/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_init5_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:25:17,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:25:17,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:25:17,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:25:17,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:25:17,719 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:25:17,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:25:17,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:25:17,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:25:17,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:25:17,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:25:17,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:25:17,731 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:25:17,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:25:17,734 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:25:17,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:25:17,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:25:17,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:25:17,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:25:17,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:25:17,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:25:17,760 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:25:17,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:25:17,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:25:17,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:25:17,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:25:17,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:25:17,778 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:25:17,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:25:17,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:25:17,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:25:17,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:25:17,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:25:17,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:25:17,786 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:25:17,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:25:17,788 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:25:17,788 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:25:17,789 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:25:17,790 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:25:17,791 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:25:17,792 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 [2020-10-26 19:25:17,846 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:25:17,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:25:17,852 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:25:17,852 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:25:17,852 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:25:17,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:25:17,853 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:25:17,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:25:17,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:25:17,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:25:17,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:25:17,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:25:17,855 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:25:17,855 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:25:17,856 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:25:17,856 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:25:17,856 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:25:17,856 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:25:17,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:25:17,857 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:25:17,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:25:17,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:25:17,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:25:17,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:25:17,858 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:25:17,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:25:17,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:25:17,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:25:17,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:25:17,859 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:25:18,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:25:18,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:25:18,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:25:18,281 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:25:18,282 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:25:18,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2020-10-26 19:25:18,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70649a108/8af83ec89ff44f6996a49fcbe213e3de/FLAG1af6c06e7 [2020-10-26 19:25:19,023 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:25:19,024 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init5_ground-1.i [2020-10-26 19:25:19,032 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70649a108/8af83ec89ff44f6996a49fcbe213e3de/FLAG1af6c06e7 [2020-10-26 19:25:19,373 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70649a108/8af83ec89ff44f6996a49fcbe213e3de [2020-10-26 19:25:19,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:25:19,386 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:25:19,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:19,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:25:19,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:25:19,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:19" (1/1) ... [2020-10-26 19:25:19,401 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@620d0152 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:19, skipping insertion in model container [2020-10-26 19:25:19,401 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:19" (1/1) ... [2020-10-26 19:25:19,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:25:19,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:25:19,628 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:19,638 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:25:19,667 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:19,688 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:25:19,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:19 WrapperNode [2020-10-26 19:25:19,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:19,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:25:19,690 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:25:19,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:25:19,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:19" (1/1) ... [2020-10-26 19:25:19,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:19" (1/1) ... [2020-10-26 19:25:19,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:19" (1/1) ... [2020-10-26 19:25:19,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:19" (1/1) ... [2020-10-26 19:25:19,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:19" (1/1) ... [2020-10-26 19:25:19,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:19" (1/1) ... [2020-10-26 19:25:19,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:19" (1/1) ... [2020-10-26 19:25:19,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:25:19,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:25:19,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:25:19,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:25:19,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:19" (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 [2020-10-26 19:25:19,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:25:19,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:25:19,836 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:25:19,836 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:25:19,836 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:25:19,837 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:25:19,837 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:25:19,837 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:25:19,837 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:25:19,838 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:25:19,839 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:25:19,839 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:25:19,839 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:25:19,839 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:25:19,840 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:25:19,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:25:19,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:25:19,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:25:19,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:25:20,492 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:25:20,493 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-26 19:25:20,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:20 BoogieIcfgContainer [2020-10-26 19:25:20,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:25:20,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:25:20,499 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:25:20,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:25:20,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:25:19" (1/3) ... [2020-10-26 19:25:20,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b40ad15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:20, skipping insertion in model container [2020-10-26 19:25:20,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:19" (2/3) ... [2020-10-26 19:25:20,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b40ad15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:20, skipping insertion in model container [2020-10-26 19:25:20,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:20" (3/3) ... [2020-10-26 19:25:20,529 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init5_ground-1.i [2020-10-26 19:25:20,543 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:25:20,553 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:25:20,604 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:25:20,655 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:25:20,655 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:25:20,655 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:25:20,655 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:25:20,656 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:25:20,656 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:25:20,656 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:25:20,656 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:25:20,679 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-26 19:25:20,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-26 19:25:20,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:20,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:20,696 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:20,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:20,708 INFO L82 PathProgramCache]: Analyzing trace with hash -573516862, now seen corresponding path program 1 times [2020-10-26 19:25:20,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:20,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229282525] [2020-10-26 19:25:20,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:20,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:21,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:21,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:21,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:21,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:21,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:21,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-26 19:25:21,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:25:21,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1105 [2020-10-26 19:25:21,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:21,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:25:21,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:21,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:25:21,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:25:22,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:22,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:22,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:22,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:22,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:22,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:25:22,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:22,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:22,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:22,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:22,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:25:22,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229282525] [2020-10-26 19:25:22,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:25:22,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:25:22,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801162860] [2020-10-26 19:25:22,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:25:22,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:22,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:25:22,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:25:22,134 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 4 states. [2020-10-26 19:25:22,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:22,300 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2020-10-26 19:25:22,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:25:22,303 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2020-10-26 19:25:22,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:22,311 INFO L225 Difference]: With dead ends: 67 [2020-10-26 19:25:22,312 INFO L226 Difference]: Without dead ends: 33 [2020-10-26 19:25:22,316 INFO L677 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 [2020-10-26 19:25:22,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-26 19:25:22,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-26 19:25:22,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-26 19:25:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-10-26 19:25:22,364 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 23 [2020-10-26 19:25:22,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:22,364 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-10-26 19:25:22,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:25:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-10-26 19:25:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:25:22,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:22,366 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:22,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:25:22,367 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:22,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:22,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1849424926, now seen corresponding path program 1 times [2020-10-26 19:25:22,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:22,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910207182] [2020-10-26 19:25:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:22,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:22,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:22,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:22,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:22,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:22,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:23,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:27,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:27,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:25:27,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:25:27,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:25:27,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:27,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:25:27,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:27,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-26 19:25:27,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:27,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:27,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:27,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:27,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:27,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:27,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:25:27,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:27,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:27,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:27,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:27,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:25:27,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910207182] [2020-10-26 19:25:27,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:27,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:25:27,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150597677] [2020-10-26 19:25:27,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:25:27,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:27,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:25:27,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:25:27,465 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 5 states. [2020-10-26 19:25:27,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:27,614 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2020-10-26 19:25:27,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:25:27,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-26 19:25:27,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:27,616 INFO L225 Difference]: With dead ends: 63 [2020-10-26 19:25:27,616 INFO L226 Difference]: Without dead ends: 38 [2020-10-26 19:25:27,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:25:27,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-26 19:25:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-26 19:25:27,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-26 19:25:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-26 19:25:27,628 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 28 [2020-10-26 19:25:27,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:27,629 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-26 19:25:27,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:25:27,629 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-26 19:25:27,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:25:27,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:27,630 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, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:27,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:25:27,631 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:27,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:27,632 INFO L82 PathProgramCache]: Analyzing trace with hash -965935426, now seen corresponding path program 2 times [2020-10-26 19:25:27,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:27,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833012958] [2020-10-26 19:25:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:27,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:27,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:27,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:27,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:27,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:32,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:32,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:25:32,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:25:32,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:25:32,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:32,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:25:32,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:32,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:25:32,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:32,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:32,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:32,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:32,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:32,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:32,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:25:32,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:32,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:32,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:32,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:32,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:25:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:25:32,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833012958] [2020-10-26 