/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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-crafted/zero_sum2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 03:22:58,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 03:22:58,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 03:22:58,693 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 03:22:58,693 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 03:22:58,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 03:22:58,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 03:22:58,706 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 03:22:58,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 03:22:58,715 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 03:22:58,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 03:22:58,718 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 03:22:58,718 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 03:22:58,721 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 03:22:58,724 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 03:22:58,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 03:22:58,727 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 03:22:58,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 03:22:58,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 03:22:58,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 03:22:58,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 03:22:58,746 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 03:22:58,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 03:22:58,748 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 03:22:58,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 03:22:58,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 03:22:58,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 03:22:58,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 03:22:58,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 03:22:58,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 03:22:58,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 03:22:58,755 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 03:22:58,756 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 03:22:58,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 03:22:58,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 03:22:58,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 03:22:58,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 03:22:58,760 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 03:22:58,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 03:22:58,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 03:22:58,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 03:22:58,765 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 [2020-10-29 03:22:58,793 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 03:22:58,793 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 03:22:58,794 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 03:22:58,795 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 03:22:58,795 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 03:22:58,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 03:22:58,795 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 03:22:58,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 03:22:58,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 03:22:58,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 03:22:58,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 03:22:58,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 03:22:58,797 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 03:22:58,797 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 03:22:58,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 03:22:58,797 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 03:22:58,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 03:22:58,798 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 03:22:58,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 03:22:58,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 03:22:58,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 03:22:58,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 03:22:58,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 03:22:58,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 03:22:58,799 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 03:22:58,799 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 03:22:58,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 03:22:58,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 03:22:58,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 03:22:58,800 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 03:22:59,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 03:22:59,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 03:22:59,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 03:22:59,214 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 03:22:59,215 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 03:22:59,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum2.c [2020-10-29 03:22:59,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f65712745/c1efb1b1328f4e35b8f6bd86657e2b46/FLAG5cfae9daf [2020-10-29 03:22:59,984 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 03:22:59,985 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum2.c [2020-10-29 03:22:59,993 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f65712745/c1efb1b1328f4e35b8f6bd86657e2b46/FLAG5cfae9daf [2020-10-29 03:23:00,353 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f65712745/c1efb1b1328f4e35b8f6bd86657e2b46 [2020-10-29 03:23:00,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 03:23:00,371 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 03:23:00,374 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 03:23:00,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 03:23:00,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 03:23:00,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:23:00" (1/1) ... [2020-10-29 03:23:00,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188d3348 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:00, skipping insertion in model container [2020-10-29 03:23:00,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 03:23:00" (1/1) ... [2020-10-29 03:23:00,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 03:23:00,408 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 03:23:00,582 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:23:00,590 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 03:23:00,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 03:23:00,631 INFO L208 MainTranslator]: Completed translation [2020-10-29 03:23:00,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:00 WrapperNode [2020-10-29 03:23:00,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 03:23:00,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 03:23:00,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 03:23:00,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 03:23:00,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:00" (1/1) ... [2020-10-29 03:23:00,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:00" (1/1) ... [2020-10-29 03:23:00,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:00" (1/1) ... [2020-10-29 03:23:00,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:00" (1/1) ... [2020-10-29 03:23:00,664 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:00" (1/1) ... [2020-10-29 03:23:00,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:00" (1/1) ... [2020-10-29 03:23:00,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:00" (1/1) ... [2020-10-29 03:23:00,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 03:23:00,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 03:23:00,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 03:23:00,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 03:23:00,678 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:00" (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 [2020-10-29 03:23:00,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 03:23:00,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 03:23:00,754 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 03:23:00,754 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 03:23:00,755 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-29 03:23:00,755 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 03:23:00,755 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 03:23:00,755 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 03:23:00,755 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 03:23:00,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 03:23:00,756 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 03:23:00,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-29 03:23:00,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2020-10-29 03:23:00,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 03:23:00,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 03:23:00,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 03:23:00,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 03:23:00,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 03:23:00,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 03:23:00,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 03:23:01,099 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 03:23:01,100 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-29 03:23:01,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:23:01 BoogieIcfgContainer [2020-10-29 03:23:01,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 03:23:01,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 03:23:01,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 03:23:01,157 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 03:23:01,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 03:23:00" (1/3) ... [2020-10-29 03:23:01,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5944b0da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:23:01, skipping insertion in model container [2020-10-29 03:23:01,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 03:23:00" (2/3) ... [2020-10-29 03:23:01,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5944b0da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 03:23:01, skipping insertion in model container [2020-10-29 03:23:01,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 03:23:01" (3/3) ... [2020-10-29 03:23:01,166 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum2.c [2020-10-29 03:23:01,196 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 03:23:01,205 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 03:23:01,241 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 03:23:01,292 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 03:23:01,292 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 03:23:01,292 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 03:23:01,292 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 03:23:01,292 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 03:23:01,293 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 03:23:01,293 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 03:23:01,293 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 03:23:01,322 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-29 03:23:01,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-29 03:23:01,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:01,333 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] [2020-10-29 03:23:01,335 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:01,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:01,346 INFO L82 PathProgramCache]: Analyzing trace with hash 994645046, now seen corresponding path program 1 times [2020-10-29 03:23:01,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:01,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576620888] [2020-10-29 03:23:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:01,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:01,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:01,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:01,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:01,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:02,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:02,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:02,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-29 03:23:02,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:23:02,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1095 [2020-10-29 03:23:02,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:02,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:02,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:23:02,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:02,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-29 03:23:02,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 03:23:02,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:02,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:02,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:02,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:02,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:02,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:23:02,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:02,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:02,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:02,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:02,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:02,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:02,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576620888] [2020-10-29 