/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=DEEPEST --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/float-benchs/Muller_Kahan.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:40:05,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:40:05,245 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:40:05,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:40:05,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:40:05,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:40:05,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:40:05,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:40:05,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:40:05,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:40:05,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:40:05,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:40:05,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:40:05,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:40:05,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:40:05,333 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:40:05,334 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:40:05,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:40:05,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:40:05,350 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:40:05,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:40:05,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:40:05,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:40:05,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:40:05,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:40:05,358 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:40:05,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:40:05,359 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:40:05,360 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:40:05,361 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:40:05,361 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:40:05,362 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:40:05,363 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:40:05,364 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:40:05,365 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:40:05,365 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:40:05,366 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:40:05,366 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:40:05,367 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:40:05,368 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:40:05,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:40:05,369 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 [2020-10-27 19:40:05,394 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:40:05,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:40:05,396 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:40:05,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:40:05,397 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:40:05,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:40:05,397 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:40:05,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:40:05,398 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:40:05,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:40:05,398 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:40:05,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:40:05,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:40:05,399 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:40:05,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:40:05,399 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:40:05,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:40:05,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:40:05,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:40:05,400 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:40:05,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:40:05,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:40:05,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:40:05,401 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:40:05,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:40:05,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:40:05,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:40:05,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:40:05,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:40:05,403 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:40:05,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:40:05,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:40:05,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:40:05,797 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:40:05,798 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:40:05,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/Muller_Kahan.c [2020-10-27 19:40:05,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f38dda30/e3d7708972794999855d20102d6900bb/FLAG642159464 [2020-10-27 19:40:06,445 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:40:06,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/Muller_Kahan.c [2020-10-27 19:40:06,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f38dda30/e3d7708972794999855d20102d6900bb/FLAG642159464 [2020-10-27 19:40:06,826 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7f38dda30/e3d7708972794999855d20102d6900bb [2020-10-27 19:40:06,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:40:06,837 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:40:06,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:40:06,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:40:06,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:40:06,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:40:06" (1/1) ... [2020-10-27 19:40:06,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e736ed8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:06, skipping insertion in model container [2020-10-27 19:40:06,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:40:06" (1/1) ... [2020-10-27 19:40:06,864 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:40:06,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:40:07,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:40:07,068 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:40:07,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:40:07,106 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:40:07,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:07 WrapperNode [2020-10-27 19:40:07,106 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:40:07,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:40:07,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:40:07,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:40:07,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:07" (1/1) ... [2020-10-27 19:40:07,125 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:07" (1/1) ... [2020-10-27 19:40:07,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:07" (1/1) ... [2020-10-27 19:40:07,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:07" (1/1) ... [2020-10-27 19:40:07,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:07" (1/1) ... [2020-10-27 19:40:07,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:07" (1/1) ... [2020-10-27 19:40:07,170 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:07" (1/1) ... [2020-10-27 19:40:07,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:40:07,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:40:07,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:40:07,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:40:07,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:07" (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 [2020-10-27 19:40:07,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:40:07,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:40:07,256 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:40:07,257 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 19:40:07,257 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:40:07,257 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:40:07,258 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:40:07,258 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:40:07,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:40:07,258 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 19:40:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:40:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:40:07,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:40:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:40:07,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:40:07,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:40:07,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:40:07,613 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:40:07,614 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 19:40:07,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:40:07 BoogieIcfgContainer [2020-10-27 19:40:07,621 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:40:07,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:40:07,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:40:07,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:40:07,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:40:06" (1/3) ... [2020-10-27 19:40:07,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b9f8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:40:07, skipping insertion in model container [2020-10-27 19:40:07,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:40:07" (2/3) ... [2020-10-27 19:40:07,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b9f8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:40:07, skipping insertion in model container [2020-10-27 19:40:07,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:40:07" (3/3) ... [2020-10-27 19:40:07,642 INFO L111 eAbstractionObserver]: Analyzing ICFG Muller_Kahan.c [2020-10-27 19:40:07,660 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:40:07,665 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:40:07,679 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:40:07,706 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:40:07,706 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:40:07,706 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:40:07,707 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:40:07,707 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:40:07,707 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:40:07,707 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:40:07,707 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:40:07,723 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-10-27 19:40:07,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 19:40:07,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:07,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:07,750 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:07,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:07,785 INFO L82 PathProgramCache]: Analyzing trace with hash 943003376, now seen corresponding path program 1 times [2020-10-27 19:40:07,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:07,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859360759] [2020-10-27 19:40:07,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:07,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:08,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:08,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 19:40:08,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:08,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-27 19:40:08,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:08,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:08,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 19:40:08,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:08,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:40:08,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:08,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:08,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:08,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:08,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:08,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 19:40:08,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:08,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:08,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:08,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:08,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:08,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859360759] [2020-10-27 19:40:08,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:40:08,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 19:40:08,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066560909] [2020-10-27 19:40:08,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 19:40:08,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:08,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 19:40:08,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:40:08,188 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-10-27 19:40:08,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:08,280 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-10-27 19:40:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 19:40:08,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 19:40:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:08,289 INFO L225 Difference]: With dead ends: 37 [2020-10-27 19:40:08,290 INFO L226 Difference]: Without dead ends: 14 [2020-10-27 19:40:08,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 19:40:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-27 19:40:08,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-27 19:40:08,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-27 19:40:08,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-10-27 19:40:08,352 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-10-27 19:40:08,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:08,353 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-10-27 19:40:08,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 19:40:08,353 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-10-27 19:40:08,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 19:40:08,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:08,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:08,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:40:08,355 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:08,357 INFO L82 PathProgramCache]: Analyzing trace with hash 771228470, now seen corresponding path program 1 times [2020-10-27 19:40:08,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:08,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660374524] [2020-10-27 19:40:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:08,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:08,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:08,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 19:40:08,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:08,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-10-27 19:40:08,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:08,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:40:08,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:08,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:40:08,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:08,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:08,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:08,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:08,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:08,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:08,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 19:40:08,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:08,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:08,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:08,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:08,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:08,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660374524] [2020-10-27 19:40:08,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:40:08,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:40:08,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643679277] [2020-10-27 19:40:08,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:40:08,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:08,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:40:08,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:40:08,632 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 4 states. [2020-10-27 19:40:08,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:08,713 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-10-27 19:40:08,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:40:08,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 19:40:08,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:08,714 INFO L225 Difference]: With dead ends: 22 [2020-10-27 19:40:08,715 INFO L226 Difference]: Without dead ends: 16 [2020-10-27 19:40:08,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:40:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-27 19:40:08,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-27 19:40:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 19:40:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-27 19:40:08,725 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-10-27 19:40:08,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:08,725 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-27 19:40:08,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:40:08,725 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-27 19:40:08,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 19:40:08,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:08,726 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:08,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:40:08,727 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:08,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1042690312, now seen corresponding path program 1 times [2020-10-27 19:40:08,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:08,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910756902] [2020-10-27 19:40:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:08,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:08,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:08,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:40:08,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:08,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-27 19:40:08,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:08,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:40:08,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:08,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 19:40:08,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:08,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:08,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:08,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:08,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:08,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:08,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 19:40:08,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:08,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:08,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:08,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:08,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:40:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:08,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910756902] [2020-10-27 19:40:08,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:08,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 19:40:08,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053446286] [2020-10-27 19:40:08,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:40:08,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:08,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:40:08,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:40:08,987 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-10-27 19:40:09,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:09,138 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-27 19:40:09,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:40:09,139 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-27 19:40:09,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:09,140 INFO L225 Difference]: With dead ends: 24 [2020-10-27 19:40:09,140 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 19:40:09,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:40:09,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 19:40:09,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-27 19:40:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 19:40:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-27 19:40:09,148 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-27 19:40:09,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:09,148 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-27 19:40:09,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:40:09,149 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-27 19:40:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 19:40:09,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:09,150 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:09,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:40:09,150 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:09,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:09,151 INFO L82 PathProgramCache]: Analyzing trace with hash -461917638, now seen corresponding path program 2 times [2020-10-27 19:40:09,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:09,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441652226] [2020-10-27 19:40:09,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:09,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:09,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:09,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 19:40:09,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:09,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-27 19:40:09,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:09,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:40:09,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:09,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:40:09,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:09,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:09,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:09,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:09,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:09,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:09,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 19:40:09,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:09,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:09,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:09,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:40:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:09,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441652226] [2020-10-27 19:40:09,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:09,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 19:40:09,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033602220] [2020-10-27 19:40:09,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:40:09,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:09,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:40:09,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:40:09,419 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-10-27 19:40:09,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:09,602 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-27 19:40:09,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 19:40:09,604 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 19:40:09,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:09,605 INFO L225 Difference]: With dead ends: 26 [2020-10-27 19:40:09,605 INFO L226 Difference]: Without dead ends: 20 [2020-10-27 19:40:09,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:40:09,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-27 19:40:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-27 19:40:09,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 19:40:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-27 19:40:09,615 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-10-27 19:40:09,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:09,615 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-27 19:40:09,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:40:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-27 19:40:09,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 19:40:09,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:09,618 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:09,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:40:09,621 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:09,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:09,622 INFO L82 PathProgramCache]: Analyzing trace with hash -685126404, now seen corresponding path program 3 times [2020-10-27 19:40:09,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:09,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81266730] [2020-10-27 19:40:09,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:09,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:09,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:09,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 19:40:09,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:09,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 19:40:09,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:09,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 19:40:09,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:09,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 19:40:09,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:09,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:09,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:09,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:09,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:09,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:09,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:09,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:40:09,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:09,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:09,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:09,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:09,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:09,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81266730] [2020-10-27 19:40:09,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:09,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 19:40:09,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433887287] [2020-10-27 19:40:09,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 19:40:09,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:09,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 19:40:09,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 19:40:09,850 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-10-27 19:40:10,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:10,051 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-27 19:40:10,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:40:10,052 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-27 19:40:10,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:10,053 INFO L225 Difference]: With dead ends: 28 [2020-10-27 19:40:10,053 INFO L226 Difference]: Without dead ends: 22 [2020-10-27 19:40:10,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:40:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-27 19:40:10,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-27 19:40:10,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-27 19:40:10,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-27 19:40:10,060 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-27 19:40:10,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:10,060 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-27 19:40:10,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 19:40:10,060 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-27 19:40:10,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 19:40:10,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:10,061 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:10,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:40:10,062 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:10,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:10,062 INFO L82 PathProgramCache]: Analyzing trace with hash -440385730, now seen corresponding path program 4 times [2020-10-27 19:40:10,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:10,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141748119] [2020-10-27 19:40:10,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:10,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:10,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:10,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:40:10,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:10,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-27 