/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 10:19:14,612 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 10:19:14,616 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 10:19:14,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 10:19:14,660 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 10:19:14,672 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 10:19:14,674 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 10:19:14,677 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 10:19:14,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 10:19:14,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 10:19:14,681 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 10:19:14,682 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 10:19:14,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 10:19:14,684 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 10:19:14,685 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 10:19:14,686 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 10:19:14,687 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 10:19:14,688 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 10:19:14,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 10:19:14,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 10:19:14,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 10:19:14,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 10:19:14,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 10:19:14,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 10:19:14,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 10:19:14,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 10:19:14,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 10:19:14,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 10:19:14,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 10:19:14,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 10:19:14,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 10:19:14,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 10:19:14,703 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 10:19:14,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 10:19:14,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 10:19:14,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 10:19:14,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 10:19:14,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 10:19:14,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 10:19:14,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 10:19:14,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 10:19:14,709 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 10:19:14,731 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 10:19:14,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 10:19:14,733 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 10:19:14,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 10:19:14,734 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 10:19:14,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 10:19:14,734 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 10:19:14,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 10:19:14,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 10:19:14,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 10:19:14,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 10:19:14,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 10:19:14,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 10:19:14,736 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 10:19:14,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 10:19:14,736 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 10:19:14,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 10:19:14,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 10:19:14,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 10:19:14,737 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 10:19:14,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 10:19:14,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:19:14,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 10:19:14,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 10:19:14,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 10:19:14,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 10:19:14,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 10:19:14,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 10:19:14,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 10:19:14,739 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 10:19:15,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 10:19:15,074 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 10:19:15,078 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 10:19:15,081 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 10:19:15,081 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 10:19:15,082 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2020-10-12 10:19:15,168 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2a6bf314/c918eb4515b74450befb4a86c4d1867e/FLAG82e9d8eab [2020-10-12 10:19:15,738 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 10:19:15,739 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_ptr_single_elem_init-2.i [2020-10-12 10:19:15,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2a6bf314/c918eb4515b74450befb4a86c4d1867e/FLAG82e9d8eab [2020-10-12 10:19:16,089 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c2a6bf314/c918eb4515b74450befb4a86c4d1867e [2020-10-12 10:19:16,102 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 10:19:16,105 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 10:19:16,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 10:19:16,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 10:19:16,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 10:19:16,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:19:16" (1/1) ... [2020-10-12 10:19:16,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1987833a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:19:16, skipping insertion in model container [2020-10-12 10:19:16,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 10:19:16" (1/1) ... [2020-10-12 10:19:16,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 10:19:16,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 10:19:16,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:19:16,458 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 10:19:16,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 10:19:16,525 INFO L208 MainTranslator]: Completed translation [2020-10-12 10:19:16,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:19:16 WrapperNode [2020-10-12 10:19:16,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 10:19:16,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 10:19:16,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 10:19:16,528 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 10:19:16,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:19:16" (1/1) ... [2020-10-12 10:19:16,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:19:16" (1/1) ... [2020-10-12 10:19:16,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:19:16" (1/1) ... [2020-10-12 10:19:16,657 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:19:16" (1/1) ... [2020-10-12 10:19:16,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:19:16" (1/1) ... [2020-10-12 10:19:16,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:19:16" (1/1) ... [2020-10-12 10:19:16,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:19:16" (1/1) ... [2020-10-12 10:19:16,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 10:19:16,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 10:19:16,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 10:19:16,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 10:19:16,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:19:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 10:19:16,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 10:19:16,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 10:19:16,753 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 10:19:16,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 10:19:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 10:19:16,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 10:19:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 10:19:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 10:19:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 10:19:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 10:19:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 10:19:16,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 10:19:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 10:19:16,755 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 10:19:17,031 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 10:19:17,031 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 10:19:17,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:19:17 BoogieIcfgContainer [2020-10-12 10:19:17,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 10:19:17,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 10:19:17,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 10:19:17,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 10:19:17,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 10:19:16" (1/3) ... [2020-10-12 10:19:17,046 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a2dd43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:19:17, skipping insertion in model container [2020-10-12 10:19:17,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 10:19:16" (2/3) ... [2020-10-12 10:19:17,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14a2dd43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 10:19:17, skipping insertion in model container [2020-10-12 10:19:17,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 10:19:17" (3/3) ... [2020-10-12 10:19:17,050 INFO L109 eAbstractionObserver]: Analyzing ICFG array_ptr_single_elem_init-2.i [2020-10-12 10:19:17,071 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 10:19:17,079 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 10:19:17,098 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 10:19:17,131 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 10:19:17,131 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 10:19:17,131 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 10:19:17,132 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 10:19:17,132 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 10:19:17,133 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 10:19:17,133 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 10:19:17,133 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 10:19:17,157 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-12 10:19:17,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 10:19:17,164 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:17,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:17,167 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:17,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:17,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1656037931, now seen corresponding path program 1 times [2020-10-12 10:19:17,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:17,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384737819] [2020-10-12 10:19:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:17,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:17,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:17,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:17,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:17,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 10:19:17,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:19:17,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 220 [2020-10-12 10:19:17,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:17,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 10:19:17,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 10:19:17,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 10:19:17,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 10:19:17,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:17,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:17,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:17,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:17,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:17,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 10:19:17,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:17,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:17,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:17,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:17,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:19:17,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 10:19:17,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384737819] [2020-10-12 10:19:17,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:19:17,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 10:19:17,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303052402] [2020-10-12 10:19:17,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 10:19:17,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:17,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 10:19:17,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:19:17,738 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 4 states. [2020-10-12 10:19:17,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:17,896 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2020-10-12 10:19:17,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 10:19:17,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-12 10:19:17,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:17,908 INFO L225 Difference]: With dead ends: 55 [2020-10-12 10:19:17,908 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 10:19:17,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 10:19:17,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 10:19:17,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-10-12 10:19:17,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 10:19:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-10-12 10:19:17,957 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2020-10-12 10:19:17,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:17,958 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-10-12 10:19:17,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 10:19:17,958 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-10-12 10:19:17,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 10:19:17,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:17,960 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:17,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 10:19:17,960 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:17,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:17,962 INFO L82 PathProgramCache]: Analyzing trace with hash -414258795, now seen corresponding path program 1 times [2020-10-12 10:19:17,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:17,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1257655902] [2020-10-12 10:19:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:18,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:18,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:18,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:18,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:19,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:19,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 10:19:19,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 10:19:19,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1154 [2020-10-12 10:19:19,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:19,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:19:19,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 10:19:19,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 10:19:19,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:19:19,407 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 22 [2020-10-12 10:19:19,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:19,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:19,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:19,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:19,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:19,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:19:19,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:19,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:19,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:19,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:19,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:19:19,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:19:19,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1257655902] [2020-10-12 10:19:19,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:19:19,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 10:19:19,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319169485] [2020-10-12 10:19:19,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 10:19:19,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:19,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 10:19:19,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-12 10:19:19,686 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 7 states. [2020-10-12 10:19:20,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:20,030 INFO L93 Difference]: Finished difference Result 53 states and 65 transitions. [2020-10-12 10:19:20,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 10:19:20,031 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-12 10:19:20,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:20,035 INFO L225 Difference]: With dead ends: 53 [2020-10-12 10:19:20,036 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 10:19:20,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:19:20,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 10:19:20,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-10-12 10:19:20,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 10:19:20,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2020-10-12 10:19:20,053 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 22 [2020-10-12 10:19:20,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:20,053 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2020-10-12 10:19:20,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 10:19:20,053 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2020-10-12 10:19:20,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 10:19:20,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:20,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:20,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 10:19:20,056 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:20,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:20,057 INFO L82 PathProgramCache]: Analyzing trace with hash 129318640, now seen corresponding path program 1 times [2020-10-12 10:19:20,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:20,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048759873] [2020-10-12 10:19:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:20,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:20,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:20,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:21,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:21,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 10:19:21,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 10:19:21,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1035 [2020-10-12 10:19:21,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:21,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:19:21,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:19:21,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 10:19:21,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:21,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:21,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:21,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:21,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:21,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:21,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:21,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:19:21,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:21,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:21,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:21,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:21,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:19:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-12 10:19:21,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048759873] [2020-10-12 10:19:21,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 10:19:21,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 10:19:21,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810320880] [2020-10-12 10:19:21,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:19:21,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:21,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:19:21,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:19:21,179 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand 6 states. [2020-10-12 10:19:21,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:21,340 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-12 10:19:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:19:21,340 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-12 10:19:21,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:21,342 INFO L225 Difference]: With dead ends: 65 [2020-10-12 10:19:21,342 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 10:19:21,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:19:21,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 10:19:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2020-10-12 10:19:21,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 10:19:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2020-10-12 10:19:21,361 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 27 [2020-10-12 10:19:21,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:21,361 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2020-10-12 10:19:21,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:19:21,361 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2020-10-12 10:19:21,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 10:19:21,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:21,364 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:21,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 10:19:21,365 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:21,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:21,367 INFO L82 PathProgramCache]: Analyzing trace with hash -688329810, now seen corresponding path program 1 times [2020-10-12 10:19:21,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:21,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214858791] [2020-10-12 10:19:21,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:21,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:21,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:21,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:21,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 10:19:21,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:19:21,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 180 [2020-10-12 10:19:21,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:21,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 10:19:21,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:19:21,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:19:21,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:21,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:21,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:21,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:21,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:21,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:21,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:19:21,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:21,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:21,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:21,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:21,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 10:19:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 10:19:21,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214858791] [2020-10-12 10:19:21,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:21,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 10:19:21,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16891675] [2020-10-12 10:19:21,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 10:19:21,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:21,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 10:19:21,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:19:21,627 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand 6 states. [2020-10-12 10:19:21,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:21,753 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2020-10-12 10:19:21,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 10:19:21,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-12 10:19:21,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:21,755 INFO L225 Difference]: With dead ends: 73 [2020-10-12 10:19:21,755 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 10:19:21,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 10:19:21,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 10:19:21,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2020-10-12 10:19:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 10:19:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2020-10-12 10:19:21,766 