03:23:02,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:23:02,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-29 03:23:02,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213429282] [2020-10-29 03:23:02,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 03:23:02,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:02,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 03:23:02,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:23:02,883 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 6 states. [2020-10-29 03:23:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:03,133 INFO L93 Difference]: Finished difference Result 80 states and 111 transitions. [2020-10-29 03:23:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:23:03,135 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-29 03:23:03,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:03,143 INFO L225 Difference]: With dead ends: 80 [2020-10-29 03:23:03,144 INFO L226 Difference]: Without dead ends: 34 [2020-10-29 03:23:03,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:23:03,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-29 03:23:03,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-10-29 03:23:03,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-29 03:23:03,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-29 03:23:03,192 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 21 [2020-10-29 03:23:03,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:03,193 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-29 03:23:03,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 03:23:03,193 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-29 03:23:03,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-29 03:23:03,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:03,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:03,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 03:23:03,195 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:03,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:03,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2037849340, now seen corresponding path program 1 times [2020-10-29 03:23:03,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:03,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167917502] [2020-10-29 03:23:03,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:03,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:03,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:03,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:03,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:03,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:03,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:03,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:03,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:04,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:04,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-29 03:23:04,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-29 03:23:04,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1759 [2020-10-29 03:23:04,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:04,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:04,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 03:23:04,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:04,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-29 03:23:04,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:05,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:05,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:05,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:05,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:05,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:05,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-29 03:23:05,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:05,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:05,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:05,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:05,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:05,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:05,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-29 03:23:05,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167917502] [2020-10-29 03:23:05,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 03:23:05,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 03:23:05,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621443171] [2020-10-29 03:23:05,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 03:23:05,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:05,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 03:23:05,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 03:23:05,106 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2020-10-29 03:23:05,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:05,265 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2020-10-29 03:23:05,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 03:23:05,266 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-29 03:23:05,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:05,267 INFO L225 Difference]: With dead ends: 55 [2020-10-29 03:23:05,267 INFO L226 Difference]: Without dead ends: 35 [2020-10-29 03:23:05,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 03:23:05,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-29 03:23:05,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2020-10-29 03:23:05,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-29 03:23:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-29 03:23:05,277 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 23 [2020-10-29 03:23:05,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:05,277 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-29 03:23:05,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 03:23:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-29 03:23:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 03:23:05,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:05,279 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] [2020-10-29 03:23:05,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 03:23:05,279 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:05,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:05,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1372549430, now seen corresponding path program 1 times [2020-10-29 03:23:05,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:05,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840408289] [2020-10-29 03:23:05,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:05,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:05,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:06,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:06,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:06,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:06,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:07,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:07,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:10,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:10,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 03:23:10,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-29 03:23:10,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:23:10,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:10,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:10,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-29 03:23:10,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:10,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 03:23:10,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:10,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:10,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:10,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:10,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:10,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:10,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:23:10,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:10,400 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:10,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:10,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:10,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:10,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:10,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-29 03:23:10,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840408289] [2020-10-29 03:23:10,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:10,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-29 03:23:10,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633519899] [2020-10-29 03:23:10,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-29 03:23:10,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:10,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-29 03:23:10,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-29 03:23:10,414 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2020-10-29 03:23:10,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:10,671 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-10-29 03:23:10,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-29 03:23:10,674 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-29 03:23:10,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:10,675 INFO L225 Difference]: With dead ends: 57 [2020-10-29 03:23:10,675 INFO L226 Difference]: Without dead ends: 39 [2020-10-29 03:23:10,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-29 03:23:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-29 03:23:10,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-29 03:23:10,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-29 03:23:10,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-10-29 03:23:10,695 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 29 [2020-10-29 03:23:10,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:10,697 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-10-29 03:23:10,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-29 03:23:10,698 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-10-29 03:23:10,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 03:23:10,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:10,701 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:10,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 03:23:10,702 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:10,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:10,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1051640402, now seen corresponding path program 2 times [2020-10-29 03:23:10,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:10,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923665132] [2020-10-29 03:23:10,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:10,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:10,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:10,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:11,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:11,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:12,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:12,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:12,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:14,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:15,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:15,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:15,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 03:23:15,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:23:15,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:23:15,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:15,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:15,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-29 03:23:15,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:15,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-29 03:23:15,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:16,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:16,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:16,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:16,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:16,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:16,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:23:16,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:16,353 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:16,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:16,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:16,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:16,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:16,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923665132] [2020-10-29 03:23:16,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:16,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-29 03:23:16,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421319287] [2020-10-29 03:23:16,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-29 03:23:16,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:16,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-29 03:23:16,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:23:16,370 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 17 states. [2020-10-29 03:23:16,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:16,923 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2020-10-29 03:23:16,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:23:16,924 