/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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-fpi/s4lif.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:18:42,642 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:18:42,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:18:42,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:18:42,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:18:42,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:18:42,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:18:42,702 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:18:42,704 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:18:42,706 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:18:42,708 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:18:42,710 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:18:42,710 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:18:42,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:18:42,714 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:18:42,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:18:42,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:18:42,718 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:18:42,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:18:42,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:18:42,726 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:18:42,728 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:18:42,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:18:42,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:18:42,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:18:42,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:18:42,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:18:42,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:18:42,755 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:18:42,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:18:42,757 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:18:42,758 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:18:42,759 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:18:42,760 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:18:42,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:18:42,763 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:18:42,763 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:18:42,764 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:18:42,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:18:42,766 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:18:42,767 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:18:42,768 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 [2020-10-28 09:18:42,799 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:18:42,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:18:42,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:18:42,802 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:18:42,802 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:18:42,803 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:18:42,803 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:18:42,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:18:42,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:18:42,804 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:18:42,804 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:18:42,804 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:18:42,804 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:18:42,805 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:18:42,805 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:18:42,805 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:18:42,805 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:18:42,806 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:18:42,806 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:18:42,806 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:18:42,806 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:18:42,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:18:42,807 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:18:42,807 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:18:42,807 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:18:42,807 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:18:42,808 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:18:42,808 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:18:42,808 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:18:42,808 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:18:43,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:18:43,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:18:43,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:18:43,271 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:18:43,272 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:18:43,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4lif.c [2020-10-28 09:18:43,378 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b652fe2f3/846e454f8df047b7ab071cc8b3d6401a/FLAG14ac04eb8 [2020-10-28 09:18:44,113 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:18:44,114 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/s4lif.c [2020-10-28 09:18:44,124 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b652fe2f3/846e454f8df047b7ab071cc8b3d6401a/FLAG14ac04eb8 [2020-10-28 09:18:44,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b652fe2f3/846e454f8df047b7ab071cc8b3d6401a [2020-10-28 09:18:44,491 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:18:44,500 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:18:44,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:18:44,505 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:18:44,509 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:18:44,511 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:18:44" (1/1) ... [2020-10-28 09:18:44,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5166461a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:44, skipping insertion in model container [2020-10-28 09:18:44,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:18:44" (1/1) ... [2020-10-28 09:18:44,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:18:44,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:18:44,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:18:44,819 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:18:44,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:18:44,866 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:18:44,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:44 WrapperNode [2020-10-28 09:18:44,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:18:44,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:18:44,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:18:44,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:18:44,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:44" (1/1) ... [2020-10-28 09:18:44,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:44" (1/1) ... [2020-10-28 09:18:44,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:44" (1/1) ... [2020-10-28 09:18:44,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:44" (1/1) ... [2020-10-28 09:18:44,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:44" (1/1) ... [2020-10-28 09:18:44,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:44" (1/1) ... [2020-10-28 09:18:44,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:44" (1/1) ... [2020-10-28 09:18:44,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:18:44,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:18:44,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:18:44,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:18:44,924 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:44" (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 [2020-10-28 09:18:45,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:18:45,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:18:45,026 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:18:45,026 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 09:18:45,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:18:45,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:18:45,026 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:18:45,027 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:18:45,027 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:18:45,027 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:18:45,027 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 09:18:45,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:18:45,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:18:45,028 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 09:18:45,028 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:18:45,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 09:18:45,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:18:45,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:18:45,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:18:45,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:18:45,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:18:45,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:18:45,447 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:18:45,447 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-28 09:18:45,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:18:45 BoogieIcfgContainer [2020-10-28 09:18:45,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:18:45,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:18:45,452 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:18:45,455 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:18:45,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:18:44" (1/3) ... [2020-10-28 09:18:45,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2877b94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:18:45, skipping insertion in model container [2020-10-28 09:18:45,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:18:44" (2/3) ... [2020-10-28 09:18:45,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2877b94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:18:45, skipping insertion in model container [2020-10-28 09:18:45,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:18:45" (3/3) ... [2020-10-28 09:18:45,460 INFO L111 eAbstractionObserver]: Analyzing ICFG s4lif.c [2020-10-28 09:18:45,474 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:18:45,480 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:18:45,497 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:18:45,528 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:18:45,529 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:18:45,529 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:18:45,529 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:18:45,529 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:18:45,529 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:18:45,529 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:18:45,529 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:18:45,552 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-28 09:18:45,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 09:18:45,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:45,560 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] [2020-10-28 09:18:45,561 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:45,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:45,568 INFO L82 PathProgramCache]: Analyzing trace with hash 371341983, now seen corresponding path program 1 times [2020-10-28 09:18:45,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:45,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114402456] [2020-10-28 09:18:45,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:45,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:45,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:45,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:46,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:46,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:46,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 09:18:46,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:18:46,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1037 [2020-10-28 09:18:46,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:46,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:46,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:46,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 09:18:46,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:46,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 09:18:46,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:46,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:46,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:46,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:46,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:46,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:46,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 09:18:46,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:46,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:46,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:46,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:46,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:46,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:46,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:46,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:46,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:46,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:46,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:46,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:18:46,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:46,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:46,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:46,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 09:18:46,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:46,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:18:46,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114402456] [2020-10-28 09:18:46,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:18:46,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:18:46,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734234305] [2020-10-28 09:18:46,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:18:46,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:46,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:18:46,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:18:46,991 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-10-28 09:18:47,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:47,182 INFO L93 Difference]: Finished difference Result 65 states and 83 transitions. [2020-10-28 09:18:47,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:18:47,184 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-10-28 09:18:47,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:47,194 INFO L225 Difference]: With dead ends: 65 [2020-10-28 09:18:47,195 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 09:18:47,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:18:47,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 09:18:47,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 09:18:47,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 09:18:47,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-28 09:18:47,272 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2020-10-28 09:18:47,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:47,273 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-28 09:18:47,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:18:47,273 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-28 09:18:47,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 09:18:47,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:47,275 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] [2020-10-28 09:18:47,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:18:47,276 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:47,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:47,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1793608214, now seen corresponding path program 1 times [2020-10-28 09:18:47,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:47,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619685651] [2020-10-28 09:18:47,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:47,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:47,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:47,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:47,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:47,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 09:18:47,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:18:47,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-10-28 09:18:47,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:47,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:18:47,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:18:47,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:18:47,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-28 09:18:47,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:47,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:47,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:47,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:47,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:47,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 09:18:47,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:47,990 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:47,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:47,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:47,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:47,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:47,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:48,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:48,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:48,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:48,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:48,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 09:18:48,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:48,018 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:48,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:18:48,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:48,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:18:48,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:18:48,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619685651] [2020-10-28 09:18:48,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:18:48,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:18:48,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580676297] [2020-10-28 09:18:48,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:18:48,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:48,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:18:48,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:18:48,036 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 5 states. [2020-10-28 09:18:48,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:48,356 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-28 09:18:48,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:18:48,357 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-28 09:18:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:48,358 INFO L225 Difference]: With dead ends: 46 [2020-10-28 09:18:48,358 INFO L226 Difference]: Without dead ends: 32 [2020-10-28 09:18:48,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:18:48,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-28 09:18:48,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-28 09:18:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 09:18:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-28 09:18:48,378 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-10-28 09:18:48,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:48,380 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-28 09:18:48,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:18:48,381 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-28 09:18:48,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:18:48,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:48,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:48,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:18:48,383 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:48,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:48,384 INFO L82 PathProgramCache]: Analyzing trace with hash -2090381425, now seen corresponding path program 1 times [2020-10-28 09:18:48,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:48,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450537786] [2020-10-28 09:18:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:48,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:48,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:48,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:48,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:49,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:49,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:49,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:49,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:50,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:52,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:52,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:18:52,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:18:52,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3645 [2020-10-28 