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 27 [2020-10-12 10:19:21,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:21,766 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2020-10-12 10:19:21,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 10:19:21,767 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2020-10-12 10:19:21,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 10:19:21,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:21,768 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:21,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 10:19:21,769 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:21,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:21,769 INFO L82 PathProgramCache]: Analyzing trace with hash -664128169, now seen corresponding path program 2 times [2020-10-12 10:19:21,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:21,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775598203] [2020-10-12 10:19:21,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:21,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:21,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:21,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:22,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:22,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 10:19:22,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:19:22,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 403 [2020-10-12 10:19:22,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:22,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 10:19:22,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 10:19:22,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 10:19:22,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:22,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:22,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:22,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:22,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:22,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:22,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:19:22,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:22,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:22,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:22,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:22,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:22,239 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-12 10:19:22,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775598203] [2020-10-12 10:19:22,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:22,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 10:19:22,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348414878] [2020-10-12 10:19:22,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 10:19:22,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:22,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 10:19:22,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 10:19:22,242 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand 7 states. [2020-10-12 10:19:22,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:22,389 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-10-12 10:19:22,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 10:19:22,390 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-12 10:19:22,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:22,391 INFO L225 Difference]: With dead ends: 90 [2020-10-12 10:19:22,391 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 10:19:22,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 10:19:22,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 10:19:22,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 62. [2020-10-12 10:19:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 10:19:22,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2020-10-12 10:19:22,401 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 38 [2020-10-12 10:19:22,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:22,401 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2020-10-12 10:19:22,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 10:19:22,402 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2020-10-12 10:19:22,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 10:19:22,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:22,403 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:22,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 10:19:22,404 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:22,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:22,404 INFO L82 PathProgramCache]: Analyzing trace with hash 304191085, now seen corresponding path program 3 times [2020-10-12 10:19:22,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:22,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215860775] [2020-10-12 10:19:22,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:22,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:22,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:23,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:23,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 10:19:23,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:19:23,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 672 [2020-10-12 10:19:23,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:23,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 10:19:23,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 10:19:23,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 10:19:23,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:23,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:23,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:23,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:23,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:23,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:23,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:19:23,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:23,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:23,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:23,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:23,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-12 10:19:23,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215860775] [2020-10-12 10:19:23,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:23,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 10:19:23,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704660138] [2020-10-12 10:19:23,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 10:19:23,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:23,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 10:19:23,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:19:23,189 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand 8 states. [2020-10-12 10:19:23,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:23,371 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2020-10-12 10:19:23,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 10:19:23,372 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-10-12 10:19:23,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:23,373 INFO L225 Difference]: With dead ends: 104 [2020-10-12 10:19:23,376 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 10:19:23,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 10:19:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 10:19:23,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 73. [2020-10-12 10:19:23,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 10:19:23,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2020-10-12 10:19:23,392 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 46 [2020-10-12 10:19:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:23,392 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2020-10-12 10:19:23,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 10:19:23,392 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2020-10-12 10:19:23,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 10:19:23,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:23,396 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:23,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 10:19:23,396 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:23,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:23,397 INFO L82 PathProgramCache]: Analyzing trace with hash -828408681, now seen corresponding path program 4 times [2020-10-12 10:19:23,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:23,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651171673] [2020-10-12 10:19:23,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:23,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:23,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:24,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:24,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 10:19:24,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:19:24,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1165 [2020-10-12 10:19:24,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:24,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 10:19:24,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-12 10:19:24,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 10:19:24,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:19:24,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:24,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:24,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:24,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:24,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:24,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 10:19:24,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:24,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:24,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:24,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:24,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:19:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-12 10:19:24,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651171673] [2020-10-12 10:19:24,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:24,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 10:19:24,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096350419] [2020-10-12 10:19:24,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 10:19:24,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:24,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 10:19:24,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:19:24,699 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand 9 states. [2020-10-12 10:19:24,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:24,945 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2020-10-12 10:19:24,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 10:19:24,946 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 54 [2020-10-12 10:19:24,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:24,949 INFO L225 Difference]: With dead ends: 118 [2020-10-12 10:19:24,950 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 10:19:24,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 10:19:24,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 10:19:24,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 84. [2020-10-12 10:19:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 10:19:24,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2020-10-12 10:19:24,969 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 54 [2020-10-12 10:19:24,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:24,971 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2020-10-12 10:19:24,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 10:19:24,972 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2020-10-12 10:19:24,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 10:19:24,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:24,975 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:24,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 10:19:24,976 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:24,976 INFO L82 PathProgramCache]: Analyzing trace with hash 893310253, now seen corresponding path program 5 times [2020-10-12 10:19:24,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:24,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415258551] [2020-10-12 10:19:24,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:25,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:25,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:25,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:25,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 10:19:25,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:19:25,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 746 [2020-10-12 10:19:25,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:25,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 10:19:25,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 10:19:25,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 10:19:25,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:25,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:25,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:25,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:25,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:25,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:25,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:25,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:19:25,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:25,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:25,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:25,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:25,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-12 10:19:25,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415258551] [2020-10-12 10:19:25,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:25,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 10:19:25,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489506526] [2020-10-12 10:19:25,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 10:19:25,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:25,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 10:19:25,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:19:25,838 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand 10 states. [2020-10-12 10:19:26,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:26,025 INFO L93 Difference]: Finished difference Result 132 states and 161 transitions. [2020-10-12 10:19:26,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 10:19:26,026 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 62 [2020-10-12 10:19:26,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:26,027 INFO L225 Difference]: With dead ends: 132 [2020-10-12 10:19:26,027 INFO L226 Difference]: Without dead ends: 103 [2020-10-12 10:19:26,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 10:19:26,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-12 10:19:26,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 95. [2020-10-12 10:19:26,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 10:19:26,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 118 transitions. [2020-10-12 10:19:26,037 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 118 transitions. Word has length 62 [2020-10-12 10:19:26,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:26,037 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 118 transitions. [2020-10-12 10:19:26,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 10:19:26,038 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 118 transitions. [2020-10-12 10:19:26,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 10:19:26,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:26,039 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:26,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 10:19:26,040 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:26,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:26,040 INFO L82 PathProgramCache]: Analyzing trace with hash -615935017, now seen corresponding path program 6 times [2020-10-12 10:19:26,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:26,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988404440] [2020-10-12 10:19:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:26,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:26,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:27,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:27,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 10:19:27,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:19:27,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-10-12 10:19:27,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:27,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 10:19:27,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-12 10:19:27,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 10:19:27,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:27,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:27,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:27,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:27,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:27,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:27,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:19:27,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:27,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:27,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:27,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:27,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:19:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-12 10:19:27,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988404440] [2020-10-12 10:19:27,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:27,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 10:19:27,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429315704] [2020-10-12 10:19:27,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 10:19:27,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:27,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 10:19:27,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:19:27,211 INFO L87 Difference]: Start difference. First operand 95 states and 118 transitions. Second operand 11 states. [2020-10-12 10:19:27,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:27,418 INFO L93 Difference]: Finished difference Result 146 states and 178 transitions. [2020-10-12 10:19:27,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 10:19:27,418 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 70 [2020-10-12 10:19:27,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:27,419 INFO L225 Difference]: With dead ends: 146 [2020-10-12 10:19:27,419 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 10:19:27,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 10:19:27,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 10:19:27,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2020-10-12 10:19:27,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-12 10:19:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 132 transitions. [2020-10-12 10:19:27,437 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 132 transitions. Word has length 70 [2020-10-12 10:19:27,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:27,437 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 132 transitions. [2020-10-12 10:19:27,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 10:19:27,437 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 132 transitions. [2020-10-12 10:19:27,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 10:19:27,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:27,441 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:27,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 10:19:27,441 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:27,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:27,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1889092589, now seen corresponding path program 7 times [2020-10-12 10:19:27,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:27,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265324423] [2020-10-12 10:19:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:27,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:27,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:28,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:28,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 10:19:28,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:19:28,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1342 [2020-10-12 10:19:28,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:28,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 10:19:28,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-12 10:19:28,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 10:19:28,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:28,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:28,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:28,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:28,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:28,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:28,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:19:28,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:28,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:28,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:28,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:28,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-10-12 10:19:28,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265324423] [2020-10-12 10:19:28,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:28,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 10:19:28,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318177908] [2020-10-12 10:19:28,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 10:19:28,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:28,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 10:19:28,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:19:28,912 INFO L87 Difference]: Start difference. First operand 106 states and 132 transitions. Second operand 12 states. [2020-10-12 10:19:29,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:29,176 INFO L93 Difference]: Finished difference Result 160 states and 195 transitions. [2020-10-12 10:19:29,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 10:19:29,178 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 78 [2020-10-12 10:19:29,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:29,180 INFO L225 Difference]: With dead ends: 160 [2020-10-12 10:19:29,180 INFO L226 Difference]: Without dead ends: 125 [2020-10-12 10:19:29,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 10:19:29,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-12 10:19:29,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2020-10-12 10:19:29,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-12 10:19:29,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 146 transitions. [2020-10-12 10:19:29,204 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 146 transitions. Word has length 78 [2020-10-12 10:19:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:29,205 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 146 transitions. [2020-10-12 10:19:29,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 10:19:29,208 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 146 transitions. [2020-10-12 10:19:29,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 10:19:29,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:29,211 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:29,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 10:19:29,212 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:29,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:29,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1861453033, now seen corresponding path program 8 times [2020-10-12 10:19:29,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:29,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8241580] [2020-10-12 10:19:29,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:29,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:29,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:32,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:32,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 10:19:32,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:19:32,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2890 [2020-10-12 10:19:32,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:32,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 10:19:32,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:19:32,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 10:19:32,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:32,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:32,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:32,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:32,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:32,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:32,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:19:32,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:32,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:32,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:32,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:32,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-12 10:19:32,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8241580] [2020-10-12 10:19:32,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:32,258 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 10:19:32,258 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101832735] [2020-10-12 10:19:32,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 10:19:32,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:32,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 10:19:32,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:19:32,259 INFO L87 Difference]: Start difference. First operand 117 states and 146 transitions. Second operand 13 states. [2020-10-12 10:19:32,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:32,466 INFO L93 Difference]: Finished difference Result 174 states and 212 transitions. [2020-10-12 10:19:32,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 10:19:32,467 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 86 [2020-10-12 10:19:32,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:32,468 INFO L225 Difference]: With dead ends: 174 [2020-10-12 10:19:32,468 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 10:19:32,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 10:19:32,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 10:19:32,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2020-10-12 10:19:32,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-12 10:19:32,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 160 transitions. [2020-10-12 10:19:32,476 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 160 transitions. Word has length 86 [2020-10-12 10:19:32,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:32,476 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 160 transitions. [2020-10-12 10:19:32,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 10:19:32,476 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 160 transitions. [2020-10-12 10:19:32,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 10:19:32,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:32,478 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:32,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 10:19:32,478 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:32,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:32,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1223892307, now seen corresponding path program 9 times [2020-10-12 10:19:32,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:32,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517045152] [2020-10-12 10:19:32,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:32,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:32,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:34,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:34,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 10:19:34,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:19:34,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1653 [2020-10-12 10:19:34,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:34,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 10:19:34,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:19:34,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 10:19:34,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:34,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:34,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:34,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:34,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:34,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:34,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:19:34,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:34,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:34,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:34,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:34,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-12 10:19:34,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517045152] [2020-10-12 10:19:34,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:34,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 10:19:34,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607684205] [2020-10-12 10:19:34,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 10:19:34,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:34,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 10:19:34,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:19:34,282 INFO L87 Difference]: Start difference. First operand 128 states and 160 transitions. Second operand 14 states. [2020-10-12 10:19:34,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:34,551 INFO L93 Difference]: Finished difference Result 188 states and 229 transitions. [2020-10-12 10:19:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 10:19:34,552 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 94 [2020-10-12 10:19:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:34,553 INFO L225 Difference]: With dead ends: 188 [2020-10-12 10:19:34,554 INFO L226 Difference]: Without dead ends: 147 [2020-10-12 10:19:34,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 10:19:34,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-12 10:19:34,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 139. [2020-10-12 10:19:34,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-12 10:19:34,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 174 transitions. [2020-10-12 10:19:34,565 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 174 transitions. Word has length 94 [2020-10-12 10:19:34,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:34,566 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 174 transitions. [2020-10-12 10:19:34,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 10:19:34,566 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 174 transitions. [2020-10-12 10:19:34,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-12 10:19:34,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:34,568 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:34,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 10:19:34,568 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:34,569 INFO L82 PathProgramCache]: Analyzing trace with hash -141807017, now seen corresponding path program 10 times [2020-10-12 10:19:34,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:34,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10519708] [2020-10-12 10:19:34,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:34,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:34,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:36,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:36,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-12 10:19:36,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:19:36,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2037 [2020-10-12 10:19:36,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 10:19:36,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:19:36,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 10:19:36,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:36,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:36,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:36,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:36,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:36,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:36,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 10:19:36,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:36,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:36,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:36,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:36,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:19:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-12 10:19:36,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10519708] [2020-10-12 10:19:36,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:36,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 10:19:36,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861138793] [2020-10-12 10:19:36,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 10:19:36,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:36,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 10:19:36,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:19:36,829 INFO L87 Difference]: Start difference. First operand 139 states and 174 transitions. Second operand 15 states. [2020-10-12 10:19:37,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:37,138 INFO L93 Difference]: Finished difference Result 202 states and 246 transitions. [2020-10-12 10:19:37,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 10:19:37,138 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 102 [2020-10-12 10:19:37,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:37,140 INFO L225 Difference]: With dead ends: 202 [2020-10-12 10:19:37,141 INFO L226 Difference]: Without dead ends: 158 [2020-10-12 10:19:37,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 10:19:37,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-12 10:19:37,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2020-10-12 10:19:37,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-12 10:19:37,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2020-10-12 10:19:37,151 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 102 [2020-10-12 10:19:37,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:37,152 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2020-10-12 10:19:37,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 10:19:37,152 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2020-10-12 10:19:37,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-12 10:19:37,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:37,153 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:37,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 10:19:37,154 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:37,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:37,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1718989165, now seen corresponding path program 11 times [2020-10-12 10:19:37,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:37,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144642187] [2020-10-12 10:19:37,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:37,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:37,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:37,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:40,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:40,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 10:19:40,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:19:40,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3624 [2020-10-12 10:19:40,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:40,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 10:19:40,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:19:40,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 10:19:40,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:40,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:40,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:40,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:40,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:40,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:40,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:19:40,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:40,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:40,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:40,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:40,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-12 10:19:40,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144642187] [2020-10-12 10:19:40,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:40,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 10:19:40,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555203338] [2020-10-12 10:19:40,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 10:19:40,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:40,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 10:19:40,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:19:40,982 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand 16 states. [2020-10-12 10:19:41,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:41,335 INFO L93 Difference]: Finished difference Result 216 states and 263 transitions. [2020-10-12 10:19:41,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 10:19:41,336 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 110 [2020-10-12 10:19:41,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:41,338 INFO L225 Difference]: With dead ends: 216 [2020-10-12 10:19:41,338 INFO L226 Difference]: Without dead ends: 169 [2020-10-12 10:19:41,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 10:19:41,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-12 10:19:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 161. [2020-10-12 10:19:41,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-12 10:19:41,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 202 transitions. [2020-10-12 10:19:41,351 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 202 transitions. Word has length 110 [2020-10-12 10:19:41,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:41,352 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 202 transitions. [2020-10-12 10:19:41,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 10:19:41,352 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 202 transitions. [2020-10-12 10:19:41,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-12 10:19:41,358 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:41,359 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:41,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 10:19:41,360 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:41,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:41,360 INFO L82 PathProgramCache]: Analyzing trace with hash -882067049, now seen corresponding path program 12 times [2020-10-12 10:19:41,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:41,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580080489] [2020-10-12 10:19:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:41,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:41,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:43,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:43,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-12 10:19:43,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:19:43,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2407 [2020-10-12 10:19:43,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:43,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 10:19:43,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:19:43,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 10:19:43,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:19:44,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:44,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:44,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:44,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:44,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:44,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:44,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:19:44,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:44,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:44,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:44,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:44,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:19:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-12 10:19:44,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580080489] [2020-10-12 10:19:44,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:44,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 10:19:44,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947745727] [2020-10-12 10:19:44,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 10:19:44,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:44,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 10:19:44,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:19:44,058 INFO L87 Difference]: Start difference. First operand 161 states and 202 transitions. Second operand 17 states. [2020-10-12 10:19:44,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:44,417 INFO L93 Difference]: Finished difference Result 230 states and 280 transitions. [2020-10-12 10:19:44,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 10:19:44,418 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 118 [2020-10-12 10:19:44,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:44,419 INFO L225 Difference]: With dead ends: 230 [2020-10-12 10:19:44,419 INFO L226 Difference]: Without dead ends: 180 [2020-10-12 10:19:44,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 10:19:44,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-12 10:19:44,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2020-10-12 10:19:44,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-12 10:19:44,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 216 transitions. [2020-10-12 10:19:44,431 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 216 transitions. Word has length 118 [2020-10-12 10:19:44,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:44,432 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 216 transitions. [2020-10-12 10:19:44,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 10:19:44,432 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 216 transitions. [2020-10-12 10:19:44,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-12 10:19:44,434 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:44,434 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:44,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 10:19:44,434 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:44,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:44,435 INFO L82 PathProgramCache]: Analyzing trace with hash 128954413, now seen corresponding path program 13 times [2020-10-12 10:19:44,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:44,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871592173] [2020-10-12 10:19:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:44,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:44,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:46,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:46,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-12 10:19:46,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:19:46,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2542 [2020-10-12 10:19:46,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:46,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 10:19:46,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:19:46,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 10:19:46,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:47,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:47,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:47,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:47,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:47,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:47,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:47,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:19:47,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:47,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:47,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:47,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:47,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 10:19:47,224 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-12 10:19:47,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871592173] [2020-10-12 10:19:47,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:47,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 10:19:47,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127234759] [2020-10-12 10:19:47,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 10:19:47,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:47,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 10:19:47,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:19:47,230 INFO L87 Difference]: Start difference. First operand 172 states and 216 transitions. Second operand 18 states. [2020-10-12 10:19:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:47,557 INFO L93 Difference]: Finished difference Result 244 states and 297 transitions. [2020-10-12 10:19:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 10:19:47,558 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 126 [2020-10-12 10:19:47,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:47,559 INFO L225 Difference]: With dead ends: 244 [2020-10-12 10:19:47,559 INFO L226 Difference]: Without dead ends: 191 [2020-10-12 10:19:47,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 10:19:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-12 10:19:47,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 183. [2020-10-12 10:19:47,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-12 10:19:47,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 230 transitions. [2020-10-12 10:19:47,569 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 230 transitions. Word has length 126 [2020-10-12 10:19:47,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:47,570 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 230 transitions. [2020-10-12 10:19:47,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 10:19:47,570 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 230 transitions. [2020-10-12 10:19:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-12 10:19:47,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:47,571 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:47,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 10:19:47,572 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:47,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:47,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1101917993, now seen corresponding path program 14 times [2020-10-12 10:19:47,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:47,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883763870] [2020-10-12 10:19:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:47,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:47,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:50,086 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:50,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-12 10:19:50,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:19:50,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2496 [2020-10-12 10:19:50,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:50,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 10:19:50,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-12 10:19:50,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 10:19:50,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:50,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:50,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:50,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:50,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:50,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:50,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:19:50,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:50,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:50,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:50,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:50,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2020-10-12 10:19:50,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883763870] [2020-10-12 10:19:50,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:50,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 10:19:50,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146131535] [2020-10-12 10:19:50,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 10:19:50,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:50,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 10:19:50,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:19:50,323 INFO L87 Difference]: Start difference. First operand 183 states and 230 transitions. Second operand 19 states. [2020-10-12 10:19:50,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:50,689 INFO L93 Difference]: Finished difference Result 258 states and 314 transitions. [2020-10-12 10:19:50,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 10:19:50,689 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 134 [2020-10-12 10:19:50,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:50,691 INFO L225 Difference]: With dead ends: 258 [2020-10-12 10:19:50,691 INFO L226 Difference]: Without dead ends: 202 [2020-10-12 10:19:50,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 10:19:50,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-12 10:19:50,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2020-10-12 10:19:50,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-12 10:19:50,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 244 transitions. [2020-10-12 10:19:50,698 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 244 transitions. Word has length 134 [2020-10-12 10:19:50,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:50,698 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 244 transitions. [2020-10-12 10:19:50,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 10:19:50,699 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 244 transitions. [2020-10-12 10:19:50,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-12 10:19:50,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:50,700 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:50,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 10:19:50,701 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:50,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:50,701 INFO L82 PathProgramCache]: Analyzing trace with hash 244768493, now seen corresponding path program 15 times [2020-10-12 10:19:50,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:50,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748437055] [2020-10-12 10:19:50,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:50,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:50,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:53,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:53,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-12 10:19:53,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:19:53,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2710 [2020-10-12 10:19:53,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:53,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 10:19:53,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-12 10:19:53,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 10:19:53,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:53,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:53,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:53,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:53,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:53,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:53,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:19:53,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:53,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:53,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:53,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:53,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 10:19:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2020-10-12 10:19:53,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748437055] [2020-10-12 10:19:53,699 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:53,699 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 10:19:53,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957946091] [2020-10-12 10:19:53,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 10:19:53,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:53,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 10:19:53,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:19:53,705 INFO L87 Difference]: Start difference. First operand 194 states and 244 transitions. Second operand 20 states. [2020-10-12 10:19:54,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:54,090 INFO L93 Difference]: Finished difference Result 272 states and 331 transitions. [2020-10-12 10:19:54,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 10:19:54,090 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 142 [2020-10-12 10:19:54,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:54,091 INFO L225 Difference]: With dead ends: 272 [2020-10-12 10:19:54,092 INFO L226 Difference]: Without dead ends: 213 [2020-10-12 10:19:54,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 10:19:54,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-12 10:19:54,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 205. [2020-10-12 10:19:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-12 10:19:54,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 258 transitions. [2020-10-12 10:19:54,100 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 258 transitions. Word has length 142 [2020-10-12 10:19:54,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:54,100 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 258 transitions. [2020-10-12 10:19:54,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 10:19:54,101 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 258 transitions. [2020-10-12 10:19:54,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-12 10:19:54,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:54,102 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:54,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 10:19:54,103 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:54,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:54,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1226819561, now seen corresponding path program 16 times [2020-10-12 10:19:54,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:54,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92330497] [2020-10-12 10:19:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:54,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:54,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:57,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:57,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-12 10:19:57,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:19:57,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3041 [2020-10-12 10:19:57,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:57,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 10:19:57,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:19:57,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-12 10:19:57,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:57,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:19:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:57,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:57,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:19:57,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:19:57,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:19:57,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:19:57,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:19:57,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:19:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:19:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:19:57,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:19:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 697 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-12 10:19:57,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92330497] [2020-10-12 10:19:57,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:19:57,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 10:19:57,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428486270] [2020-10-12 10:19:57,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 10:19:57,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:19:57,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 10:19:57,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:19:57,416 INFO L87 Difference]: Start difference. First operand 205 states and 258 transitions. Second operand 21 states. [2020-10-12 10:19:57,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:19:57,841 INFO L93 Difference]: Finished difference Result 286 states and 348 transitions. [2020-10-12 10:19:57,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 10:19:57,841 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 150 [2020-10-12 10:19:57,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:19:57,843 INFO L225 Difference]: With dead ends: 286 [2020-10-12 10:19:57,843 INFO L226 Difference]: Without dead ends: 224 [2020-10-12 10:19:57,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 10:19:57,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-12 10:19:57,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 216. [2020-10-12 10:19:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-12 10:19:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 272 transitions. [2020-10-12 10:19:57,853 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 272 transitions. Word has length 150 [2020-10-12 10:19:57,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:19:57,854 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 272 transitions. [2020-10-12 10:19:57,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 10:19:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 272 transitions. [2020-10-12 10:19:57,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-12 10:19:57,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:19:57,856 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:19:57,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 10:19:57,856 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:19:57,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:19:57,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1710801491, now seen corresponding path program 17 times [2020-10-12 10:19:57,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:19:57,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311412033] [2020-10-12 10:19:57,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:19:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:19:57,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:19:58,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:01,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:01,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-12 10:20:01,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:20:01,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3649 [2020-10-12 10:20:01,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:01,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 10:20:01,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:20:01,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-12 10:20:01,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:01,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:01,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:01,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:01,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:01,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:01,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:20:01,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:01,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:20:01,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:01,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:20:01,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 783 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-12 10:20:01,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311412033] [2020-10-12 10:20:01,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:01,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 10:20:01,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774651336] [2020-10-12 10:20:01,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 10:20:01,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:01,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 10:20:01,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:20:01,816 INFO L87 Difference]: Start difference. First operand 216 states and 272 transitions. Second operand 22 states. [2020-10-12 10:20:02,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:02,221 INFO L93 Difference]: Finished difference Result 300 states and 365 transitions. [2020-10-12 10:20:02,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 10:20:02,223 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 158 [2020-10-12 10:20:02,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:02,225 INFO L225 Difference]: With dead ends: 300 [2020-10-12 10:20:02,225 INFO L226 Difference]: Without dead ends: 235 [2020-10-12 10:20:02,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 10:20:02,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-12 10:20:02,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 227. [2020-10-12 10:20:02,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-12 10:20:02,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 286 transitions. [2020-10-12 10:20:02,234 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 286 transitions. Word has length 158 [2020-10-12 10:20:02,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:02,234 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 286 transitions. [2020-10-12 10:20:02,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 10:20:02,234 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 286 transitions. [2020-10-12 10:20:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-12 10:20:02,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:02,236 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:02,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 10:20:02,237 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:02,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:02,237 INFO L82 PathProgramCache]: Analyzing trace with hash 280702807, now seen corresponding path program 18 times [2020-10-12 10:20:02,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:02,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822435255] [2020-10-12 10:20:02,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:02,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:02,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:02,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:06,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:06,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-12 10:20:06,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:20:06,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4191 [2020-10-12 10:20:06,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:06,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 10:20:06,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 108 [2020-10-12 10:20:06,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 10:20:06,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:06,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:06,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:06,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:06,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:06,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:06,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:20:06,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:06,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:20:06,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:06,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:20:06,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2020-10-12 10:20:06,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822435255] [2020-10-12 10:20:06,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:06,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 10:20:06,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193102416] [2020-10-12 10:20:06,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 10:20:06,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:06,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 10:20:06,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:20:06,732 INFO L87 Difference]: Start difference. First operand 227 states and 286 transitions. Second operand 23 states. [2020-10-12 10:20:07,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:07,139 INFO L93 Difference]: Finished difference Result 314 states and 382 transitions. [2020-10-12 10:20:07,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 10:20:07,139 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 166 [2020-10-12 10:20:07,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:07,141 INFO L225 Difference]: With dead ends: 314 [2020-10-12 10:20:07,141 INFO L226 Difference]: Without dead ends: 246 [2020-10-12 10:20:07,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 10:20:07,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-12 10:20:07,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 238. [2020-10-12 10:20:07,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-10-12 10:20:07,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 300 transitions. [2020-10-12 10:20:07,150 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 300 transitions. Word has length 166 [2020-10-12 10:20:07,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:07,151 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 300 transitions. [2020-10-12 10:20:07,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 10:20:07,151 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 300 transitions. [2020-10-12 10:20:07,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-12 10:20:07,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:07,153 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:07,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 10:20:07,154 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:07,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:07,154 INFO L82 PathProgramCache]: Analyzing trace with hash 870108269, now seen corresponding path program 19 times [2020-10-12 10:20:07,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:07,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955680003] [2020-10-12 10:20:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:07,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:07,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:12,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:12,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-12 10:20:12,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:20:12,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 10:20:12,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:12,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 10:20:12,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:20:12,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-12 10:20:12,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:12,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:12,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:12,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:12,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:12,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:12,485 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:20:12,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:12,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:20:12,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:12,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:20:12,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 970 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-10-12 10:20:12,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955680003] [2020-10-12 10:20:12,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:12,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 10:20:12,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179110212] [2020-10-12 10:20:12,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 10:20:12,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:12,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 10:20:12,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:20:12,504 INFO L87 Difference]: Start difference. First operand 238 states and 300 transitions. Second operand 24 states. [2020-10-12 10:20:13,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:13,003 INFO L93 Difference]: Finished difference Result 328 states and 399 transitions. [2020-10-12 10:20:13,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 10:20:13,003 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 174 [2020-10-12 10:20:13,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:13,006 INFO L225 Difference]: With dead ends: 328 [2020-10-12 10:20:13,007 INFO L226 Difference]: Without dead ends: 257 [2020-10-12 10:20:13,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 10:20:13,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-12 10:20:13,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 249. [2020-10-12 10:20:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-12 10:20:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 314 transitions. [2020-10-12 10:20:13,016 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 314 transitions. Word has length 174 [2020-10-12 10:20:13,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:13,016 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 314 transitions. [2020-10-12 10:20:13,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 10:20:13,016 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 314 transitions. [2020-10-12 10:20:13,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-12 10:20:13,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:13,018 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:13,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 10:20:13,018 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:13,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:13,019 INFO L82 PathProgramCache]: Analyzing trace with hash -595134825, now seen corresponding path program 20 times [2020-10-12 10:20:13,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:13,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034934591] [2020-10-12 10:20:13,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:13,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:13,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:18,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:18,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-12 10:20:18,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:20:18,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:20:18,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:18,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 10:20:18,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:20:18,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-12 10:20:18,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:18,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:18,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:18,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:18,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:18,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:18,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:20:18,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:18,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:20:18,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:18,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:20:18,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:18,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 1071 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-10-12 10:20:18,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034934591] [2020-10-12 10:20:18,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:18,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 10:20:18,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430381163] [2020-10-12 10:20:18,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 10:20:18,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:18,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 10:20:18,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:20:18,415 INFO L87 Difference]: Start difference. First operand 249 states and 314 transitions. Second operand 25 states. [2020-10-12 10:20:18,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:18,924 INFO L93 Difference]: Finished difference Result 342 states and 416 transitions. [2020-10-12 10:20:18,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 10:20:18,925 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 182 [2020-10-12 10:20:18,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:18,927 INFO L225 Difference]: With dead ends: 342 [2020-10-12 10:20:18,928 INFO L226 Difference]: Without dead ends: 268 [2020-10-12 10:20:18,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 10:20:18,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-12 10:20:18,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 260. [2020-10-12 10:20:18,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-12 10:20:18,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 328 transitions. [2020-10-12 10:20:18,939 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 328 transitions. Word has length 182 [2020-10-12 10:20:18,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:18,940 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 328 transitions. [2020-10-12 10:20:18,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 10:20:18,940 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 328 transitions. [2020-10-12 10:20:18,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-12 10:20:18,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:18,941 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:18,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 10:20:18,942 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:18,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:18,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1863087315, now seen corresponding path program 21 times [2020-10-12 10:20:18,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:18,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633430357] [2020-10-12 10:20:18,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:18,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:19,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:23,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:23,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-12 10:20:23,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:20:23,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 10:20:23,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:23,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 10:20:23,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 123 [2020-10-12 10:20:23,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 10:20:23,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:24,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:24,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:24,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:24,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:24,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:24,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:20:24,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:24,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:20:24,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:24,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:20:24,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2020-10-12 10:20:24,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633430357] [2020-10-12 10:20:24,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:24,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 10:20:24,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682386249] [2020-10-12 10:20:24,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 10:20:24,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:24,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 