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2020-10-29 03:23:16,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:16,925 INFO L225 Difference]: With dead ends: 65 [2020-10-29 03:23:16,925 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 03:23:16,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-29 03:23:16,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 03:23:16,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2020-10-29 03:23:16,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-29 03:23:16,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2020-10-29 03:23:16,937 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 37 [2020-10-29 03:23:16,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:16,938 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2020-10-29 03:23:16,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-29 03:23:16,938 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2020-10-29 03:23:16,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 03:23:16,939 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:16,940 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:16,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 03:23:16,940 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:16,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:16,941 INFO L82 PathProgramCache]: Analyzing trace with hash 628182548, now seen corresponding path program 3 times [2020-10-29 03:23:16,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:16,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920998409] [2020-10-29 03:23:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:16,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:16,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:16,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:17,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:21,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:21,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 03:23:21,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:23:21,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-29 03:23:21,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:21,964 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:21,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:23:21,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 03:23:21,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-29 03:23:21,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:22,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:22,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:22,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:22,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:22,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:22,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:22,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 03:23:22,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:22,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:22,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:22,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:22,086 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 03:23:22,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920998409] [2020-10-29 03:23:22,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:22,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:23:22,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106661146] [2020-10-29 03:23:22,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:23:22,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:22,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:23:22,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:23:22,091 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand 10 states. [2020-10-29 03:23:22,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:22,564 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2020-10-29 03:23:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-29 03:23:22,565 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-29 03:23:22,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:22,566 INFO L225 Difference]: With dead ends: 83 [2020-10-29 03:23:22,566 INFO L226 Difference]: Without dead ends: 65 [2020-10-29 03:23:22,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:23:22,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-29 03:23:22,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 54. [2020-10-29 03:23:22,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-29 03:23:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-29 03:23:22,590 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 39 [2020-10-29 03:23:22,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:22,590 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-29 03:23:22,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:23:22,591 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-29 03:23:22,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 03:23:22,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:22,596 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:22,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 03:23:22,596 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:22,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:22,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1741366868, now seen corresponding path program 4 times [2020-10-29 03:23:22,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:22,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943063352] [2020-10-29 03:23:22,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:22,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:22,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:22,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:22,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:27,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:27,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 03:23:27,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:23:27,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-29 03:23:27,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:27,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:27,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-29 03:23:27,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:23:27,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:23:27,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:27,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:27,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:27,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:27,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:27,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:27,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:27,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:23:27,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:27,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:27,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:27,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:27,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:27,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-29 03:23:27,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943063352] [2020-10-29 03:23:27,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:27,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-29 03:23:27,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276120105] [2020-10-29 03:23:27,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-29 03:23:27,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:27,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-29 03:23:27,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-29 03:23:27,762 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 10 states. [2020-10-29 03:23:28,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:28,139 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2020-10-29 03:23:28,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-29 03:23:28,140 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-29 03:23:28,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:28,143 INFO L225 Difference]: With dead ends: 93 [2020-10-29 03:23:28,143 INFO L226 Difference]: Without dead ends: 51 [2020-10-29 03:23:28,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:23:28,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-29 03:23:28,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2020-10-29 03:23:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-29 03:23:28,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-10-29 03:23:28,162 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 39 [2020-10-29 03:23:28,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:28,162 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-10-29 03:23:28,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-29 03:23:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-10-29 03:23:28,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-29 03:23:28,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:28,169 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:28,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 03:23:28,169 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:28,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:28,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1076392486, now seen corresponding path program 5 times [2020-10-29 03:23:28,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:28,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808024255] [2020-10-29 03:23:28,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:28,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:28,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:28,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:28,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:29,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:29,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:29,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:30,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:30,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:31,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:31,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:32,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:32,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:33,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:33,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:33,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-29 03:23:33,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 03:23:33,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 03:23:33,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:33,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:33,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-29 03:23:33,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:33,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-29 03:23:33,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:34,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:34,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:34,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:34,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:34,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:34,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:23:34,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:34,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:34,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:34,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:34,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:34,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:34,513 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:34,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808024255] [2020-10-29 03:23:34,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:34,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-29 03:23:34,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135758737] [2020-10-29 03:23:34,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-29 03:23:34,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:34,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-29 03:23:34,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2020-10-29 03:23:34,516 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 24 states. [2020-10-29 03:23:35,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:35,322 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-10-29 03:23:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-29 03:23:35,323 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2020-10-29 03:23:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:35,324 INFO L225 Difference]: With dead ends: 79 [2020-10-29 03:23:35,324 INFO L226 Difference]: Without dead ends: 73 [2020-10-29 03:23:35,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:23:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-29 03:23:35,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2020-10-29 03:23:35,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-29 03:23:35,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2020-10-29 03:23:35,339 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 45 [2020-10-29 03:23:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:35,339 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2020-10-29 03:23:35,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-29 03:23:35,339 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2020-10-29 03:23:35,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 03:23:35,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:35,341 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-29 03:23:35,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 03:23:35,341 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:35,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:35,342 INFO L82 PathProgramCache]: Analyzing trace with hash 782919580, now seen corresponding path program 6 times [2020-10-29 03:23:35,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:35,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190211991] [2020-10-29 03:23:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:35,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:35,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:35,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:36,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:40,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:40,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:23:40,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:23:40,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:23:40,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:40,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:40,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:23:40,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-29 03:23:40,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-29 03:23:40,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:40,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:40,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:40,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:40,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:40,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:40,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 03:23:40,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:40,574 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:40,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:40,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:40,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:40,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 03:23:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-29 03:23:40,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190211991] [2020-10-29 03:23:40,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:40,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:23:40,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455345612] [2020-10-29 03:23:40,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:23:40,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:40,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:23:40,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:23:40,589 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 12 states. [2020-10-29 03:23:41,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:41,299 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2020-10-29 03:23:41,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:23:41,299 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-29 03:23:41,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:41,301 INFO L225 Difference]: With dead ends: 101 [2020-10-29 03:23:41,301 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 03:23:41,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-29 03:23:41,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 03:23:41,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-29 03:23:41,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-29 03:23:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-10-29 03:23:41,331 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 47 [2020-10-29 03:23:41,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:41,332 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-10-29 03:23:41,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:23:41,332 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-10-29 03:23:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-29 03:23:41,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:41,333 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-29 03:23:41,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 03:23:41,337 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:41,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:41,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1106194396, now seen corresponding path program 7 times [2020-10-29 03:23:41,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:41,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458710754] [2020-10-29 03:23:41,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:41,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:41,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:41,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:41,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:46,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:46,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-29 03:23:46,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:23:46,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-29 03:23:46,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:46,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:46,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-29 03:23:46,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 03:23:46,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-29 03:23:46,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:46,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:46,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:46,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:46,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:46,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:46,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:23:46,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:46,502 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:46,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:46,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:46,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:46,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-29 03:23:46,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458710754] [2020-10-29 03:23:46,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:46,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-29 03:23:46,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670179433] [2020-10-29 03:23:46,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-29 03:23:46,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:46,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-29 03:23:46,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-29 03:23:46,520 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 12 states. [2020-10-29 03:23:46,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:46,942 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2020-10-29 03:23:46,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-29 03:23:46,943 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-10-29 03:23:46,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:46,944 INFO L225 Difference]: With dead ends: 111 [2020-10-29 03:23:46,944 INFO L226 Difference]: Without dead ends: 59 [2020-10-29 03:23:46,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-29 03:23:46,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-29 03:23:46,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-10-29 03:23:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-29 03:23:46,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-10-29 03:23:46,971 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 47 [2020-10-29 03:23:46,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:46,972 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-10-29 03:23:46,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-29 03:23:46,972 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-10-29 03:23:46,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-29 03:23:46,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:46,973 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:23:46,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 03:23:46,974 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:46,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:46,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1270681246, now seen corresponding path program 8 times [2020-10-29 03:23:46,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:46,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636575588] [2020-10-29 03:23:46,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:46,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:47,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:47,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:47,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:48,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:49,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:49,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:50,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:51,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:51,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:51,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:51,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-29 03:23:51,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-29 03:23:51,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:23:51,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:51,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:51,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-29 03:23:51,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:23:51,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-29 03:23:51,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:54,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:23:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:54,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:54,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:23:54,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:23:54,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:23:54,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 03:23:54,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:23:54,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:23:54,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:23:54,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:23:54,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:23:54,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:23:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:23:54,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636575588] [2020-10-29 03:23:54,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:23:54,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-29 03:23:54,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251683661] [2020-10-29 03:23:54,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-29 03:23:54,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:23:54,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-29 03:23:54,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1388, Unknown=0, NotChecked=0, Total=1482 [2020-10-29 03:23:54,606 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 39 states. [2020-10-29 03:23:54,964 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-29 03:23:55,216 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-29 03:23:55,477 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 53 [2020-10-29 03:23:55,856 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-10-29 03:23:56,274 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-29 03:23:56,659 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-29 03:23:56,967 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-29 03:23:57,515 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-29 03:23:57,908 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-29 03:23:58,287 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 55 [2020-10-29 03:23:59,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:23:59,267 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2020-10-29 03:23:59,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-29 03:23:59,267 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 53 [2020-10-29 03:23:59,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:23:59,268 INFO L225 Difference]: With dead ends: 97 [2020-10-29 03:23:59,268 INFO L226 Difference]: Without dead ends: 91 [2020-10-29 03:23:59,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=234, Invalid=3426, Unknown=0, NotChecked=0, Total=3660 [2020-10-29 03:23:59,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-29 03:23:59,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-29 03:23:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-29 03:23:59,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2020-10-29 03:23:59,287 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 53 [2020-10-29 03:23:59,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:23:59,287 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2020-10-29 03:23:59,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-29 03:23:59,287 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2020-10-29 03:23:59,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 03:23:59,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:23:59,288 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-29 03:23:59,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 03:23:59,289 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:23:59,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:23:59,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1943804196, now