09:18:52,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:52,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:52,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:18:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:52,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:18:52,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:52,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:52,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:52,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:52,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:52,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:52,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:52,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:18:52,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:52,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:52,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:52,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:52,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:52,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:52,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:52,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:52,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:52,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:52,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:52,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:18:52,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:52,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:52,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:52,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:52,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:52,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:18:52,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450537786] [2020-10-28 09:18:52,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:52,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:18:52,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76259607] [2020-10-28 09:18:52,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:18:52,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:52,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:18:52,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:18:52,742 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 14 states. [2020-10-28 09:18:53,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:53,479 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-10-28 09:18:53,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:18:53,482 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2020-10-28 09:18:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:53,489 INFO L225 Difference]: With dead ends: 49 [2020-10-28 09:18:53,489 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 09:18:53,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:18:53,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 09:18:53,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-10-28 09:18:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 09:18:53,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2020-10-28 09:18:53,511 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 31 [2020-10-28 09:18:53,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:53,513 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2020-10-28 09:18:53,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:18:53,513 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2020-10-28 09:18:53,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:18:53,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:53,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:53,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:18:53,517 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:53,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:53,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1617779857, now seen corresponding path program 1 times [2020-10-28 09:18:53,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:53,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775847665] [2020-10-28 09:18:53,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:53,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:53,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:53,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:54,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:54,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:54,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 09:18:54,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:18:54,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1429 [2020-10-28 09:18:54,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:54,979 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:54,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:18:54,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:18:54,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:18:54,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:55,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:55,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:55,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:55,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:55,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:55,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:18:55,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:55,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:55,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:55,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:55,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:55,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:55,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:55,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:55,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:55,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:55,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:55,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:18:55,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:55,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:55,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:55,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:55,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:55,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:18:55,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775847665] [2020-10-28 09:18:55,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:55,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:18:55,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563728185] [2020-10-28 09:18:55,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:18:55,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:55,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:18:55,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:18:55,126 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand 9 states. [2020-10-28 09:18:55,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:55,395 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-28 09:18:55,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:18:55,395 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-28 09:18:55,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:55,397 INFO L225 Difference]: With dead ends: 52 [2020-10-28 09:18:55,397 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 09:18:55,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:18:55,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 09:18:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-28 09:18:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 09:18:55,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-28 09:18:55,408 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 31 [2020-10-28 09:18:55,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:55,408 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-28 09:18:55,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:18:55,408 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-28 09:18:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 09:18:55,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:55,410 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:18:55,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:18:55,410 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:55,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:55,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1912294515, now seen corresponding path program 2 times [2020-10-28 09:18:55,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:55,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863844691] [2020-10-28 09:18:55,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:55,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:55,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:56,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:56,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 09:18:56,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:18:56,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 835 [2020-10-28 09:18:56,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:56,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:56,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:18:56,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:18:56,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 09:18:56,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:56,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:18:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:56,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:56,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:56,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:18:56,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:56,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:18:56,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:56,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:56,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:56,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:56,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:56,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:18:56,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:18:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:56,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:56,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:18:56,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:18:56,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:18:56,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:18:56,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:18:56,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:18:56,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:18:56,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:18:56,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:18:56,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:18:56,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:18:56,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863844691] [2020-10-28 09:18:56,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:18:56,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:18:56,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288784375] [2020-10-28 09:18:56,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:18:56,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:18:56,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:18:56,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:18:56,392 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2020-10-28 09:18:56,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:18:56,679 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2020-10-28 09:18:56,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:18:56,679 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-28 09:18:56,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:18:56,681 INFO L225 Difference]: With dead ends: 85 [2020-10-28 09:18:56,681 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 09:18:56,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:18:56,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 09:18:56,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2020-10-28 09:18:56,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-28 09:18:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-10-28 09:18:56,691 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 33 [2020-10-28 09:18:56,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:18:56,692 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-10-28 09:18:56,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:18:56,692 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-10-28 09:18:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 09:18:56,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:18:56,693 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, 1, 1, 1] [2020-10-28 09:18:56,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:18:56,694 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:18:56,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:18:56,694 INFO L82 PathProgramCache]: Analyzing trace with hash 820807280, now seen corresponding path program 3 times [2020-10-28 09:18:56,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:18:56,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357461631] [2020-10-28 09:18:56,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:18:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:18:56,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:56,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:56,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:57,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:57,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:57,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:57,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:58,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:58,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:18:58,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:01,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:01,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 09:19:01,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:19:01,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4907 [2020-10-28 09:19:01,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:01,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:19:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:01,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:19:01,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:01,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:01,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:01,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:01,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:01,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:01,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:19:01,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:01,721 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:01,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:01,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:01,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:01,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:01,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:01,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:01,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:01,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:01,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:01,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:19:01,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:01,733 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:01,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:01,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:01,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:01,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 09:19:01,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357461631] [2020-10-28 09:19:01,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:01,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:19:01,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154903010] [2020-10-28 09:19:01,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:19:01,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:01,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:19:01,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:19:01,751 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 8 states. [2020-10-28 09:19:02,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:02,037 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-28 09:19:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:19:02,039 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-28 09:19:02,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:02,040 INFO L225 Difference]: With dead ends: 51 [2020-10-28 09:19:02,040 INFO L226 Difference]: Without dead ends: 44 [2020-10-28 09:19:02,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:19:02,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-28 09:19:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-28 09:19:02,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 09:19:02,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-10-28 09:19:02,056 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 36 [2020-10-28 09:19:02,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:02,057 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-10-28 09:19:02,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:19:02,057 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-10-28 09:19:02,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 09:19:02,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:02,061 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:02,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:19:02,064 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:02,064 INFO L82 PathProgramCache]: Analyzing trace with hash -283658706, now seen corresponding path program 4 times [2020-10-28 09:19:02,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:02,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812022713] [2020-10-28 09:19:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:02,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:02,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:02,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:02,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:03,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:03,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:04,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:04,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:05,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:05,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:06,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:07,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:07,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:07,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:19:07,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 09:19:07,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5115 [2020-10-28 09:19:07,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:07,220 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:07,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:19:07,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:07,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:19:07,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:08,357 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-28 09:19:08,547 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2020-10-28 09:19:08,727 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-28 09:19:08,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:08,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:08,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:08,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:08,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:08,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:19:08,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:08,980 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:08,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:08,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:08,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:08,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:08,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:08,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:08,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:08,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:08,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:08,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:19:08,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:08,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:08,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:08,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:08,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:08,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:09,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812022713] [2020-10-28 09:19:09,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:09,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:19:09,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382292774] [2020-10-28 09:19:09,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:19:09,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:09,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:19:09,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:19:09,008 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 20 states. [2020-10-28 09:19:10,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:10,101 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-10-28 