10:20:24,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:20:24,341 INFO L87 Difference]: Start difference. First operand 260 states and 328 transitions. Second operand 26 states. [2020-10-12 10:20:24,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:24,847 INFO L93 Difference]: Finished difference Result 356 states and 433 transitions. [2020-10-12 10:20:24,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 10:20:24,848 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 190 [2020-10-12 10:20:24,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:24,850 INFO L225 Difference]: With dead ends: 356 [2020-10-12 10:20:24,850 INFO L226 Difference]: Without dead ends: 279 [2020-10-12 10:20:24,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 10:20:24,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-12 10:20:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 271. [2020-10-12 10:20:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-12 10:20:24,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 342 transitions. [2020-10-12 10:20:24,861 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 342 transitions. Word has length 190 [2020-10-12 10:20:24,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:24,861 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 342 transitions. [2020-10-12 10:20:24,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 10:20:24,861 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 342 transitions. [2020-10-12 10:20:24,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-12 10:20:24,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:24,863 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:24,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 10:20:24,863 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:24,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:24,863 INFO L82 PathProgramCache]: Analyzing trace with hash 535268823, now seen corresponding path program 22 times [2020-10-12 10:20:24,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:24,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967363564] [2020-10-12 10:20:24,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:24,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:25,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:29,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:29,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 206 [2020-10-12 10:20:29,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:20:29,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:20:29,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 10:20:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 128 [2020-10-12 10:20:29,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 10:20:29,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:30,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:30,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:30,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:30,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:30,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:30,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:20:30,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:30,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:20:30,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:30,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:20:30,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2020-10-12 10:20:30,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967363564] [2020-10-12 10:20:30,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:30,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 10:20:30,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356067070] [2020-10-12 10:20:30,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 10:20:30,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:30,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 10:20:30,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:20:30,379 INFO L87 Difference]: Start difference. First operand 271 states and 342 transitions. Second operand 27 states. [2020-10-12 10:20:30,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:30,845 INFO L93 Difference]: Finished difference Result 370 states and 450 transitions. [2020-10-12 10:20:30,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 10:20:30,845 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 198 [2020-10-12 10:20:30,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:30,848 INFO L225 Difference]: With dead ends: 370 [2020-10-12 10:20:30,848 INFO L226 Difference]: Without dead ends: 290 [2020-10-12 10:20:30,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 10:20:30,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-12 10:20:30,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 282. [2020-10-12 10:20:30,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-10-12 10:20:30,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 356 transitions. [2020-10-12 10:20:30,859 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 356 transitions. Word has length 198 [2020-10-12 10:20:30,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:30,859 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 356 transitions. [2020-10-12 10:20:30,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 10:20:30,859 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 356 transitions. [2020-10-12 10:20:30,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-12 10:20:30,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:30,861 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:30,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 10:20:30,861 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:30,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:30,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1361541613, now seen corresponding path program 23 times [2020-10-12 10:20:30,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:30,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839158300] [2020-10-12 10:20:30,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:30,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:31,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:35,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:35,884 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-12 10:20:35,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:20:35,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:20:35,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:35,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 10:20:35,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-12 10:20:35,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 10:20:35,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:36,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:36,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:36,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:36,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:36,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:36,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:36,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:20:36,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:36,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:20:36,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:36,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:20:36,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-10-12 10:20:36,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839158300] [2020-10-12 10:20:36,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:36,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 10:20:36,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557363573] [2020-10-12 10:20:36,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 10:20:36,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:36,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 10:20:36,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:20:36,335 INFO L87 Difference]: Start difference. First operand 282 states and 356 transitions. Second operand 28 states. [2020-10-12 10:20:36,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:36,953 INFO L93 Difference]: Finished difference Result 384 states and 467 transitions. [2020-10-12 10:20:36,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 10:20:36,953 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 206 [2020-10-12 10:20:36,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:36,955 INFO L225 Difference]: With dead ends: 384 [2020-10-12 10:20:36,956 INFO L226 Difference]: Without dead ends: 301 [2020-10-12 10:20:36,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 10:20:36,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-10-12 10:20:36,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 293. [2020-10-12 10:20:36,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-10-12 10:20:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 370 transitions. [2020-10-12 10:20:36,968 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 370 transitions. Word has length 206 [2020-10-12 10:20:36,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:36,968 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 370 transitions. [2020-10-12 10:20:36,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 10:20:36,968 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 370 transitions. [2020-10-12 10:20:36,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-12 10:20:36,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:36,970 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:36,970 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 10:20:36,970 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:36,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:36,971 INFO L82 PathProgramCache]: Analyzing trace with hash 360772887, now seen corresponding path program 24 times [2020-10-12 10:20:36,971 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:36,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4389388] [2020-10-12 10:20:36,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:37,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:37,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:42,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:42,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-10-12 10:20:42,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:20:42,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 10:20:42,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:42,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 10:20:42,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 138 [2020-10-12 10:20:42,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 10:20:42,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:42,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:42,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:42,449 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:42,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:42,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:42,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:20:42,450 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:42,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:20:42,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:42,450 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:20:42,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2020-10-12 10:20:42,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4389388] [2020-10-12 10:20:42,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:42,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 10:20:42,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601902098] [2020-10-12 10:20:42,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 10:20:42,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:42,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 10:20:42,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:20:42,474 INFO L87 Difference]: Start difference. First operand 293 states and 370 transitions. Second operand 29 states. [2020-10-12 10:20:43,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:43,058 INFO L93 Difference]: Finished difference Result 398 states and 484 transitions. [2020-10-12 10:20:43,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 10:20:43,058 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 214 [2020-10-12 10:20:43,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:43,061 INFO L225 Difference]: With dead ends: 398 [2020-10-12 10:20:43,061 INFO L226 Difference]: Without dead ends: 312 [2020-10-12 10:20:43,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 10:20:43,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-10-12 10:20:43,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 304. [2020-10-12 10:20:43,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-10-12 10:20:43,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 384 transitions. [2020-10-12 10:20:43,073 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 384 transitions. Word has length 214 [2020-10-12 10:20:43,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:43,073 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 384 transitions. [2020-10-12 10:20:43,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 10:20:43,073 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 384 transitions. [2020-10-12 10:20:43,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-12 10:20:43,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:43,075 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:43,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 10:20:43,075 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:43,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:43,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1084974931, now seen corresponding path program 25 times [2020-10-12 10:20:43,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:43,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879169837] [2020-10-12 10:20:43,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:43,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:43,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:48,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:48,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-12 10:20:48,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:20:48,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 10:20:48,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:48,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 10:20:48,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:20:48,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-12 10:20:48,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:48,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:48,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:48,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:48,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:48,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:48,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:48,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:20:48,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:48,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:20:48,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:48,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:20:48,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1651 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-10-12 10:20:48,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879169837] [2020-10-12 10:20:48,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:48,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 10:20:48,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328405448] [2020-10-12 10:20:48,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 10:20:48,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:48,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 10:20:48,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:20:48,608 INFO L87 Difference]: Start difference. First operand 304 states and 384 transitions. Second operand 30 states. [2020-10-12 10:20:49,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:49,273 INFO L93 Difference]: Finished difference Result 412 states and 501 transitions. [2020-10-12 10:20:49,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 10:20:49,273 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 222 [2020-10-12 10:20:49,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:49,276 INFO L225 Difference]: With dead ends: 412 [2020-10-12 10:20:49,277 INFO L226 Difference]: Without dead ends: 323 [2020-10-12 10:20:49,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 10:20:49,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-12 10:20:49,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 315. [2020-10-12 10:20:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-10-12 10:20:49,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 398 transitions. [2020-10-12 10:20:49,288 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 398 transitions. Word has length 222 [2020-10-12 10:20:49,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:49,289 INFO L479 AbstractCegarLoop]: Abstraction has 315 states and 398 transitions. [2020-10-12 10:20:49,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 10:20:49,289 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 398 transitions. [2020-10-12 10:20:49,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-10-12 10:20:49,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:49,291 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:49,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 10:20:49,292 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:49,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:49,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1828138071, now seen corresponding path program 26 times [2020-10-12 10:20:49,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:49,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205335300] [2020-10-12 10:20:49,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:49,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:49,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:54,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:54,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-12 10:20:54,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:20:54,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 10:20:54,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:54,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 10:20:54,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 148 [2020-10-12 10:20:54,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 10:20:54,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:54,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:20:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:54,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:54,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:20:54,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:20:54,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:20:54,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 10:20:54,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:20:54,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:20:54,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:20:54,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:20:54,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:20:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2020-10-12 10:20:54,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205335300] [2020-10-12 10:20:54,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:20:54,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 10:20:54,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570203000] [2020-10-12 10:20:54,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 10:20:54,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:20:54,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 10:20:54,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:20:54,839 INFO L87 Difference]: Start difference. First operand 315 states and 398 transitions. Second operand 31 states. [2020-10-12 10:20:55,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:20:55,462 INFO L93 Difference]: Finished difference Result 426 states and 518 transitions. [2020-10-12 10:20:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 10:20:55,463 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 230 [2020-10-12 10:20:55,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:20:55,466 INFO L225 Difference]: With dead ends: 426 [2020-10-12 10:20:55,466 INFO L226 Difference]: Without dead ends: 334 [2020-10-12 10:20:55,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 10:20:55,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-12 10:20:55,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 326. [2020-10-12 10:20:55,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-10-12 10:20:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 412 transitions. [2020-10-12 10:20:55,476 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 412 transitions. Word has length 230 [2020-10-12 10:20:55,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:20:55,476 INFO L479 AbstractCegarLoop]: Abstraction has 326 states and 412 transitions. [2020-10-12 10:20:55,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 10:20:55,477 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 412 transitions. [2020-10-12 10:20:55,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2020-10-12 10:20:55,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:20:55,478 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:20:55,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 10:20:55,479 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:20:55,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:20:55,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1856575635, now seen corresponding path program 27 times [2020-10-12 10:20:55,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:20:55,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290346385] [2020-10-12 10:20:55,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:20:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:20:55,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:20:55,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:00,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:00,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 246 [2020-10-12 10:21:00,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:21:00,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:21:00,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:00,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 10:21:00,519 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:21:00,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-12 10:21:00,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:01,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:01,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:01,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:01,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:01,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:01,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:21:01,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:01,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:21:01,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:01,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:21:01,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1918 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-10-12 10:21:01,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290346385] [2020-10-12 10:21:01,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:21:01,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 10:21:01,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569021940] [2020-10-12 10:21:01,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 10:21:01,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:01,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 10:21:01,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:21:01,101 INFO L87 Difference]: Start difference. First operand 326 states and 412 transitions. Second operand 32 states. [2020-10-12 10:21:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:01,679 INFO L93 Difference]: Finished difference Result 440 states and 535 transitions. [2020-10-12 10:21:01,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 10:21:01,679 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 238 [2020-10-12 10:21:01,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:01,681 INFO L225 Difference]: With dead ends: 440 [2020-10-12 10:21:01,681 INFO L226 Difference]: Without dead ends: 345 [2020-10-12 10:21:01,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 10:21:01,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-12 10:21:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 337. [2020-10-12 10:21:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-10-12 10:21:01,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 426 transitions. [2020-10-12 10:21:01,692 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 426 transitions. Word has length 238 [2020-10-12 10:21:01,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:01,692 INFO L479 AbstractCegarLoop]: Abstraction has 337 states and 426 transitions. [2020-10-12 10:21:01,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 10:21:01,692 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 426 transitions. [2020-10-12 10:21:01,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-12 10:21:01,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:01,694 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:01,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 10:21:01,695 