seen corresponding path program 9 times [2020-10-29 03:23:59,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:23:59,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480515421] [2020-10-29 03:23:59,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:23:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:23:59,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:59,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:23:59,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:00,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:04,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:04,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 03:24:04,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:24:04,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:24:04,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:04,308 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:04,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:24:04,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-10-29 03:24:04,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-29 03:24:04,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:04,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:04,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:04,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:04,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:04,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:04,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:04,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:24:04,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:04,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:04,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:04,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:04,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:04,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-29 03:24:04,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480515421] [2020-10-29 03:24:04,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:04,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:24:04,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892197100] [2020-10-29 03:24:04,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:24:04,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:04,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:24:04,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:24:04,505 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand 14 states. [2020-10-29 03:24:05,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:05,443 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2020-10-29 03:24:05,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-29 03:24:05,444 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-10-29 03:24:05,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:05,445 INFO L225 Difference]: With dead ends: 119 [2020-10-29 03:24:05,445 INFO L226 Difference]: Without dead ends: 93 [2020-10-29 03:24:05,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-29 03:24:05,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-29 03:24:05,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-29 03:24:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-29 03:24:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2020-10-29 03:24:05,460 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 55 [2020-10-29 03:24:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:05,460 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2020-10-29 03:24:05,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:24:05,460 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2020-10-29 03:24:05,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-29 03:24:05,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:05,461 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-29 03:24:05,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 03:24:05,462 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:05,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:05,462 INFO L82 PathProgramCache]: Analyzing trace with hash -921710236, now seen corresponding path program 10 times [2020-10-29 03:24:05,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:05,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345840653] [2020-10-29 03:24:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:05,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:05,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:05,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:05,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:10,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:10,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-29 03:24:10,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:24:10,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:24:10,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:10,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:10,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-29 03:24:10,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:24:10,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-29 03:24:10,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:10,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:10,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:10,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:10,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:10,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:10,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 03:24:10,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:10,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:10,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:10,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:10,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:10,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-29 03:24:10,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345840653] [2020-10-29 03:24:10,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:10,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-29 03:24:10,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459808993] [2020-10-29 03:24:10,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-29 03:24:10,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:10,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-29 03:24:10,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-29 03:24:10,672 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand 14 states. [2020-10-29 03:24:11,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:11,192 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2020-10-29 03:24:11,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-29 03:24:11,193 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-10-29 03:24:11,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:11,194 INFO L225 Difference]: With dead ends: 129 [2020-10-29 03:24:11,195 INFO L226 Difference]: Without dead ends: 67 [2020-10-29 03:24:11,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:24:11,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-29 03:24:11,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2020-10-29 03:24:11,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-29 03:24:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2020-10-29 03:24:11,217 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 55 [2020-10-29 03:24:11,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:11,217 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2020-10-29 03:24:11,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-29 03:24:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2020-10-29 03:24:11,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-29 03:24:11,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:11,218 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:11,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 03:24:11,219 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:11,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:11,219 INFO L82 PathProgramCache]: Analyzing trace with hash -729223958, now seen corresponding path program 11 times [2020-10-29 03:24:11,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:11,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349055452] [2020-10-29 03:24:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:11,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:11,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:11,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:12,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:13,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:14,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:14,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:15,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:16,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:16,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:16,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-29 03:24:16,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-29 03:24:16,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5226 [2020-10-29 03:24:16,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:16,456 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:16,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-29 03:24:16,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:24:16,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-29 03:24:16,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:19,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:19,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:19,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:19,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:19,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:19,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 03:24:19,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:19,158 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:19,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:19,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:19,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:19,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:24:19,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349055452] [2020-10-29 03:24:19,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:19,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-29 03:24:19,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136359778] [2020-10-29 03:24:19,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-29 03:24:19,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:19,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-29 03:24:19,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1699, Unknown=0, NotChecked=0, Total=1806 [2020-10-29 03:24:19,193 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 43 states. [2020-10-29 03:24:21,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:21,289 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2020-10-29 03:24:21,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:24:21,290 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 61 [2020-10-29 03:24:21,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:21,291 INFO L225 Difference]: With dead ends: 107 [2020-10-29 03:24:21,291 INFO L226 Difference]: Without dead ends: 101 [2020-10-29 03:24:21,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=117, Invalid=1863, Unknown=0, NotChecked=0, Total=1980 [2020-10-29 03:24:21,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-29 03:24:21,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2020-10-29 03:24:21,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-29 03:24:21,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2020-10-29 03:24:21,311 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 61 [2020-10-29 03:24:21,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:21,311 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2020-10-29 03:24:21,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-29 03:24:21,312 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2020-10-29 03:24:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 03:24:21,314 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:21,314 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-29 03:24:21,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 03:24:21,314 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:21,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:21,315 INFO L82 PathProgramCache]: Analyzing trace with hash 413033132, now seen corresponding path program 12 times [2020-10-29 03:24:21,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:21,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505917109] [2020-10-29 03:24:21,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:21,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:21,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:21,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:22,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:26,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:26,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 03:24:26,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:24:26,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-29 03:24:26,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:26,340 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:26,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:24:26,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-29 03:24:26,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-29 