09:19:10,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:19:10,102 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 38 [2020-10-28 09:19:10,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:10,104 INFO L225 Difference]: With dead ends: 61 [2020-10-28 09:19:10,104 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 09:19:10,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:19:10,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 09:19:10,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-28 09:19:10,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:19:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-28 09:19:10,115 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 38 [2020-10-28 09:19:10,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:10,115 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-28 09:19:10,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:19:10,116 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-28 09:19:10,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 09:19:10,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:10,117 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:10,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:19:10,117 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:10,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:10,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1563522384, now seen corresponding path program 1 times [2020-10-28 09:19:10,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:10,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57605971] [2020-10-28 09:19:10,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:10,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:10,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:10,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:10,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:11,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:12,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:13,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:14,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:14,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:19:14,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:19:14,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4070 [2020-10-28 09:19:14,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:14,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:14,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:19:14,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:19:14,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:19:14,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:14,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:14,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:14,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:14,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:14,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:14,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:14,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:14,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:14,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:14,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:14,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:14,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:14,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:14,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:14,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:14,507 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:14,507 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:14,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:14,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:14,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:14,508 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:14,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:14,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:14,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:14,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:14,514 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 09:19:14,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57605971] [2020-10-28 09:19:14,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:14,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:19:14,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18011165] [2020-10-28 09:19:14,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:19:14,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:14,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:19:14,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:19:14,517 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 13 states. [2020-10-28 09:19:15,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:15,406 INFO L93 Difference]: Finished difference Result 76 states and 86 transitions. [2020-10-28 09:19:15,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:19:15,412 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-28 09:19:15,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:15,413 INFO L225 Difference]: With dead ends: 76 [2020-10-28 09:19:15,413 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 09:19:15,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:19:15,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 09:19:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 54. [2020-10-28 09:19:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 09:19:15,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-10-28 09:19:15,438 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 38 [2020-10-28 09:19:15,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:15,439 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-10-28 09:19:15,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:19:15,439 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-10-28 09:19:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 09:19:15,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:15,443 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:15,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:19:15,443 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:15,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:15,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2017163884, now seen corresponding path program 2 times [2020-10-28 09:19:15,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:15,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502920819] [2020-10-28 09:19:15,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:15,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:15,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:15,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:15,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:16,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:16,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:19,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:19,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 09:19:19,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:19:19,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3594 [2020-10-28 09:19:19,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:19,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:19,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:19:19,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:19,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:19:19,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:19,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:19,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:19,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:19,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:19,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:19,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:19:19,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:19,242 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:19,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:19,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:19,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:19,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:19,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:19,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:19,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:19,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:19,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:19,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:19,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:19,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:19,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:19,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:19,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:19,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:19,254 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 09:19:19,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502920819] [2020-10-28 09:19:19,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:19,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:19:19,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534529288] [2020-10-28 09:19:19,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:19:19,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:19,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:19:19,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:19:19,264 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 7 states. [2020-10-28 09:19:19,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:19,397 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-10-28 09:19:19,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:19:19,398 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-28 09:19:19,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:19,399 INFO L225 Difference]: With dead ends: 76 [2020-10-28 09:19:19,399 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 09:19:19,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:19:19,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 09:19:19,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-28 09:19:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:19:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2020-10-28 09:19:19,419 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 38 [2020-10-28 09:19:19,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:19,420 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2020-10-28 09:19:19,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:19:19,420 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2020-10-28 09:19:19,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 09:19:19,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:19,421 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:19,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:19:19,424 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:19,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:19,425 INFO L82 PathProgramCache]: Analyzing trace with hash -818549140, now seen corresponding path program 5 times [2020-10-28 09:19:19,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:19,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157445876] [2020-10-28 09:19:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:19,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:19,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:20,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:20,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 09:19:20,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:19:20,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1048 [2020-10-28 09:19:20,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:20,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:20,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:19:20,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:20,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:19:20,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:20,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:20,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:20,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:20,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:20,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:20,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:20,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:20,582 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:20,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:20,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:20,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:20,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:20,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:20,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:20,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:20,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:20,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:20,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:20,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:20,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:20,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:20,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:20,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:20,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 09:19:20,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157445876] [2020-10-28 09:19:20,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:20,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:19:20,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160597537] [2020-10-28 09:19:20,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:19:20,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:20,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:19:20,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:19:20,596 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand 10 states. [2020-10-28 09:19:20,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:20,901 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2020-10-28 09:19:20,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:19:20,902 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-28 09:19:20,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:20,903 INFO L225 Difference]: With dead ends: 108 [2020-10-28 09:19:20,903 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 09:19:20,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:19:20,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 09:19:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-28 09:19:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 09:19:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2020-10-28 09:19:20,927 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 40 [2020-10-28 09:19:20,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:20,928 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2020-10-28 09:19:20,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:19:20,928 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2020-10-28 09:19:20,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 09:19:20,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:20,929 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:20,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:19:20,929 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:20,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:20,930 INFO L82 PathProgramCache]: Analyzing trace with hash 451576945, now seen corresponding path program 6 times [2020-10-28 09:19:20,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:20,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204169793] [2020-10-28 09:19:20,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:20,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:20,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:21,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:21,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:21,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:21,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:21,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:21,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:21,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:21,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:22,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:22,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:22,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:23,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:23,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:23,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:23,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:25,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:25,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:25,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:25,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 09:19:25,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 09:19:25,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 09:19:25,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:25,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:25,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:19:25,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:25,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 09:19:25,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:26,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:26,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:26,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:26,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:26,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:26,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:26,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:26,112 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:26,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:26,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:26,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:26,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:26,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:26,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:26,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:26,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:26,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:26,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:26,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:26,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:26,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:26,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:26,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:26,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:19:26,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204169793] [2020-10-28 09:19:26,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:26,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:19:26,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403247443] [2020-10-28 09:19:26,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:19:26,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:26,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:19:26,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:19:26,126 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand 10 states. [2020-10-28 09:19:26,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:26,476 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-28 09:19:26,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:19:26,477 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-10-28 09:19:26,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:26,478 INFO L225 Difference]: With dead ends: 64 [2020-10-28 09:19:26,478 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 09:19:26,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:19:26,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 09:19:26,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 46. [2020-10-28 09:19:26,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 09:19:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-28 09:19:26,500 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 43 [2020-10-28 09:19:26,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:26,500 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-28 09:19:26,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:19:26,501 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-28 09:19:26,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:19:26,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:26,501 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:26,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:19:26,502 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:26,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:26,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1368274927, now seen corresponding path program 7 times [2020-10-28 09:19:26,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:26,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341918612] [2020-10-28 09:19:26,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:26,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:26,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:27,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:27,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:28,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:28,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:28,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:30,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:30,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:31,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:31,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:31,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:31,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:19:31,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 