19:40:10,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:10,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:40:10,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:10,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 19:40:10,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:10,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:10,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:10,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:10,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:10,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:10,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:40:10,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:10,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:10,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:10,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:10,245 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:10,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141748119] [2020-10-27 19:40:10,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:10,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:40:10,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884642787] [2020-10-27 19:40:10,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:40:10,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:10,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:40:10,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:40:10,252 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-10-27 19:40:10,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:10,480 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-27 19:40:10,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:40:10,480 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-27 19:40:10,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:10,481 INFO L225 Difference]: With dead ends: 30 [2020-10-27 19:40:10,481 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 19:40:10,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:40:10,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 19:40:10,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-27 19:40:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-27 19:40:10,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-27 19:40:10,488 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-27 19:40:10,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:10,488 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-27 19:40:10,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:40:10,488 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-27 19:40:10,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:40:10,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:10,489 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:10,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:40:10,490 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:10,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:10,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1467799296, now seen corresponding path program 5 times [2020-10-27 19:40:10,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:10,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587088148] [2020-10-27 19:40:10,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:10,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:10,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:10,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 19:40:10,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:10,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-27 19:40:10,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:10,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:40:10,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:10,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 19:40:10,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:10,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:10,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:10,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:10,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:10,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:10,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:40:10,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:10,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:10,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:10,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:10,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:10,682 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:10,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587088148] [2020-10-27 19:40:10,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:10,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:40:10,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044394032] [2020-10-27 19:40:10,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:40:10,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:10,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:40:10,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:40:10,684 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-10-27 19:40:10,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:10,976 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-27 19:40:10,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:40:10,976 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-27 19:40:10,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:10,978 INFO L225 Difference]: With dead ends: 32 [2020-10-27 19:40:10,978 INFO L226 Difference]: Without dead ends: 26 [2020-10-27 19:40:10,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:40:10,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-27 19:40:10,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-27 19:40:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 19:40:10,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-27 19:40:10,988 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-27 19:40:10,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:10,989 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-27 19:40:10,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:40:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-27 19:40:10,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 19:40:10,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:10,990 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:10,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:40:10,991 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:10,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:10,991 INFO L82 PathProgramCache]: Analyzing trace with hash -969758142, now seen corresponding path program 6 times [2020-10-27 19:40:10,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:10,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873439330] [2020-10-27 19:40:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:11,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:11,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:11,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:11,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:40:11,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:11,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 112 [2020-10-27 19:40:11,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:11,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:40:11,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:11,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:40:11,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:11,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:11,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:11,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:11,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:11,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:11,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:11,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:40:11,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:11,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:11,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:11,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:11,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:11,239 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:11,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873439330] [2020-10-27 19:40:11,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:11,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:40:11,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172217452] [2020-10-27 19:40:11,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:40:11,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:11,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:40:11,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:40:11,242 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-10-27 19:40:11,600 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-27 19:40:11,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:11,642 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-27 19:40:11,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:40:11,642 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-27 19:40:11,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:11,643 INFO L225 Difference]: With dead ends: 34 [2020-10-27 19:40:11,645 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 19:40:11,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:40:11,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 19:40:11,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-27 19:40:11,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 19:40:11,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-27 19:40:11,660 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-27 19:40:11,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:11,661 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-27 19:40:11,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:40:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-27 19:40:11,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:40:11,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:11,665 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:11,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:40:11,665 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:11,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:11,666 INFO L82 PathProgramCache]: Analyzing trace with hash 906420996, now seen corresponding path program 7 times [2020-10-27 19:40:11,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:11,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947974746] [2020-10-27 19:40:11,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:11,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:11,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:11,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-27 19:40:11,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:11,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-27 19:40:11,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:11,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:40:11,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:11,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:40:11,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:40:11,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:11,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:11,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:11,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:11,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:11,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:40:11,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:11,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:11,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:11,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:11,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:11,983 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:11,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947974746] [2020-10-27 19:40:11,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:11,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:40:11,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951542008] [2020-10-27 19:40:11,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:40:11,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:11,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:40:11,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:40:11,991 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-10-27 19:40:12,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:12,466 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-27 19:40:12,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:40:12,466 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-27 19:40:12,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:12,468 INFO L225 Difference]: With dead ends: 36 [2020-10-27 19:40:12,468 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 19:40:12,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:40:12,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 19:40:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-27 19:40:12,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 19:40:12,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-27 19:40:12,480 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-10-27 19:40:12,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:12,481 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-27 19:40:12,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:40:12,481 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-27 19:40:12,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-27 19:40:12,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:12,482 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:12,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:40:12,482 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:12,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:12,483 INFO L82 PathProgramCache]: Analyzing trace with hash 28308294, now seen corresponding path program 8 times [2020-10-27 19:40:12,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:12,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26062849] [2020-10-27 19:40:12,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:12,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:12,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:12,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:40:12,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:12,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-27 19:40:12,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:12,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:40:12,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:12,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:40:12,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:12,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:12,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:12,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:12,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:12,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:12,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:12,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:40:12,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:12,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:12,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:12,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:12,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:12,833 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:12,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26062849] [2020-10-27 19:40:12,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:12,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:40:12,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464441295] [2020-10-27 19:40:12,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:40:12,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:12,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:40:12,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:40:12,836 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-10-27 19:40:13,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:13,277 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-27 19:40:13,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:40:13,278 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-27 19:40:13,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:13,279 INFO L225 Difference]: With dead ends: 38 [2020-10-27 19:40:13,279 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 19:40:13,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:40:13,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 19:40:13,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-27 19:40:13,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-27 19:40:13,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-27 19:40:13,286 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-10-27 19:40:13,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:13,287 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-27 19:40:13,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:40:13,287 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-27 19:40:13,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:40:13,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:13,288 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:13,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:40:13,288 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:13,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:13,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2024408312, now seen corresponding path program 9 times [2020-10-27 19:40:13,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:13,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43440763] [2020-10-27 19:40:13,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:13,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:13,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:13,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:13,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 19:40:13,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:13,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-27 19:40:13,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:13,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:40:13,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:13,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:40:13,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:13,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:13,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:13,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:13,558 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:13,558 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:13,558 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:40:13,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:13,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:13,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:13,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:13,559 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:13,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43440763] [2020-10-27 19:40:13,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:13,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:40:13,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581301973] [2020-10-27 19:40:13,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:40:13,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:13,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:40:13,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:40:13,565 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 13 states. [2020-10-27 19:40:14,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:14,060 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-27 19:40:14,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:40:14,061 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-27 19:40:14,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:14,062 INFO L225 Difference]: With dead ends: 40 [2020-10-27 19:40:14,062 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 19:40:14,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:40:14,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 19:40:14,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-27 19:40:14,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 19:40:14,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-27 19:40:14,070 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-10-27 19:40:14,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:14,070 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-27 19:40:14,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:40:14,070 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-27 19:40:14,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 19:40:14,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:14,071 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:14,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:40:14,072 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:14,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:14,072 INFO L82 PathProgramCache]: Analyzing trace with hash 999889482, now seen corresponding path program 10 times [2020-10-27 19:40:14,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:14,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620040020] [2020-10-27 19:40:14,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:14,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:14,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:14,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:40:14,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:14,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-27 19:40:14,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:14,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:40:14,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:14,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 19:40:14,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:14,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:14,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:14,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:14,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:14,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:14,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:40:14,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:14,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:14,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:14,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:14,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:14,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620040020] [2020-10-27 19:40:14,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:14,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:40:14,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34445033] [2020-10-27 19:40:14,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:40:14,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:14,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:40:14,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:40:14,370 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-10-27 19:40:14,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:14,913 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-27 19:40:14,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:40:14,913 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-27 19:40:14,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:14,915 INFO L225 Difference]: With dead ends: 42 [2020-10-27 19:40:14,915 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 19:40:14,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:40:14,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 19:40:14,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-27 19:40:14,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 19:40:14,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-27 19:40:14,926 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-10-27 19:40:14,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:14,927 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-27 19:40:14,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:40:14,927 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-27 19:40:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:40:14,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:14,928 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:14,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:40:14,928 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:14,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:14,929 INFO L82 PathProgramCache]: Analyzing trace with hash -342789876, now seen corresponding path program 11 times [2020-10-27 19:40:14,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:14,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092014830] [2020-10-27 19:40:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:14,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:15,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:15,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 19:40:15,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:15,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-10-27 19:40:15,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:15,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:40:15,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:15,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 19:40:15,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:15,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:15,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:15,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:15,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:15,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:15,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 19:40:15,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:15,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:15,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:15,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:15,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:15,324 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:15,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092014830] [2020-10-27 19:40:15,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:15,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:40:15,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146717004] [2020-10-27 19:40:15,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:40:15,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:15,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:40:15,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:40:15,327 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 15 states. [2020-10-27 19:40:15,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:15,941 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-27 19:40:15,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:40:15,941 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-27 19:40:15,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:15,943 INFO L225 Difference]: With dead ends: 44 [2020-10-27 19:40:15,943 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 19:40:15,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:40:15,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 19:40:15,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-27 19:40:15,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 19:40:15,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-27 19:40:15,950 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-10-27 19:40:15,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:15,951 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-27 19:40:15,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:40:15,951 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-27 19:40:15,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 19:40:15,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:15,952 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:15,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:40:15,952 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:15,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:15,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2127503182, now seen corresponding path program 12 times [2020-10-27 19:40:15,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:15,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065039982] [2020-10-27 19:40:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:15,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:16,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:16,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:40:16,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:16,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-27 19:40:16,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:16,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:40:16,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:16,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 