19:25:32,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:32,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:25:32,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653364538] [2020-10-26 19:25:32,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:25:32,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:32,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:25:32,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:25:32,784 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 6 states. [2020-10-26 19:25:32,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:32,979 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2020-10-26 19:25:32,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:25:32,979 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-26 19:25:32,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:32,981 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:25:32,981 INFO L226 Difference]: Without dead ends: 43 [2020-10-26 19:25:32,982 INFO L677 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 [2020-10-26 19:25:32,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-26 19:25:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-26 19:25:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-26 19:25:33,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2020-10-26 19:25:33,002 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 33 [2020-10-26 19:25:33,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:33,003 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2020-10-26 19:25:33,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:25:33,003 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2020-10-26 19:25:33,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-26 19:25:33,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:33,007 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:33,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:25:33,007 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:33,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:33,010 INFO L82 PathProgramCache]: Analyzing trace with hash -646170978, now seen corresponding path program 3 times [2020-10-26 19:25:33,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:33,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389117124] [2020-10-26 19:25:33,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:33,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:38,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:38,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-26 19:25:38,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:25:38,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:25:38,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:38,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:25:38,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:38,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:25:38,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:25:38,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:38,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:38,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:38,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:38,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:38,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:25:38,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:38,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:38,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:38,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:38,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-26 19:25:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-26 19:25:38,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389117124] [2020-10-26 19:25:38,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:38,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:25:38,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882483737] [2020-10-26 19:25:38,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:25:38,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:38,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:25:38,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:25:38,195 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand 7 states. [2020-10-26 19:25:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:38,421 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2020-10-26 19:25:38,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:25:38,422 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-26 19:25:38,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:38,423 INFO L225 Difference]: With dead ends: 81 [2020-10-26 19:25:38,423 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:25:38,424 INFO L677 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 [2020-10-26 19:25:38,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:25:38,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-26 19:25:38,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:25:38,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2020-10-26 19:25:38,433 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 38 [2020-10-26 19:25:38,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:38,433 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2020-10-26 19:25:38,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:25:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2020-10-26 19:25:38,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:25:38,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:38,435 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:38,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:25:38,436 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:38,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:38,436 INFO L82 PathProgramCache]: Analyzing trace with hash -2024852802, now seen corresponding path program 4 times [2020-10-26 19:25:38,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:38,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122648394] [2020-10-26 19:25:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:38,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:38,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:38,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:38,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:38,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:43,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:43,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:25:43,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:25:43,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:25:43,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:43,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:25:43,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:43,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:25:43,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:43,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:43,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:43,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:43,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:43,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:43,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:25:43,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:43,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:43,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:43,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:43,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-26 19:25:43,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122648394] [2020-10-26 19:25:43,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:43,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:25:43,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121851249] [2020-10-26 19:25:43,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:25:43,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:43,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:25:43,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:25:43,593 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand 8 states. [2020-10-26 19:25:43,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:43,775 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2020-10-26 19:25:43,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:25:43,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-10-26 19:25:43,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:43,777 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:25:43,777 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:25:43,778 INFO L677 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 [2020-10-26 19:25:43,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:25:43,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-26 19:25:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:25:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2020-10-26 19:25:43,787 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 43 [2020-10-26 19:25:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:43,787 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2020-10-26 19:25:43,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:25:43,788 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2020-10-26 19:25:43,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:25:43,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:43,789 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:43,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:25:43,790 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:43,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:43,790 INFO L82 PathProgramCache]: Analyzing trace with hash -724348642, now seen corresponding path program 5 times [2020-10-26 19:25:43,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:43,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451395146] [2020-10-26 19:25:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:43,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:43,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:43,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:43,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:43,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:44,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:48,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:48,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:25:48,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:25:48,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:25:48,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:48,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:25:48,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:48,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:25:48,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-26 19:25:48,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:48,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:48,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:48,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:48,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:48,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:25:48,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:48,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:48,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:48,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:48,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-10-26 19:25:48,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451395146] [2020-10-26 19:25:48,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:48,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:25:48,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52488400] [2020-10-26 19:25:48,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:25:48,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:48,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:25:48,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:25:48,946 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand 9 states. [2020-10-26 19:25:49,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:49,139 INFO L93 Difference]: Finished difference Result 99 states and 113 transitions. [2020-10-26 19:25:49,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:25:49,147 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-10-26 19:25:49,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:49,148 INFO L225 Difference]: With dead ends: 99 [2020-10-26 19:25:49,149 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:25:49,149 INFO L677 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 [2020-10-26 19:25:49,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:25:49,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-26 19:25:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-26 19:25:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2020-10-26 19:25:49,167 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 48 [2020-10-26 19:25:49,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:49,168 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2020-10-26 19:25:49,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:25:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2020-10-26 19:25:49,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:25:49,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:49,172 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:49,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:25:49,173 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:49,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:49,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1812609346, now seen corresponding path program 6 times [2020-10-26 19:25:49,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:49,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868775548] [2020-10-26 19:25:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:49,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:49,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:49,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:49,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:49,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:54,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:54,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:25:54,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:25:54,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:25:54,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:54,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:25:54,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:54,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:25:54,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:54,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:54,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:54,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:54,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:54,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:54,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:25:54,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:54,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:54,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:54,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:54,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-26 19:25:54,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868775548] [2020-10-26 19:25:54,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:54,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:25:54,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392735117] [2020-10-26 19:25:54,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:25:54,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:54,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:25:54,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:25:54,347 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand 10 states. [2020-10-26 19:25:54,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:54,581 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2020-10-26 19:25:54,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:25:54,582 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-26 19:25:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:54,583 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:25:54,583 INFO L226 Difference]: Without dead ends: 63 [2020-10-26 19:25:54,584 INFO L677 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 [2020-10-26 19:25:54,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-26 19:25:54,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-26 19:25:54,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:25:54,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2020-10-26 19:25:54,593 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 53 [2020-10-26 19:25:54,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:54,593 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2020-10-26 19:25:54,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:25:54,594 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2020-10-26 19:25:54,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:25:54,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:54,595 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:54,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:25:54,595 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:54,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:54,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1607119970, now seen corresponding path program 7 times [2020-10-26 19:25:54,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:54,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784190804] [2020-10-26 19:25:54,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:54,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:54,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:54,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:54,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:55,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:59,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:59,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:25:59,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:25:59,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:25:59,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:59,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:25:59,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:59,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:25:59,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:59,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:59,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:59,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:59,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:59,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:59,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:25:59,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:59,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:59,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:59,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:59,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-26 19:25:59,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784190804] [2020-10-26 19:25:59,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:59,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:25:59,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377203409] [2020-10-26 19:25:59,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:25:59,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:59,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:25:59,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:25:59,768 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 11 states. [2020-10-26 19:26:00,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:00,022 INFO L93 Difference]: Finished difference Result 117 states and 131 transitions. [2020-10-26 19:26:00,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:26:00,023 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 58 [2020-10-26 19:26:00,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:00,024 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:26:00,024 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:26:00,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:26:00,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:26:00,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-10-26 19:26:00,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-26 19:26:00,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2020-10-26 19:26:00,050 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 58 [2020-10-26 19:26:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:00,050 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2020-10-26 