09:19:31,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:19:31,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:31,529 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:31,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:19:31,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:31,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 09:19:31,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:31,847 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-28 09:19:32,554 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-28 09:19:32,691 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2020-10-28 09:19:32,863 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-28 09:19:33,398 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-28 09:19:34,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:34,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:34,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:34,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:34,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:34,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:34,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:34,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:34,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:34,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:34,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:34,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:34,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:34,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:34,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:34,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:34,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:34,168 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:34,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:34,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:34,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:34,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:34,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 09:19:34,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341918612] [2020-10-28 09:19:34,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:34,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:19:34,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992141296] [2020-10-28 09:19:34,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:19:34,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:34,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:19:34,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:19:34,199 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 26 states. [2020-10-28 09:19:34,805 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 43 [2020-10-28 09:19:35,491 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 52 [2020-10-28 09:19:35,904 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-10-28 09:19:36,074 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 73 [2020-10-28 09:19:36,366 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 66 [2020-10-28 09:19:36,602 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-10-28 09:19:36,959 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-28 09:19:37,457 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2020-10-28 09:19:37,657 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-10-28 09:19:38,014 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 71 [2020-10-28 09:19:38,306 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 60 [2020-10-28 09:19:38,710 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 93 [2020-10-28 09:19:39,046 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-10-28 09:19:39,232 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2020-10-28 09:19:39,597 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 76 [2020-10-28 09:19:39,816 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-28 09:19:40,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:40,137 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2020-10-28 09:19:40,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:19:40,137 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 45 [2020-10-28 09:19:40,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:40,139 INFO L225 Difference]: With dead ends: 69 [2020-10-28 09:19:40,139 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 09:19:40,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=400, Invalid=2356, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 09:19:40,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 09:19:40,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-10-28 09:19:40,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 09:19:40,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-10-28 09:19:40,154 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 45 [2020-10-28 09:19:40,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:40,154 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-10-28 09:19:40,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:19:40,154 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-10-28 09:19:40,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:19:40,155 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:40,155 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:40,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:19:40,156 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:40,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:40,156 INFO L82 PathProgramCache]: Analyzing trace with hash -220072975, now seen corresponding path program 3 times [2020-10-28 09:19:40,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:40,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656907957] [2020-10-28 09:19:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:40,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:40,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:40,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:40,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:40,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:41,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:41,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:42,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:42,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:43,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:44,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:44,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:45,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:45,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:19:45,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 09:19:45,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:19:45,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:45,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:45,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:19:45,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:45,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:19:45,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:45,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:45,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:45,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:45,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:45,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:45,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:45,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:45,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:45,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:45,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:45,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:45,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:45,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:45,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:45,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:45,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:45,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:45,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:45,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:45,652 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:45,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:45,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:45,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:45,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:45,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656907957] [2020-10-28 09:19:45,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:45,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:19:45,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292061229] [2020-10-28 09:19:45,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:19:45,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:45,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:19:45,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:19:45,665 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 17 states. [2020-10-28 09:19:47,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:47,031 INFO L93 Difference]: Finished difference Result 108 states and 123 transitions. [2020-10-28 09:19:47,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:19:47,033 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-28 09:19:47,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:47,035 INFO L225 Difference]: With dead ends: 108 [2020-10-28 09:19:47,035 INFO L226 Difference]: Without dead ends: 93 [2020-10-28 09:19:47,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=290, Invalid=1116, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:19:47,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-28 09:19:47,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-28 09:19:47,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 09:19:47,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-10-28 09:19:47,052 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 45 [2020-10-28 09:19:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:47,052 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-10-28 09:19:47,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:19:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-10-28 09:19:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:19:47,052 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:47,053 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:47,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:19:47,053 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:47,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:47,053 INFO L82 PathProgramCache]: Analyzing trace with hash 550626477, now seen corresponding path program 4 times [2020-10-28 09:19:47,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:47,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209244838] [2020-10-28 09:19:47,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:47,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:47,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:47,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:47,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:48,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:48,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:48,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:48,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:50,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:50,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:51,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:51,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:51,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:52,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:52,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:19:52,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:19:52,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:19:52,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:52,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:52,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:19:52,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:52,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:19:52,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:52,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:52,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:52,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:52,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:52,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:52,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:19:52,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:52,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:52,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:52,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:52,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:52,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:52,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:52,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:52,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:52,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:52,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:52,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:52,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:52,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:52,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:52,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:52,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:52,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:19:52,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209244838] [2020-10-28 09:19:52,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:52,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:19:52,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414069447] [2020-10-28 09:19:52,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:19:52,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:52,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:19:52,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:19:52,555 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 16 states. [2020-10-28 09:19:52,990 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2020-10-28 09:19:53,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:53,481 INFO L93 Difference]: Finished difference Result 107 states and 124 transitions. [2020-10-28 09:19:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:19:53,482 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-28 09:19:53,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:53,484 INFO L225 Difference]: With dead ends: 107 [2020-10-28 09:19:53,484 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 09:19:53,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:19:53,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 09:19:53,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 76. [2020-10-28 09:19:53,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 09:19:53,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2020-10-28 09:19:53,510 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 45 [2020-10-28 09:19:53,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:53,512 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2020-10-28 09:19:53,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:19:53,512 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2020-10-28 09:19:53,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 09:19:53,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:53,513 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:53,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:19:53,513 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:53,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:53,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1069730410, now seen corresponding path program 8 times [2020-10-28 09:19:53,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:53,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404994650] [2020-10-28 09:19:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:53,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:54,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:54,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:54,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:54,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:54,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:54,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:56,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:56,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:56,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:56,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:57,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:57,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:57,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:57,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:57,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:58,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 09:19:58,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-28 09:19:58,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:19:58,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:58,536 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:58,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:19:58,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 09:19:58,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:19:58,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:58,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:58,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:58,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:58,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:58,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:58,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:19:58,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:58,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:58,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:58,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:58,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:58,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:58,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:58,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:58,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:58,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:58,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:58,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:58,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:58,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:58,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:58,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:58,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:58,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:19:58,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404994650] [2020-10-28 09:19:58,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:58,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:19:58,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592178920] [2020-10-28 09:19:58,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:19:58,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:58,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:19:58,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:19:58,683 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 12 states. [2020-10-28 09:19:59,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:59,273 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2020-10-28 09:19:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:19:59,274 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-28 09:19:59,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:59,275 INFO L225 Difference]: With dead ends: 115 [2020-10-28 09:19:59,275 INFO L226 Difference]: Without dead ends: 108 [2020-10-28 09:19:59,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:19:59,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-28 09:19:59,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 54. [2020-10-28 09:19:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 09:19:59,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-28 09:19:59,287 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 48 [2020-10-28 09:19:59,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:59,287 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-28 09:19:59,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:19:59,287 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-28 09:19:59,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 09:19:59,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:59,288 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:19:59,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:19:59,288 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:59,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:59,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1586699352, now seen corresponding path program 9 times [2020-10-28 09:19:59,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:59,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297917537] [2020-10-28 09:19:59,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:59,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:59,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:59,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:59,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:59,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:59,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:59,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:01,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:01,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:02,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:02,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:02,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:02,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:02,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:04,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 09:20:04,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 09:20:04,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:20:04,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:04,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:04,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:20:04,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:04,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:20:04,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:04,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:04,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:04,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:04,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:04,457 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:04,457 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:04,458 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:04,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:04,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:04,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:04,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:20:04,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:04,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:04,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,465 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:04,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:04,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:04,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:04,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:04,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:04,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:04,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:04,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:04,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 09:20:04,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297917537] [2020-10-28 09:20:04,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:04,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:20:04,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829874402] [2020-10-28 09:20:04,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:20:04,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:04,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:20:04,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:20:04,485 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 12 states. [2020-10-28 09:20:05,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:05,006 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2020-10-28 09:20:05,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:20:05,007 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 50 [2020-10-28 09:20:05,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:05,009 INFO L225 Difference]: With dead ends: 111 [2020-10-28 09:20:05,009 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 09:20:05,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:20:05,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 09:20:05,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2020-10-28 09:20:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-28 09:20:05,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-10-28 09:20:05,031 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 50 [2020-10-28 09:20:05,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:05,031 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-10-28 09:20:05,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:20:05,031 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-10-28 09:20:05,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:20:05,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:05,033 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:05,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:20:05,034 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:05,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:05,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1179539386, now seen corresponding path program 10 times [2020-10-28 09:20:05,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:05,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780397287] [2020-10-28 09:20:05,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:05,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:05,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:05,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:06,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:06,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:07,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:07,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:08,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:09,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:09,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:09,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:10,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:10,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:20:10,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:20:10,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5052 [2020-10-28 09:20:10,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:10,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:10,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:20:10,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:10,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 09:20:10,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:11,250 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2020-10-28 09:20:11,576 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-28 09:20:11,895 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-28 09:20:13,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:13,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:13,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:13,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:13,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:13,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:13,712 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:13,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:13,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:13,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:13,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:13,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:13,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:13,717 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:13,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:13,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:13,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:13,717 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:13,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:13,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:13,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:13,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:13,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780397287] [2020-10-28 09:20:13,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:13,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:20:13,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40231782] [2020-10-28 09:20:13,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:20:13,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:13,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:20:13,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:20:13,754 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 33 states. [2020-10-28 09:20:14,214 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 36 [2020-10-28 09:20:15,273 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 34 [2020-10-28 09:20:15,690 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 44 [2020-10-28 09:20:15,942 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-28 09:20:16,184 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 46 [2020-10-28 09:20:16,473 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 48 [2020-10-28 09:20:16,842 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-28 09:20:17,263 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 64 [2020-10-28 09:20:18,211 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 67 [2020-10-28 09:20:19,414 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-10-28 09:20:19,707 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-28 09:20:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:20,044 INFO L93 Difference]: Finished difference Result 96 states and 109 transitions. [2020-10-28 09:20:20,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 09:20:20,046 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 52 [2020-10-28 09:20:20,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:20,047 INFO L225 Difference]: With dead ends: 96 [2020-10-28 09:20:20,047 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 09:20:20,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=264, Invalid=3276, Unknown=0, NotChecked=0, Total=3540 [2020-10-28 09:20:20,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 09:20:20,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2020-10-28 09:20:20,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 09:20:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 86 transitions. [2020-10-28 09:20:20,064 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 86 transitions. Word has length 52 [2020-10-28 09:20:20,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:20,064 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 86 transitions. [2020-10-28 09:20:20,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:20:20,064 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 86 transitions. [2020-10-28 09:20:20,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:20:20,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:20,065 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:20,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:20:20,065 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:20,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:20,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1426484168, now seen corresponding path program 5 times [2020-10-28 09:20:20,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:20,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429591178] [2020-10-28 09:20:20,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:20,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:20,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:20,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:20,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:20,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:20,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:20,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:20,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:20,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:21,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:21,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:22,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:24,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:24,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:25,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:25,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:20:25,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 09:20:25,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:20:25,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:25,088 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:25,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:20:25,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:25,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:20:25,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:25,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:25,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:25,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:25,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:25,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:25,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:20:25,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:25,527 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:25,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:25,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:25,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:25,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:25,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:25,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:25,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:25,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:25,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:25,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:25,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:25,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:25,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:25,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:25,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:25,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:25,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429591178] [2020-10-28 09:20:25,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:25,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:20:25,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202697518] [2020-10-28 09:20:25,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:20:25,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:25,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:20:25,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:20:25,549 INFO L87 Difference]: Start difference. First operand 75 states and 86 transitions. Second operand 21 states. [2020-10-28 09:20:26,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:26,872 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2020-10-28 09:20:26,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:20:26,873 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-10-28 09:20:26,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:26,875 INFO L225 Difference]: With dead ends: 146 [2020-10-28 09:20:26,875 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 09:20:26,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:20:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 09:20:26,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 92. [2020-10-28 09:20:26,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 09:20:26,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2020-10-28 09:20:26,893 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 52 [2020-10-28 09:20:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:26,893 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2020-10-28 09:20:26,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:20:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2020-10-28 09:20:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:20:26,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:26,894 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:26,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:20:26,894 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:26,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:26,895 INFO L82 PathProgramCache]: Analyzing trace with hash -960684668, now seen corresponding path program 6 times [2020-10-28 09:20:26,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:26,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1539735500] [2020-10-28 09:20:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:26,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:26,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:27,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:27,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:27,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:27,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:28,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:28,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:29,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:29,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:30,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:30,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:30,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:31,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:31,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:20:31,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:20:31,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:20:31,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:31,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:31,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:20:31,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 09:20:31,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:20:31,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:32,305 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-10-28 09:20:32,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:32,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:32,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:32,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:32,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:32,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:20:32,693 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:32,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:32,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:32,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:32,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:32,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:32,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:32,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:32,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:32,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:32,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:32,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:32,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:32,698 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:32,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:32,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:32,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:32,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 09:20:32,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1539735500] [2020-10-28 09:20:32,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:32,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:20:32,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987258032] [2020-10-28 09:20:32,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:20:32,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:32,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:20:32,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:20:32,713 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand 18 states. [2020-10-28 09:20:33,235 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2020-10-28 09:20:34,089 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-28 09:20:34,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:34,740 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2020-10-28 09:20:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:20:34,741 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 52 [2020-10-28 09:20:34,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:34,743 INFO L225 Difference]: With dead ends: 141 [2020-10-28 09:20:34,743 INFO L226 Difference]: Without dead ends: 134 [2020-10-28 09:20:34,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:20:34,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-28 09:20:34,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 89. [2020-10-28 09:20:34,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 09:20:34,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 105 transitions. [2020-10-28 09:20:34,772 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 105 transitions. Word has length 52 [2020-10-28 09:20:34,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:34,773 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 105 transitions. [2020-10-28 09:20:34,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:20:34,773 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 105 transitions. [2020-10-28 09:20:34,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 09:20:34,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:34,780 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:34,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:20:34,781 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:34,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:34,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1038990776, now seen corresponding path program 7 times [2020-10-28 09:20:34,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:34,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77189034] [2020-10-28 09:20:34,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:34,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:34,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:34,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:35,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:35,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:36,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:37,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:38,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:38,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:38,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:38,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:39,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:39,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:39,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:39,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:39,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 09:20:39,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:20:39,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:20:39,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:39,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:39,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:20:39,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 09:20:39,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:20:39,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:40,061 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-28 09:20:40,314 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2020-10-28 09:20:40,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:40,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:40,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:40,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:40,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:40,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:40,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:40,674 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:40,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:40,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:40,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:40,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:40,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:40,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:40,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:40,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:40,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:40,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:40,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:40,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:40,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:40,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:40,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:40,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-28 09:20:40,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77189034] [2020-10-28 09:20:40,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:40,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:20:40,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092923290] [2020-10-28 09:20:40,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:20:40,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:40,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:20:40,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:20:40,690 INFO L87 Difference]: Start difference. First operand 89 states and 105 transitions. Second operand 17 states. [2020-10-28 09:20:41,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:41,844 INFO L93 Difference]: Finished difference Result 124 states and 145 transitions. [2020-10-28 09:20:41,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:20:41,848 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-10-28 09:20:41,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:41,849 INFO L225 Difference]: With dead ends: 124 [2020-10-28 09:20:41,850 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 09:20:41,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:20:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 09:20:41,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2020-10-28 09:20:41,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-28 09:20:41,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 109 transitions. [2020-10-28 09:20:41,869 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 109 transitions. Word has length 52 [2020-10-28 09:20:41,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:41,869 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 109 transitions. [2020-10-28 09:20:41,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:20:41,869 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 109 transitions. [2020-10-28 09:20:41,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 09:20:41,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:41,870 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:41,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:20:41,870 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:41,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:41,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1528543876, now seen corresponding path program 11 times [2020-10-28 09:20:41,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:41,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542880259] [2020-10-28 09:20:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:41,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:41,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:44,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:44,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 09:20:44,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:20:44,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2699 [2020-10-28 09:20:44,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:44,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:44,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:20:44,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:44,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:20:44,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:44,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:44,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:44,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:44,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:44,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:44,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:44,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:44,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:44,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:44,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:44,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:44,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:44,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:44,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:44,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:44,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:44,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:44,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:20:44,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:44,758 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:44,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:44,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:44,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:44,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 09:20:44,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542880259] [2020-10-28 09:20:44,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:44,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:20:44,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093521993] [2020-10-28 09:20:44,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:20:44,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:44,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:20:44,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:20:44,764 INFO L87 Difference]: Start difference. First operand 92 states and 109 transitions. Second operand 14 states. [2020-10-28 09:20:45,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:45,302 INFO L93 Difference]: Finished difference Result 155 states and 181 transitions. [2020-10-28 09:20:45,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:20:45,303 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-28 09:20:45,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:45,304 INFO L225 Difference]: With dead ends: 155 [2020-10-28 09:20:45,304 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 09:20:45,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:20:45,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 09:20:45,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-28 09:20:45,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 09:20:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-10-28 09:20:45,319 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 54 [2020-10-28 09:20:45,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:45,319 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-10-28 09:20:45,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:20:45,319 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-10-28 09:20:45,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:20:45,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:45,320 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:45,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:20:45,320 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:45,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:45,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1364016719, now seen corresponding path program 12 times [2020-10-28 09:20:45,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:45,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827792862] [2020-10-28 09:20:45,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:45,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:45,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:46,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:46,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:47,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:48,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:49,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:50,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:50,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:20:50,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:20:50,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:20:50,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:50,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:50,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 09:20:50,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:50,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 09:20:50,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:50,990 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2020-10-28 09:20:51,125 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2020-10-28 09:20:51,334 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 50 [2020-10-28 09:20:51,577 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 53 [2020-10-28 09:20:51,753 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 44 [2020-10-28 09:20:51,981 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 54 [2020-10-28 09:20:52,241 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-28 09:20:52,445 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-28 09:20:52,705 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-10-28 09:20:53,004 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 66 [2020-10-28 09:20:53,213 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 56 [2020-10-28 09:20:53,367 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-28 09:20:55,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:55,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:55,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:55,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:55,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:55,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:55,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:55,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:55,387 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:55,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:55,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:55,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:55,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:55,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:55,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:55,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:55,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:55,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:55,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:55,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:55,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:55,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:55,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:55,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:55,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:20:55,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827792862] [2020-10-28 09:20:55,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:55,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 09:20:55,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781265212] [2020-10-28 09:20:55,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 09:20:55,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:55,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 09:20:55,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1060, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:20:55,447 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 36 states. [2020-10-28 09:20:55,645 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 46 [2020-10-28 09:20:57,679 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-10-28 09:20:57,853 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-28 09:20:58,135 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-28 09:20:58,330 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-28 09:20:58,606 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 57 [2020-10-28 09:20:58,905 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-28 09:20:59,213 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-28 09:20:59,424 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-28 09:20:59,740 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 72 [2020-10-28 09:21:00,034 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2020-10-28 09:21:01,019 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-28 09:21:01,453 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 91 [2020-10-28 09:21:01,664 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-28 09:21:02,022 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2020-10-28 09:21:02,426 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 85 [2020-10-28 09:21:02,718 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 65 [2020-10-28 09:21:03,103 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 96 [2020-10-28 09:21:03,482 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-28 09:21:03,753 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-28 09:21:04,027 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 55 [2020-10-28 09:21:04,330 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2020-10-28 09:21:04,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:04,752 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2020-10-28 09:21:04,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-28 09:21:04,754 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 59 [2020-10-28 09:21:04,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:04,755 INFO L225 Difference]: With dead ends: 100 [2020-10-28 09:21:04,755 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 09:21:04,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=918, Invalid=5244, Unknown=0, NotChecked=0, Total=6162 [2020-10-28 09:21:04,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 09:21:04,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-10-28 09:21:04,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 09:21:04,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2020-10-28 09:21:04,770 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 59 [2020-10-28 09:21:04,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:04,771 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2020-10-28 09:21:04,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 09:21:04,771 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2020-10-28 09:21:04,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:21:04,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:04,772 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:04,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:21:04,772 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:04,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:04,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1786718545, now seen corresponding path program 8 times [2020-10-28 09:21:04,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:04,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965284909] [2020-10-28 09:21:04,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:04,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:04,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:04,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:04,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:04,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:05,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:05,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:05,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:05,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:06,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:06,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:06,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:07,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:07,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:07,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:09,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:09,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:09,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:09,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:21:09,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 09:21:09,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:21:09,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:09,796 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:09,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:21:09,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:21:09,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:21:09,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:10,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:10,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:10,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:10,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:10,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:10,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:21:10,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:10,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:10,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:10,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:10,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:10,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:21:10,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:10,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:10,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:10,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:10,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:10,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:10,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:10,426 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:10,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:10,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:10,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:10,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:10,442 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-28 09:21:10,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965284909] [2020-10-28 09:21:10,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:10,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:21:10,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385237106] [2020-10-28 09:21:10,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:21:10,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:10,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:21:10,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:21:10,447 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand 19 states. [2020-10-28 09:21:11,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:11,860 INFO L93 Difference]: Finished difference Result 111 states and 125 transitions. [2020-10-28 09:21:11,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:21:11,861 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2020-10-28 09:21:11,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:11,862 INFO L225 Difference]: With dead ends: 111 [2020-10-28 09:21:11,862 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 09:21:11,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:21:11,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 09:21:11,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2020-10-28 09:21:11,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-28 09:21:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 100 transitions. [2020-10-28 09:21:11,880 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 100 transitions. Word has length 59 [2020-10-28 09:21:11,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:11,880 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 100 transitions. [2020-10-28 09:21:11,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:21:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 100 transitions. [2020-10-28 09:21:11,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:21:11,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:11,881 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:11,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:21:11,882 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:11,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:11,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1230003213, now seen corresponding path program 9 times [2020-10-28 09:21:11,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:11,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855069378] [2020-10-28 09:21:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:11,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:11,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:12,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:12,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:12,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:12,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:14,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:14,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:14,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:15,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:15,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:15,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:15,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:15,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:16,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:16,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:16,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:21:16,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 09:21:16,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:21:16,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:16,913 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:16,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:21:16,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 09:21:16,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:21:16,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:17,463 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2020-10-28 09:21:17,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:17,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:17,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:17,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:17,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:17,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:17,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:17,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:17,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:17,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:17,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:17,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:17,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:17,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:17,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:17,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:17,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:17,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:17,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:17,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:17,918 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:17,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:17,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:17,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:17,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 49 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 09:21:17,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855069378] [2020-10-28 09:21:17,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:17,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:21:17,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244671232] [2020-10-28 09:21:17,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:21:17,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:17,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:21:17,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:21:17,930 INFO L87 Difference]: Start difference. First operand 86 states and 100 transitions. Second operand 20 states. [2020-10-28 09:21:18,484 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2020-10-28 09:21:19,402 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-28 09:21:20,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:20,047 INFO L93 Difference]: Finished difference Result 128 states and 144 transitions. [2020-10-28 09:21:20,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:21:20,048 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 59 [2020-10-28 09:21:20,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:20,050 INFO L225 Difference]: With dead ends: 128 [2020-10-28 09:21:20,050 INFO L226 Difference]: Without dead ends: 121 [2020-10-28 09:21:20,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=269, Invalid=1371, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:21:20,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-28 09:21:20,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 83. [2020-10-28 09:21:20,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 09:21:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2020-10-28 09:21:20,074 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 59 [2020-10-28 09:21:20,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:20,074 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2020-10-28 09:21:20,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:21:20,074 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2020-10-28 09:21:20,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:21:20,075 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:20,075 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:20,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:21:20,075 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:20,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:20,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1007722543, now seen corresponding path program 10 times [2020-10-28 09:21:20,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:20,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890876262] [2020-10-28 09:21:20,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:20,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:20,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:20,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:21,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:21,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:24,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:25,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:25,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:21:25,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:21:25,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:21:25,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:25,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:25,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:21:25,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:21:25,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:21:25,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:25,974 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2020-10-28 09:21:26,136 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 28 [2020-10-28 09:21:26,315 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 34 [2020-10-28 09:21:26,524 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2020-10-28 09:21:26,670 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 32 [2020-10-28 09:21:26,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:26,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:26,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:26,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:26,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:26,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:21:26,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:26,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:26,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:26,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:26,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:26,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:26,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:26,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:26,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:26,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:26,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:26,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:26,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:26,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:26,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:26,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:26,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:26,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 09:21:26,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890876262] [2020-10-28 09:21:26,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:26,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:21:26,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707058227] [2020-10-28 09:21:26,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:21:26,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:26,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:21:26,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:21:26,997 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand 21 states. [2020-10-28 09:21:27,601 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-28 09:21:28,666 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-28 09:21:28,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:28,898 INFO L93 Difference]: Finished difference Result 157 states and 187 transitions. [2020-10-28 09:21:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:21:28,899 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 59 [2020-10-28 09:21:28,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:28,900 INFO L225 Difference]: With dead ends: 157 [2020-10-28 09:21:28,901 INFO L226 Difference]: Without dead ends: 116 [2020-10-28 09:21:28,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:21:28,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-28 09:21:28,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2020-10-28 09:21:28,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-28 09:21:28,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 128 transitions. [2020-10-28 09:21:28,927 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 128 transitions. Word has length 59 [2020-10-28 09:21:28,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:28,927 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 128 transitions. [2020-10-28 09:21:28,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:21:28,927 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 128 transitions. [2020-10-28 09:21:28,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:21:28,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:28,928 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:28,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:21:28,928 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:28,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:28,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1386648973, now seen corresponding path program 11 times [2020-10-28 09:21:28,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:28,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528720247] [2020-10-28 09:21:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:28,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:29,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:29,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:29,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:29,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:29,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:29,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:30,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:30,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:30,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:32,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:33,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:33,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:33,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:33,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:21:33,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 09:21:33,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:21:33,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:33,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:21:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:21:33,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:21:33,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:34,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:34,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:34,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:34,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:34,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:34,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:34,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:21:34,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:34,126 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:34,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:34,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:34,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:34,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:34,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:34,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:34,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:34,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:34,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:34,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:34,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:34,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:34,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:34,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2020-10-28 09:21:34,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528720247] [2020-10-28 09:21:34,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:34,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:21:34,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018639302] [2020-10-28 09:21:34,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:21:34,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:34,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:21:34,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:21:34,144 INFO L87 Difference]: Start difference. First operand 109 states and 128 transitions. Second operand 9 states. [2020-10-28 09:21:34,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:34,579 INFO L93 Difference]: Finished difference Result 154 states and 180 transitions. [2020-10-28 09:21:34,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:21:34,580 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-28 09:21:34,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:34,581 INFO L225 Difference]: With dead ends: 154 [2020-10-28 09:21:34,581 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 09:21:34,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:21:34,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 09:21:34,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 94. [2020-10-28 09:21:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 09:21:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 107 transitions. [2020-10-28 09:21:34,613 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 107 transitions. Word has length 59 [2020-10-28 09:21:34,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:34,615 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 107 transitions. [2020-10-28 09:21:34,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:21:34,615 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 107 transitions. [2020-10-28 09:21:34,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:21:34,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:34,616 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:34,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:21:34,617 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:34,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:34,617 INFO L82 PathProgramCache]: Analyzing trace with hash 244131023, now seen corresponding path program 12 times [2020-10-28 09:21:34,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:34,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385005333] [2020-10-28 09:21:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:34,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:34,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:34,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:34,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:34,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:34,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:35,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:35,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:36,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:36,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:36,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:37,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:38,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:38,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:38,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:39,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:39,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:39,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:39,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:39,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:39,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 09:21:39,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 09:21:39,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:21:39,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:39,636 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:39,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:21:39,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:21:39,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 09:21:39,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:39,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:39,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:39,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:39,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:39,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:39,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:39,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:39,869 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:39,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:39,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:39,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:39,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:39,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:39,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:39,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:39,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:39,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:39,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:39,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:39,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:39,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:39,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-28 09:21:39,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385005333] [2020-10-28 09:21:39,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:39,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:21:39,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463459094] [2020-10-28 09:21:39,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:21:39,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:39,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:21:39,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:21:39,882 INFO L87 Difference]: Start difference. First operand 94 states and 107 transitions. Second operand 16 states. [2020-10-28 09:21:40,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:40,617 INFO L93 Difference]: Finished difference Result 187 states and 213 transitions. [2020-10-28 09:21:40,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:21:40,618 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-28 09:21:40,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:40,620 INFO L225 Difference]: With dead ends: 187 [2020-10-28 09:21:40,620 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 09:21:40,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:21:40,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 09:21:40,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 96. [2020-10-28 09:21:40,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 09:21:40,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 108 transitions. [2020-10-28 09:21:40,643 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 108 transitions. Word has length 