19:40:16,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:16,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:16,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:16,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:16,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:16,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:16,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:40:16,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:16,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:16,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:16,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:16,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:16,370 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:16,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065039982] [2020-10-27 19:40:16,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:16,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:40:16,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848219774] [2020-10-27 19:40:16,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:40:16,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:16,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:40:16,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:40:16,373 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2020-10-27 19:40:17,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:17,036 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-27 19:40:17,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:40:17,037 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-27 19:40:17,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:17,038 INFO L225 Difference]: With dead ends: 46 [2020-10-27 19:40:17,038 INFO L226 Difference]: Without dead ends: 40 [2020-10-27 19:40:17,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:40:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-27 19:40:17,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-27 19:40:17,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-27 19:40:17,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-27 19:40:17,047 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-10-27 19:40:17,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:17,048 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-27 19:40:17,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:40:17,048 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-27 19:40:17,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:40:17,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:17,050 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:17,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:40:17,050 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:17,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:17,051 INFO L82 PathProgramCache]: Analyzing trace with hash 962217232, now seen corresponding path program 13 times [2020-10-27 19:40:17,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:17,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256934129] [2020-10-27 19:40:17,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:17,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:17,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:17,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-27 19:40:17,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:17,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-27 19:40:17,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:17,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:40:17,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:17,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:40:17,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:17,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:17,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:17,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:17,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:17,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:17,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:40:17,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:17,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:17,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:17,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:17,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:17,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256934129] [2020-10-27 19:40:17,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:17,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:40:17,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837816482] [2020-10-27 19:40:17,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:40:17,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:17,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:40:17,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:40:17,537 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 17 states. [2020-10-27 19:40:18,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:18,200 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-27 19:40:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:40:18,201 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-27 19:40:18,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:18,203 INFO L225 Difference]: With dead ends: 48 [2020-10-27 19:40:18,203 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 19:40:18,204 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:40:18,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 19:40:18,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-27 19:40:18,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-27 19:40:18,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-27 19:40:18,219 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-10-27 19:40:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:18,219 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-27 19:40:18,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:40:18,219 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-27 19:40:18,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 19:40:18,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:18,220 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:18,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:40:18,221 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:18,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:18,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2108883538, now seen corresponding path program 14 times [2020-10-27 19:40:18,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:18,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038668567] [2020-10-27 19:40:18,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:18,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:18,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:18,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 19:40:18,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:18,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-10-27 19:40:18,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:18,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:40:18,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:18,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:40:18,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:18,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:18,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:18,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:18,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:18,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:18,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:40:18,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:18,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:18,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:18,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:18,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:18,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038668567] [2020-10-27 19:40:18,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:18,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:40:18,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689584678] [2020-10-27 19:40:18,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:40:18,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:18,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:40:18,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:40:18,771 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 18 states. [2020-10-27 19:40:19,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:19,495 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-27 19:40:19,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:40:19,496 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-27 19:40:19,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:19,497 INFO L225 Difference]: With dead ends: 50 [2020-10-27 19:40:19,497 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 19:40:19,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 19:40:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 19:40:19,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-27 19:40:19,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 19:40:19,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-27 19:40:19,505 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-10-27 19:40:19,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:19,505 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-27 19:40:19,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:40:19,505 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-27 19:40:19,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 19:40:19,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:19,506 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:19,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:40:19,507 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:19,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:19,507 INFO L82 PathProgramCache]: Analyzing trace with hash 248608532, now seen corresponding path program 15 times [2020-10-27 19:40:19,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:19,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651198892] [2020-10-27 19:40:19,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:19,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:19,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:19,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 19:40:19,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:19,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 210 [2020-10-27 19:40:19,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:19,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 19:40:19,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:19,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:40:19,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:19,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:19,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:19,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:19,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:19,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:19,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:40:19,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:19,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:19,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:19,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:19,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:19,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651198892] [2020-10-27 19:40:19,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:19,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 19:40:19,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397014938] [2020-10-27 19:40:20,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 19:40:20,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:20,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 19:40:20,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:40:20,005 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 19 states. [2020-10-27 19:40:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:20,847 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-27 19:40:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 19:40:20,848 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-27 19:40:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:20,849 INFO L225 Difference]: With dead ends: 52 [2020-10-27 19:40:20,849 INFO L226 Difference]: Without dead ends: 46 [2020-10-27 19:40:20,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 19:40:20,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-27 19:40:20,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-27 19:40:20,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 19:40:20,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-27 19:40:20,860 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-10-27 19:40:20,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:20,861 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-27 19:40:20,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 19:40:20,861 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-27 19:40:20,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 19:40:20,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:20,862 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:20,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:40:20,862 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:20,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:20,863 INFO L82 PathProgramCache]: Analyzing trace with hash -769277098, now seen corresponding path program 16 times [2020-10-27 19:40:20,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:20,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759150377] [2020-10-27 19:40:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:20,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:21,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:21,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 19:40:21,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:21,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-27 19:40:21,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:21,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 19:40:21,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:21,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 19:40:21,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:21,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:21,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:21,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:21,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:21,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:21,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:40:21,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:21,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:21,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:21,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:21,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:21,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759150377] [2020-10-27 19:40:21,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:21,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 19:40:21,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425277062] [2020-10-27 19:40:21,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 19:40:21,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:21,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 19:40:21,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:40:21,378 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 20 states. [2020-10-27 19:40:22,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:22,246 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-27 19:40:22,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:40:22,247 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-27 19:40:22,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:22,248 INFO L225 Difference]: With dead ends: 54 [2020-10-27 19:40:22,248 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 19:40:22,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 19:40:22,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 19:40:22,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-27 19:40:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 19:40:22,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-27 19:40:22,258 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-10-27 19:40:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:22,258 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-27 19:40:22,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 19:40:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-27 19:40:22,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 19:40:22,259 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:22,259 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:22,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:40:22,259 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:22,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:22,260 INFO L82 PathProgramCache]: Analyzing trace with hash 295175960, now seen corresponding path program 17 times [2020-10-27 19:40:22,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:22,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894550599] [2020-10-27 19:40:22,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:22,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:22,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:22,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 19:40:22,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:22,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 250 [2020-10-27 19:40:22,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:22,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 19:40:22,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:22,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 19:40:22,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:22,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:22,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:22,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:22,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:22,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:22,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:40:22,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:22,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:22,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:22,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:22,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:22,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894550599] [2020-10-27 19:40:22,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:22,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 19:40:22,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236540367] [2020-10-27 19:40:22,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 19:40:22,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:22,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 19:40:22,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:40:22,835 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 21 states. [2020-10-27 19:40:23,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:23,739 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-27 19:40:23,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:40:23,739 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-27 19:40:23,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:23,740 INFO L225 Difference]: With dead ends: 56 [2020-10-27 19:40:23,740 INFO L226 Difference]: Without dead ends: 50 [2020-10-27 19:40:23,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 19:40:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-27 19:40:23,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-27 19:40:23,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-27 19:40:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-27 19:40:23,749 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-10-27 19:40:23,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:23,749 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-27 19:40:23,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 19:40:23,749 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-27 19:40:23,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 19:40:23,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:23,750 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:23,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:40:23,750 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:23,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:23,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1032348250, now seen corresponding path program 18 times [2020-10-27 19:40:23,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:23,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489434487] [2020-10-27 19:40:23,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:23,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:24,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:24,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 19:40:24,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:24,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 253 [2020-10-27 19:40:24,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:24,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 19:40:24,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:24,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 19:40:24,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:24,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:24,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:24,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:24,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:24,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:24,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:40:24,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:24,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:24,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:24,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:24,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:24,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489434487] [2020-10-27 19:40:24,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:24,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 19:40:24,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818065716] [2020-10-27 19:40:24,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 19:40:24,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:24,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 19:40:24,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 19:40:24,354 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 22 states. [2020-10-27 19:40:25,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:25,341 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-27 19:40:25,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:40:25,342 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-27 19:40:25,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:25,343 INFO L225 Difference]: With dead ends: 58 [2020-10-27 19:40:25,343 INFO L226 Difference]: Without dead ends: 52 [2020-10-27 19:40:25,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 19:40:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-27 19:40:25,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-27 19:40:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-27 19:40:25,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-27 19:40:25,351 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-10-27 19:40:25,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:25,352 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-27 19:40:25,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 19:40:25,352 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-27 19:40:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:40:25,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:25,353 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:25,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:40:25,353 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:25,353 INFO L82 PathProgramCache]: Analyzing trace with hash 785315100, now seen corresponding path program 19 times [2020-10-27 19:40:25,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:25,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743822431] [2020-10-27 19:40:25,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:25,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:25,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:25,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 19:40:25,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:25,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-10-27 19:40:25,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:25,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 19:40:25,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:25,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 19:40:25,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:25,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:25,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:25,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:25,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:25,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:25,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:40:25,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:25,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:25,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:25,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:25,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:26,002 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:26,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743822431] [2020-10-27 19:40:26,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:26,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 19:40:26,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727719128] [2020-10-27 19:40:26,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 19:40:26,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:26,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 19:40:26,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:40:26,008 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 23 states. [2020-10-27 19:40:27,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:27,072 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-27 19:40:27,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 19:40:27,072 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-27 19:40:27,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:27,073 INFO L225 Difference]: With dead ends: 60 [2020-10-27 19:40:27,073 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 19:40:27,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 19:40:27,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 19:40:27,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-27 19:40:27,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-27 19:40:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-27 19:40:27,081 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-10-27 19:40:27,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:27,082 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-27 19:40:27,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 19:40:27,082 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-27 19:40:27,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 19:40:27,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:27,083 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:27,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:40:27,083 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:27,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:27,084 INFO L82 PathProgramCache]: Analyzing trace with hash -390340770, now seen corresponding path program 20 times [2020-10-27 19:40:27,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:27,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503600221] [2020-10-27 19:40:27,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:27,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:27,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:27,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-27 19:40:27,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:27,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 288 [2020-10-27 19:40:27,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 19:40:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 19:40:27,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:27,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:27,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:27,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:27,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:27,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:27,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:40:27,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:27,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:27,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:27,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:27,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:27,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503600221] [2020-10-27 19:40:27,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:27,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 19:40:27,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450512110] [2020-10-27 