03:24:26,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:26,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:26,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:26,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:26,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:26,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:26,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:24:26,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:26,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:26,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:26,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:26,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:26,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-29 03:24:26,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505917109] [2020-10-29 03:24:26,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:26,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:24:26,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380635218] [2020-10-29 03:24:26,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:24:26,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:26,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:24:26,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:24:26,553 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 16 states. [2020-10-29 03:24:27,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:27,648 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2020-10-29 03:24:27,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:24:27,649 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-29 03:24:27,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:27,650 INFO L225 Difference]: With dead ends: 137 [2020-10-29 03:24:27,651 INFO L226 Difference]: Without dead ends: 107 [2020-10-29 03:24:27,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:24:27,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-29 03:24:27,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-29 03:24:27,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-29 03:24:27,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2020-10-29 03:24:27,669 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 63 [2020-10-29 03:24:27,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:27,670 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2020-10-29 03:24:27,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:24:27,670 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2020-10-29 03:24:27,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-29 03:24:27,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:27,671 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-29 03:24:27,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 03:24:27,671 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:27,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:27,672 INFO L82 PathProgramCache]: Analyzing trace with hash -272299284, now seen corresponding path program 13 times [2020-10-29 03:24:27,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:27,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260240057] [2020-10-29 03:24:27,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:27,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:27,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:27,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:27,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:32,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:32,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-29 03:24:32,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:24:32,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:24:32,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:32,684 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-29 03:24:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 03:24:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-29 03:24:32,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:32,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:32,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:32,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:32,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:32,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:32,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:24:32,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:32,875 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:32,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:32,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:32,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:32,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-29 03:24:32,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260240057] [2020-10-29 03:24:32,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:32,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-29 03:24:32,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915276350] [2020-10-29 03:24:32,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-29 03:24:32,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:32,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-29 03:24:32,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-29 03:24:32,885 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 16 states. [2020-10-29 03:24:33,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:33,506 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2020-10-29 03:24:33,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-29 03:24:33,507 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2020-10-29 03:24:33,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:33,509 INFO L225 Difference]: With dead ends: 147 [2020-10-29 03:24:33,509 INFO L226 Difference]: Without dead ends: 75 [2020-10-29 03:24:33,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2020-10-29 03:24:33,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-29 03:24:33,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2020-10-29 03:24:33,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-29 03:24:33,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-10-29 03:24:33,521 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 63 [2020-10-29 03:24:33,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:33,522 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-10-29 03:24:33,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-29 03:24:33,522 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-10-29 03:24:33,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-29 03:24:33,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:33,523 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:24:33,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 03:24:33,523 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:33,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:33,524 INFO L82 PathProgramCache]: Analyzing trace with hash 255950962, now seen corresponding path program 14 times [2020-10-29 03:24:33,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:33,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971583262] [2020-10-29 03:24:33,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:33,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:33,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:34,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:35,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:36,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:37,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:37,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:38,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:38,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-29 03:24:38,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-29 03:24:38,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-29 03:24:38,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:38,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:38,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-29 03:24:38,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:24:38,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-29 03:24:38,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:44,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:44,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:44,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:44,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:44,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:44,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:24:44,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:44,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:44,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:44,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:44,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:44,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:24:44,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971583262] [2020-10-29 03:24:44,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:44,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-29 03:24:44,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700366497] [2020-10-29 03:24:44,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-29 03:24:44,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:44,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-29 03:24:44,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2840, Unknown=0, NotChecked=0, Total=2970 [2020-10-29 03:24:44,359 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 55 states. [2020-10-29 03:24:44,948 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-29 03:24:46,753 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-29 03:24:49,972 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 99 [2020-10-29 03:24:50,613 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 77 [2020-10-29 03:24:53,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:53,478 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2020-10-29 03:24:53,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-29 03:24:53,481 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 69 [2020-10-29 03:24:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:53,482 INFO L225 Difference]: With dead ends: 125 [2020-10-29 03:24:53,482 INFO L226 Difference]: Without dead ends: 119 [2020-10-29 03:24:53,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=308, Invalid=6334, Unknown=0, NotChecked=0, Total=6642 [2020-10-29 03:24:53,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-29 03:24:53,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2020-10-29 03:24:53,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 03:24:53,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2020-10-29 03:24:53,500 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 69 [2020-10-29 03:24:53,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:53,500 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2020-10-29 03:24:53,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-29 03:24:53,500 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2020-10-29 03:24:53,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 03:24:53,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:53,501 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-10-29 03:24:53,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 03:24:53,502 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:53,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:53,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1232518092, now seen corresponding path program 15 times [2020-10-29 03:24:53,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:53,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84632387] [2020-10-29 03:24:53,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:53,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:53,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:53,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:54,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:58,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:58,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 03:24:58,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:24:58,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:24:58,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:58,515 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:58,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:24:58,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:24:58,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-29 03:24:58,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:58,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:24:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:58,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:58,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:24:58,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:24:58,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:24:58,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:24:58,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:24:58,774 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:24:58,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:24:58,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:24:58,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:24:58,774 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:24:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-29 03:24:58,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84632387] [2020-10-29 03:24:58,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:24:58,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:24:58,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649738469] [2020-10-29 03:24:58,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:24:58,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:24:58,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:24:58,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:24:58,785 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand 18 states. [2020-10-29 03:24:59,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:24:59,595 INFO L93 Difference]: Finished difference Result 195 states and 208 transitions. [2020-10-29 03:24:59,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-29 03:24:59,596 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 71 [2020-10-29 03:24:59,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:24:59,597 INFO L225 Difference]: With dead ends: 195 [2020-10-29 03:24:59,598 INFO L226 Difference]: Without dead ends: 117 [2020-10-29 03:24:59,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2020-10-29 03:24:59,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-29 03:24:59,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2020-10-29 03:24:59,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-29 03:24:59,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 111 transitions. [2020-10-29 03:24:59,617 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 111 transitions. Word has length 71 [2020-10-29 03:24:59,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:24:59,618 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 111 transitions. [2020-10-29 03:24:59,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:24:59,618 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 111 transitions. [2020-10-29 03:24:59,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-29 03:24:59,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:24:59,619 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-10-29 03:24:59,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 03:24:59,619 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:24:59,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:24:59,620 INFO L82 PathProgramCache]: Analyzing trace with hash -117939276, now seen corresponding path program 16 times [2020-10-29 03:24:59,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:24:59,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128002143] [2020-10-29 03:24:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:24:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:24:59,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:59,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:24:59,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:00,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:04,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:04,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-29 03:25:04,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:25:04,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-29 03:25:04,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:04,633 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:04,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-29 03:25:04,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:25:04,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-29 03:25:04,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:04,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:04,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:04,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:04,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:04,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:04,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:25:04,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:04,894 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:04,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:04,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:04,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:04,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-29 03:25:04,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128002143] [2020-10-29 03:25:04,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:04,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-29 03:25:04,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059002809] [2020-10-29 03:25:04,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-29 03:25:04,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:04,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-29 03:25:04,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-29 03:25:04,903 INFO L87 Difference]: Start difference. First operand 105 states and 111 transitions. Second operand 18 states. [2020-10-29 03:25:05,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:05,976 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2020-10-29 03:25:05,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-29 03:25:05,977 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 71 [2020-10-29 03:25:05,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:05,978 INFO L225 Difference]: With dead ends: 113 [2020-10-29 03:25:05,978 INFO L226 Difference]: Without dead ends: 79 [2020-10-29 03:25:05,980 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=248, Invalid=808, Unknown=0, NotChecked=0, Total=1056 [2020-10-29 03:25:05,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-29 03:25:05,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-29 03:25:05,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-29 03:25:05,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2020-10-29 03:25:05,989 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 71 [2020-10-29 03:25:05,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:05,990 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2020-10-29 03:25:05,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-29 03:25:05,990 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2020-10-29 03:25:05,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-29 03:25:05,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:05,990 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:25:05,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 03:25:05,991 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:05,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:05,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1996182534, now seen corresponding path program 17 times [2020-10-29 03:25:05,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:05,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354047944] [2020-10-29 03:25:05,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:06,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:06,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:06,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:08,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:09,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:11,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:11,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:11,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-29 03:25:11,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-29 03:25:11,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5616 [2020-10-29 03:25:11,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:11,616 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:11,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-29 03:25:11,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:25:11,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-29 03:25:11,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:18,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:18,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:18,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:18,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:18,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:18,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-29 03:25:18,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:18,743 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:18,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:18,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:18,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:18,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:25:18,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354047944] [2020-10-29 03:25:18,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:18,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-29 03:25:18,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579707799] [2020-10-29 03:25:18,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-29 03:25:18,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:18,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-29 03:25:18,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=3638, Unknown=0, NotChecked=0, Total=3782 [2020-10-29 03:25:18,798 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 62 states. [2020-10-29 03:25:22,080 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2020-10-29 03:25:22,979 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-29 03:25:26,707 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 100 [2020-10-29 03:25:27,461 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-29 03:25:32,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:32,159 INFO L93 Difference]: Finished difference Result 135 states and 142 transitions. [2020-10-29 03:25:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-29 03:25:32,160 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 77 [2020-10-29 03:25:32,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:32,161 INFO L225 Difference]: With dead ends: 135 [2020-10-29 03:25:32,161 INFO L226 Difference]: Without dead ends: 129 [2020-10-29 03:25:32,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=353, Invalid=8389, Unknown=0, NotChecked=0, Total=8742 [2020-10-29 03:25:32,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-29 03:25:32,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 116. [2020-10-29 03:25:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-29 03:25:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2020-10-29 03:25:32,180 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 77 [2020-10-29 03:25:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:32,180 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2020-10-29 03:25:32,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-29 03:25:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2020-10-29 03:25:32,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 03:25:32,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:32,181 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:25:32,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 03:25:32,181 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:32,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:32,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1563737532, now seen corresponding path program 18 times [2020-10-29 03:25:32,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:32,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216109704] [2020-10-29 03:25:32,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:32,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:32,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:32,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:33,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:37,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:37,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 03:25:37,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:25:37,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-29 03:25:37,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:37,193 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:37,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:25:37,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-29 03:25:37,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-29 03:25:37,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:37,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:37,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:37,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:37,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:37,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:37,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:25:37,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:37,562 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:37,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:37,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:37,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:37,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-29 03:25:37,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216109704] [2020-10-29 03:25:37,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:37,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:25:37,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795887886] [2020-10-29 03:25:37,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:25:37,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:37,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:25:37,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:25:37,572 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand 20 states. [2020-10-29 03:25:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:39,798 INFO L93 Difference]: Finished difference Result 173 states and 184 transitions. [2020-10-29 03:25:39,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-29 03:25:39,800 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2020-10-29 03:25:39,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:39,801 INFO L225 Difference]: With dead ends: 173 [2020-10-29 