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:01,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:01,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1964100713, now seen corresponding path program 28 times [2020-10-12 10:21:01,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:01,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241348472] [2020-10-12 10:21:01,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:01,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:02,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:06,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:06,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-12 10:21:06,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:21:06,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 10:21:06,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:06,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 10:21:06,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:21:06,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-12 10:21:06,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:07,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:07,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:07,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:07,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:07,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:07,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:21:07,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:07,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:21:07,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:07,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:21:07,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 2059 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-10-12 10:21:07,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241348472] [2020-10-12 10:21:07,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:21:07,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 10:21:07,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615712594] [2020-10-12 10:21:07,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 10:21:07,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:07,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 10:21:07,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:21:07,362 INFO L87 Difference]: Start difference. First operand 337 states and 426 transitions. Second operand 33 states. [2020-10-12 10:21:08,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:08,025 INFO L93 Difference]: Finished difference Result 454 states and 552 transitions. [2020-10-12 10:21:08,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 10:21:08,026 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 246 [2020-10-12 10:21:08,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:08,028 INFO L225 Difference]: With dead ends: 454 [2020-10-12 10:21:08,029 INFO L226 Difference]: Without dead ends: 356 [2020-10-12 10:21:08,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 10:21:08,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-12 10:21:08,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 348. [2020-10-12 10:21:08,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-12 10:21:08,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 440 transitions. [2020-10-12 10:21:08,041 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 440 transitions. Word has length 246 [2020-10-12 10:21:08,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:08,042 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 440 transitions. [2020-10-12 10:21:08,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 10:21:08,042 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 440 transitions. [2020-10-12 10:21:08,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-10-12 10:21:08,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:08,044 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:08,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 10:21:08,045 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:08,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:08,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1475713491, now seen corresponding path program 29 times [2020-10-12 10:21:08,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:08,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548836606] [2020-10-12 10:21:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:08,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:08,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:13,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:13,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 262 [2020-10-12 10:21:13,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:21:13,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 10:21:13,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:13,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 10:21:13,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-12 10:21:13,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-12 10:21:13,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:13,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:13,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:13,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:13,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:13,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:13,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:21:13,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:13,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:21:13,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:13,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:21:13,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2020-10-12 10:21:13,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548836606] [2020-10-12 10:21:13,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:21:13,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 10:21:13,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622469118] [2020-10-12 10:21:13,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 10:21:13,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:13,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 10:21:13,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:21:13,734 INFO L87 Difference]: Start difference. First operand 348 states and 440 transitions. Second operand 34 states. [2020-10-12 10:21:14,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:14,462 INFO L93 Difference]: Finished difference Result 468 states and 569 transitions. [2020-10-12 10:21:14,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 10:21:14,463 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 254 [2020-10-12 10:21:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:14,466 INFO L225 Difference]: With dead ends: 468 [2020-10-12 10:21:14,466 INFO L226 Difference]: Without dead ends: 367 [2020-10-12 10:21:14,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 10:21:14,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-10-12 10:21:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 359. [2020-10-12 10:21:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 359 states. [2020-10-12 10:21:14,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 454 transitions. [2020-10-12 10:21:14,477 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 454 transitions. Word has length 254 [2020-10-12 10:21:14,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:14,478 INFO L479 AbstractCegarLoop]: Abstraction has 359 states and 454 transitions. [2020-10-12 10:21:14,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 10:21:14,478 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 454 transitions. [2020-10-12 10:21:14,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-10-12 10:21:14,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:14,480 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:14,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 10:21:14,480 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:14,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:14,481 INFO L82 PathProgramCache]: Analyzing trace with hash -922088745, now seen corresponding path program 30 times [2020-10-12 10:21:14,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:14,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130024311] [2020-10-12 10:21:14,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:14,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:15,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:19,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:19,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 270 [2020-10-12 10:21:19,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:21:19,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 10:21:19,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:19,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 10:21:19,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-10-12 10:21:19,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-12 10:21:19,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:20,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:20,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:20,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:20,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:20,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:20,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:21:20,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:20,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:21:20,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:20,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:21:20,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 2356 trivial. 0 not checked. [2020-10-12 10:21:20,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130024311] [2020-10-12 10:21:20,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:21:20,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 10:21:20,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967014476] [2020-10-12 10:21:20,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 10:21:20,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:20,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 10:21:20,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:21:20,193 INFO L87 Difference]: Start difference. First operand 359 states and 454 transitions. Second operand 35 states. [2020-10-12 10:21:20,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:20,940 INFO L93 Difference]: Finished difference Result 482 states and 586 transitions. [2020-10-12 10:21:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 10:21:20,941 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 262 [2020-10-12 10:21:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:20,944 INFO L225 Difference]: With dead ends: 482 [2020-10-12 10:21:20,944 INFO L226 Difference]: Without dead ends: 378 [2020-10-12 10:21:20,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 10:21:20,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-10-12 10:21:20,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 370. [2020-10-12 10:21:20,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-10-12 10:21:20,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 468 transitions. [2020-10-12 10:21:20,964 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 468 transitions. Word has length 262 [2020-10-12 10:21:20,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:20,965 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 468 transitions. [2020-10-12 10:21:20,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 10:21:20,965 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 468 transitions. [2020-10-12 10:21:20,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-12 10:21:20,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:20,967 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:20,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 10:21:20,968 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:20,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:20,968 INFO L82 PathProgramCache]: Analyzing trace with hash -817163027, now seen corresponding path program 31 times [2020-10-12 10:21:20,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:20,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017585880] [2020-10-12 10:21:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:21,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:21,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:26,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:26,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 278 [2020-10-12 10:21:26,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:21:26,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-12 10:21:26,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 10:21:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:21:26,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-10-12 10:21:26,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:26,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:26,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:26,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:26,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:26,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:26,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:21:26,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:26,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:21:26,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:26,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:21:26,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 2512 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2020-10-12 10:21:26,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017585880] [2020-10-12 10:21:26,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:21:26,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 10:21:26,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693622988] [2020-10-12 10:21:26,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 10:21:26,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:26,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 10:21:26,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:21:26,729 INFO L87 Difference]: Start difference. First operand 370 states and 468 transitions. Second operand 36 states. [2020-10-12 10:21:27,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:27,811 INFO L93 Difference]: Finished difference Result 496 states and 603 transitions. [2020-10-12 10:21:27,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 10:21:27,811 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 270 [2020-10-12 10:21:27,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:27,814 INFO L225 Difference]: With dead ends: 496 [2020-10-12 10:21:27,814 INFO L226 Difference]: Without dead ends: 389 [2020-10-12 10:21:27,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 10:21:27,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-10-12 10:21:27,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 381. [2020-10-12 10:21:27,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 381 states. [2020-10-12 10:21:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 482 transitions. [2020-10-12 10:21:27,826 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 482 transitions. Word has length 270 [2020-10-12 10:21:27,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:27,827 INFO L479 AbstractCegarLoop]: Abstraction has 381 states and 482 transitions. [2020-10-12 10:21:27,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 10:21:27,827 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 482 transitions. [2020-10-12 10:21:27,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-10-12 10:21:27,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:27,831 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:27,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 10:21:27,832 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:27,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:27,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1242648041, now seen corresponding path program 32 times [2020-10-12 10:21:27,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:27,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347177194] [2020-10-12 10:21:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:27,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:29,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:32,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:32,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 286 [2020-10-12 10:21:32,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:21:32,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:21:32,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:32,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 10:21:32,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:21:32,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-12 10:21:32,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:33,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:33,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:33,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:33,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:33,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:33,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:21:33,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:33,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:21:33,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:33,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:21:33,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 0 proven. 2673 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-10-12 10:21:33,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347177194] [2020-10-12 10:21:33,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:21:33,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 10:21:33,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523096574] [2020-10-12 10:21:33,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 10:21:33,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:33,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 10:21:33,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:21:33,670 INFO L87 Difference]: Start difference. First operand 381 states and 482 transitions. Second operand 37 states. [2020-10-12 10:21:34,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:34,412 INFO L93 Difference]: Finished difference Result 510 states and 620 transitions. [2020-10-12 10:21:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 10:21:34,412 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 278 [2020-10-12 10:21:34,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:34,416 INFO L225 Difference]: With dead ends: 510 [2020-10-12 10:21:34,416 INFO L226 Difference]: Without dead ends: 400 [2020-10-12 10:21:34,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 10:21:34,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-10-12 10:21:34,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 392. [2020-10-12 10:21:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-10-12 10:21:34,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 496 transitions. [2020-10-12 10:21:34,428 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 496 transitions. Word has length 278 [2020-10-12 10:21:34,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:34,429 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 496 transitions. [2020-10-12 10:21:34,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 10:21:34,429 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 496 transitions. [2020-10-12 10:21:34,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-10-12 10:21:34,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:34,432 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:34,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 10:21:34,432 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:34,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:34,432 INFO L82 PathProgramCache]: Analyzing trace with hash 2113205165, now seen corresponding path program 33 times [2020-10-12 10:21:34,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:34,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752424027] [2020-10-12 10:21:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:34,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:34,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:39,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:39,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 294 [2020-10-12 10:21:39,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:21:39,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 10:21:39,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:39,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 10:21:39,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:21:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-12 10:21:39,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:40,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:40,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:40,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:40,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:40,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:40,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:21:40,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:40,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:21:40,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:40,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:21:40,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:40,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 0 proven. 2839 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2020-10-12 10:21:40,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752424027] [2020-10-12 10:21:40,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:21:40,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 10:21:40,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660906911] [2020-10-12 10:21:40,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 10:21:40,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:40,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 10:21:40,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:21:40,272 INFO L87 Difference]: Start difference. First operand 392 states and 496 transitions. Second operand 38 states. [2020-10-12 10:21:41,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:41,218 INFO L93 Difference]: Finished difference Result 524 states and 637 transitions. [2020-10-12 10:21:41,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 10:21:41,218 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 286 [2020-10-12 10:21:41,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:41,220 INFO L225 Difference]: With dead ends: 524 [2020-10-12 10:21:41,220 INFO L226 Difference]: Without dead ends: 411 [2020-10-12 10:21:41,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 10:21:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-10-12 10:21:41,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 403. [2020-10-12 10:21:41,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-10-12 10:21:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 510 transitions. [2020-10-12 10:21:41,232 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 510 transitions. Word has length 286 [2020-10-12 10:21:41,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:41,233 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 510 transitions. [2020-10-12 10:21:41,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 10:21:41,233 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 510 transitions. [2020-10-12 10:21:41,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-10-12 10:21:41,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:41,237 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:41,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 10:21:41,237 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:41,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:41,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1430268247, now seen corresponding path program 34 times [2020-10-12 10:21:41,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:41,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374364452] [2020-10-12 10:21:41,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:41,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:42,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:46,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:46,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 302 [2020-10-12 10:21:46,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:21:46,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-12 10:21:46,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:46,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 10:21:46,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:21:46,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-12 10:21:46,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:47,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:47,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:47,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:47,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:47,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:47,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:47,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:21:47,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:47,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:21:47,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:47,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:21:47,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:47,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 3010 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2020-10-12 10:21:47,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374364452] [2020-10-12 10:21:47,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:21:47,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 10:21:47,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287893001] [2020-10-12 10:21:47,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 10:21:47,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:47,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 10:21:47,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:21:47,180 INFO L87 Difference]: Start difference. First operand 403 states and 510 transitions. Second operand 39 states. [2020-10-12 10:21:48,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:48,131 INFO L93 Difference]: Finished difference Result 538 states and 654 transitions. [2020-10-12 10:21:48,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 10:21:48,132 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 294 [2020-10-12 10:21:48,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:48,135 INFO L225 Difference]: With dead ends: 538 [2020-10-12 10:21:48,135 INFO L226 Difference]: Without dead ends: 422 [2020-10-12 10:21:48,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 10:21:48,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-10-12 10:21:48,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 414. [2020-10-12 10:21:48,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-10-12 10:21:48,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 524 transitions. [2020-10-12 10:21:48,146 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 524 transitions. Word has length 294 [2020-10-12 10:21:48,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:48,147 INFO L479 AbstractCegarLoop]: Abstraction has 414 states and 524 transitions. [2020-10-12 10:21:48,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 10:21:48,147 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 524 transitions. [2020-10-12 10:21:48,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-10-12 10:21:48,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:48,149 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:48,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 10:21:48,150 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:48,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1780219283, now seen corresponding path program 35 times [2020-10-12 10:21:48,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:48,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [338627984] [2020-10-12 10:21:48,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:48,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:48,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:48,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:53,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:53,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 310 [2020-10-12 10:21:53,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:21:53,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 10:21:53,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:53,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 10:21:53,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 193 [2020-10-12 10:21:53,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-12 10:21:53,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:54,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:21:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:54,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:54,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:21:54,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:21:54,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:21:54,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:21:54,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:21:54,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:21:54,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:21:54,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:21:54,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:21:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 3186 trivial. 0 not checked. [2020-10-12 10:21:54,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [338627984] [2020-10-12 10:21:54,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:21:54,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 10:21:54,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161412359] [2020-10-12 10:21:54,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 10:21:54,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:21:54,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 10:21:54,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:21:54,102 INFO L87 Difference]: Start difference. First operand 414 states and 524 transitions. Second operand 40 states. [2020-10-12 10:21:55,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:21:55,136 INFO L93 Difference]: Finished difference Result 552 states and 671 transitions. [2020-10-12 10:21:55,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 10:21:55,137 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 302 [2020-10-12 10:21:55,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:21:55,140 INFO L225 Difference]: With dead ends: 552 [2020-10-12 10:21:55,140 INFO L226 Difference]: Without dead ends: 433 [2020-10-12 10:21:55,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 10:21:55,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-10-12 10:21:55,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 425. [2020-10-12 10:21:55,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-12 10:21:55,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 538 transitions. [2020-10-12 10:21:55,152 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 538 transitions. Word has length 302 [2020-10-12 10:21:55,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:21:55,152 INFO L479 AbstractCegarLoop]: Abstraction has 425 states and 538 transitions. [2020-10-12 10:21:55,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 10:21:55,153 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 538 transitions. [2020-10-12 10:21:55,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-10-12 10:21:55,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:21:55,155 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:21:55,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 10:21:55,156 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:21:55,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:21:55,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1604481175, now seen corresponding path program 36 times [2020-10-12 10:21:55,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:21:55,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010797301] [2020-10-12 10:21:55,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:21:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:21:55,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:21:56,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:00,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:00,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 318 [2020-10-12 10:22:00,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:22:00,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 10:22:00,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:00,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 10:22:00,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 198 [2020-10-12 10:22:00,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-12 10:22:00,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:22:01,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:22:01,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:01,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:01,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:01,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:22:01,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:22:01,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:22:01,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:01,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:22:01,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:22:01,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:22:01,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:22:01,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 3367 trivial. 0 not checked. [2020-10-12 10:22:01,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010797301] [2020-10-12 10:22:01,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:22:01,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 10:22:01,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181698854] [2020-10-12 10:22:01,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 10:22:01,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:22:01,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 10:22:01,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:22:01,179 INFO L87 Difference]: Start difference. First operand 425 states and 538 transitions. Second operand 41 states. [2020-10-12 10:22:02,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:22:02,255 INFO L93 Difference]: Finished difference Result 566 states and 688 transitions. [2020-10-12 10:22:02,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 10:22:02,256 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 310 [2020-10-12 10:22:02,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:22:02,259 INFO L225 Difference]: With dead ends: 566 [2020-10-12 10:22:02,259 INFO L226 Difference]: Without dead ends: 444 [2020-10-12 10:22:02,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 10:22:02,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2020-10-12 10:22:02,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 436. [2020-10-12 10:22:02,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 436 states. [2020-10-12 10:22:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 552 transitions. [2020-10-12 10:22:02,273 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 552 transitions. Word has length 310 [2020-10-12 10:22:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:22:02,274 INFO L479 AbstractCegarLoop]: Abstraction has 436 states and 552 transitions. [2020-10-12 10:22:02,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 10:22:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 552 transitions. [2020-10-12 10:22:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2020-10-12 10:22:02,276 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:22:02,276 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:22:02,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 10:22:02,276 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:22:02,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:22:02,277 INFO L82 PathProgramCache]: Analyzing trace with hash 603210029, now seen corresponding path program 37 times [2020-10-12 10:22:02,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:22:02,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220975679] [2020-10-12 10:22:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:22:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:02,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:03,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:07,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:07,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 326 [2020-10-12 10:22:07,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:22:07,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 10:22:07,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:07,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 10:22:07,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:22:07,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 192 [2020-10-12 10:22:07,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:22:08,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:22:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:08,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:08,290 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:08,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:22:08,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:22:08,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:22:08,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:08,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:22:08,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:22:08,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:22:08,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:22:08,352 INFO L134 CoverageAnalysis]: Checked inductivity of 5738 backedges. 0 proven. 3553 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2020-10-12 10:22:08,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220975679] [2020-10-12 10:22:08,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:22:08,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 10:22:08,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882431666] [2020-10-12 10:22:08,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 10:22:08,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:22:08,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 10:22:08,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:22:08,355 INFO L87 Difference]: Start difference. First operand 436 states and 552 transitions. Second operand 42 states. [2020-10-12 10:22:09,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:22:09,370 INFO L93 Difference]: Finished difference Result 580 states and 705 transitions. [2020-10-12 10:22:09,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 10:22:09,371 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 318 [2020-10-12 10:22:09,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:22:09,374 INFO L225 Difference]: With dead ends: 580 [2020-10-12 10:22:09,374 INFO L226 Difference]: Without dead ends: 455 [2020-10-12 10:22:09,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 10:22:09,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-10-12 10:22:09,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 447. [2020-10-12 10:22:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-10-12 10:22:09,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 566 transitions. [2020-10-12 10:22:09,393 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 566 transitions. Word has length 318 [2020-10-12 10:22:09,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:22:09,393 INFO L479 AbstractCegarLoop]: Abstraction has 447 states and 566 transitions. [2020-10-12 10:22:09,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 10:22:09,394 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 566 transitions. [2020-10-12 10:22:09,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-12 10:22:09,396 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:22:09,396 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:22:09,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 10:22:09,397 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:22:09,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:22:09,397 INFO L82 PathProgramCache]: Analyzing trace with hash -2101770281, now seen corresponding path program 38 times [2020-10-12 10:22:09,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:22:09,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401985714] [2020-10-12 10:22:09,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:22:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:09,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:09,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:14,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:14,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 334 [2020-10-12 10:22:14,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:22:14,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-12 10:22:14,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:14,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 10:22:14,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:22:14,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 197 [2020-10-12 10:22:14,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:22:15,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:22:15,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:15,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:15,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:15,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:22:15,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:22:15,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:22:15,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:15,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:22:15,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:22:15,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:22:15,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:22:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6045 backedges. 0 proven. 3744 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2020-10-12 10:22:15,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401985714] [2020-10-12 10:22:15,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:22:15,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 10:22:15,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235441755] [2020-10-12 10:22:15,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 10:22:15,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:22:15,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 10:22:15,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:22:15,548 INFO L87 Difference]: Start difference. First operand 447 states and 566 transitions. Second operand 43 states. [2020-10-12 10:22:16,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:22:16,640 INFO L93 Difference]: Finished difference Result 594 states and 722 transitions. [2020-10-12 10:22:16,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 10:22:16,641 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 326 [2020-10-12 10:22:16,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:22:16,644 INFO L225 Difference]: With dead ends: 594 [2020-10-12 10:22:16,644 INFO L226 Difference]: Without dead ends: 466 [2020-10-12 10:22:16,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 10:22:16,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-10-12 10:22:16,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 458. [2020-10-12 10:22:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-12 10:22:16,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 580 transitions. [2020-10-12 10:22:16,657 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 580 transitions. Word has length 326 [2020-10-12 10:22:16,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:22:16,658 INFO L479 AbstractCegarLoop]: Abstraction has 458 states and 580 transitions. [2020-10-12 10:22:16,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 10:22:16,658 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 580 transitions. [2020-10-12 10:22:16,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-10-12 10:22:16,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:22:16,661 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:22:16,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 10:22:16,661 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:22:16,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:22:16,661 INFO L82 PathProgramCache]: Analyzing trace with hash 536981485, now seen corresponding path program 39 times [2020-10-12 10:22:16,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:22:16,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911997511] [2020-10-12 10:22:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:22:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:16,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:17,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:21,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:21,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 342 [2020-10-12 10:22:21,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:22:21,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 10:22:21,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:21,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 10:22:21,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:22:21,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-12 10:22:21,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:22:22,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:22:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:22,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:22,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:22,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:22:22,799 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:22:22,799 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 10:22:22,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:22,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:22:22,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:22:22,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:22:22,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:22:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2020-10-12 10:22:22,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911997511] [2020-10-12 10:22:22,866 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:22:22,866 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 10:22:22,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184645073] [2020-10-12 10:22:22,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 10:22:22,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:22:22,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 10:22:22,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:22:22,868 INFO L87 Difference]: Start difference. First operand 458 states and 580 transitions. Second operand 44 states. [2020-10-12 10:22:23,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:22:23,956 INFO L93 Difference]: Finished difference Result 608 states and 739 transitions. [2020-10-12 10:22:23,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 10:22:23,957 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 334 [2020-10-12 10:22:23,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:22:23,960 INFO L225 Difference]: With dead ends: 608 [2020-10-12 10:22:23,960 INFO L226 Difference]: Without dead ends: 477 [2020-10-12 10:22:23,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 10:22:23,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2020-10-12 10:22:23,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 469. [2020-10-12 10:22:23,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-12 10:22:23,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 594 transitions. [2020-10-12 10:22:23,973 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 594 transitions. Word has length 334 [2020-10-12 10:22:23,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:22:23,973 INFO L479 AbstractCegarLoop]: Abstraction has 469 states and 594 transitions. [2020-10-12 10:22:23,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 10:22:23,974 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 594 transitions. [2020-10-12 10:22:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-10-12 10:22:23,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:22:23,977 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:22:23,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 10:22:23,977 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:22:23,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:22:23,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1591120105, now seen corresponding path program 40 times [2020-10-12 10:22:23,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:22:23,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532248543] [2020-10-12 10:22:23,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:22:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:24,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:25,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:29,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:29,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 350 [2020-10-12 10:22:29,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:22:29,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-12 10:22:29,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:29,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 10:22:29,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:22:29,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-12 10:22:29,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:22:30,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:22:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:30,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:30,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:30,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:22:30,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:22:30,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:22:30,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:30,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:22:30,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:22:30,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:22:30,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:22:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 6683 backedges. 0 proven. 