19:40:27,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 19:40:27,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:27,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 19:40:27,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:40:27,767 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 24 states. [2020-10-27 19:40:28,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:28,857 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-27 19:40:28,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 19:40:28,858 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-27 19:40:28,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:28,858 INFO L225 Difference]: With dead ends: 62 [2020-10-27 19:40:28,858 INFO L226 Difference]: Without dead ends: 56 [2020-10-27 19:40:28,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 19:40:28,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-27 19:40:28,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-27 19:40:28,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 19:40:28,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-27 19:40:28,866 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-10-27 19:40:28,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:28,866 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-27 19:40:28,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 19:40:28,866 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-27 19:40:28,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 19:40:28,867 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:28,868 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:28,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:40:28,868 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:28,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:28,868 INFO L82 PathProgramCache]: Analyzing trace with hash -619232992, now seen corresponding path program 21 times [2020-10-27 19:40:28,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:28,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102251584] [2020-10-27 19:40:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:28,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:29,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:29,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 19:40:29,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:29,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 301 [2020-10-27 19:40:29,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:29,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 19:40:29,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:29,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 19:40:29,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:29,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:29,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:29,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:29,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:29,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:29,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:40:29,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:29,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:29,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:29,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:29,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:29,585 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:29,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102251584] [2020-10-27 19:40:29,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:29,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 19:40:29,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899118200] [2020-10-27 19:40:29,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 19:40:29,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:29,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 19:40:29,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 19:40:29,587 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 25 states. [2020-10-27 19:40:30,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:30,724 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-27 19:40:30,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 19:40:30,725 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-27 19:40:30,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:30,726 INFO L225 Difference]: With dead ends: 64 [2020-10-27 19:40:30,726 INFO L226 Difference]: Without dead ends: 58 [2020-10-27 19:40:30,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 19:40:30,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-27 19:40:30,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-27 19:40:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-27 19:40:30,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-27 19:40:30,745 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-10-27 19:40:30,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:30,746 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-27 19:40:30,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 19:40:30,746 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-27 19:40:30,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 19:40:30,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:30,747 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:30,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 19:40:30,747 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:30,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:30,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1541326238, now seen corresponding path program 22 times [2020-10-27 19:40:30,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:30,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855473952] [2020-10-27 19:40:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:30,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:30,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:31,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:31,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 19:40:31,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:31,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-27 19:40:31,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:31,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 19:40:31,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:31,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 19:40:31,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:31,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:31,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:31,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:31,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:31,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:31,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:40:31,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:31,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:31,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:31,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:31,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:31,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855473952] [2020-10-27 19:40:31,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:31,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 19:40:31,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915250867] [2020-10-27 19:40:31,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 19:40:31,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:31,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 19:40:31,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:40:31,611 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 26 states. [2020-10-27 19:40:32,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:32,886 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-27 19:40:32,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 19:40:32,886 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-27 19:40:32,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:32,887 INFO L225 Difference]: With dead ends: 66 [2020-10-27 19:40:32,887 INFO L226 Difference]: Without dead ends: 60 [2020-10-27 19:40:32,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 19:40:32,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-27 19:40:32,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-27 19:40:32,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 19:40:32,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-27 19:40:32,896 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-10-27 19:40:32,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:32,896 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-27 19:40:32,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 19:40:32,897 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-27 19:40:32,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-27 19:40:32,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:32,897 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:32,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 19:40:32,898 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:32,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:32,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1385294628, now seen corresponding path program 23 times [2020-10-27 19:40:32,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:32,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878411679] [2020-10-27 19:40:32,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:32,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:33,243 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:33,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 19:40:33,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:33,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-10-27 19:40:33,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:33,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 19:40:33,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:33,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 19:40:33,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:33,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:33,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:33,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:33,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:33,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:33,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:40:33,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:33,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:33,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:33,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:33,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:33,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878411679] [2020-10-27 19:40:33,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:33,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 19:40:33,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852642777] [2020-10-27 19:40:33,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 19:40:33,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:33,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 19:40:33,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 19:40:33,714 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 27 states. [2020-10-27 19:40:35,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:35,082 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-27 19:40:35,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 19:40:35,082 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-27 19:40:35,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:35,083 INFO L225 Difference]: With dead ends: 68 [2020-10-27 19:40:35,083 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 19:40:35,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 19:40:35,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 19:40:35,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-27 19:40:35,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 19:40:35,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-27 19:40:35,091 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-10-27 19:40:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:35,091 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-27 19:40:35,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 19:40:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-27 19:40:35,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 19:40:35,092 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:35,092 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:35,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 19:40:35,092 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:35,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:35,093 INFO L82 PathProgramCache]: Analyzing trace with hash 664367974, now seen corresponding path program 24 times [2020-10-27 19:40:35,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:35,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986236874] [2020-10-27 19:40:35,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:35,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:35,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:35,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:35,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 19:40:35,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:35,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 373 [2020-10-27 19:40:35,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:35,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 19:40:35,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:35,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 19:40:35,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:35,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:36,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:36,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:36,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:36,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:36,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:40:36,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:36,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:36,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:36,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:36,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:36,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986236874] [2020-10-27 19:40:36,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:36,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 19:40:36,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838366192] [2020-10-27 19:40:36,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 19:40:36,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:36,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 19:40:36,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:40:36,019 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 28 states. [2020-10-27 19:40:37,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:37,398 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-27 19:40:37,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 19:40:37,398 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-27 19:40:37,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:37,399 INFO L225 Difference]: With dead ends: 70 [2020-10-27 19:40:37,400 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 19:40:37,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 19:40:37,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 19:40:37,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-27 19:40:37,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 19:40:37,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-27 19:40:37,408 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-10-27 19:40:37,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:37,408 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-27 19:40:37,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 19:40:37,408 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-27 19:40:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 19:40:37,409 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:37,409 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:37,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 19:40:37,409 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:37,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:37,410 INFO L82 PathProgramCache]: Analyzing trace with hash -656411864, now seen corresponding path program 25 times [2020-10-27 19:40:37,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:37,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748890422] [2020-10-27 19:40:37,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:37,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:37,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:37,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 19:40:37,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:37,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 423 [2020-10-27 19:40:37,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:37,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 19:40:37,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:37,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 19:40:37,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:38,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:38,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:38,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:38,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:38,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:38,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:40:38,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:38,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:38,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:38,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:38,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:38,404 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:38,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748890422] [2020-10-27 19:40:38,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:38,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 19:40:38,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475657505] [2020-10-27 19:40:38,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 19:40:38,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:38,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 19:40:38,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 19:40:38,406 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 29 states. [2020-10-27 19:40:39,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:39,956 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-27 19:40:39,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 19:40:39,957 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-27 19:40:39,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:39,958 INFO L225 Difference]: With dead ends: 72 [2020-10-27 19:40:39,958 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 19:40:39,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 19:40:39,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 19:40:39,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-27 19:40:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 19:40:39,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-10-27 19:40:39,966 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-10-27 19:40:39,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:39,966 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-10-27 19:40:39,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 19:40:39,966 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-10-27 19:40:39,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 19:40:39,967 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:39,967 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:39,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 19:40:39,967 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:39,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:39,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1384483434, now seen corresponding path program 26 times [2020-10-27 19:40:39,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:39,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220427474] [2020-10-27 19:40:39,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:39,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:39,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:40,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:40,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 19:40:40,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:40,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 427 [2020-10-27 19:40:40,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:40,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 19:40:40,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:40,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 19:40:40,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:40,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:40,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:40,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:40,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:40,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:40,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:40:40,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:40,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:40,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:40,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:40,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:40,993 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:40,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220427474] [2020-10-27 19:40:40,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:40,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 19:40:40,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183151287] [2020-10-27 19:40:40,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 19:40:40,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:40,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 19:40:40,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 19:40:40,996 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 30 states. [2020-10-27 19:40:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:42,588 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-27 19:40:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 19:40:42,589 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-10-27 19:40:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:42,589 INFO L225 Difference]: With dead ends: 74 [2020-10-27 19:40:42,590 INFO L226 Difference]: Without dead ends: 68 [2020-10-27 19:40:42,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 19:40:42,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-27 19:40:42,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-27 19:40:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 19:40:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-27 19:40:42,597 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-10-27 19:40:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:42,597 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-27 19:40:42,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 19:40:42,597 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-27 19:40:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 19:40:42,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:42,598 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:42,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 19:40:42,598 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:42,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:42,599 INFO L82 PathProgramCache]: Analyzing trace with hash -115189460, now seen corresponding path program 27 times [2020-10-27 19:40:42,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:42,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [429354041] [2020-10-27 19:40:42,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:42,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:42,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:43,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:43,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 19:40:43,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:43,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-27 19:40:43,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:43,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 19:40:43,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:43,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 19:40:43,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:43,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:43,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:43,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:43,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:43,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:43,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:43,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:40:43,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:43,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:43,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:43,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:43,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:43,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [429354041] [2020-10-27 19:40:43,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:43,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 19:40:43,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612955562] [2020-10-27 19:40:43,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 19:40:43,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:43,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 19:40:43,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:40:43,902 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 31 states. [2020-10-27 19:40:45,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:45,511 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-27 19:40:45,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 19:40:45,513 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-27 19:40:45,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:45,514 INFO L225 Difference]: With dead ends: 76 [2020-10-27 19:40:45,514 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 19:40:45,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 19:40:45,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 19:40:45,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-27 19:40:45,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-27 19:40:45,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-27 19:40:45,520 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-10-27 19:40:45,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:45,520 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-27 19:40:45,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 19:40:45,520 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-27 19:40:45,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 19:40:45,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:45,521 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:45,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 19:40:45,521 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:45,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:45,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1808170862, now seen corresponding path program 28 times [2020-10-27 19:40:45,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:45,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147761000] [2020-10-27 19:40:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:45,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:46,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:46,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-27 19:40:46,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:46,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 502 [2020-10-27 19:40:46,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 19:40:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:46,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 19:40:46,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:46,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:46,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:46,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:46,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:46,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:46,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:40:46,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:46,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:46,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:46,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:46,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:46,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147761000] [2020-10-27 19:40:46,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:46,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 19:40:46,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212314063] [2020-10-27 19:40:46,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 19:40:46,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:46,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 