03:25:39,801 INFO L226 Difference]: Without dead ends: 135 [2020-10-29 03:25:39,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2020-10-29 03:25:39,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-29 03:25:39,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2020-10-29 03:25:39,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-29 03:25:39,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2020-10-29 03:25:39,820 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 79 [2020-10-29 03:25:39,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:39,821 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2020-10-29 03:25:39,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:25:39,821 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2020-10-29 03:25:39,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-29 03:25:39,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:39,822 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:25:39,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 03:25:39,822 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:39,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:39,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1951221244, now seen corresponding path program 19 times [2020-10-29 03:25:39,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:39,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479528419] [2020-10-29 03:25:39,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:39,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:39,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:39,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:40,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:44,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:44,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-29 03:25:44,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 03:25:44,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-29 03:25:44,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:44,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:44,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-29 03:25:44,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 03:25:44,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-29 03:25:44,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:45,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:25:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:45,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:45,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:45,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:25:45,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:25:45,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:25:45,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:45,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:45,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:25:45,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:25:45,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:25:45,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-29 03:25:45,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479528419] [2020-10-29 03:25:45,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:25:45,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-29 03:25:45,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635105129] [2020-10-29 03:25:45,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-29 03:25:45,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:25:45,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-29 03:25:45,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2020-10-29 03:25:45,273 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand 20 states. [2020-10-29 03:25:46,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 03:25:46,400 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2020-10-29 03:25:46,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-29 03:25:46,401 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 79 [2020-10-29 03:25:46,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 03:25:46,403 INFO L225 Difference]: With dead ends: 183 [2020-10-29 03:25:46,403 INFO L226 Difference]: Without dead ends: 91 [2020-10-29 03:25:46,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2020-10-29 03:25:46,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-29 03:25:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 87. [2020-10-29 03:25:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-29 03:25:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2020-10-29 03:25:46,417 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 79 [2020-10-29 03:25:46,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 03:25:46,417 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2020-10-29 03:25:46,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-29 03:25:46,417 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2020-10-29 03:25:46,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-29 03:25:46,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 03:25:46,418 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 03:25:46,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 03:25:46,419 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 03:25:46,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 03:25:46,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1670746238, now seen corresponding path program 20 times [2020-10-29 03:25:46,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 03:25:46,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708819938] [2020-10-29 03:25:46,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 03:25:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:25:46,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:46,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:47,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:48,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:50,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:25:51,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:25:51,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-29 03:25:51,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-29 03:25:51,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 03:25:51,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:25:51,442 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:25:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-29 03:25:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-29 03:25:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-29 03:25:51,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:25:52,972 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2020-10-29 03:25:53,465 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-10-29 03:25:54,026 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2020-10-29 03:25:54,271 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 49 [2020-10-29 03:25:54,493 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2020-10-29 03:25:54,720 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2020-10-29 03:25:54,957 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-29 03:25:55,204 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 38 [2020-10-29 03:25:55,419 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-10-29 03:25:55,628 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-29 03:25:55,908 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-29 03:25:56,163 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2020-10-29 03:25:56,438 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-29 03:25:56,699 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-29 03:25:56,988 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-29 03:25:57,283 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-29 03:25:57,567 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2020-10-29 03:25:58,673 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-29 03:25:58,955 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-29 03:25:59,603 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2020-10-29 03:25:59,929 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-29 03:26:00,236 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-29 03:26:00,570 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 45 [2020-10-29 03:26:00,916 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-29 03:26:01,226 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 49 [2020-10-29 03:26:01,559 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-29 03:26:02,144 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2020-10-29 03:26:06,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 03:26:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 03:26:06,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 03:26:06,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 03:26:06,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 03:26:06,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 03:26:06,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 03:26:06,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 03:26:06,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 03:26:06,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 03:26:06,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 03:26:06,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 03:26:06,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 03:26:06,923 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 25 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 03:26:06,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708819938] [2020-10-29 03:26:06,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-29 03:26:06,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-29 03:26:06,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770099335] [2020-10-29 03:26:06,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-29 03:26:06,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 03:26:06,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-29 03:26:06,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=5011, Unknown=0, NotChecked=0, Total=5256 [2020-10-29 03:26:06,927 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 73 states. [2020-10-29 03:26:07,879 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-29 03:26:08,399 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-29 03:26:08,956 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-29 03:26:09,510 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-29 03:26:10,044 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-29 03:26:10,587 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-29 03:26:11,154 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 50 [2020-10-29 03:26:12,074 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-29 03:26:12,841 WARN L193 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-10-29 03:26:13,539 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42 [2020-10-29 03:26:14,225 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2020-10-29 03:26:14,704 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-10-29 03:26:15,696 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-29 03:26:16,232 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-29 03:26:16,839 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-29 03:26:17,814 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-10-29 03:26:18,709 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-29 03:26:19,565 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 52 [2020-10-29 03:26:20,396 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 48 [2020-10-29 03:26:21,701 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 94 [2020-10-29 03:26:22,406 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 77 [2020-10-29 03:26:23,373 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 62 [2020-10-29 03:26:24,443 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 73 [2020-10-29 03:26:25,197 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 23 [2020-10-29 03:26:26,128 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 20 [2020-10-29 03:26:26,676 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 56 [2020-10-29 03:26:27,342 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 45 [2020-10-29 03:26:28,175 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 50 [2020-10-29 03:26:28,860 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 26 [2020-10-29 03:26:29,567 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 47 [2020-10-29 03:26:30,294 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 47 [2020-10-29 03:26:31,068 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 43 [2020-10-29 03:26:31,828 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 32 [2020-10-29 03:26:32,597 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 41 [2020-10-29 03:26:33,437 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 35 [2020-10-29 03:26:34,127 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 36 [2020-10-29 03:26:34,807 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 38 [2020-10-29 03:26:35,491 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 39 [2020-10-29 03:26:36,259 WARN L193 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 45 [2020-10-29 03:26:37,204 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 76 [2020-10-29 03:26:38,536 WARN L193 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 42 [2020-10-29 03:26:39,647 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 47 [2020-10-29 03:26:40,739 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 41 [2020-10-29 03:26:41,961 WARN L193 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 44