19:26:00,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:26:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2020-10-26 19:26:00,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:26:00,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:00,052 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:00,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:26:00,055 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:00,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:00,055 INFO L82 PathProgramCache]: Analyzing trace with hash 2001517246, now seen corresponding path program 8 times [2020-10-26 19:26:00,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:00,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756196250] [2020-10-26 19:26:00,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:00,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:00,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:00,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:00,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:05,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:05,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:26:05,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:05,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:26:05,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:05,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:26:05,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:05,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:26:05,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:05,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:05,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:05,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:05,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:05,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:05,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:05,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:05,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:05,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:05,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:05,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-10-26 19:26:05,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756196250] [2020-10-26 19:26:05,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:05,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:26:05,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438340743] [2020-10-26 19:26:05,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:26:05,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:05,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:26:05,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:26:05,252 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand 12 states. [2020-10-26 19:26:05,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:05,472 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-10-26 19:26:05,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:26:05,472 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 63 [2020-10-26 19:26:05,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:05,473 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:26:05,474 INFO L226 Difference]: Without dead ends: 73 [2020-10-26 19:26:05,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:26:05,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-26 19:26:05,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-26 19:26:05,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:26:05,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2020-10-26 19:26:05,495 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 63 [2020-10-26 19:26:05,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:05,495 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2020-10-26 19:26:05,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:26:05,495 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2020-10-26 19:26:05,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-26 19:26:05,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:05,501 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:05,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:26:05,502 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:05,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:05,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2073437726, now seen corresponding path program 9 times [2020-10-26 19:26:05,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:05,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236739856] [2020-10-26 19:26:05,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:05,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:05,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:05,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:05,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:05,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:10,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:10,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-26 19:26:10,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:10,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:26:10,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:10,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:26:10,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:10,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:26:10,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:10,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:10,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:10,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:10,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:10,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:10,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:10,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:26:10,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:10,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:10,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:10,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:10,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:10,734 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-26 19:26:10,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236739856] [2020-10-26 19:26:10,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:10,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:26:10,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397437019] [2020-10-26 19:26:10,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:26:10,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:10,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:26:10,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:26:10,741 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand 13 states. [2020-10-26 19:26:11,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:11,011 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2020-10-26 19:26:11,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:26:11,011 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 68 [2020-10-26 19:26:11,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:11,012 INFO L225 Difference]: With dead ends: 135 [2020-10-26 19:26:11,012 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:26:11,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:26:11,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:26:11,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-26 19:26:11,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:26:11,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-10-26 19:26:11,030 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 68 [2020-10-26 19:26:11,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:11,031 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-10-26 19:26:11,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:26:11,031 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-10-26 19:26:11,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:26:11,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:11,032 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:11,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:26:11,033 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:11,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:11,033 INFO L82 PathProgramCache]: Analyzing trace with hash 742395582, now seen corresponding path program 10 times [2020-10-26 19:26:11,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:11,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886771823] [2020-10-26 19:26:11,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:11,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:11,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:11,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:11,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:11,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:16,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:16,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:26:16,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:16,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:26:16,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:16,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:26:16,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:16,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:26:16,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:16,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:16,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:16,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:16,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:16,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:16,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:16,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:16,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-26 19:26:16,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886771823] [2020-10-26 19:26:16,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:16,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:26:16,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908153637] [2020-10-26 19:26:16,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:26:16,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:16,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:26:16,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:26:16,236 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 14 states. [2020-10-26 19:26:16,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:16,465 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2020-10-26 19:26:16,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:26:16,466 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-10-26 19:26:16,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:16,467 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:26:16,467 INFO L226 Difference]: Without dead ends: 83 [2020-10-26 19:26:16,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:26:16,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-26 19:26:16,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-26 19:26:16,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:26:16,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2020-10-26 19:26:16,490 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 73 [2020-10-26 19:26:16,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:16,490 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2020-10-26 19:26:16,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:26:16,490 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2020-10-26 19:26:16,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-26 19:26:16,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:16,492 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:16,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:26:16,492 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:16,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:16,493 INFO L82 PathProgramCache]: Analyzing trace with hash -420880226, now seen corresponding path program 11 times [2020-10-26 19:26:16,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:16,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275707955] [2020-10-26 19:26:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:16,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:16,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:16,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:16,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:21,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:21,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-26 19:26:21,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:21,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:26:21,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:21,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:26:21,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:21,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:26:21,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:21,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:21,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:21,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:21,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:21,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:21,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:21,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:21,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:21,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:21,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:21,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:26:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-10-26 19:26:21,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275707955] [2020-10-26 19:26:21,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:21,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:26:21,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079842029] [2020-10-26 19:26:21,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:26:21,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:21,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:26:21,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:26:21,747 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 15 states. [2020-10-26 19:26:22,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:22,029 INFO L93 Difference]: Finished difference Result 153 states and 167 transitions. [2020-10-26 19:26:22,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:26:22,030 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 78 [2020-10-26 19:26:22,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:22,031 INFO L225 Difference]: With dead ends: 153 [2020-10-26 19:26:22,031 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:26:22,031 INFO L677 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 [2020-10-26 19:26:22,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:26:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-10-26 19:26:22,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-26 19:26:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2020-10-26 19:26:22,039 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 78 [2020-10-26 19:26:22,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:22,039 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2020-10-26 19:26:22,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:26:22,039 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2020-10-26 19:26:22,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:26:22,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:22,041 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:22,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:26:22,041 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:22,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:22,042 INFO L82 PathProgramCache]: Analyzing trace with hash -574897474, now seen corresponding path program 12 times [2020-10-26 19:26:22,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:22,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280609305] [2020-10-26 19:26:22,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:22,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:22,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:22,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:22,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:27,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:27,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:26:27,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:27,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:26:27,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:27,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:26:27,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:27,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:26:27,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:27,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:27,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:27,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:27,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:27,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:27,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:27,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:27,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:27,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:27,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:27,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:26:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-10-26 19:26:27,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280609305] [2020-10-26 19:26:27,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:27,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:26:27,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366743288] [2020-10-26 19:26:27,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:26:27,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:27,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:26:27,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:27,373 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand 16 states. [2020-10-26 19:26:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:27,832 INFO L93 Difference]: Finished difference Result 162 states and 176 transitions. [2020-10-26 19:26:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:26:27,833 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 83 [2020-10-26 19:26:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:27,834 INFO L225 Difference]: With dead ends: 162 [2020-10-26 19:26:27,834 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:26:27,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:27,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:26:27,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-26 19:26:27,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:26:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2020-10-26 19:26:27,860 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 83 [2020-10-26 19:26:27,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:27,861 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2020-10-26 19:26:27,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:26:27,861 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2020-10-26 19:26:27,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-26 19:26:27,866 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:27,867 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:27,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:26:27,867 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:27,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:27,870 INFO L82 PathProgramCache]: Analyzing trace with hash -500925666, now seen corresponding path program 13 times [2020-10-26 19:26:27,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:27,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107033248] [2020-10-26 19:26:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:27,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:28,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:28,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:28,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:32,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:32,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-26 19:26:32,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:32,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:26:32,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:32,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:26:32,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:32,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:26:32,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:33,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:33,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:33,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:33,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:33,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:33,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:33,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:33,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:33,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:33,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:33,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-10-26 19:26:33,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107033248] [2020-10-26 19:26:33,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:33,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:26:33,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193013181] [2020-10-26 19:26:33,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:26:33,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:33,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:26:33,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:33,161 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand 17 states. [2020-10-26 19:26:33,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:33,441 INFO L93 Difference]: Finished difference Result 171 states and 185 transitions. [2020-10-26 19:26:33,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:26:33,441 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 88 [2020-10-26 19:26:33,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:33,442 INFO L225 Difference]: With dead ends: 171 [2020-10-26 19:26:33,442 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:26:33,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:33,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:26:33,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-10-26 19:26:33,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-26 19:26:33,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2020-10-26 19:26:33,459 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 88 [2020-10-26 19:26:33,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:33,459 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2020-10-26 19:26:33,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:26:33,459 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2020-10-26 19:26:33,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:26:33,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:33,461 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:33,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:26:33,461 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:33,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:33,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1498687810, now seen corresponding path program 14 times [2020-10-26 19:26:33,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:33,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761551152] [2020-10-26 19:26:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:33,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:33,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:33,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:33,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:33,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:38,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:38,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:26:38,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:38,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:26:38,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:38,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:26:38,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:38,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:26:38,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:38,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:38,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:38,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:38,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:38,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:38,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:38,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:38,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:38,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:38,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:38,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:38,765 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2020-10-26 19:26:38,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761551152] [2020-10-26 19:26:38,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:38,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:26:38,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612797405] [2020-10-26 19:26:38,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:26:38,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:38,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:26:38,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:38,768 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand 18 states. [2020-10-26 19:26:39,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:39,070 INFO L93 Difference]: Finished difference Result 180 states and 194 transitions. [2020-10-26 19:26:39,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:26:39,070 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 93 [2020-10-26 19:26:39,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:39,072 INFO L225 Difference]: With dead ends: 180 [2020-10-26 19:26:39,072 INFO L226 Difference]: Without dead ends: 103 [2020-10-26 19:26:39,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:39,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-26 19:26:39,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-26 19:26:39,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:26:39,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2020-10-26 19:26:39,088 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 93 [2020-10-26 19:26:39,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:39,089 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2020-10-26 19:26:39,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:26:39,089 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2020-10-26 19:26:39,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:26:39,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:39,090 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:39,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:26:39,091 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:39,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:39,091 INFO L82 PathProgramCache]: Analyzing trace with hash 758773150, now seen corresponding path program 15 times [2020-10-26 19:26:39,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:39,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678387546] [2020-10-26 19:26:39,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:39,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:39,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:39,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:39,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:44,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:44,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 19:26:44,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:44,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:26:44,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:44,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:26:44,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:44,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:26:44,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:44,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:44,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:44,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:44,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:44,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:44,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:44,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:44,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:44,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:44,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-10-26 19:26:44,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678387546] [2020-10-26 19:26:44,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:44,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:26:44,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426026063] [2020-10-26 19:26:44,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:26:44,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:44,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:26:44,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:26:44,421 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand 19 states. [2020-10-26 19:26:44,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:44,790 INFO L93 Difference]: Finished difference Result 189 states and 203 transitions. [2020-10-26 19:26:44,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:26:44,791 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-10-26 19:26:44,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:44,792 INFO L225 Difference]: With dead ends: 189 [2020-10-26 19:26:44,792 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:26:44,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:26:44,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:26:44,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-26 19:26:44,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-26 19:26:44,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-10-26 19:26:44,801 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 98 [2020-10-26 19:26:44,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:44,801 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-10-26 19:26:44,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:26:44,801 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-10-26 19:26:44,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-26 19:26:44,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:44,803 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:44,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:26:44,803 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:44,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:44,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1375488702, now seen corresponding path program 16 times [2020-10-26 19:26:44,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:44,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434333232] [2020-10-26 19:26:44,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:44,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:44,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:45,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:45,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:49,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:49,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-26 19:26:49,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:49,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:26:49,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:49,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:26:49,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:49,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:26:49,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:50,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:50,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:50,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:50,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:50,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:50,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:50,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:50,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:50,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:50,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:50,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:50,162 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2020-10-26 19:26:50,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434333232] [2020-10-26 19:26:50,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:50,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:26:50,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979170552] [2020-10-26 19:26:50,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:26:50,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:50,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:26:50,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:26:50,165 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 20 states. [2020-10-26 19:26:50,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:50,544 INFO L93 Difference]: Finished difference Result 198 states and 212 transitions. [2020-10-26 19:26:50,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:26:50,545 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 103 [2020-10-26 19:26:50,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:50,546 INFO L225 Difference]: With dead ends: 198 [2020-10-26 19:26:50,547 INFO L226 Difference]: Without dead ends: 113 [2020-10-26 19:26:50,548 INFO L677 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 [2020-10-26 19:26:50,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-26 19:26:50,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-10-26 19:26:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 19:26:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2020-10-26 19:26:50,556 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 103 [2020-10-26 19:26:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:50,557 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2020-10-26 19:26:50,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:26:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2020-10-26 19:26:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-26 19:26:50,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:50,558 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:50,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:26:50,559 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:50,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:50,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2011279330, now seen corresponding path program 17 times [2020-10-26 19:26:50,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:50,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000320740] [2020-10-26 19:26:50,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:50,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:50,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:50,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:50,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:50,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:55,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:55,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-26 19:26:55,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:55,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:26:55,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:55,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:26:55,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:55,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:26:55,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:55,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:55,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:55,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:55,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:55,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:55,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:55,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:55,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:55,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:55,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:55,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-10-26 19:26:55,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000320740] [2020-10-26 19:26:55,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:55,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:26:55,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386706812] [2020-10-26 19:26:55,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:26:55,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:55,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:26:55,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:26:55,935 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand 21 states. [2020-10-26 19:26:56,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:56,320 INFO L93 Difference]: Finished difference Result 207 states and 221 transitions. [2020-10-26 19:26:56,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:26:56,325 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 108 [2020-10-26 19:26:56,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:56,327 INFO L225 Difference]: With dead ends: 207 [2020-10-26 19:26:56,327 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 19:26:56,328 INFO L677 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 [2020-10-26 19:26:56,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 19:26:56,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-10-26 19:26:56,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:26:56,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 123 transitions. [2020-10-26 19:26:56,340 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 123 transitions. Word has length 108 [2020-10-26 19:26:56,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:56,340 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 123 transitions. [2020-10-26 19:26:56,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:26:56,340 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 123 transitions. [2020-10-26 19:26:56,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-26 19:26:56,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:56,343 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:56,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:26:56,343 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:56,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:56,344 INFO L82 PathProgramCache]: Analyzing trace with hash 446242494, now seen corresponding path program 18 times [2020-10-26 19:26:56,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:56,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879516835] [2020-10-26 19:26:56,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:56,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:56,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:56,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:56,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:01,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:01,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 19:27:01,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:01,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:27:01,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:27:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:01,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:27:01,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:01,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:01,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:01,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:01,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:01,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:01,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:01,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:01,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:01,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:01,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:01,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2020-10-26 19:27:01,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879516835] [2020-10-26 19:27:01,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:01,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:27:01,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134472720] [2020-10-26 19:27:01,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:27:01,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:01,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:27:01,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:27:01,763 INFO L87 Difference]: Start difference. First operand 118 states and 123 transitions. Second operand 22 states. [2020-10-26 19:27:02,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:02,142 INFO L93 Difference]: Finished difference Result 216 states and 230 transitions. [2020-10-26 19:27:02,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:27:02,143 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 113 [2020-10-26 19:27:02,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:02,145 INFO L225 Difference]: With dead ends: 216 [2020-10-26 19:27:02,145 INFO L226 Difference]: Without dead ends: 123 [2020-10-26 19:27:02,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:27:02,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-26 19:27:02,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-26 19:27:02,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-26 19:27:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2020-10-26 19:27:02,154 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 113 [2020-10-26 19:27:02,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:02,154 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2020-10-26 19:27:02,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:27:02,154 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2020-10-26 19:27:02,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-26 19:27:02,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:02,155 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:02,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:27:02,156 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:02,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:02,156 INFO L82 PathProgramCache]: Analyzing trace with hash -221934946, now seen corresponding path program 19 times [2020-10-26 19:27:02,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:02,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272890774] [2020-10-26 19:27:02,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:02,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:02,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:02,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:02,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:07,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:07,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-26 19:27:07,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:07,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:27:07,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:07,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:27:07,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:07,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:27:07,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:07,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:07,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:07,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:07,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:07,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:07,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:27:07,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:07,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:07,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:07,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:07,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-10-26 19:27:07,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272890774] [2020-10-26 19:27:07,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:07,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:27:07,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060224407] [2020-10-26 19:27:07,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:27:07,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:07,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:27:07,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:27:07,584 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand 23 states. [2020-10-26 19:27:07,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:07,906 INFO L93 Difference]: Finished difference Result 225 states and 239 transitions. [2020-10-26 19:27:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:27:07,906 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 118 [2020-10-26 19:27:07,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:07,908 INFO L225 Difference]: With dead ends: 225 [2020-10-26 19:27:07,908 INFO L226 Difference]: Without dead ends: 128 [2020-10-26 19:27:07,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:27:07,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-26 19:27:07,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-10-26 19:27:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-26 19:27:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 133 transitions. [2020-10-26 19:27:07,922 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 133 transitions. Word has length 118 [2020-10-26 19:27:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:07,923 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 133 transitions. [2020-10-26 19:27:07,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:27:07,924 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 133 transitions. [2020-10-26 19:27:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-26 19:27:07,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:07,925 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:07,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:27:07,925 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:07,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1802392254, now seen corresponding path program 20 times [2020-10-26 19:27:07,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:07,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1948141388] [2020-10-26 19:27:07,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:07,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:08,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:08,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:08,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:08,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:12,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:12,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-26 19:27:12,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:12,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:27:12,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:12,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:27:12,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:12,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:27:12,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:13,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:13,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:13,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:13,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:13,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:13,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:13,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:13,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:13,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:13,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:13,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:13,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1050 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2020-10-26 19:27:13,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1948141388] [2020-10-26 19:27:13,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:13,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:27:13,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811101880] [2020-10-26 19:27:13,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:27:13,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:13,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:27:13,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:27:13,386 INFO L87 Difference]: Start difference. First operand 128 states and 133 transitions. Second operand 24 states. [2020-10-26 19:27:13,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:13,870 INFO L93 Difference]: Finished difference Result 234 states and 248 transitions. [2020-10-26 19:27:13,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:27:13,870 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 123 [2020-10-26 19:27:13,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:13,872 INFO L225 Difference]: With dead ends: 234 [2020-10-26 19:27:13,872 INFO L226 Difference]: Without dead ends: 133 [2020-10-26 19:27:13,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:27:13,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-26 19:27:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-26 19:27:13,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-26 19:27:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 138 transitions. [2020-10-26 19:27:13,881 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 138 transitions. Word has length 123 [2020-10-26 19:27:13,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:13,881 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 138 transitions. [2020-10-26 19:27:13,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:27:13,881 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 138 transitions. [2020-10-26 19:27:13,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-26 19:27:13,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:13,882 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:13,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:27:13,883 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:13,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:13,883 INFO L82 PathProgramCache]: Analyzing trace with hash -316431074, now seen corresponding path program 21 times [2020-10-26 19:27:13,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:13,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262436053] [2020-10-26 19:27:13,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:13,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:14,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:14,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:14,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:18,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:18,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-26 19:27:18,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:18,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-26 19:27:18,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:18,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:27:18,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:18,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:27:18,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:19,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:19,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:19,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:19,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:19,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:19,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:19,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:19,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:19,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:19,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:19,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:19,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-10-26 19:27:19,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262436053] [2020-10-26 19:27:19,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:19,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:27:19,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471106480] [2020-10-26 19:27:19,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:27:19,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:19,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:27:19,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:27:19,399 INFO L87 Difference]: Start difference. First operand 133 states and 138 transitions. Second operand 25 states. [2020-10-26 19:27:19,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:19,792 INFO L93 Difference]: Finished difference Result 243 states and 257 transitions. [2020-10-26 19:27:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:27:19,796 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 128 [2020-10-26 19:27:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:19,797 INFO L225 Difference]: With dead ends: 243 [2020-10-26 19:27:19,798 INFO L226 Difference]: Without dead ends: 138 [2020-10-26 19:27:19,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:27:19,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-26 19:27:19,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-26 19:27:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:27:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-10-26 19:27:19,807 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 128 [2020-10-26 19:27:19,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:19,808 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-10-26 19:27:19,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:27:19,808 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-10-26 19:27:19,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-26 19:27:19,809 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:19,809 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:19,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:27:19,809 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:19,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:19,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1620580674, now seen corresponding path program 22 times [2020-10-26 19:27:19,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:19,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910536755] [2020-10-26 19:27:19,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:19,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:19,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:19,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:20,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:20,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:24,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:24,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-26 19:27:24,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:24,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:27:24,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:24,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:27:24,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:24,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:27:24,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:25,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:25,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:25,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:25,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:25,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:25,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:25,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:25,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:25,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:25,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:25,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1265 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2020-10-26 19:27:25,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910536755] [2020-10-26 19:27:25,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:25,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:27:25,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633921438] [2020-10-26 19:27:25,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:27:25,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:25,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:27:25,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:27:25,345 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 26 states. [2020-10-26 19:27:25,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:25,844 INFO L93 Difference]: Finished difference Result 252 states and 266 transitions. [2020-10-26 19:27:25,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:27:25,844 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 133 [2020-10-26 19:27:25,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:25,846 INFO L225 Difference]: With dead ends: 252 [2020-10-26 19:27:25,846 INFO L226 Difference]: Without dead ends: 143 [2020-10-26 19:27:25,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:27:25,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-26 19:27:25,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-26 19:27:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-26 19:27:25,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 148 transitions. [2020-10-26 19:27:25,856 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 148 transitions. Word has length 133 [2020-10-26 19:27:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:25,856 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 148 transitions. [2020-10-26 19:27:25,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:27:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 148 transitions. [2020-10-26 19:27:25,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-26 19:27:25,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:25,857 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:25,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:27:25,858 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:25,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:25,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1221812322, now seen corresponding path program 23 times [2020-10-26 19:27:25,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:25,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964176005] [2020-10-26 19:27:25,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:25,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:26,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:26,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:26,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:30,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:30,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-26 19:27:30,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:30,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:27:30,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:30,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:27:30,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:30,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:27:30,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:31,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:31,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:31,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:31,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:31,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:31,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:31,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:31,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:31,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:31,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:31,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1380 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-10-26 19:27:31,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964176005] [2020-10-26 19:27:31,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:31,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:27:31,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685008110] [2020-10-26 19:27:31,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:27:31,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:31,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:27:31,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:27:31,436 INFO L87 Difference]: Start difference. First operand 143 states and 148 transitions. Second operand 27 states. [2020-10-26 19:27:31,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:31,906 INFO L93 Difference]: Finished difference Result 261 states and 275 transitions. [2020-10-26 19:27:31,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:27:31,907 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 138 [2020-10-26 19:27:31,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:31,909 INFO L225 Difference]: With dead ends: 261 [2020-10-26 19:27:31,909 INFO L226 Difference]: Without dead ends: 148 [2020-10-26 19:27:31,910 INFO L677 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 [2020-10-26 19:27:31,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-26 19:27:31,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2020-10-26 19:27:31,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-26 19:27:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 153 transitions. [2020-10-26 19:27:31,918 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 153 transitions. Word has length 138 [2020-10-26 19:27:31,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:31,918 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 153 transitions. [2020-10-26 19:27:31,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:27:31,919 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 153 transitions. [2020-10-26 19:27:31,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-26 19:27:31,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:31,920 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:31,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:27:31,920 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:31,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:31,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1049503042, now seen corresponding path program 24 times [2020-10-26 19:27:31,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:31,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836884964] [2020-10-26 19:27:31,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:31,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:32,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:32,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:32,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:36,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:36,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-26 19:27:36,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:36,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:27:36,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:36,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:27:36,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:36,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:27:36,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:37,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:37,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:37,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:37,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:37,531 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:37,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:27:37,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:37,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:37,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:37,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:37,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:37,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-10-26 19:27:37,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836884964] [2020-10-26 19:27:37,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:37,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:27:37,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930694654] [2020-10-26 19:27:37,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:27:37,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:37,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:27:37,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:27:37,555 INFO L87 Difference]: Start difference. First operand 148 states and 153 transitions. Second operand 28 states. [2020-10-26 19:27:38,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:38,004 INFO L93 Difference]: Finished difference Result 270 states and 284 transitions. [2020-10-26 19:27:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:27:38,004 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 143 [2020-10-26 19:27:38,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:38,005 INFO L225 Difference]: With dead ends: 270 [2020-10-26 19:27:38,006 INFO L226 Difference]: Without dead ends: 153 [2020-10-26 19:27:38,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:27:38,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-26 19:27:38,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2020-10-26 19:27:38,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-26 19:27:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 158 transitions. [2020-10-26 19:27:38,018 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 158 transitions. Word has length 143 [2020-10-26 19:27:38,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:38,018 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 158 transitions. [2020-10-26 19:27:38,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:27:38,018 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 158 transitions. [2020-10-26 19:27:38,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-26 19:27:38,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:38,020 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:38,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:27:38,021 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:38,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:38,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1865123298, now seen corresponding path program 25 times [2020-10-26 19:27:38,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:38,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970107168] [2020-10-26 19:27:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:38,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:38,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:38,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:38,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:39,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:43,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:43,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-26 19:27:43,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:43,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-26 19:27:43,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:43,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:27:43,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:43,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:27:43,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:43,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:43,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:43,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:43,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:43,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:43,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:43,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:27:43,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:43,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:43,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:43,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:43,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-10-26 19:27:43,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970107168] [2020-10-26 19:27:43,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:43,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:27:43,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691196627] [2020-10-26 19:27:43,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:27:43,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:43,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:27:43,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:27:43,733 INFO L87 Difference]: Start difference. First operand 153 states and 158 transitions. Second operand 29 states. [2020-10-26 19:27:44,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:44,236 INFO L93 Difference]: Finished difference Result 279 states and 293 transitions. [2020-10-26 19:27:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:27:44,236 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 148 [2020-10-26 19:27:44,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:44,238 INFO L225 Difference]: With dead ends: 279 [2020-10-26 19:27:44,238 INFO L226 Difference]: Without dead ends: 158 [2020-10-26 19:27:44,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:27:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-26 19:27:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2020-10-26 19:27:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-26 19:27:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 163 transitions. [2020-10-26 19:27:44,248 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 163 transitions. Word has length 148 [2020-10-26 19:27:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:44,248 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 163 transitions. [2020-10-26 19:27:44,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:27:44,248 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 163 transitions. [2020-10-26 19:27:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-26 19:27:44,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:44,250 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:44,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:27:44,251 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:44,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:44,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1282944702, now seen corresponding path program 26 times [2020-10-26 19:27:44,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:44,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456751463] [2020-10-26 19:27:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:44,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:44,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:44,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:45,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:49,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:49,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-26 19:27:49,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:49,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:27:49,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:49,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:27:49,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:49,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:27:49,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:50,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:50,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:50,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:50,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:50,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:50,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:27:50,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:50,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:50,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:50,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:50,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:50,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1755 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-10-26 19:27:50,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456751463] [2020-10-26 19:27:50,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:50,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:27:50,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422698714] [2020-10-26 19:27:50,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:27:50,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:50,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:27:50,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:27:50,162 INFO L87 Difference]: Start difference. First operand 158 states and 163 transitions. Second operand 30 states. [2020-10-26 19:27:50,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:50,685 INFO L93 Difference]: Finished difference Result 288 states and 302 transitions. [2020-10-26 19:27:50,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:27:50,685 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 153 [2020-10-26 19:27:50,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:50,687 INFO L225 Difference]: With dead ends: 288 [2020-10-26 19:27:50,687 INFO L226 Difference]: Without dead ends: 163 [2020-10-26 19:27:50,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:27:50,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-26 19:27:50,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2020-10-26 19:27:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-26 19:27:50,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 168 transitions. [2020-10-26 19:27:50,696 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 168 transitions. Word has length 153 [2020-10-26 19:27:50,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:50,697 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 168 transitions. [2020-10-26 19:27:50,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:27:50,697 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 168 transitions. [2020-10-26 19:27:50,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-26 19:27:50,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:50,698 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:50,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:27:50,698 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:50,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:50,699 INFO L82 PathProgramCache]: Analyzing trace with hash -99666786, now seen corresponding path program 27 times [2020-10-26 19:27:50,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:50,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472461354] [2020-10-26 19:27:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:50,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:50,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:50,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:51,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:52,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:55,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:55,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-26 19:27:55,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:55,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:27:55,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:55,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:27:55,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:55,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:27:55,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:56,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:56,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:56,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:56,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:56,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:56,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:56,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:56,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:56,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:56,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:56,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-10-26 19:27:56,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472461354] [2020-10-26 19:27:56,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:56,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:27:56,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730858758] [2020-10-26 19:27:56,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:27:56,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:56,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:27:56,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:27:56,412 INFO L87 Difference]: Start difference. First operand 163 states and 168 transitions. Second operand 31 states. [2020-10-26 19:27:56,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:56,976 INFO L93 Difference]: Finished difference Result 297 states and 311 transitions. [2020-10-26 19:27:56,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:27:56,977 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 158 [2020-10-26 19:27:56,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:56,979 INFO L225 Difference]: With dead ends: 297 [2020-10-26 19:27:56,979 INFO L226 Difference]: Without dead ends: 168 [2020-10-26 19:27:56,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:27:56,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-26 19:27:56,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-10-26 19:27:56,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-26 19:27:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-10-26 19:27:56,987 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 158 [2020-10-26 19:27:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:56,988 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-10-26 19:27:56,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:27:56,988 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-10-26 19:27:56,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-26 19:27:56,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:56,989 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:56,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:27:56,989 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:56,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:56,990 INFO L82 PathProgramCache]: Analyzing trace with hash -345578818, now seen corresponding path program 28 times [2020-10-26 19:27:56,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:56,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524754676] [2020-10-26 19:27:56,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:57,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:57,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:57,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:58,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:02,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:02,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-26 19:28:02,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:02,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:28:02,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:02,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:28:02,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:02,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:28:02,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:02,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:02,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:02,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:02,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:02,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:02,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:02,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:02,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:02,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:02,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:02,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2030 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2020-10-26 19:28:02,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524754676] [2020-10-26 19:28:02,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:02,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:28:02,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203716464] [2020-10-26 19:28:02,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:28:02,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:02,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:28:02,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:28:02,784 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 32 states. [2020-10-26 19:28:03,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:03,345 INFO L93 Difference]: Finished difference Result 306 states and 320 transitions. [2020-10-26 19:28:03,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:28:03,345 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 163 [2020-10-26 19:28:03,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:03,347 INFO L225 Difference]: With dead ends: 306 [2020-10-26 19:28:03,347 INFO L226 Difference]: Without dead ends: 173 [2020-10-26 19:28:03,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:28:03,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-26 19:28:03,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2020-10-26 19:28:03,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-26 19:28:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 178 transitions. [2020-10-26 19:28:03,358 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 178 transitions. Word has length 163 [2020-10-26 19:28:03,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:03,358 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 178 transitions. [2020-10-26 19:28:03,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:28:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 178 transitions. [2020-10-26 19:28:03,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-26 19:28:03,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:03,359 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:03,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:28:03,360 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:03,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:03,360 INFO L82 PathProgramCache]: Analyzing trace with hash -221196514, now seen corresponding path program 29 times [2020-10-26 19:28:03,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:03,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675494122] [2020-10-26 19:28:03,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:03,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:03,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:03,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:05,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:08,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:08,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-26 19:28:08,439 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:08,439 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:28:08,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:08,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:28:08,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:08,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:28:08,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:09,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:09,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:09,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:09,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:09,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:09,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:09,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:09,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:09,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:09,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:09,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:09,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2175 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-10-26 19:28:09,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675494122] [2020-10-26 19:28:09,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:09,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:28:09,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063608381] [2020-10-26 19:28:09,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:28:09,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:09,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:28:09,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:28:09,210 INFO L87 Difference]: Start difference. First operand 173 states and 178 transitions. Second operand 33 states. [2020-10-26 19:28:09,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:09,722 INFO L93 Difference]: Finished difference Result 315 states and 329 transitions. [2020-10-26 19:28:09,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:28:09,723 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 168 [2020-10-26 19:28:09,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:09,725 INFO L225 Difference]: With dead ends: 315 [2020-10-26 19:28:09,725 INFO L226 Difference]: Without dead ends: 178 [2020-10-26 19:28:09,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:28:09,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-26 19:28:09,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2020-10-26 19:28:09,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-26 19:28:09,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 183 transitions. [2020-10-26 19:28:09,734 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 183 transitions. Word has length 168 [2020-10-26 19:28:09,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:09,734 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 183 transitions. [2020-10-26 19:28:09,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:28:09,735 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 183 transitions. [2020-10-26 19:28:09,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-26 19:28:09,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:09,736 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:09,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:28:09,736 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:09,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:09,737 INFO L82 PathProgramCache]: Analyzing trace with hash 959051454, now seen corresponding path program 30 times [2020-10-26 19:28:09,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:09,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438947927] [2020-10-26 19:28:09,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:09,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:09,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:10,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:11,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:14,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:14,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 183 [2020-10-26 19:28:14,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:14,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:28:14,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:14,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:28:14,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:14,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:28:14,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:15,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:15,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:15,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:15,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:15,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:15,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:15,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:15,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:15,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:15,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:15,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2325 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-10-26 19:28:15,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438947927] [2020-10-26 19:28:15,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:15,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:28:15,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290802974] [2020-10-26 19:28:15,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:28:15,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:15,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:28:15,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:28:15,644 INFO L87 Difference]: Start difference. First operand 178 states and 183 transitions. Second operand 34 states. [2020-10-26 19:28:16,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:16,260 INFO L93 Difference]: Finished difference Result 324 states and 338 transitions. [2020-10-26 19:28:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:28:16,261 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 173 [2020-10-26 19:28:16,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:16,263 INFO L225 Difference]: With dead ends: 324 [2020-10-26 19:28:16,263 INFO L226 Difference]: Without dead ends: 183 [2020-10-26 19:28:16,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:28:16,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-26 19:28:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2020-10-26 19:28:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-26 19:28:16,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 188 transitions. [2020-10-26 19:28:16,272 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 188 transitions. Word has length 173 [2020-10-26 19:28:16,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:16,272 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 188 transitions. [2020-10-26 19:28:16,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:28:16,273 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 188 transitions. [2020-10-26 19:28:16,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-26 19:28:16,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:16,274 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:16,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:28:16,274 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:16,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:16,275 INFO L82 PathProgramCache]: Analyzing trace with hash 990726558, now seen corresponding path program 31 times [2020-10-26 19:28:16,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:16,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622039680] [2020-10-26 19:28:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:16,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:16,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:16,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:18,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:21,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:21,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-26 19:28:21,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:21,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-26 19:28:21,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:21,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:28:21,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:21,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:28:21,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:22,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:22,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:22,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:22,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:22,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:22,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:22,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:22,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:22,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:22,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:22,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2480 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-10-26 19:28:22,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622039680] [2020-10-26 19:28:22,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:22,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:28:22,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792872834] [2020-10-26 19:28:22,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:28:22,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:22,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:28:22,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:28:22,230 INFO L87 Difference]: Start difference. First operand 183 states and 188 transitions. Second operand 35 states. [2020-10-26 19:28:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:22,824 INFO L93 Difference]: Finished difference Result 333 states and 347 transitions. [2020-10-26 19:28:22,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:28:22,826 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 178 [2020-10-26 19:28:22,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:22,828 INFO L225 Difference]: With dead ends: 333 [2020-10-26 19:28:22,828 INFO L226 Difference]: Without dead ends: 188 [2020-10-26 19:28:22,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:28:22,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-26 19:28:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2020-10-26 19:28:22,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-26 19:28:22,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 193 transitions. [2020-10-26 19:28:22,837 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 193 transitions. Word has length 178 [2020-10-26 19:28:22,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:22,837 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 193 transitions. [2020-10-26 19:28:22,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:28:22,838 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 193 transitions. [2020-10-26 19:28:22,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-26 19:28:22,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:22,839 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:22,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:28:22,839 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:22,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:22,840 INFO L82 PathProgramCache]: Analyzing trace with hash -2136118594, now seen corresponding path program 32 times [2020-10-26 19:28:22,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:22,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542083311] [2020-10-26 19:28:22,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:22,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:22,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:23,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:23,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:24,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:27,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:27,941 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-26 19:28:27,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:27,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-26 19:28:27,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:27,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:28:27,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:27,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:28:27,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:28,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:28,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:28,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:28,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:28,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:28,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:28,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:28,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:28,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:28,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:28,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2640 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2020-10-26 19:28:28,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542083311] [2020-10-26 19:28:28,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:28,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:28:28,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980709462] [2020-10-26 19:28:28,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:28:28,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:28,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:28:28,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:28:28,877 INFO L87 Difference]: Start difference. First operand 188 states and 193 transitions. Second operand 36 states. [2020-10-26 19:28:29,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:29,531 INFO L93 Difference]: Finished difference Result 342 states and 356 transitions. [2020-10-26 19:28:29,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:28:29,532 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 183 [2020-10-26 19:28:29,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:29,533 INFO L225 Difference]: With dead ends: 342 [2020-10-26 19:28:29,534 INFO L226 Difference]: Without dead ends: 193 [2020-10-26 19:28:29,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:28:29,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-26 19:28:29,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2020-10-26 19:28:29,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-26 19:28:29,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 198 transitions. [2020-10-26 19:28:29,546 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 198 transitions. Word has length 183 [2020-10-26 19:28:29,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:29,547 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 198 transitions. [2020-10-26 19:28:29,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:28:29,547 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 198 transitions. [2020-10-26 19:28:29,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-26 19:28:29,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:29,549 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:29,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:28:29,550 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:29,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:29,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1833393122, now seen corresponding path program 33 times [2020-10-26 19:28:29,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:29,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594583300] [2020-10-26 19:28:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:29,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:29,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:29,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:30,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:31,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:34,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:34,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-26 19:28:34,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:34,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:28:34,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:34,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:28:34,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:34,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:28:34,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:35,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:35,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:35,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:35,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:35,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:35,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:35,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:35,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:35,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:35,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:35,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:35,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2805 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-10-26 19:28:35,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594583300] [2020-10-26 19:28:35,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:35,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:28:35,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096310571] [2020-10-26 19:28:35,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:28:35,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:35,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:28:35,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:28:35,626 INFO L87 Difference]: Start difference. First operand 193 states and 198 transitions. Second operand 37 states. [2020-10-26 19:28:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:36,244 INFO L93 Difference]: Finished difference Result 351 states and 365 transitions. [2020-10-26 19:28:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:28:36,245 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 188 [2020-10-26 19:28:36,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:36,247 INFO L225 Difference]: With dead ends: 351 [2020-10-26 19:28:36,248 INFO L226 Difference]: Without dead ends: 198 [2020-10-26 19:28:36,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:28:36,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-26 19:28:36,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-10-26 19:28:36,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-26 19:28:36,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2020-10-26 19:28:36,256 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 188 [2020-10-26 19:28:36,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:36,256 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2020-10-26 19:28:36,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:28:36,257 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2020-10-26 19:28:36,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-26 19:28:36,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:36,258 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:36,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:28:36,258 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:36,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:36,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2094874302, now seen corresponding path program 34 times [2020-10-26 19:28:36,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:36,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514196404] [2020-10-26 19:28:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:36,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:36,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:36,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:36,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:38,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:41,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:41,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-26 19:28:41,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:41,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-26 19:28:41,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:41,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:28:41,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:41,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:28:41,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:42,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:42,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:42,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:42,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:42,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:42,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:42,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:42,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:42,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:42,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:42,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-10-26 19:28:42,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514196404] [2020-10-26 19:28:42,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:42,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:28:42,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113487247] [2020-10-26 19:28:42,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:28:42,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:42,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:28:42,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:28:42,379 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand 38 states. [2020-10-26 19:28:43,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:43,119 INFO L93 Difference]: Finished difference Result 360 states and 374 transitions. [2020-10-26 19:28:43,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:28:43,120 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 193 [2020-10-26 19:28:43,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:43,121 INFO L225 Difference]: With dead ends: 360 [2020-10-26 19:28:43,122 INFO L226 Difference]: Without dead ends: 203 [2020-10-26 19:28:43,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:28:43,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-26 19:28:43,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2020-10-26 19:28:43,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-26 19:28:43,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 208 transitions. [2020-10-26 19:28:43,129 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 208 transitions. Word has length 193 [2020-10-26 19:28:43,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:43,129 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 208 transitions. [2020-10-26 19:28:43,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:28:43,129 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 208 transitions. [2020-10-26 19:28:43,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-10-26 19:28:43,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:43,131 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:43,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:28:43,131 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:43,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:43,132 INFO L82 PathProgramCache]: Analyzing trace with hash -104407394, now seen corresponding path program 35 times [2020-10-26 19:28:43,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:43,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905564719] [2020-10-26 19:28:43,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:43,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:43,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:43,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:45,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:48,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:48,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-26 19:28:48,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:48,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-26 19:28:48,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:48,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:28:48,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:48,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:28:48,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:49,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:49,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:49,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:49,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:49,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:49,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:49,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:49,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:49,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:49,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:49,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:49,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3150 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2020-10-26 19:28:49,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905564719] [2020-10-26 19:28:49,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:49,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:28:49,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174009632] [2020-10-26 19:28:49,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:28:49,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:49,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:28:49,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:28:49,332 INFO L87 Difference]: Start difference. First operand 203 states and 208 transitions. Second operand 39 states. [2020-10-26 19:28:49,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:49,936 INFO L93 Difference]: Finished difference Result 369 states and 383 transitions. [2020-10-26 19:28:49,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:28:49,937 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 198 [2020-10-26 19:28:49,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:49,938 INFO L225 Difference]: With dead ends: 369 [2020-10-26 19:28:49,939 INFO L226 Difference]: Without dead ends: 208 [2020-10-26 19:28:49,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:28:49,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-26 19:28:49,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2020-10-26 19:28:49,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-26 19:28:49,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 213 transitions. [2020-10-26 19:28:49,948 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 213 transitions. Word has length 198 [2020-10-26 19:28:49,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:49,948 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 213 transitions. [2020-10-26 19:28:49,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:28:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 213 transitions. [2020-10-26 19:28:49,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-26 19:28:49,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:49,950 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:49,950 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:28:49,950 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:49,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:49,950 INFO L82 PathProgramCache]: Analyzing trace with hash 413495998, now seen corresponding path program 36 times [2020-10-26 19:28:49,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:49,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702448260] [2020-10-26 19:28:49,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:50,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:50,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:50,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:52,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:55,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:55,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-26 19:28:55,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:55,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-26 19:28:55,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:55,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:28:55,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:55,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:28:55,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:56,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:56,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:56,153 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:56,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:56,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:56,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:56,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:56,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:56,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:56,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:56,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3330 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2020-10-26 19:28:56,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702448260] [2020-10-26 19:28:56,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:56,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:28:56,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677460119] [2020-10-26 19:28:56,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:28:56,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:56,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:28:56,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:28:56,181 INFO L87 Difference]: Start difference. First operand 208 states and 213 transitions. Second operand 40 states. [2020-10-26 19:28:56,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:56,828 INFO L93 Difference]: Finished difference Result 378 states and 392 transitions. [2020-10-26 19:28:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:28:56,828 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 203 [2020-10-26 19:28:56,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:56,830 INFO L225 Difference]: With dead ends: 378 [2020-10-26 19:28:56,830 INFO L226 Difference]: Without dead ends: 213 [2020-10-26 19:28:56,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:28:56,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-26 19:28:56,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2020-10-26 19:28:56,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-26 19:28:56,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 218 transitions. [2020-10-26 19:28:56,840 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 218 transitions. Word has length 203 [2020-10-26 19:28:56,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:56,841 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 218 transitions. [2020-10-26 19:28:56,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:28:56,841 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 218 transitions. [2020-10-26 19:28:56,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-26 19:28:56,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:56,842 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:56,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:28:56,842 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:56,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:56,843 INFO L82 PathProgramCache]: Analyzing trace with hash -265553634, now seen corresponding path program 37 times [2020-10-26 19:28:56,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:56,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233502249] [2020-10-26 19:28:56,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:56,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:57,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:57,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:59,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:01,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:01,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-26 19:29:01,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:29:01,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:29:01,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:01,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:29:01,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:01,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:29:01,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:03,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:03,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:03,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:03,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:03,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:03,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:03,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:03,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:03,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:03,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:03,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:03,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 3515 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-10-26 19:29:03,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233502249] [2020-10-26 19:29:03,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:03,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:29:03,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887312961] [2020-10-26 19:29:03,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:29:03,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:03,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:29:03,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:29:03,143 INFO L87 Difference]: Start difference. First operand 213 states and 218 transitions. Second operand 41 states. [2020-10-26 19:29:03,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:03,920 INFO L93 Difference]: Finished difference Result 387 states and 401 transitions. [2020-10-26 19:29:03,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:29:03,921 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 208 [2020-10-26 19:29:03,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:03,924 INFO L225 Difference]: With dead ends: 387 [2020-10-26 19:29:03,924 INFO L226 Difference]: Without dead ends: 218 [2020-10-26 19:29:03,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:29:03,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-26 19:29:03,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2020-10-26 19:29:03,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-26 19:29:03,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 223 transitions. [2020-10-26 19:29:03,933 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 223 transitions. Word has length 208 [2020-10-26 19:29:03,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:03,933 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 223 transitions. [2020-10-26 19:29:03,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:29:03,933 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 223 transitions. [2020-10-26 19:29:03,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-26 19:29:03,934 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:03,935 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:03,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:29:03,935 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:03,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:03,936 INFO L82 PathProgramCache]: Analyzing trace with hash 787613374, now seen corresponding path program 38 times [2020-10-26 19:29:03,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:03,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537339531] [2020-10-26 19:29:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:04,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:04,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:04,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:07,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:09,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:09,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 223 [2020-10-26 19:29:09,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:29:09,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:29:09,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:09,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:29:09,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:09,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:29:09,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:10,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:10,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:10,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:10,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:10,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:10,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:10,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:10,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:10,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:10,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:10,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3705 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2020-10-26 19:29:10,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537339531] [2020-10-26 19:29:10,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:10,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:29:10,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85248420] [2020-10-26 19:29:10,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:29:10,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:10,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:29:10,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:29:10,300 INFO L87 Difference]: Start difference. First operand 218 states and 223 transitions. Second operand 42 states. [2020-10-26 19:29:11,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:11,147 INFO L93 Difference]: Finished difference Result 396 states and 410 transitions. [2020-10-26 19:29:11,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:29:11,148 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 213 [2020-10-26 19:29:11,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:11,150 INFO L225 Difference]: With dead ends: 396 [2020-10-26 19:29:11,150 INFO L226 Difference]: Without dead ends: 223 [2020-10-26 19:29:11,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:29:11,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-26 19:29:11,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 223. [2020-10-26 19:29:11,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-26 19:29:11,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 228 transitions. [2020-10-26 19:29:11,160 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 228 transitions. Word has length 213 [2020-10-26 19:29:11,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:11,160 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 228 transitions. [2020-10-26 19:29:11,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:29:11,161 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 228 transitions. [2020-10-26 19:29:11,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-10-26 19:29:11,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:11,162 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:11,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:29:11,162 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:11,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:11,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1243876450, now seen corresponding path program 39 times [2020-10-26 19:29:11,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:11,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517947259] [2020-10-26 19:29:11,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:11,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:11,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:11,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:14,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:16,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:16,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 228 [2020-10-26 19:29:16,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:29:16,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-26 19:29:16,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:16,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:29:16,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:16,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-26 19:29:16,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0