19:40:46,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 19:40:46,680 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 32 states. [2020-10-27 19:40:48,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:48,487 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-27 19:40:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 19:40:48,487 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-10-27 19:40:48,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:48,488 INFO L225 Difference]: With dead ends: 78 [2020-10-27 19:40:48,488 INFO L226 Difference]: Without dead ends: 72 [2020-10-27 19:40:48,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 19:40:48,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-27 19:40:48,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-27 19:40:48,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 19:40:48,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-27 19:40:48,497 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-10-27 19:40:48,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:48,498 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-27 19:40:48,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 19:40:48,498 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-27 19:40:48,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-27 19:40:48,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:48,499 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:48,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 19:40:48,499 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:48,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:48,499 INFO L82 PathProgramCache]: Analyzing trace with hash -973464272, now seen corresponding path program 29 times [2020-10-27 19:40:48,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:48,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760988999] [2020-10-27 19:40:48,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:48,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:49,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:49,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 19:40:49,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:49,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 558 [2020-10-27 19:40:49,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:49,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 19:40:49,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:49,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 19:40:49,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:49,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:49,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:49,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:49,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:49,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:49,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:40:49,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:49,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:49,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760988999] [2020-10-27 19:40:49,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:49,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 19:40:49,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390240997] [2020-10-27 19:40:49,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 19:40:49,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:49,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 19:40:49,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 19:40:49,930 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 33 states. [2020-10-27 19:40:51,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:51,687 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-27 19:40:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 19:40:51,687 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-27 19:40:51,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:51,689 INFO L225 Difference]: With dead ends: 80 [2020-10-27 19:40:51,689 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 19:40:51,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 19:40:51,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 19:40:51,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-27 19:40:51,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 19:40:51,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-27 19:40:51,696 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-10-27 19:40:51,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:51,696 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-27 19:40:51,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 19:40:51,697 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-27 19:40:51,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 19:40:51,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:51,697 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:51,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 19:40:51,698 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:51,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:51,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1639797362, now seen corresponding path program 30 times [2020-10-27 19:40:51,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:51,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935758286] [2020-10-27 19:40:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:51,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:52,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:52,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 19:40:52,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:52,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 481 [2020-10-27 19:40:52,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:52,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 19:40:52,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:52,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 19:40:52,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:52,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:52,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:52,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:52,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:52,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:52,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:40:52,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:52,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:52,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935758286] [2020-10-27 19:40:52,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:52,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 19:40:52,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3355235] [2020-10-27 19:40:52,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 19:40:52,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:52,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 19:40:52,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 19:40:52,924 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 34 states. [2020-10-27 19:40:54,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:54,861 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-10-27 19:40:54,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 19:40:54,861 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-10-27 19:40:54,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:54,864 INFO L225 Difference]: With dead ends: 82 [2020-10-27 19:40:54,864 INFO L226 Difference]: Without dead ends: 76 [2020-10-27 19:40:54,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-10-27 19:40:54,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-27 19:40:54,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-27 19:40:54,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 19:40:54,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-10-27 19:40:54,875 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-10-27 19:40:54,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:54,875 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-10-27 19:40:54,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 19:40:54,876 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-10-27 19:40:54,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 19:40:54,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:54,876 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:54,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 19:40:54,877 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:54,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:54,877 INFO L82 PathProgramCache]: Analyzing trace with hash 428359476, now seen corresponding path program 31 times [2020-10-27 19:40:54,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:54,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13520204] [2020-10-27 19:40:54,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:54,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:55,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:55,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 19:40:55,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:55,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 485 [2020-10-27 19:40:55,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:55,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 19:40:55,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:55,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 19:40:55,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:56,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:56,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:56,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:56,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:56,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:56,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:40:56,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:56,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:56,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:56,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:56,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:56,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13520204] [2020-10-27 19:40:56,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:56,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 19:40:56,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505337742] [2020-10-27 19:40:56,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 19:40:56,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:56,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 19:40:56,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 19:40:56,089 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 35 states. [2020-10-27 19:40:58,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:40:58,135 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2020-10-27 19:40:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 19:40:58,136 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-27 19:40:58,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:40:58,137 INFO L225 Difference]: With dead ends: 84 [2020-10-27 19:40:58,137 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 19:40:58,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-10-27 19:40:58,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 19:40:58,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-27 19:40:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-27 19:40:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-10-27 19:40:58,145 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-10-27 19:40:58,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:40:58,145 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-10-27 19:40:58,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 19:40:58,145 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-10-27 19:40:58,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 19:40:58,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:40:58,146 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:40:58,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 19:40:58,146 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:40:58,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:40:58,147 INFO L82 PathProgramCache]: Analyzing trace with hash 172688246, now seen corresponding path program 32 times [2020-10-27 19:40:58,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:40:58,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714588096] [2020-10-27 19:40:58,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:40:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:58,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:58,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:58,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 19:40:58,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:58,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 479 [2020-10-27 19:40:58,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:58,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 19:40:58,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:40:58,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 19:40:58,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:59,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:40:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:40:59,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:40:59,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:40:59,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:40:59,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:40:59,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:40:59,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:40:59,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:40:59,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:40:59,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:40:59,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:40:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:40:59,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714588096] [2020-10-27 19:40:59,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:40:59,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 19:40:59,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454717047] [2020-10-27 19:40:59,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 19:40:59,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:40:59,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 19:40:59,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 19:40:59,501 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 36 states. [2020-10-27 19:41:01,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:01,694 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-10-27 19:41:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 19:41:01,695 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-10-27 19:41:01,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:01,696 INFO L225 Difference]: With dead ends: 86 [2020-10-27 19:41:01,696 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 19:41:01,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-10-27 19:41:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 19:41:01,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-27 19:41:01,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 19:41:01,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-10-27 19:41:01,703 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-10-27 19:41:01,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:01,703 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-10-27 19:41:01,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 19:41:01,703 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-10-27 19:41:01,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-27 19:41:01,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:01,704 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:01,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 19:41:01,704 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:01,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:01,705 INFO L82 PathProgramCache]: Analyzing trace with hash -714227912, now seen corresponding path program 33 times [2020-10-27 19:41:01,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:01,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593450599] [2020-10-27 19:41:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:01,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:02,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:02,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 19:41:02,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:02,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 457 [2020-10-27 19:41:02,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:02,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 19:41:02,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:02,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 19:41:02,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:03,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:03,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:03,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:03,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:03,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:03,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:41:03,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:03,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:03,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:03,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:03,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:03,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593450599] [2020-10-27 19:41:03,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:03,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 19:41:03,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693828124] [2020-10-27 19:41:03,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 19:41:03,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:03,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 19:41:03,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 19:41:03,086 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 37 states. [2020-10-27 19:41:05,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:05,379 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-10-27 19:41:05,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 19:41:05,379 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-27 19:41:05,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:05,380 INFO L225 Difference]: With dead ends: 88 [2020-10-27 19:41:05,380 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 19:41:05,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-10-27 19:41:05,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 19:41:05,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-27 19:41:05,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 19:41:05,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-10-27 19:41:05,387 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-10-27 19:41:05,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:05,387 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-10-27 19:41:05,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 19:41:05,388 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-10-27 19:41:05,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 19:41:05,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:05,388 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:05,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 19:41:05,389 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:05,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:05,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1657836154, now seen corresponding path program 34 times [2020-10-27 19:41:05,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:05,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342569109] [2020-10-27 19:41:05,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:05,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:05,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:05,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 19:41:05,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:05,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 518 [2020-10-27 19:41:05,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:05,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 19:41:05,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:05,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 19:41:05,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:06,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:06,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:06,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:06,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:06,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:06,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:41:06,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:06,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:06,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:06,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342569109] [2020-10-27 19:41:06,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:06,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 19:41:06,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847030722] [2020-10-27 19:41:06,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 19:41:06,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:06,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 19:41:06,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 19:41:06,888 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 38 states. [2020-10-27 19:41:09,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:09,230 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-10-27 19:41:09,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 19:41:09,231 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-10-27 19:41:09,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:09,232 INFO L225 Difference]: With dead ends: 90 [2020-10-27 19:41:09,232 INFO L226 Difference]: Without dead ends: 84 [2020-10-27 19:41:09,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-10-27 19:41:09,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-27 19:41:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-27 19:41:09,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 19:41:09,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-10-27 19:41:09,240 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-10-27 19:41:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:09,240 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-10-27 19:41:09,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 19:41:09,241 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-10-27 19:41:09,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-27 19:41:09,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:09,241 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:09,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 19:41:09,241 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:09,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:09,242 INFO L82 PathProgramCache]: Analyzing trace with hash 583769404, now seen corresponding path program 35 times [2020-10-27 19:41:09,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:09,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106151023] [2020-10-27 19:41:09,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:09,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:09,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:09,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-27 19:41:09,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:09,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 569 [2020-10-27 19:41:09,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:09,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 19:41:09,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:09,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 19:41:09,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:10,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:10,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:10,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:10,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:10,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:10,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:41:10,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:10,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:10,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:10,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:10,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:10,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:10,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106151023] [2020-10-27 19:41:10,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:10,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 19:41:10,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938660919] [2020-10-27 19:41:10,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 19:41:10,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:10,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 19:41:10,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 19:41:10,832 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 39 states. [2020-10-27 19:41:13,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:13,232 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-10-27 19:41:13,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 19:41:13,232 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-10-27 19:41:13,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:13,234 INFO L225 Difference]: With dead ends: 92 [2020-10-27 19:41:13,234 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 19:41:13,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-10-27 19:41:13,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 19:41:13,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-27 19:41:13,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-27 19:41:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-10-27 19:41:13,241 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-10-27 19:41:13,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:13,242 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-10-27 19:41:13,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 19:41:13,242 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-10-27 19:41:13,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-27 19:41:13,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:13,243 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:13,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 19:41:13,243 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:13,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:13,243 INFO L82 PathProgramCache]: Analyzing trace with hash -802226306, now seen corresponding path program 36 times [2020-10-27 19:41:13,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:13,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734304577] [2020-10-27 19:41:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:13,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:13,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:13,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-27 19:41:13,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:13,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 450 [2020-10-27 19:41:13,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:13,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 19:41:13,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:13,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 19:41:13,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:14,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:14,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:14,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:14,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:14,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:14,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:41:14,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:14,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:14,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:14,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:14,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:14,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734304577] [2020-10-27 19:41:14,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:14,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 19:41:14,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203088658] [2020-10-27 19:41:14,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 19:41:14,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:14,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 19:41:14,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 19:41:14,786 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 40 states. [2020-10-27 19:41:17,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:17,320 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-10-27 19:41:17,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 19:41:17,321 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-10-27 19:41:17,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:17,322 INFO L225 Difference]: With dead ends: 94 [2020-10-27 19:41:17,322 