4141 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2020-10-12 10:22:30,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532248543] [2020-10-12 10:22:30,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:22:30,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 10:22:30,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127249965] [2020-10-12 10:22:30,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 10:22:30,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:22:30,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 10:22:30,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:22:30,300 INFO L87 Difference]: Start difference. First operand 469 states and 594 transitions. Second operand 45 states. [2020-10-12 10:22:31,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:22:31,420 INFO L93 Difference]: Finished difference Result 622 states and 756 transitions. [2020-10-12 10:22:31,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 10:22:31,421 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 342 [2020-10-12 10:22:31,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:22:31,424 INFO L225 Difference]: With dead ends: 622 [2020-10-12 10:22:31,424 INFO L226 Difference]: Without dead ends: 488 [2020-10-12 10:22:31,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 10:22:31,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2020-10-12 10:22:31,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 480. [2020-10-12 10:22:31,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480 states. [2020-10-12 10:22:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 608 transitions. [2020-10-12 10:22:31,439 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 608 transitions. Word has length 342 [2020-10-12 10:22:31,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:22:31,439 INFO L479 AbstractCegarLoop]: Abstraction has 480 states and 608 transitions. [2020-10-12 10:22:31,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 10:22:31,439 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 608 transitions. [2020-10-12 10:22:31,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-10-12 10:22:31,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:22:31,443 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:22:31,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 10:22:31,443 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:22:31,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:22:31,443 INFO L82 PathProgramCache]: Analyzing trace with hash 753421997, now seen corresponding path program 41 times [2020-10-12 10:22:31,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:22:31,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245368644] [2020-10-12 10:22:31,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:22:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:31,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:32,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:36,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:36,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 358 [2020-10-12 10:22:36,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:22:36,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 10:22:36,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:36,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 10:22:36,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 223 [2020-10-12 10:22:36,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-12 10:22:36,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:22:37,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:22:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:37,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:37,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:37,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:22:37,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:22:37,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:22:37,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:37,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:22:37,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:22:37,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:22:37,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:22:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7014 backedges. 0 proven. 2667 refuted. 0 times theorem prover too weak. 4347 trivial. 0 not checked. [2020-10-12 10:22:37,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245368644] [2020-10-12 10:22:37,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:22:37,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 10:22:37,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488454315] [2020-10-12 10:22:37,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 10:22:37,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:22:37,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 10:22:37,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 10:22:37,808 INFO L87 Difference]: Start difference. First operand 480 states and 608 transitions. Second operand 46 states. [2020-10-12 10:22:39,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:22:39,188 INFO L93 Difference]: Finished difference Result 636 states and 773 transitions. [2020-10-12 10:22:39,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 10:22:39,189 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 350 [2020-10-12 10:22:39,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:22:39,192 INFO L225 Difference]: With dead ends: 636 [2020-10-12 10:22:39,192 INFO L226 Difference]: Without dead ends: 499 [2020-10-12 10:22:39,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 10:22:39,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-10-12 10:22:39,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 491. [2020-10-12 10:22:39,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-10-12 10:22:39,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 622 transitions. [2020-10-12 10:22:39,207 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 622 transitions. Word has length 350 [2020-10-12 10:22:39,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:22:39,207 INFO L479 AbstractCegarLoop]: Abstraction has 491 states and 622 transitions. [2020-10-12 10:22:39,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 10:22:39,207 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 622 transitions. [2020-10-12 10:22:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2020-10-12 10:22:39,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:22:39,211 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:22:39,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 10:22:39,211 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:22:39,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:22:39,211 INFO L82 PathProgramCache]: Analyzing trace with hash 311830103, now seen corresponding path program 42 times [2020-10-12 10:22:39,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:22:39,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879619817] [2020-10-12 10:22:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:22:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:39,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:40,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:44,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:44,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 366 [2020-10-12 10:22:44,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:22:44,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:22:44,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:44,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 10:22:44,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:22:44,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-12 10:22:44,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:22:45,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:22:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:45,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:45,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:45,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:22:45,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:22:45,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:22:45,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:22:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:22:45,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:22:45,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:22:45,703 INFO L134 CoverageAnalysis]: Checked inductivity of 7353 backedges. 0 proven. 4558 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2020-10-12 10:22:45,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879619817] [2020-10-12 10:22:45,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:22:45,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 10:22:45,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234942956] [2020-10-12 10:22:45,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 10:22:45,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:22:45,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 10:22:45,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 10:22:45,706 INFO L87 Difference]: Start difference. First operand 491 states and 622 transitions. Second operand 47 states. [2020-10-12 10:22:47,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:22:47,072 INFO L93 Difference]: Finished difference Result 650 states and 790 transitions. [2020-10-12 10:22:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 10:22:47,073 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 358 [2020-10-12 10:22:47,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:22:47,076 INFO L225 Difference]: With dead ends: 650 [2020-10-12 10:22:47,077 INFO L226 Difference]: Without dead ends: 510 [2020-10-12 10:22:47,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 10:22:47,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2020-10-12 10:22:47,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 502. [2020-10-12 10:22:47,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 502 states. [2020-10-12 10:22:47,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 636 transitions. [2020-10-12 10:22:47,089 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 636 transitions. Word has length 358 [2020-10-12 10:22:47,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:22:47,089 INFO L479 AbstractCegarLoop]: Abstraction has 502 states and 636 transitions. [2020-10-12 10:22:47,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 10:22:47,090 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 636 transitions. [2020-10-12 10:22:47,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-10-12 10:22:47,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:22:47,093 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:22:47,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 10:22:47,093 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:22:47,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:22:47,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1485053293, now seen corresponding path program 43 times [2020-10-12 10:22:47,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:22:47,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281001174] [2020-10-12 10:22:47,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:22:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:47,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:48,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:52,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:52,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 374 [2020-10-12 10:22:52,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:22:52,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 10:22:52,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:52,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 10:22:52,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:22:52,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 222 [2020-10-12 10:22:52,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:22:53,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:22:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:53,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:53,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:53,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:22:53,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:22:53,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:22:53,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:53,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:22:53,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:22:53,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:22:53,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:22:53,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7700 backedges. 0 proven. 4774 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2020-10-12 10:22:53,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281001174] [2020-10-12 10:22:53,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:22:53,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 10:22:53,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143000594] [2020-10-12 10:22:53,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 10:22:53,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:22:53,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 10:22:53,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:22:53,597 INFO L87 Difference]: Start difference. First operand 502 states and 636 transitions. Second operand 48 states. [2020-10-12 10:22:54,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:22:54,894 INFO L93 Difference]: Finished difference Result 664 states and 807 transitions. [2020-10-12 10:22:54,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 10:22:54,895 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 366 [2020-10-12 10:22:54,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:22:54,898 INFO L225 Difference]: With dead ends: 664 [2020-10-12 10:22:54,898 INFO L226 Difference]: Without dead ends: 521 [2020-10-12 10:22:54,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 10:22:54,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2020-10-12 10:22:54,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 513. [2020-10-12 10:22:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 513 states. [2020-10-12 10:22:54,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 650 transitions. [2020-10-12 10:22:54,911 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 650 transitions. Word has length 366 [2020-10-12 10:22:54,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:22:54,911 INFO L479 AbstractCegarLoop]: Abstraction has 513 states and 650 transitions. [2020-10-12 10:22:54,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 10:22:54,911 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 650 transitions. [2020-10-12 10:22:54,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-10-12 10:22:54,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:22:54,914 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:22:54,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 10:22:54,914 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:22:54,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:22:54,914 INFO L82 PathProgramCache]: Analyzing trace with hash -475812457, now seen corresponding path program 44 times [2020-10-12 10:22:54,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:22:54,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659671934] [2020-10-12 10:22:54,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:22:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:22:54,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:56,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:22:59,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:22:59,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 382 [2020-10-12 10:22:59,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:22:59,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 10:22:59,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:22:59,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 10:22:59,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 238 [2020-10-12 10:22:59,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-12 10:22:59,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:23:01,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:23:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:23:01,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:01,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:23:01,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:23:01,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:23:01,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:23:01,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:23:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:23:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:23:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:23:01,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:23:01,473 INFO L134 CoverageAnalysis]: Checked inductivity of 8055 backedges. 0 proven. 3060 refuted. 0 times theorem prover too weak. 4995 trivial. 0 not checked. [2020-10-12 10:23:01,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659671934] [2020-10-12 10:23:01,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:23:01,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 10:23:01,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009825661] [2020-10-12 10:23:01,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 10:23:01,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:23:01,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 10:23:01,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 10:23:01,475 INFO L87 Difference]: Start difference. First operand 513 states and 650 transitions. Second operand 49 states. [2020-10-12 10:23:02,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:23:02,875 INFO L93 Difference]: Finished difference Result 678 states and 824 transitions. [2020-10-12 10:23:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 10:23:02,875 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 374 [2020-10-12 10:23:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:23:02,879 INFO L225 Difference]: With dead ends: 678 [2020-10-12 10:23:02,879 INFO L226 Difference]: Without dead ends: 532 [2020-10-12 10:23:02,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 10:23:02,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2020-10-12 10:23:02,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 524. [2020-10-12 10:23:02,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-10-12 10:23:02,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 664 transitions. [2020-10-12 10:23:02,891 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 664 transitions. Word has length 374 [2020-10-12 10:23:02,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:23:02,891 INFO L479 AbstractCegarLoop]: Abstraction has 524 states and 664 transitions. [2020-10-12 10:23:02,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 10:23:02,892 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 664 transitions. [2020-10-12 10:23:02,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2020-10-12 10:23:02,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:23:02,895 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:23:02,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 10:23:02,896 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:23:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:23:02,896 INFO L82 PathProgramCache]: Analyzing trace with hash -609149907, now seen corresponding path program 45 times [2020-10-12 10:23:02,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:23:02,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437126135] [2020-10-12 10:23:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:23:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:23:02,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:04,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:07,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:23:07,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 390 [2020-10-12 10:23:07,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:23:07,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-12 10:23:07,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:23:07,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 10:23:07,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 243 [2020-10-12 10:23:07,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-12 10:23:07,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:23:09,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:23:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:23:09,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:09,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:23:09,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:23:09,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:23:09,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:23:09,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:23:09,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:23:09,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:23:09,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:23:09,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:23:09,533 INFO L134 CoverageAnalysis]: Checked inductivity of 8418 backedges. 0 proven. 3197 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2020-10-12 10:23:09,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437126135] [2020-10-12 10:23:09,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:23:09,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 10:23:09,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300465504] [2020-10-12 10:23:09,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 10:23:09,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:23:09,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 10:23:09,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 10:23:09,535 INFO L87 Difference]: Start difference. First operand 524 states and 664 transitions. Second operand 50 states. [2020-10-12 10:23:11,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 10:23:11,155 INFO L93 Difference]: Finished difference Result 692 states and 841 transitions. [2020-10-12 10:23:11,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 10:23:11,155 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 382 [2020-10-12 10:23:11,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 10:23:11,159 INFO L225 Difference]: With dead ends: 692 [2020-10-12 10:23:11,159 INFO L226 Difference]: Without dead ends: 543 [2020-10-12 10:23:11,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 10:23:11,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2020-10-12 10:23:11,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 535. [2020-10-12 10:23:11,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 535 states. [2020-10-12 10:23:11,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 678 transitions. [2020-10-12 10:23:11,173 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 678 transitions. Word has length 382 [2020-10-12 10:23:11,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 10:23:11,173 INFO L479 AbstractCegarLoop]: Abstraction has 535 states and 678 transitions. [2020-10-12 10:23:11,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 10:23:11,173 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 678 transitions. [2020-10-12 10:23:11,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2020-10-12 10:23:11,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 10:23:11,177 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 10:23:11,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 10:23:11,178 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 10:23:11,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 10:23:11,178 INFO L82 PathProgramCache]: Analyzing trace with hash 368444631, now seen corresponding path program 46 times [2020-10-12 10:23:11,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 10:23:11,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135560920] [2020-10-12 10:23:11,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 10:23:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:23:11,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:13,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:16,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:23:16,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 398 [2020-10-12 10:23:16,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 10:23:16,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 10:23:16,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:23:16,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 10:23:16,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 10:23:16,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 237 [2020-10-12 10:23:16,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:23:17,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 10:23:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 10:23:17,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 10:23:17,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 10:23:17,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 10:23:17,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 10:23:17,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 10:23:17,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 10:23:17,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 10:23:17,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 10:23:17,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 10:23:17,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 10:23:17,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8789 backedges. 0 proven. 5452 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2020-10-12 10:23:17,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135560920] [2020-10-12 10:23:17,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 10:23:17,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 10:23:17,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202985920] [2020-10-12 10:23:17,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 10:23:17,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 10:23:17,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 10:23:17,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 10:23:17,887 INFO L87 Difference]: Start difference. First operand 535 states and 678 transitions. Second operand 51 states.