 21:38:11,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:11,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:38:11,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:38:11,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-24 21:38:11,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:11,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:11,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:11,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:11,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:11,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:11,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:38:11,814 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:11,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:11,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:11,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:11,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:38:11,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-09-24 21:38:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:11,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:11,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:11,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:38:11,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:11,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:38:11,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:11,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:11,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:38:11,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:11,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:11,845 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:11,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975865354] [2020-09-24 21:38:11,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:11,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 21:38:11,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015473423] [2020-09-24 21:38:11,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 21:38:11,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:11,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 21:38:11,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-24 21:38:11,849 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 20 states. [2020-09-24 21:38:12,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:12,471 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2020-09-24 21:38:12,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 21:38:12,471 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 126 [2020-09-24 21:38:12,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:12,472 INFO L225 Difference]: With dead ends: 184 [2020-09-24 21:38:12,473 INFO L226 Difference]: Without dead ends: 149 [2020-09-24 21:38:12,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 21:38:12,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-24 21:38:12,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 141. [2020-09-24 21:38:12,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-24 21:38:12,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-09-24 21:38:12,481 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 126 [2020-09-24 21:38:12,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:12,482 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-09-24 21:38:12,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 21:38:12,482 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-09-24 21:38:12,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-24 21:38:12,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:12,484 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:12,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 21:38:12,484 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:12,485 INFO L82 PathProgramCache]: Analyzing trace with hash 786836554, now seen corresponding path program 9 times [2020-09-24 21:38:12,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:12,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845932824] [2020-09-24 21:38:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:12,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:12,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:17,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:17,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-09-24 21:38:17,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:38:17,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-09-24 21:38:17,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:17,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:38:17,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:38:17,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-09-24 21:38:17,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:17,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:17,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:17,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:17,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:17,862 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:17,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:38:17,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:17,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:17,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:17,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:17,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:17,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-09-24 21:38:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:17,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:17,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:17,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:38:17,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:17,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-09-24 21:38:17,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:17,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:17,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:38:17,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:17,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:38:17,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845932824] [2020-09-24 21:38:17,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:38:17,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 21:38:17,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636194602] [2020-09-24 21:38:17,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 21:38:17,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:17,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 21:38:17,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-24 21:38:17,896 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 22 states. [2020-09-24 21:38:18,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:18,585 INFO L93 Difference]: Finished difference Result 186 states and 188 transitions. [2020-09-24 21:38:18,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-24 21:38:18,586 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 136 [2020-09-24 21:38:18,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:18,588 INFO L225 Difference]: With dead ends: 186 [2020-09-24 21:38:18,588 INFO L226 Difference]: Without dead ends: 151 [2020-09-24 21:38:18,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 21:38:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-24 21:38:18,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-09-24 21:38:18,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-09-24 21:38:18,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2020-09-24 21:38:18,602 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 136 [2020-09-24 21:38:18,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:18,602 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2020-09-24 21:38:18,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 21:38:18,603 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2020-09-24 21:38:18,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-24 21:38:18,604 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:18,604 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:18,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 21:38:18,605 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:18,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:18,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1068321500, now seen corresponding path program 10 times [2020-09-24 21:38:18,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:18,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288002346] [2020-09-24 21:38:18,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:18,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:19,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:19,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-09-24 21:38:19,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:19,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-09-24 21:38:19,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:19,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:38:19,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 124 [2020-09-24 21:38:19,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:38:19,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:19,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:38:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:19,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:19,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:19,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:38:19,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:19,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:38:19,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:19,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:19,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:38:19,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:19,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:19,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-09-24 21:38:19,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:19,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:19,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:38:19,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-09-24 21:38:19,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:38:19,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:38:19,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:38:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:38:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:38:19,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:38:19,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:38:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 460 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 460 trivial. 0 not checked. [2020-09-24 21:38:19,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288002346] [2020-09-24 21:38:19,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:38:19,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-24 21:38:19,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211885947] [2020-09-24 21:38:19,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:38:19,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:38:19,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:38:19,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:38:19,752 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 9 states. [2020-09-24 21:38:20,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:38:20,058 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2020-09-24 21:38:20,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 21:38:20,058 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 146 [2020-09-24 21:38:20,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:38:20,060 INFO L225 Difference]: With dead ends: 172 [2020-09-24 21:38:20,060 INFO L226 Difference]: Without dead ends: 156 [2020-09-24 21:38:20,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:38:20,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-09-24 21:38:20,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-09-24 21:38:20,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-09-24 21:38:20,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-09-24 21:38:20,065 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 146 [2020-09-24 21:38:20,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:38:20,066 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-09-24 21:38:20,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:38:20,066 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-09-24 21:38:20,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-09-24 21:38:20,068 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:38:20,068 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:38:20,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 21:38:20,068 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:38:20,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:38:20,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1165083452, now seen corresponding path program 1 times [2020-09-24 21:38:20,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:38:20,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198024002] [2020-09-24 21:38:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:38:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:38:20,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:38:21,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking...