/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=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested9.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 00:05:21,750 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 00:05:21,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 00:05:21,781 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 00:05:21,781 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 00:05:21,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 00:05:21,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 00:05:21,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 00:05:21,788 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 00:05:21,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 00:05:21,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 00:05:21,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 00:05:21,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 00:05:21,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 00:05:21,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 00:05:21,796 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 00:05:21,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 00:05:21,799 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 00:05:21,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 00:05:21,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 00:05:21,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 00:05:21,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 00:05:21,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 00:05:21,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 00:05:21,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 00:05:21,814 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 00:05:21,814 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 00:05:21,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 00:05:21,816 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 00:05:21,817 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 00:05:21,817 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 00:05:21,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 00:05:21,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 00:05:21,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 00:05:21,822 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 00:05:21,822 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 00:05:21,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 00:05:21,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 00:05:21,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 00:05:21,825 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 00:05:21,826 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 00:05:21,827 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 [2020-09-25 00:05:21,855 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 00:05:21,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 00:05:21,857 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 00:05:21,857 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 00:05:21,857 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 00:05:21,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 00:05:21,857 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 00:05:21,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 00:05:21,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 00:05:21,858 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 00:05:21,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 00:05:21,858 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 00:05:21,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 00:05:21,859 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 00:05:21,859 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 00:05:21,859 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 00:05:21,859 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 00:05:21,860 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 00:05:21,860 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 00:05:21,860 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 00:05:21,860 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 00:05:21,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 00:05:21,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 00:05:21,861 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 00:05:21,861 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 00:05:21,862 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 00:05:21,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 00:05:21,862 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 00:05:21,862 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 00:05:21,862 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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;log-additional-information=true; [2020-09-25 00:05:22,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 00:05:22,335 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 00:05:22,340 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 00:05:22,341 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 00:05:22,342 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 00:05:22,343 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested9.i [2020-09-25 00:05:22,443 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/909ebca46/73fd377246a64c8fb0a7c13a5e267a5f/FLAG7c978e3d1 [2020-09-25 00:05:23,002 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 00:05:23,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/nested9.i [2020-09-25 00:05:23,017 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/909ebca46/73fd377246a64c8fb0a7c13a5e267a5f/FLAG7c978e3d1 [2020-09-25 00:05:23,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/909ebca46/73fd377246a64c8fb0a7c13a5e267a5f [2020-09-25 00:05:23,358 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 00:05:23,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 00:05:23,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 00:05:23,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 00:05:23,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 00:05:23,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:05:23" (1/1) ... [2020-09-25 00:05:23,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6251f5ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:23, skipping insertion in model container [2020-09-25 00:05:23,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 12:05:23" (1/1) ... [2020-09-25 00:05:23,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 00:05:23,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 00:05:23,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:05:23,646 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 00:05:23,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 00:05:23,684 INFO L208 MainTranslator]: Completed translation [2020-09-25 00:05:23,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:23 WrapperNode [2020-09-25 00:05:23,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 00:05:23,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 00:05:23,686 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 00:05:23,686 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 00:05:23,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:23" (1/1) ... [2020-09-25 00:05:23,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:23" (1/1) ... [2020-09-25 00:05:23,705 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:23" (1/1) ... [2020-09-25 00:05:23,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:23" (1/1) ... [2020-09-25 00:05:23,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:23" (1/1) ... [2020-09-25 00:05:23,718 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:23" (1/1) ... [2020-09-25 00:05:23,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:23" (1/1) ... [2020-09-25 00:05:23,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 00:05:23,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 00:05:23,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 00:05:23,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 00:05:23,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:23" (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 [2020-09-25 00:05:23,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 00:05:23,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 00:05:23,885 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 00:05:23,885 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 00:05:23,885 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 00:05:23,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 00:05:23,885 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 00:05:23,885 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 00:05:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 00:05:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 00:05:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 00:05:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 00:05:23,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 00:05:24,153 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 00:05:24,154 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 00:05:24,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:05:24 BoogieIcfgContainer [2020-09-25 00:05:24,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 00:05:24,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 00:05:24,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 00:05:24,166 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 00:05:24,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 12:05:23" (1/3) ... [2020-09-25 00:05:24,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6489b9f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:05:24, skipping insertion in model container [2020-09-25 00:05:24,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 12:05:23" (2/3) ... [2020-09-25 00:05:24,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6489b9f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 12:05:24, skipping insertion in model container [2020-09-25 00:05:24,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 12:05:24" (3/3) ... [2020-09-25 00:05:24,170 INFO L109 eAbstractionObserver]: Analyzing ICFG nested9.i [2020-09-25 00:05:24,185 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 00:05:24,198 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 00:05:24,257 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 00:05:24,325 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 00:05:24,325 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 00:05:24,326 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 00:05:24,326 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 00:05:24,326 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 00:05:24,326 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 00:05:24,326 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 00:05:24,326 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 00:05:24,361 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-09-25 00:05:24,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-25 00:05:24,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:24,375 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] [2020-09-25 00:05:24,376 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:24,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:24,384 INFO L82 PathProgramCache]: Analyzing trace with hash -980226087, now seen corresponding path program 1 times [2020-09-25 00:05:24,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:24,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016842441] [2020-09-25 00:05:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:24,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:24,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:25,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:25,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:25,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:25,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:25,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:25,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:25,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:25,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-25 00:05:25,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-09-25 00:05:25,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1170 [2020-09-25 00:05:25,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:25,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 00:05:25,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 00:05:25,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:05:25,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 00:05:25,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:25,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:25,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:25,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 00:05:25,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:25,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 00:05:25,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:25,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:25,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:25,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:25,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:25,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016842441] [2020-09-25 00:05:25,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 00:05:25,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 00:05:25,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243658841] [2020-09-25 00:05:25,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 00:05:25,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:25,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 00:05:25,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 00:05:25,913 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 6 states. [2020-09-25 00:05:26,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:26,293 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2020-09-25 00:05:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 00:05:26,295 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-09-25 00:05:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:26,307 INFO L225 Difference]: With dead ends: 96 [2020-09-25 00:05:26,308 INFO L226 Difference]: Without dead ends: 59 [2020-09-25 00:05:26,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-09-25 00:05:26,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-25 00:05:26,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-09-25 00:05:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-25 00:05:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-09-25 00:05:26,367 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 34 [2020-09-25 00:05:26,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:26,368 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-09-25 00:05:26,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 00:05:26,369 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-09-25 00:05:26,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 00:05:26,370 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:26,371 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:26,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 00:05:26,371 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:26,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:26,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1377800797, now seen corresponding path program 1 times [2020-09-25 00:05:26,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:26,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281924602] [2020-09-25 00:05:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:26,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:26,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:26,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:26,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:26,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:27,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:27,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:27,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:27,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:27,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:28,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:28,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:28,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 00:05:28,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 00:05:28,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1869 [2020-09-25 00:05:28,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:28,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 00:05:28,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 00:05:28,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 00:05:28,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:28,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:28,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:28,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:28,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:28,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 00:05:28,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:28,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:05:28,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:28,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:28,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:28,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:28,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:28,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281924602] [2020-09-25 00:05:28,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:28,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 00:05:28,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175386666] [2020-09-25 00:05:28,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 00:05:28,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:28,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 00:05:28,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-09-25 00:05:28,419 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 11 states. [2020-09-25 00:05:29,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:29,099 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-09-25 00:05:29,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-25 00:05:29,100 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-09-25 00:05:29,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:29,104 INFO L225 Difference]: With dead ends: 93 [2020-09-25 00:05:29,104 INFO L226 Difference]: Without dead ends: 91 [2020-09-25 00:05:29,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-25 00:05:29,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-25 00:05:29,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 70. [2020-09-25 00:05:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-25 00:05:29,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2020-09-25 00:05:29,126 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 40 [2020-09-25 00:05:29,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:29,127 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2020-09-25 00:05:29,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 00:05:29,127 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2020-09-25 00:05:29,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-25 00:05:29,129 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:29,129 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:29,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 00:05:29,130 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:29,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:29,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1038172641, now seen corresponding path program 2 times [2020-09-25 00:05:29,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:29,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568553172] [2020-09-25 00:05:29,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:29,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:29,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:29,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:29,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:29,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:29,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:29,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:30,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:30,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:30,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:30,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:31,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:31,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:31,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:31,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:31,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:32,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:32,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:32,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:33,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:34,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:34,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:34,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 00:05:34,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-09-25 00:05:34,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4983 [2020-09-25 00:05:34,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:34,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 00:05:34,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 00:05:34,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 00:05:34,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:34,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:34,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:34,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:34,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 00:05:34,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:34,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 00:05:34,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:34,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:34,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:34,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:34,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 00:05:34,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568553172] [2020-09-25 00:05:34,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:34,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 00:05:34,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683740482] [2020-09-25 00:05:34,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 00:05:34,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:34,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 00:05:34,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-09-25 00:05:34,299 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand 13 states. [2020-09-25 00:05:35,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:35,359 INFO L93 Difference]: Finished difference Result 136 states and 154 transitions. [2020-09-25 00:05:35,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-25 00:05:35,360 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2020-09-25 00:05:35,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:35,362 INFO L225 Difference]: With dead ends: 136 [2020-09-25 