61 [2020-10-28 09:21:40,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:40,643 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 108 transitions. [2020-10-28 09:21:40,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:21:40,643 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 108 transitions. [2020-10-28 09:21:40,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:21:40,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:40,644 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:40,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:21:40,644 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:40,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:40,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1206194957, now seen corresponding path program 13 times [2020-10-28 09:21:40,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:40,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835165684] [2020-10-28 09:21:40,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:40,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:40,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:40,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:41,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:43,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:45,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:45,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:45,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 09:21:45,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:21:45,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:21:45,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:45,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:45,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:21:45,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:21:45,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 09:21:45,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:45,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:45,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:45,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:45,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:45,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:45,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:21:45,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:45,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:45,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:45,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:45,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:45,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:45,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:45,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:45,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:45,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:45,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:45,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:45,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:45,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:45,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:45,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:45,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:45,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-28 09:21:45,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835165684] [2020-10-28 09:21:45,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:45,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:21:45,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523230796] [2020-10-28 09:21:45,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:21:45,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:45,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:21:45,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:21:45,948 INFO L87 Difference]: Start difference. First operand 96 states and 108 transitions. Second operand 16 states. [2020-10-28 09:21:46,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:46,875 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2020-10-28 09:21:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:21:46,876 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-28 09:21:46,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:46,877 INFO L225 Difference]: With dead ends: 114 [2020-10-28 09:21:46,877 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 09:21:46,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:21:46,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 09:21:46,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 67. [2020-10-28 09:21:46,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 09:21:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2020-10-28 09:21:46,894 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 61 [2020-10-28 09:21:46,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:46,894 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2020-10-28 09:21:46,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:21:46,894 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2020-10-28 09:21:46,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:21:46,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:46,895 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:46,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:21:46,895 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:46,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:46,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1874321502, now seen corresponding path program 13 times [2020-10-28 09:21:46,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:46,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085673677] [2020-10-28 09:21:46,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:46,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:47,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:49,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:51,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:52,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:52,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:21:52,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:21:52,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5301 [2020-10-28 09:21:52,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:52,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:52,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-28 09:21:52,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:21:52,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-28 09:21:52,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:52,814 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 43 [2020-10-28 09:21:52,974 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-28 09:21:53,162 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-28 09:21:53,366 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-28 09:21:53,532 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-28 09:21:53,732 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 58 [2020-10-28 09:21:53,988 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2020-10-28 09:21:54,170 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 52 [2020-10-28 09:21:54,425 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2020-10-28 09:21:54,705 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2020-10-28 09:21:54,901 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-28 09:21:55,155 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 62 [2020-10-28 09:21:55,473 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 66 [2020-10-28 09:21:55,681 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 55 [2020-10-28 09:21:55,868 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 49 [2020-10-28 09:21:56,064 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-28 09:21:56,239 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 47 [2020-10-28 09:21:56,581 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-28 09:21:56,754 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 45 [2020-10-28 09:21:56,955 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2020-10-28 09:21:57,136 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 43 [2020-10-28 09:21:57,334 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 44 [2020-10-28 09:21:58,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:58,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:58,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:58,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:58,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:58,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:58,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:21:58,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:58,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:58,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:58,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:58,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:58,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:58,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:58,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:58,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:58,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:58,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:58,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:21:58,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:58,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:58,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:58,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:58,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:58,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 25 proven. 78 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-28 09:21:58,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085673677] [2020-10-28 09:21:58,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:58,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 09:21:58,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663599018] [2020-10-28 09:21:58,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 09:21:58,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:58,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 09:21:58,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1376, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 09:21:58,813 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand 41 states. [2020-10-28 09:21:59,718 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 58 [2020-10-28 09:22:00,232 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 62 [2020-10-28 09:22:00,606 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-28 09:22:01,446 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 41 [2020-10-28 09:22:01,651 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-28 09:22:01,888 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-28 09:22:02,208 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-10-28 09:22:02,534 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 61 [2020-10-28 09:22:02,867 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2020-10-28 09:22:03,176 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-10-28 09:22:03,512 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 63 [2020-10-28 09:22:04,067 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-28 09:22:04,524 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 81 [2020-10-28 09:22:04,733 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-10-28 09:22:05,160 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 80 [2020-10-28 09:22:05,428 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-10-28 09:22:05,673 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-28 09:22:06,069 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 80 [2020-10-28 09:22:06,567 WARN L193 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 82 [2020-10-28 09:22:06,952 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2020-10-28 09:22:07,177 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-28 09:22:07,495 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 71 [2020-10-28 09:22:07,847 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-28 09:22:08,195 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 66 [2020-10-28 09:22:08,566 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2020-10-28 09:22:09,166 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 54 [2020-10-28 09:22:09,408 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 45 [2020-10-28 09:22:09,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:09,843 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2020-10-28 09:22:09,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-28 09:22:09,844 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 66 [2020-10-28 09:22:09,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:09,846 INFO L225 Difference]: With dead ends: 107 [2020-10-28 09:22:09,846 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 09:22:09,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=986, Invalid=5494, Unknown=0, NotChecked=0, Total=6480 [2020-10-28 09:22:09,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 09:22:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-10-28 09:22:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 09:22:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-10-28 09:22:09,869 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 66 [2020-10-28 09:22:09,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:09,869 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-10-28 09:22:09,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 09:22:09,869 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-10-28 09:22:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:22:09,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:09,870 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:09,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:22:09,870 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:09,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:09,871 INFO L82 PathProgramCache]: Analyzing trace with hash 68883168, now seen corresponding path program 14 times [2020-10-28 09:22:09,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:09,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176403777] [2020-10-28 09:22:09,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:09,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:09,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:10,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:10,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:10,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:10,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:11,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:11,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:11,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:11,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:11,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:12,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:12,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:13,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:13,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:13,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:13,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:13,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:13,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:14,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:14,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:14,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:14,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:14,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:14,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:14,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:22:14,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-28 09:22:14,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:22:14,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:14,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:14,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:22:14,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:22:14,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:22:14,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:16,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:16,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:16,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:16,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:16,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:16,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:16,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:16,208 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:16,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:16,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:16,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:16,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:16,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:22:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:16,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:16,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:16,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:16,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:16,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:22:16,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:16,212 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:16,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:16,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:16,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:16,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:16,228 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-10-28 09:22:16,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176403777] [2020-10-28 09:22:16,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:16,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:22:16,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003686407] [2020-10-28 09:22:16,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:22:16,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:16,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:22:16,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:22:16,230 INFO L87 Difference]: Start difference. First operand 76 states and 85 transitions. Second operand 21 states. [2020-10-28 09:22:16,798 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 30 [2020-10-28 09:22:17,880 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-28 09:22:18,083 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 51 [2020-10-28 09:22:18,570 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-28 09:22:19,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:19,615 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2020-10-28 09:22:19,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:22:19,616 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 66 [2020-10-28 09:22:19,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:19,617 INFO L225 Difference]: With dead ends: 106 [2020-10-28 09:22:19,618 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 09:22:19,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=368, Invalid=1794, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 09:22:19,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 09:22:19,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 76. [2020-10-28 09:22:19,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-28 09:22:19,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 85 transitions. [2020-10-28 09:22:19,640 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 85 transitions. Word has length 66 [2020-10-28 09:22:19,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:19,641 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 85 transitions. [2020-10-28 09:22:19,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:22:19,641 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 85 transitions. [2020-10-28 09:22:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 09:22:19,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:19,642 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:19,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:22:19,642 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:19,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:19,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1936361116, now seen corresponding path program 15 times [2020-10-28 09:22:19,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:19,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778022921] [2020-10-28 09:22:19,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:19,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:19,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:19,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:19,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:20,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:20,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:20,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:20,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:24,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:24,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 09:22:24,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 09:22:24,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:22:24,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:24,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:24,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:22:24,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:22:24,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 09:22:24,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0