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 19:41:17,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-10-27 19:41:17,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 19:41:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-27 19:41:17,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 19:41:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-10-27 19:41:17,329 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-10-27 19:41:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:17,329 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-10-27 19:41:17,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 19:41:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-10-27 19:41:17,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-27 19:41:17,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:17,329 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:17,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 19:41:17,330 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:17,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:17,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1304241856, now seen corresponding path program 37 times [2020-10-27 19:41:17,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:17,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382464288] [2020-10-27 19:41:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:17,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:17,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:17,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 19:41:17,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:17,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-27 19:41:17,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:17,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 19:41:17,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:17,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 19:41:17,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:18,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:18,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:18,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:18,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:18,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:18,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:41:18,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:18,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:18,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:18,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:18,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:18,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382464288] [2020-10-27 19:41:18,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:18,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 19:41:18,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062270584] [2020-10-27 19:41:18,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 19:41:18,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:18,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 19:41:18,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 19:41:18,944 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 41 states. [2020-10-27 19:41:21,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:21,640 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-10-27 19:41:21,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 19:41:21,641 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-27 19:41:21,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:21,642 INFO L225 Difference]: With dead ends: 96 [2020-10-27 19:41:21,642 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 19:41:21,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-10-27 19:41:21,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 19:41:21,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-27 19:41:21,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 19:41:21,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-10-27 19:41:21,651 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-10-27 19:41:21,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:21,651 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-10-27 19:41:21,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 19:41:21,651 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-10-27 19:41:21,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 19:41:21,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:21,651 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:21,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 19:41:21,652 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:21,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:21,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1590119042, now seen corresponding path program 38 times [2020-10-27 19:41:21,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:21,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679861280] [2020-10-27 19:41:21,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:21,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:21,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:22,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:22,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 19:41:22,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:22,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 475 [2020-10-27 19:41:22,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:22,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 19:41:22,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:22,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 19:41:22,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:23,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:23,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:23,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:23,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:23,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:23,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:41:23,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:23,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:23,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:23,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679861280] [2020-10-27 19:41:23,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:23,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 19:41:23,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609271543] [2020-10-27 19:41:23,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 19:41:23,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:23,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 19:41:23,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 19:41:23,309 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 42 states. [2020-10-27 19:41:26,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:26,154 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2020-10-27 19:41:26,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 19:41:26,155 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-10-27 19:41:26,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:26,156 INFO L225 Difference]: With dead ends: 98 [2020-10-27 19:41:26,156 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 19:41:26,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-10-27 19:41:26,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 19:41:26,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-27 19:41:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 19:41:26,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-10-27 19:41:26,165 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-10-27 19:41:26,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:26,165 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-10-27 19:41:26,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 19:41:26,165 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-10-27 19:41:26,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-27 19:41:26,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:26,166 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:26,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 19:41:26,166 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:26,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:26,167 INFO L82 PathProgramCache]: Analyzing trace with hash -67865788, now seen corresponding path program 39 times [2020-10-27 19:41:26,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:26,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135941527] [2020-10-27 19:41:26,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:26,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:26,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:26,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 19:41:26,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:26,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-10-27 19:41:26,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:26,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 19:41:26,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:26,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 19:41:26,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:27,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:27,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:27,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:27,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:27,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:27,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:41:27,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:27,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:27,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:27,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:27,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:27,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135941527] [2020-10-27 19:41:27,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:27,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 19:41:27,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072097468] [2020-10-27 19:41:27,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 19:41:27,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:27,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 19:41:27,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 19:41:27,927 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 43 states. [2020-10-27 19:41:30,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:30,795 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-10-27 19:41:30,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 19:41:30,795 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-10-27 19:41:30,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:30,796 INFO L225 Difference]: With dead ends: 100 [2020-10-27 19:41:30,797 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 19:41:30,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-10-27 19:41:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 19:41:30,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-27 19:41:30,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 19:41:30,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-10-27 19:41:30,807 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-10-27 19:41:30,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:30,807 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-10-27 19:41:30,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 19:41:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-10-27 19:41:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 19:41:30,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:30,808 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:30,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 19:41:30,808 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:30,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:30,809 INFO L82 PathProgramCache]: Analyzing trace with hash 41579398, now seen corresponding path program 40 times [2020-10-27 19:41:30,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:30,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029545176] [2020-10-27 19:41:30,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:30,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:31,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:31,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-27 19:41:31,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:31,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-10-27 19:41:31,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:31,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 19:41:31,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:31,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 19:41:31,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:32,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:32,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:32,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:32,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:32,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:32,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:41:32,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:32,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:32,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:32,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:32,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:32,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029545176] [2020-10-27 19:41:32,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:32,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 19:41:32,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908069531] [2020-10-27 19:41:32,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 19:41:32,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:32,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 19:41:32,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 19:41:32,720 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 44 states. [2020-10-27 19:41:35,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:35,759 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-10-27 19:41:35,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 19:41:35,760 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 92 [2020-10-27 19:41:35,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:35,761 INFO L225 Difference]: With dead ends: 102 [2020-10-27 19:41:35,761 INFO L226 Difference]: Without dead ends: 96 [2020-10-27 19:41:35,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-10-27 19:41:35,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-27 19:41:35,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-27 19:41:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 19:41:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-10-27 19:41:35,769 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-10-27 19:41:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:35,769 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-10-27 19:41:35,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 19:41:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-10-27 19:41:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-27 19:41:35,770 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:35,770 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:35,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 19:41:35,770 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:35,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash 2139188040, now seen corresponding path program 41 times [2020-10-27 19:41:35,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:35,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275554860] [2020-10-27 19:41:35,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:35,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:35,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:36,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:36,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 19:41:36,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:36,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 566 [2020-10-27 19:41:36,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:36,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 19:41:36,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:36,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 19:41:36,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:37,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:37,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:37,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:37,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:37,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:37,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:41:37,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:37,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:37,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:37,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:37,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:37,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:37,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275554860] [2020-10-27 19:41:37,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:37,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 19:41:37,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085196367] [2020-10-27 19:41:37,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 19:41:37,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:37,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 19:41:37,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 19:41:37,713 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 45 states. [2020-10-27 19:41:40,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:40,878 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2020-10-27 19:41:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 19:41:40,879 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 94 [2020-10-27 19:41:40,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:40,880 INFO L225 Difference]: With dead ends: 104 [2020-10-27 19:41:40,880 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 19:41:40,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-10-27 19:41:40,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 19:41:40,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-27 19:41:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-27 19:41:40,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-10-27 19:41:40,889 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-10-27 19:41:40,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:40,889 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-10-27 19:41:40,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 19:41:40,889 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-10-27 19:41:40,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 19:41:40,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:40,890 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:40,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 19:41:40,890 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:40,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:40,891 INFO L82 PathProgramCache]: Analyzing trace with hash -693536118, now seen corresponding path program 42 times [2020-10-27 19:41:40,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:40,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [122571733] [2020-10-27 19:41:40,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:40,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:41,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:41,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 19:41:41,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:41,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-27 19:41:41,460 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:41,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 19:41:41,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:41,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 19:41:41,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:42,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:42,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:42,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:42,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:42,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:42,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:41:42,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:42,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:42,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:42,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:42,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:42,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [122571733] [2020-10-27 19:41:42,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:42,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 19:41:42,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073440157] [2020-10-27 19:41:42,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 19:41:42,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:42,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 19:41:42,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 19:41:42,886 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 46 states. [2020-10-27 19:41:46,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:46,133 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-10-27 19:41:46,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 19:41:46,134 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 96 [2020-10-27 19:41:46,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:46,135 INFO L225 Difference]: With dead ends: 106 [2020-10-27 19:41:46,135 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 19:41:46,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-10-27 19:41:46,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 19:41:46,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-27 19:41:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 19:41:46,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-10-27 19:41:46,143 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-10-27 19:41:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:46,144 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-10-27 19:41:46,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 19:41:46,144 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-10-27 19:41:46,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-27 19:41:46,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:46,145 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:46,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 19:41:46,145 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:46,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:46,145 INFO L82 PathProgramCache]: Analyzing trace with hash 67813708, now seen corresponding path program 43 times [2020-10-27 19:41:46,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:46,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777527871] [2020-10-27 19:41:46,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:46,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:46,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:46,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-27 19:41:46,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:46,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 536 [2020-10-27 19:41:46,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 19:41:46,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:46,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 19:41:46,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:48,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:48,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:48,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:48,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:48,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:48,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:41:48,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:48,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:48,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:48,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:48,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:48,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:48,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777527871] [2020-10-27 19:41:48,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:48,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 19:41:48,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922681152] [2020-10-27 19:41:48,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 19:41:48,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:48,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 19:41:48,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 19:41:48,189 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 47 states. [2020-10-27 19:41:51,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:51,548 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2020-10-27 19:41:51,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 19:41:51,549 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 98 [2020-10-27 19:41:51,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:51,550 INFO L225 Difference]: With dead ends: 108 [2020-10-27 19:41:51,550 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 19:41:51,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-10-27 19:41:51,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 19:41:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-27 19:41:51,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 19:41:51,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-10-27 19:41:51,559 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-10-27 19:41:51,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:51,559 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-10-27 19:41:51,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 19:41:51,559 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-10-27 19:41:51,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-27 19:41:51,560 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:51,560 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:51,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 19:41:51,560 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:51,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:51,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1580556174, now seen corresponding path program 44 times [2020-10-27 19:41:51,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:51,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544115174] [2020-10-27 19:41:51,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:51,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:52,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:52,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 19:41:52,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:52,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 585 [2020-10-27 19:41:52,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:52,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 19:41:52,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:52,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 19:41:52,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:53,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:53,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:53,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:53,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:53,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:53,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:41:53,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:53,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:53,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:53,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:53,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:53,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:53,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544115174] [2020-10-27 19:41:53,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:53,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 19:41:53,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537240211] [2020-10-27 19:41:53,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 19:41:53,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:53,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 19:41:53,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 19:41:53,691 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 48 states. [2020-10-27 19:41:57,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:41:57,236 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-10-27 19:41:57,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 19:41:57,237 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 100 [2020-10-27 19:41:57,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:41:57,238 INFO L225 Difference]: With dead ends: 110 [2020-10-27 19:41:57,238 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 19:41:57,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-10-27 19:41:57,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 19:41:57,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-27 19:41:57,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 19:41:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-10-27 19:41:57,249 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-10-27 19:41:57,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:41:57,249 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-10-27 19:41:57,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 19:41:57,249 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-10-27 19:41:57,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-27 19:41:57,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:41:57,250 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:41:57,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 19:41:57,250 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:41:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:41:57,251 INFO L82 PathProgramCache]: Analyzing trace with hash -667847344, now seen corresponding path program 45 times [2020-10-27 19:41:57,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:41:57,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279564680] [2020-10-27 19:41:57,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:41:57,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:57,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:57,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:57,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-27 19:41:57,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:57,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 564 [2020-10-27 19:41:57,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:57,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 19:41:57,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:41:57,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-27 19:41:57,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:59,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:41:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:41:59,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:41:59,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:41:59,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:41:59,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:41:59,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:41:59,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:41:59,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:41:59,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:41:59,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:41:59,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:41:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:41:59,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279564680] [2020-10-27 19:41:59,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:41:59,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 19:41:59,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336242284] [2020-10-27 19:41:59,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 19:41:59,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:41:59,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 19:41:59,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 19:41:59,450 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 49 states. [2020-10-27 19:42:03,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:03,124 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2020-10-27 19:42:03,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 19:42:03,125 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 102 [2020-10-27 19:42:03,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:03,126 INFO L225 Difference]: With dead ends: 112 [2020-10-27 19:42:03,126 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 19:42:03,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-10-27 19:42:03,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 19:42:03,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-27 19:42:03,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-27 19:42:03,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-10-27 19:42:03,136 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-10-27 19:42:03,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:03,136 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-10-27 19:42:03,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 19:42:03,136 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-10-27 19:42:03,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 19:42:03,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:03,137 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:03,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 19:42:03,137 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:03,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:03,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1015078254, now seen corresponding path program 46 times [2020-10-27 19:42:03,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:03,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564008714] [2020-10-27 19:42:03,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:03,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:03,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:03,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 19:42:03,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:03,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 612 [2020-10-27 19:42:03,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:03,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 19:42:03,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:03,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 19:42:03,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:05,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:05,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:05,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:05,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:05,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:05,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:42:05,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:05,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:05,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:05,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:05,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:05,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:05,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564008714] [2020-10-27 19:42:05,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:05,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 19:42:05,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355556848] [2020-10-27 19:42:05,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 19:42:05,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:05,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 19:42:05,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 19:42:05,488 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 50 states. [2020-10-27 19:42:09,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:09,228 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2020-10-27 19:42:09,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 19:42:09,229 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 104 [2020-10-27 19:42:09,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:09,231 INFO L225 Difference]: With dead ends: 114 [2020-10-27 19:42:09,231 INFO L226 Difference]: Without dead ends: 108 [2020-10-27 19:42:09,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-10-27 19:42:09,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-27 19:42:09,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-27 19:42:09,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 19:42:09,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-10-27 19:42:09,240 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-10-27 19:42:09,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:09,240 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-10-27 19:42:09,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 19:42:09,240 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-10-27 19:42:09,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-27 19:42:09,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:09,241 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:09,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 19:42:09,241 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:09,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:09,241 INFO L82 PathProgramCache]: Analyzing trace with hash 303466324, now seen corresponding path program 47 times [2020-10-27 19:42:09,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:09,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114052193] [2020-10-27 19:42:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:09,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:09,898 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:09,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 19:42:09,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:09,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 643 [2020-10-27 19:42:09,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:09,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 19:42:09,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:09,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 19:42:09,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:11,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:11,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:11,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:11,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:11,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:11,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:42:11,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:11,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:11,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:11,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:11,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:11,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114052193] [2020-10-27 19:42:11,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:11,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 19:42:11,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032937891] [2020-10-27 19:42:11,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 19:42:11,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:11,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 19:42:11,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 19:42:11,668 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 51 states. [2020-10-27 19:42:15,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:15,626 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-10-27 19:42:15,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 19:42:15,627 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 106 [2020-10-27 19:42:15,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:15,628 INFO L225 Difference]: With dead ends: 116 [2020-10-27 19:42:15,628 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 19:42:15,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-10-27 19:42:15,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 19:42:15,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-27 19:42:15,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 19:42:15,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-10-27 19:42:15,637 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-10-27 19:42:15,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:15,638 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-10-27 19:42:15,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 19:42:15,638 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-10-27 19:42:15,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 19:42:15,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:15,639 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:15,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 19:42:15,639 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:15,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:15,639 INFO L82 PathProgramCache]: Analyzing trace with hash 409453462, now seen corresponding path program 48 times [2020-10-27 19:42:15,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:15,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074319507] [2020-10-27 19:42:15,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:15,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:16,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:16,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-27 19:42:16,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:16,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 632 [2020-10-27 19:42:16,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:16,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 19:42:16,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:16,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 19:42:16,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:18,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:18,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:18,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:18,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:18,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:18,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:42:18,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:18,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:18,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:18,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074319507] [2020-10-27 19:42:18,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:18,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 19:42:18,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507611351] [2020-10-27 19:42:18,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 19:42:18,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:18,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 19:42:18,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 19:42:18,132 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 52 states. [2020-10-27 19:42:22,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:22,288 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-10-27 19:42:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 19:42:22,289 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 108 [2020-10-27 19:42:22,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:22,290 INFO L225 Difference]: With dead ends: 118 [2020-10-27 19:42:22,290 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 19:42:22,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-10-27 19:42:22,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 19:42:22,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-27 19:42:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 19:42:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-10-27 19:42:22,298 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-10-27 19:42:22,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:22,299 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-10-27 19:42:22,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 19:42:22,299 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-10-27 19:42:22,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-27 19:42:22,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:22,299 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:22,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 19:42:22,300 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:22,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:22,300 INFO L82 PathProgramCache]: Analyzing trace with hash -816122024, now seen corresponding path program 49 times [2020-10-27 19:42:22,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:22,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819177453] [2020-10-27 19:42:22,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:22,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:22,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:22,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-27 19:42:22,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:22,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 679 [2020-10-27 19:42:22,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:22,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 19:42:22,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:22,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 19:42:22,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:24,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:24,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:24,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:24,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:24,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:24,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:42:24,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:24,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:24,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:24,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:24,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:24,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819177453] [2020-10-27 19:42:24,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:24,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 19:42:24,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897082008] [2020-10-27 19:42:24,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 19:42:24,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:24,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 19:42:24,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 19:42:24,911 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 53 states. [2020-10-27 19:42:29,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:29,164 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2020-10-27 19:42:29,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 19:42:29,165 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 110 [2020-10-27 19:42:29,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:29,166 INFO L225 Difference]: With dead ends: 120 [2020-10-27 19:42:29,167 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 19:42:29,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-10-27 19:42:29,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 19:42:29,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-27 19:42:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-27 19:42:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-10-27 19:42:29,175 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-10-27 19:42:29,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:29,175 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-10-27 19:42:29,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 19:42:29,175 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-10-27 19:42:29,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 19:42:29,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:29,176 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:29,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 19:42:29,176 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:29,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:29,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1773124966, now seen corresponding path program 50 times [2020-10-27 19:42:29,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:29,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009798874] [2020-10-27 19:42:29,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:29,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:29,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:29,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 19:42:29,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:29,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 806 [2020-10-27 19:42:29,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:29,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 19:42:29,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:30,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 19:42:30,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:32,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:32,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:32,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:32,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:32,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:32,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:42:32,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:32,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:32,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:32,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:32,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:32,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009798874] [2020-10-27 19:42:32,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:32,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 19:42:32,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983319475] [2020-10-27 19:42:32,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 19:42:32,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:32,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 19:42:32,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 19:42:32,033 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 54 states. [2020-10-27 19:42:36,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:36,423 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2020-10-27 19:42:36,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 19:42:36,424 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 112 [2020-10-27 19:42:36,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:36,425 INFO L225 Difference]: With dead ends: 122 [2020-10-27 19:42:36,425 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 19:42:36,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-10-27 19:42:36,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 19:42:36,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-27 19:42:36,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 19:42:36,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-10-27 19:42:36,434 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2020-10-27 19:42:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:36,435 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-10-27 19:42:36,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 19:42:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-10-27 19:42:36,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-27 19:42:36,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:36,436 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:36,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 19:42:36,436 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:36,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:36,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1965016412, now seen corresponding path program 51 times [2020-10-27 19:42:36,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:36,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592355763] [2020-10-27 19:42:36,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:36,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:36,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:37,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:37,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-27 19:42:37,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:37,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 964 [2020-10-27 19:42:37,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:37,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 19:42:37,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:37,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-27 19:42:37,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:39,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:39,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:39,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:39,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:39,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:39,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:42:39,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:39,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:39,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:39,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:39,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:39,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592355763] [2020-10-27 19:42:39,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:39,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 19:42:39,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654869178] [2020-10-27 19:42:39,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 19:42:39,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:39,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 19:42:39,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 19:42:39,540 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 55 states. [2020-10-27 19:42:44,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:44,070 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2020-10-27 19:42:44,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 19:42:44,070 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 114 [2020-10-27 19:42:44,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:44,072 INFO L225 Difference]: With dead ends: 124 [2020-10-27 19:42:44,072 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 19:42:44,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-10-27 19:42:44,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 19:42:44,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-27 19:42:44,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 19:42:44,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-10-27 19:42:44,081 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2020-10-27 19:42:44,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:44,081 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-10-27 19:42:44,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 19:42:44,081 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-10-27 19:42:44,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 19:42:44,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:44,082 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:44,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 19:42:44,082 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:44,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:44,083 INFO L82 PathProgramCache]: Analyzing trace with hash -568746082, now seen corresponding path program 52 times [2020-10-27 19:42:44,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:44,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381457586] [2020-10-27 19:42:44,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:44,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:44,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:44,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-27 19:42:44,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:44,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 775 [2020-10-27 19:42:44,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:44,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 19:42:44,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:44,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 19:42:44,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:47,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:47,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:47,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:47,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:47,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:47,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:42:47,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:47,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:47,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:47,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:47,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:47,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:47,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381457586] [2020-10-27 19:42:47,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:47,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 19:42:47,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613269940] [2020-10-27 19:42:47,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 19:42:47,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:47,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 19:42:47,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 19:42:47,062 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 56 states. [2020-10-27 19:42:51,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:51,790 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-10-27 19:42:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 19:42:51,793 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 116 [2020-10-27 19:42:51,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:51,794 INFO L225 Difference]: With dead ends: 126 [2020-10-27 19:42:51,794 INFO L226 Difference]: Without dead ends: 120 [2020-10-27 19:42:51,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2020-10-27 19:42:51,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-27 19:42:51,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-27 19:42:51,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 19:42:51,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2020-10-27 19:42:51,804 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2020-10-27 19:42:51,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:51,804 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2020-10-27 19:42:51,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 19:42:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2020-10-27 19:42:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-27 19:42:51,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:51,805 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:51,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 19:42:51,805 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:51,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:51,806 INFO L82 PathProgramCache]: Analyzing trace with hash -268045984, now seen corresponding path program 53 times [2020-10-27 19:42:51,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:51,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258382695] [2020-10-27 19:42:51,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:51,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:52,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:52,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-27 19:42:52,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:52,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 833 [2020-10-27 19:42:52,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:52,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 19:42:52,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:42:52,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 19:42:52,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:54,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:42:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:54,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:42:54,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:42:54,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:42:54,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:42:54,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:42:54,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:42:54,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:42:54,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:42:54,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:42:54,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:42:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:42:54,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258382695] [2020-10-27 19:42:54,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:42:54,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-27 19:42:54,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704668537] [2020-10-27 19:42:54,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-27 19:42:54,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:42:54,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-27 19:42:54,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 19:42:54,931 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 57 states. [2020-10-27 19:42:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:42:59,691 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2020-10-27 19:42:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 19:42:59,692 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 118 [2020-10-27 19:42:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:42:59,694 INFO L225 Difference]: With dead ends: 128 [2020-10-27 19:42:59,694 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 19:42:59,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2020-10-27 19:42:59,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 19:42:59,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-27 19:42:59,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 19:42:59,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-10-27 19:42:59,703 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2020-10-27 19:42:59,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:42:59,704 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-10-27 19:42:59,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-27 19:42:59,704 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-10-27 19:42:59,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 19:42:59,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:42:59,705 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:42:59,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 19:42:59,705 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:42:59,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:42:59,705 INFO L82 PathProgramCache]: Analyzing trace with hash 941939362, now seen corresponding path program 54 times [2020-10-27 19:42:59,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:42:59,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37336055] [2020-10-27 19:42:59,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:42:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:42:59,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:00,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:00,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 19:43:00,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:00,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 851 [2020-10-27 19:43:00,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:00,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 19:43:00,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:00,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 19:43:00,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:02,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:02,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:02,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:02,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:02,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:02,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:43:02,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:02,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:02,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:02,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:02,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:02,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37336055] [2020-10-27 19:43:02,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:02,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 19:43:02,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742374195] [2020-10-27 19:43:02,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 19:43:02,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:02,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 19:43:02,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 19:43:02,944 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 58 states. [2020-10-27 19:43:07,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:07,962 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2020-10-27 19:43:07,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 19:43:07,963 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 120 [2020-10-27 19:43:07,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:07,964 INFO L225 Difference]: With dead ends: 130 [2020-10-27 19:43:07,964 INFO L226 Difference]: Without dead ends: 124 [2020-10-27 19:43:07,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2020-10-27 19:43:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-27 19:43:07,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-27 19:43:07,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 19:43:07,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-10-27 19:43:07,972 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2020-10-27 19:43:07,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:07,972 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-10-27 19:43:07,972 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-27 19:43:07,972 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-10-27 19:43:07,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-27 19:43:07,973 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:07,973 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:07,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 19:43:07,973 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:07,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:07,974 INFO L82 PathProgramCache]: Analyzing trace with hash -198280348, now seen corresponding path program 55 times [2020-10-27 19:43:07,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:07,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1942332188] [2020-10-27 19:43:07,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:07,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:08,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:08,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:08,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-27 19:43:08,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:08,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 866 [2020-10-27 19:43:08,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:08,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-27 19:43:08,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:08,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 19:43:08,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:11,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:11,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:11,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:11,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:11,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:11,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:43:11,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:11,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:11,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:11,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:11,322 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:11,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1942332188] [2020-10-27 19:43:11,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:11,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-27 19:43:11,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760756127] [2020-10-27 19:43:11,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-27 19:43:11,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:11,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-27 19:43:11,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 19:43:11,340 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 59 states. [2020-10-27 19:43:16,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:16,536 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2020-10-27 19:43:16,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 19:43:16,537 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 122 [2020-10-27 19:43:16,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:16,538 INFO L225 Difference]: With dead ends: 132 [2020-10-27 19:43:16,538 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 19:43:16,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2020-10-27 19:43:16,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 19:43:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-27 19:43:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-27 19:43:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-10-27 19:43:16,545 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2020-10-27 19:43:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:16,546 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-10-27 19:43:16,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-27 19:43:16,546 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-10-27 19:43:16,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-27 19:43:16,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:16,547 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:16,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 19:43:16,547 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:16,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:16,547 INFO L82 PathProgramCache]: Analyzing trace with hash -732761178, now seen corresponding path program 56 times [2020-10-27 19:43:16,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:16,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080965608] [2020-10-27 19:43:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:16,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:17,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:17,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-27 19:43:17,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:17,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 864 [2020-10-27 19:43:17,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:17,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-27 19:43:17,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:17,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 19:43:17,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:19,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:19,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:19,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:19,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:19,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:19,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:43:19,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:19,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:19,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:19,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:19,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:19,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080965608] [2020-10-27 19:43:19,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:19,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-27 19:43:19,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174759805] [2020-10-27 19:43:19,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-27 19:43:19,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:19,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-27 19:43:19,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 19:43:19,968 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 60 states. [2020-10-27 19:43:25,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:25,265 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-10-27 19:43:25,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-27 19:43:25,266 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 124 [2020-10-27 19:43:25,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:25,267 INFO L225 Difference]: With dead ends: 134 [2020-10-27 19:43:25,267 INFO L226 Difference]: Without dead ends: 128 [2020-10-27 19:43:25,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2020-10-27 19:43:25,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-27 19:43:25,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-27 19:43:25,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 19:43:25,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-10-27 19:43:25,277 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2020-10-27 19:43:25,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:25,277 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-10-27 19:43:25,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-27 19:43:25,277 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-10-27 19:43:25,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-27 19:43:25,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:25,278 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:25,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 19:43:25,278 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:25,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:25,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1027236712, now seen corresponding path program 57 times [2020-10-27 19:43:25,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:25,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694079892] [2020-10-27 19:43:25,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:25,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:25,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:26,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:26,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-27 19:43:26,246 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:26,246 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 948 [2020-10-27 19:43:26,246 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-27 19:43:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:26,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-27 19:43:26,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:28,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:28,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:28,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:28,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:28,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:28,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:43:28,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:28,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:28,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:28,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:28,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:28,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694079892] [2020-10-27 19:43:28,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:28,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-27 19:43:28,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015533530] [2020-10-27 19:43:28,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-27 19:43:28,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:28,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-27 19:43:28,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 19:43:28,885 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 61 states. [2020-10-27 19:43:34,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:34,422 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-10-27 19:43:34,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-27 19:43:34,422 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 126 [2020-10-27 19:43:34,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:34,423 INFO L225 Difference]: With dead ends: 136 [2020-10-27 19:43:34,423 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 19:43:34,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2020-10-27 19:43:34,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 19:43:34,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-27 19:43:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-27 19:43:34,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2020-10-27 19:43:34,433 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2020-10-27 19:43:34,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:34,434 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2020-10-27 19:43:34,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-27 19:43:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2020-10-27 19:43:34,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-27 19:43:34,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:34,435 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:34,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 19:43:34,435 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:34,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:34,435 INFO L82 PathProgramCache]: Analyzing trace with hash 168094378, now seen corresponding path program 58 times [2020-10-27 19:43:34,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:34,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492326301] [2020-10-27 19:43:34,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:34,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:34,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:35,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:35,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 19:43:35,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:35,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 971 [2020-10-27 19:43:35,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:35,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-27 19:43:35,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:35,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-27 19:43:35,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:38,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:38,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:38,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:38,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:38,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:38,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:43:38,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:38,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:38,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:38,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:38,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:38,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:38,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492326301] [2020-10-27 19:43:38,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:38,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-27 19:43:38,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125861424] [2020-10-27 19:43:38,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-27 19:43:38,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:38,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-27 19:43:38,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 19:43:38,166 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 62 states. [2020-10-27 19:43:43,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:43,790 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2020-10-27 19:43:43,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-27 19:43:43,791 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 128 [2020-10-27 19:43:43,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:43,792 INFO L225 Difference]: With dead ends: 138 [2020-10-27 19:43:43,792 INFO L226 Difference]: Without dead ends: 132 [2020-10-27 19:43:43,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2020-10-27 19:43:43,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-27 19:43:43,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-27 19:43:43,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 19:43:43,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-10-27 19:43:43,800 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2020-10-27 19:43:43,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:43,800 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-10-27 19:43:43,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-27 19:43:43,800 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-10-27 19:43:43,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-27 19:43:43,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:43,801 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:43,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 19:43:43,801 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:43,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:43,801 INFO L82 PathProgramCache]: Analyzing trace with hash -833967764, now seen corresponding path program 59 times [2020-10-27 19:43:43,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:43,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458124187] [2020-10-27 19:43:43,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:43,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:43,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:44,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:44,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-27 19:43:44,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:44,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-10-27 19:43:44,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:44,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-27 19:43:44,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:44,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-27 19:43:44,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:47,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:47,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:47,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:47,622 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:47,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:47,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:47,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:43:47,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:47,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:47,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:47,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:47,623 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:47,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458124187] [2020-10-27 19:43:47,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:47,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-27 19:43:47,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072048471] [2020-10-27 19:43:47,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-27 19:43:47,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:47,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-27 19:43:47,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 19:43:47,639 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 63 states. [2020-10-27 19:43:53,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:43:53,530 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2020-10-27 19:43:53,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-27 19:43:53,531 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 130 [2020-10-27 19:43:53,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:43:53,532 INFO L225 Difference]: With dead ends: 140 [2020-10-27 19:43:53,532 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 19:43:53,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2020-10-27 19:43:53,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 19:43:53,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-27 19:43:53,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-27 19:43:53,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2020-10-27 19:43:53,545 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2020-10-27 19:43:53,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:43:53,545 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2020-10-27 19:43:53,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-27 19:43:53,545 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2020-10-27 19:43:53,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-27 19:43:53,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:43:53,546 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:43:53,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 19:43:53,546 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:43:53,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:43:53,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1743011922, now seen corresponding path program 60 times [2020-10-27 19:43:53,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:43:53,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904509058] [2020-10-27 19:43:53,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:43:53,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:53,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:54,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:54,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-27 19:43:54,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:54,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1127 [2020-10-27 19:43:54,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:54,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-27 19:43:54,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:43:54,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-27 19:43:54,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:57,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:43:57,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:43:57,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:43:57,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:43:57,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:43:57,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:43:57,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:43:57,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:43:57,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:43:57,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:43:57,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:43:57,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:43:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:43:57,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904509058] [2020-10-27 19:43:57,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:43:57,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-27 19:43:57,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066011002] [2020-10-27 19:43:57,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-27 19:43:57,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:43:57,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-27 19:43:57,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 19:43:57,657 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 64 states.