00:05:35,362 INFO L226 Difference]: Without dead ends: 134 [2020-09-25 00:05:35,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2020-09-25 00:05:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-25 00:05:35,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 98. [2020-09-25 00:05:35,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-25 00:05:35,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 110 transitions. [2020-09-25 00:05:35,380 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 110 transitions. Word has length 46 [2020-09-25 00:05:35,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:35,381 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 110 transitions. [2020-09-25 00:05:35,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 00:05:35,381 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 110 transitions. [2020-09-25 00:05:35,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-25 00:05:35,384 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:35,385 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:35,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 00:05:35,385 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:35,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:35,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1041907301, now seen corresponding path program 3 times [2020-09-25 00:05:35,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:35,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323687200] [2020-09-25 00:05:35,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:35,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:35,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:35,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:35,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:35,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:35,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:38,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:38,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:38,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:39,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:39,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:40,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-25 00:05:40,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-09-25 00:05:40,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 00:05:40,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:40,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 00:05:40,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 00:05:40,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-09-25 00:05:40,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:40,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:40,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:40,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:40,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 00:05:40,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:40,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:05:40,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:40,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:40,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:40,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:40,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:40,486 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 00:05:40,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323687200] [2020-09-25 00:05:40,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:40,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 00:05:40,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883042732] [2020-09-25 00:05:40,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 00:05:40,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:40,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 00:05:40,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 00:05:40,489 INFO L87 Difference]: Start difference. First operand 98 states and 110 transitions. Second operand 8 states. [2020-09-25 00:05:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:40,851 INFO L93 Difference]: Finished difference Result 144 states and 162 transitions. [2020-09-25 00:05:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 00:05:40,852 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-09-25 00:05:40,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:40,854 INFO L225 Difference]: With dead ends: 144 [2020-09-25 00:05:40,854 INFO L226 Difference]: Without dead ends: 142 [2020-09-25 00:05:40,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-09-25 00:05:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-25 00:05:40,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 110. [2020-09-25 00:05:40,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-25 00:05:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2020-09-25 00:05:40,872 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 52 [2020-09-25 00:05:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:40,872 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2020-09-25 00:05:40,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 00:05:40,873 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2020-09-25 00:05:40,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 00:05:40,875 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:40,875 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 00:05:40,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 00:05:40,876 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:40,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:40,876 INFO L82 PathProgramCache]: Analyzing trace with hash 509041138, now seen corresponding path program 1 times [2020-09-25 00:05:40,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:40,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852712234] [2020-09-25 00:05:40,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:40,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:40,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:40,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:41,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:41,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:41,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:41,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:41,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:42,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:42,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:42,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:44,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:44,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:44,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:45,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:45,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:45,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:45,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 00:05:45,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-09-25 00:05:45,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-09-25 00:05:45,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:45,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 00:05:45,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 00:05:45,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 00:05:45,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:45,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:45,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:45,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:45,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:45,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 00:05:45,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:45,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:05:45,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:45,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:45,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:45,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:45,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 00:05:45,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 00:05:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:45,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:45,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:45,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:05:45,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:45,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:05:45,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:45,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:45,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 00:05:45,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:45,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 00:05:46,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852712234] [2020-09-25 00:05:46,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:46,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 00:05:46,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767282370] [2020-09-25 00:05:46,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 00:05:46,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:46,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 00:05:46,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-25 00:05:46,005 INFO L87 Difference]: Start difference. First operand 110 states and 124 transitions. Second operand 9 states. [2020-09-25 00:05:46,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:46,400 INFO L93 Difference]: Finished difference Result 180 states and 204 transitions. [2020-09-25 00:05:46,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 00:05:46,401 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-09-25 00:05:46,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:46,405 INFO L225 Difference]: With dead ends: 180 [2020-09-25 00:05:46,405 INFO L226 Difference]: Without dead ends: 97 [2020-09-25 00:05:46,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-09-25 00:05:46,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-25 00:05:46,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2020-09-25 00:05:46,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-25 00:05:46,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 98 transitions. [2020-09-25 00:05:46,419 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 98 transitions. Word has length 55 [2020-09-25 00:05:46,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:46,420 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 98 transitions. [2020-09-25 00:05:46,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 00:05:46,420 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 98 transitions. [2020-09-25 00:05:46,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-25 00:05:46,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:46,422 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:46,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 00:05:46,422 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:46,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:46,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1758074755, now seen corresponding path program 1 times [2020-09-25 00:05:46,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:46,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507164953] [2020-09-25 00:05:46,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:46,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:46,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:46,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:46,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:46,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:46,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:46,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:47,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:47,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:47,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:47,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:48,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:49,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:49,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:49,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:49,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:49,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:49,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:50,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:51,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:51,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-25 00:05:51,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 36 [2020-09-25 00:05:51,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 00:05:51,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:51,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 00:05:51,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 00:05:51,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-25 00:05:51,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:51,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:51,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:51,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:51,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:51,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 00:05:51,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:51,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:05:51,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:51,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:51,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:51,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:51,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:51,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-25 00:05:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:51,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:51,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:51,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:05:51,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:51,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 00:05:51,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:51,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 00:05:51,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:51,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 00:05:51,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 00:05:51,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507164953] [2020-09-25 00:05:51,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:51,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-25 00:05:51,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570021604] [2020-09-25 00:05:51,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-25 00:05:51,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:51,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-25 00:05:51,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-09-25 00:05:51,650 INFO L87 Difference]: Start difference. First operand 91 states and 98 transitions. Second operand 14 states. [2020-09-25 00:05:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:52,702 INFO L93 Difference]: Finished difference Result 131 states and 144 transitions. [2020-09-25 00:05:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-25 00:05:52,703 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-09-25 00:05:52,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:52,705 INFO L225 Difference]: With dead ends: 131 [2020-09-25 00:05:52,705 INFO L226 Difference]: Without dead ends: 129 [2020-09-25 00:05:52,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=750, Unknown=0, NotChecked=0, Total=930 [2020-09-25 00:05:52,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-25 00:05:52,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 100. [2020-09-25 00:05:52,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-25 00:05:52,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2020-09-25 00:05:52,718 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 61 [2020-09-25 00:05:52,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:52,719 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2020-09-25 00:05:52,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-25 00:05:52,719 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2020-09-25 00:05:52,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-25 00:05:52,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:52,721 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:52,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 00:05:52,721 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:52,721 INFO L82 PathProgramCache]: Analyzing trace with hash -126084763, now seen corresponding path program 2 times [2020-09-25 00:05:52,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:52,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788469174] [2020-09-25 00:05:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:52,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:52,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:52,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:52,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:54,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:54,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:54,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:55,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:55,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:55,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:56,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,756 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:57,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-25 00:05:57,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-09-25 00:05:57,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-09-25 00:05:57,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:57,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 00:05:57,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 00:05:57,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 00:05:57,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:57,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:05:57,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:57,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:57,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 00:05:57,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:57,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:05:57,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:57,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:57,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:05:57,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:57,825 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:57,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-25 00:05:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:57,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:57,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:05:57,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:57,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:05:57,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:57,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:57,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 00:05:57,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:57,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:57,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-25 00:05:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:57,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:57,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:05:57,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:05:57,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:05:57,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:05:57,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:05:57,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:05:57,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 00:05:57,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:05:57,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:05:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-25 00:05:57,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788469174] [2020-09-25 00:05:57,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:05:57,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 00:05:57,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893417973] [2020-09-25 00:05:57,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 00:05:57,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:05:57,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 00:05:57,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 00:05:57,848 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand 9 states. [2020-09-25 00:05:58,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:05:58,275 INFO L93 Difference]: Finished difference Result 152 states and 171 transitions. [2020-09-25 00:05:58,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 00:05:58,275 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-09-25 00:05:58,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:05:58,277 INFO L225 Difference]: With dead ends: 152 [2020-09-25 00:05:58,277 INFO L226 Difference]: Without dead ends: 116 [2020-09-25 00:05:58,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-09-25 00:05:58,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-25 00:05:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 101. [2020-09-25 00:05:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-25 00:05:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 108 transitions. [2020-09-25 00:05:58,303 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 108 transitions. Word has length 70 [2020-09-25 00:05:58,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:05:58,306 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 108 transitions. [2020-09-25 00:05:58,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 00:05:58,306 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 108 transitions. [2020-09-25 00:05:58,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-25 00:05:58,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:05:58,308 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:05:58,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 00:05:58,308 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:05:58,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:05:58,312 INFO L82 PathProgramCache]: Analyzing trace with hash 491183892, now seen corresponding path program 2 times [2020-09-25 00:05:58,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:05:58,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591683802] [2020-09-25 00:05:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:05:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:05:58,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:58,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:05:59,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:01,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:01,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:03,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:03,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-25 00:06:03,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 00:06:03,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 00:06:03,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:03,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 00:06:03,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 00:06:03,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-25 00:06:03,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:03,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:03,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:03,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:03,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 00:06:03,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:03,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:03,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:03,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:03,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:03,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:03,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:03,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-09-25 00:06:03,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:03,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:03,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:03,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:06:03,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:03,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:06:03,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:03,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:03,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 00:06:03,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:03,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:03,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-25 00:06:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:03,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:03,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:03,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:06:03,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:03,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:06:03,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:03,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:03,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 00:06:03,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:03,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-25 00:06:03,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591683802] [2020-09-25 00:06:03,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:03,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 00:06:03,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723467721] [2020-09-25 00:06:03,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 00:06:03,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:03,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 00:06:03,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-09-25 00:06:03,439 INFO L87 Difference]: Start difference. First operand 101 states and 108 transitions. Second operand 10 states. [2020-09-25 00:06:03,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:03,906 INFO L93 Difference]: Finished difference Result 157 states and 176 transitions. [2020-09-25 00:06:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 00:06:03,907 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 70 [2020-09-25 00:06:03,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:03,908 INFO L225 Difference]: With dead ends: 157 [2020-09-25 00:06:03,908 INFO L226 Difference]: Without dead ends: 120 [2020-09-25 00:06:03,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2020-09-25 00:06:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-25 00:06:03,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2020-09-25 00:06:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-25 00:06:03,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2020-09-25 00:06:03,921 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 70 [2020-09-25 00:06:03,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:03,921 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2020-09-25 00:06:03,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 00:06:03,922 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2020-09-25 00:06:03,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-25 00:06:03,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:03,923 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:03,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 00:06:03,923 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:03,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:03,924 INFO L82 PathProgramCache]: Analyzing trace with hash -373240396, now seen corresponding path program 3 times [2020-09-25 00:06:03,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:03,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711089857] [2020-09-25 00:06:03,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:03,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:03,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:03,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:04,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:08,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:08,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:08,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-09-25 00:06:08,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 00:06:08,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-09-25 00:06:08,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:08,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 00:06:08,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-09-25 00:06:08,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-25 00:06:08,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:08,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 00:06:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:08,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:08,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:08,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-25 00:06:08,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:08,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 00:06:08,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:08,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:08,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 00:06:08,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:08,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:08,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-25 00:06:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:08,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:08,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:08,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:06:08,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:08,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:06:08,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:08,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:08,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 00:06:08,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:08,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:08,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-25 00:06:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:08,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:09,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:09,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:06:09,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:09,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:06:09,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:09,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:09,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 00:06:09,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:09,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:09,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-09-25 00:06:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:09,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:09,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 00:06:09,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 00:06:09,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 00:06:09,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 00:06:09,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-25 00:06:09,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 00:06:09,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 00:06:09,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 00:06:09,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 00:06:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-09-25 00:06:09,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711089857] [2020-09-25 00:06:09,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 00:06:09,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 00:06:09,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610513742] [2020-09-25 00:06:09,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 00:06:09,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 00:06:09,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 00:06:09,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 00:06:09,015 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand 7 states. [2020-09-25 00:06:09,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 00:06:09,295 INFO L93 Difference]: Finished difference Result 160 states and 172 transitions. [2020-09-25 00:06:09,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 00:06:09,296 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 79 [2020-09-25 00:06:09,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 00:06:09,298 INFO L225 Difference]: With dead ends: 160 [2020-09-25 00:06:09,298 INFO L226 Difference]: Without dead ends: 104 [2020-09-25 00:06:09,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-09-25 00:06:09,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-25 00:06:09,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-09-25 00:06:09,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-25 00:06:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2020-09-25 00:06:09,308 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 79 [2020-09-25 00:06:09,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 00:06:09,309 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2020-09-25 00:06:09,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 00:06:09,309 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2020-09-25 00:06:09,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-25 00:06:09,310 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 00:06:09,310 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 00:06:09,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 00:06:09,311 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 00:06:09,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 00:06:09,311 INFO L82 PathProgramCache]: Analyzing trace with hash 360013665, now seen corresponding path program 4 times [2020-09-25 00:06:09,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 00:06:09,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247596069] [2020-09-25 00:06:09,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 00:06:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 00:06:09,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:09,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:09,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:09,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:09,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:09,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:09,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:11,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:12,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:12,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:12,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 00:06:12,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking...