/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:18:53,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:18:53,531 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:18:53,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:18:53,590 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:18:53,597 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:18:53,599 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:18:53,604 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:18:53,608 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:18:53,614 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:18:53,615 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:18:53,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:18:53,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:18:53,622 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:18:53,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:18:53,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:18:53,640 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:18:53,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:18:53,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:18:53,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:18:53,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:18:53,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:18:53,671 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:18:53,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:18:53,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:18:53,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:18:53,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:18:53,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:18:53,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:18:53,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 00:18:53,694 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:18:53,696 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:18:53,696 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:18:53,705 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 00:18:53,759 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:18:53,760 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:18:53,766 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:18:53,766 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:18:53,766 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:18:53,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:18:53,767 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:18:53,768 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:18:53,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:18:53,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:18:53,769 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:18:53,770 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:18:53,770 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:18:53,770 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:18:53,770 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:18:53,770 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:18:53,770 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:18:53,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:18:53,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:18:53,771 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:18:53,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:18:53,771 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:18:53,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:18:53,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:18:53,773 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:18:53,773 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:18:53,773 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:18:53,773 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:18:53,773 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:18:53,773 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:18:54,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:18:54,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:18:54,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:18:54,290 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:18:54,291 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:18:54,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label53.c [2020-10-27 00:18:54,364 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/428ddfc9e/c7f4e2185af7436eb7f4838d640e90c6/FLAG80da37918 [2020-10-27 00:18:55,311 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:18:55,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label53.c [2020-10-27 00:18:55,343 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/428ddfc9e/c7f4e2185af7436eb7f4838d640e90c6/FLAG80da37918 [2020-10-27 00:18:55,844 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/428ddfc9e/c7f4e2185af7436eb7f4838d640e90c6 [2020-10-27 00:18:55,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:18:55,856 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:18:55,858 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:18:55,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:18:55,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:18:55,864 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:18:55" (1/1) ... [2020-10-27 00:18:55,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6290cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:55, skipping insertion in model container [2020-10-27 00:18:55,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:18:55" (1/1) ... [2020-10-27 00:18:55,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:18:55,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:18:57,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:18:57,155 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:18:57,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:18:57,678 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:18:57,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:57 WrapperNode [2020-10-27 00:18:57,680 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:18:57,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:18:57,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:18:57,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:18:57,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:57" (1/1) ... [2020-10-27 00:18:57,703 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:57" (1/1) ... [2020-10-27 00:18:57,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:57" (1/1) ... [2020-10-27 00:18:57,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:57" (1/1) ... [2020-10-27 00:18:57,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:57" (1/1) ... [2020-10-27 00:18:57,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:57" (1/1) ... [2020-10-27 00:18:57,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:57" (1/1) ... [2020-10-27 00:18:57,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:18:57,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:18:57,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:18:57,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:18:57,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:57" (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 00:18:58,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:18:58,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:18:58,077 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:18:58,078 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:18:58,078 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:18:58,078 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:18:58,078 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:18:58,079 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:18:58,079 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:18:58,079 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:18:58,080 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:18:58,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:18:58,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:18:58,080 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:18:58,081 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:18:58,081 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:18:58,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:18:58,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:18:58,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:18:58,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:18:58,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:19:07,491 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:19:07,491 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:19:07,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:19:07 BoogieIcfgContainer [2020-10-27 00:19:07,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:19:07,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:19:07,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:19:07,507 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:19:07,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:18:55" (1/3) ... [2020-10-27 00:19:07,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c15571b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:19:07, skipping insertion in model container [2020-10-27 00:19:07,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:18:57" (2/3) ... [2020-10-27 00:19:07,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c15571b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:19:07, skipping insertion in model container [2020-10-27 00:19:07,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:19:07" (3/3) ... [2020-10-27 00:19:07,512 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label53.c [2020-10-27 00:19:07,530 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:19:07,537 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:19:07,553 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:19:07,604 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:19:07,604 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:19:07,604 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:19:07,604 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:19:07,604 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:19:07,604 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:19:07,605 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:19:07,605 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:19:07,655 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:19:07,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 00:19:07,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:07,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:07,665 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:07,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:07,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1185737181, now seen corresponding path program 1 times [2020-10-27 00:19:07,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:07,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307526262] [2020-10-27 00:19:07,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:07,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:07,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:08,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:08,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 00:19:08,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:08,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 508 [2020-10-27 00:19:08,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:08,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:19:08,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:19:08,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 00:19:08,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 00:19:08,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:08,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:08,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:08,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:08,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:08,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 00:19:08,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:08,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:08,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:08,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:19:08,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:19:08,688 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 00:19:08,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307526262] [2020-10-27 00:19:08,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:19:08,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:19:08,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317499168] [2020-10-27 00:19:08,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:19:08,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:08,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:19:08,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:19:08,730 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:19:23,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:23,713 INFO L93 Difference]: Finished difference Result 1694 states and 3092 transitions. [2020-10-27 00:19:23,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:19:23,715 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 00:19:23,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:23,754 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 00:19:23,755 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 00:19:23,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:19:23,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 00:19:23,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 992. [2020-10-27 00:19:23,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 992 states. [2020-10-27 00:19:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1527 transitions. [2020-10-27 00:19:23,924 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1527 transitions. Word has length 21 [2020-10-27 00:19:23,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:23,925 INFO L481 AbstractCegarLoop]: Abstraction has 992 states and 1527 transitions. [2020-10-27 00:19:23,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:19:23,926 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1527 transitions. [2020-10-27 00:19:23,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-27 00:19:23,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:23,931 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:23,931 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:19:23,932 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:23,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:23,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1698623038, now seen corresponding path program 1 times [2020-10-27 00:19:23,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:23,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469789176] [2020-10-27 00:19:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:24,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:24,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:25,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:25,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-27 00:19:25,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:19:25,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1355 [2020-10-27 00:19:25,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:25,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:19:25,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:19:25,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 00:19:25,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:19:25,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:25,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:25,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:25,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:25,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:25,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:19:25,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:25,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:25,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:25,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:19:25,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:25,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:25,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:25,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:25,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:19:25,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:25,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-27 00:19:25,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:25,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:25,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:25,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:19:25,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:25,798 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:19:25,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469789176] [2020-10-27 00:19:25,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:19:25,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:19:25,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956795202] [2020-10-27 00:19:25,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:19:25,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:25,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:19:25,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:19:25,803 INFO L87 Difference]: Start difference. First operand 992 states and 1527 transitions. Second operand 7 states. [2020-10-27 00:19:40,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:40,852 INFO L93 Difference]: Finished difference Result 2466 states and 3913 transitions. [2020-10-27 00:19:40,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:19:40,854 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2020-10-27 00:19:40,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:40,864 INFO L225 Difference]: With dead ends: 2466 [2020-10-27 00:19:40,864 INFO L226 Difference]: Without dead ends: 1480 [2020-10-27 00:19:40,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:19:40,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2020-10-27 00:19:40,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1442. [2020-10-27 00:19:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2020-10-27 00:19:40,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 1871 transitions. [2020-10-27 00:19:40,933 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 1871 transitions. Word has length 92 [2020-10-27 00:19:40,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:40,933 INFO L481 AbstractCegarLoop]: Abstraction has 1442 states and 1871 transitions. [2020-10-27 00:19:40,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:19:40,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 1871 transitions. [2020-10-27 00:19:40,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-27 00:19:40,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:40,937 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:40,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:19:40,938 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:40,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:40,938 INFO L82 PathProgramCache]: Analyzing trace with hash 562135223, now seen corresponding path program 1 times [2020-10-27 00:19:40,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:40,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785687753] [2020-10-27 00:19:40,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:41,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:41,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:41,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-27 00:19:41,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:41,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 325 [2020-10-27 00:19:41,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:41,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:41,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 84 [2020-10-27 00:19:41,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 00:19:41,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:41,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:41,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:41,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:41,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:41,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:41,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 00:19:41,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:41,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:19:41,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:41,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:19:41,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:41,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:41,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:41,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:41,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:41,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:19:41,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:41,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-27 00:19:41,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:41,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:41,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:41,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 00:19:41,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:19:41,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785687753] [2020-10-27 00:19:41,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:19:41,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:19:41,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154415495] [2020-10-27 00:19:41,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:19:41,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:41,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:19:41,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:19:41,730 INFO L87 Difference]: Start difference. First operand 1442 states and 1871 transitions. Second operand 5 states. [2020-10-27 00:19:58,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:58,000 INFO L93 Difference]: Finished difference Result 3350 states and 4601 transitions. [2020-10-27 00:19:58,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:19:58,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2020-10-27 00:19:58,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:58,014 INFO L225 Difference]: With dead ends: 3350 [2020-10-27 00:19:58,014 INFO L226 Difference]: Without dead ends: 1901 [2020-10-27 00:19:58,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:19:58,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2020-10-27 00:19:58,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 1886. [2020-10-27 00:19:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2020-10-27 00:19:58,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 2310 transitions. [2020-10-27 00:19:58,077 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 2310 transitions. Word has length 95 [2020-10-27 00:19:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:58,078 INFO L481 AbstractCegarLoop]: Abstraction has 1886 states and 2310 transitions. [2020-10-27 00:19:58,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:19:58,078 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 2310 transitions. [2020-10-27 00:19:58,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 00:19:58,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:58,083 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:58,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:19:58,084 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:58,085 INFO L82 PathProgramCache]: Analyzing trace with hash 655827335, now seen corresponding path program 1 times [2020-10-27 00:19:58,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:58,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [904111354] [2020-10-27 00:19:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:58,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:58,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:59,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:59,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-27 00:19:59,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:19:59,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1494 [2020-10-27 00:19:59,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:59,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:59,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:19:59,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:19:59,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 00:19:59,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:59,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:59,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:59,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:59,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:59,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 00:19:59,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:59,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:19:59,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:59,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:19:59,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:59,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:59,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:59,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:00,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:00,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:20:00,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:00,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 00:20:00,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:00,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:00,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:00,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:20:00,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:00,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:20:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:00,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:00,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:00,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 00:20:00,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:00,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-27 00:20:00,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:00,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:00,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:00,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 00:20:00,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:00,463 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:20:00,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [904111354] [2020-10-27 00:20:00,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:20:00,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:20:00,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150025381] [2020-10-27 00:20:00,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:20:00,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:00,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:20:00,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:20:00,474 INFO L87 Difference]: Start difference. First operand 1886 states and 2310 transitions. Second operand 7 states. [2020-10-27 00:20:14,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:20:14,138 INFO L93 Difference]: Finished difference Result 4252 states and 5515 transitions. [2020-10-27 00:20:14,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:20:14,140 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 181 [2020-10-27 00:20:14,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:20:14,159 INFO L225 Difference]: With dead ends: 4252 [2020-10-27 00:20:14,159 INFO L226 Difference]: Without dead ends: 2805 [2020-10-27 00:20:14,164 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:20:14,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2805 states. [2020-10-27 00:20:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2805 to 2791. [2020-10-27 00:20:14,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2791 states. [2020-10-27 00:20:14,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 3421 transitions. [2020-10-27 00:20:14,260 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 3421 transitions. Word has length 181 [2020-10-27 00:20:14,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:20:14,261 INFO L481 AbstractCegarLoop]: Abstraction has 2791 states and 3421 transitions. [2020-10-27 00:20:14,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:20:14,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 3421 transitions. [2020-10-27 00:20:14,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-27 00:20:14,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:20:14,266 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:20:14,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:20:14,266 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:20:14,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:20:14,267 INFO L82 PathProgramCache]: Analyzing trace with hash -424919445, now seen corresponding path program 1 times [2020-10-27 00:20:14,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:20:14,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1304955919] [2020-10-27 00:20:14,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:20:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:14,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:15,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:17,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:17,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-27 00:20:17,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:20:17,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2860 [2020-10-27 00:20:17,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:17,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 00:20:17,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:20:17,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 188 [2020-10-27 00:20:17,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:20:17,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:20:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:17,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:17,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:17,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:20:17,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:17,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:20:17,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:17,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:17,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:17,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:20:17,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:17,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:20:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:17,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:17,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:17,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:20:17,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:17,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-27 00:20:17,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:17,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:20:17,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:17,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:20:17,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:17,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:20:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:17,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:17,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:18,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:18,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:20:18,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:20:18,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 319 [2020-10-27 00:20:18,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:18,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:18,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:18,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:20:18,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:18,320 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2020-10-27 00:20:18,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1304955919] [2020-10-27 00:20:18,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:20:18,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:20:18,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641616945] [2020-10-27 00:20:18,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:20:18,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:18,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:20:18,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:20:18,326 INFO L87 Difference]: Start difference. First operand 2791 states and 3421 transitions. Second operand 8 states. [2020-10-27 00:20:19,168 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:20:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:20:40,795 INFO L93 Difference]: Finished difference Result 7469 states and 9516 transitions. [2020-10-27 00:20:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:20:40,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 183 [2020-10-27 00:20:40,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:20:40,832 INFO L225 Difference]: With dead ends: 7469 [2020-10-27 00:20:40,833 INFO L226 Difference]: Without dead ends: 4668 [2020-10-27 00:20:40,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:20:40,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4668 states. [2020-10-27 00:20:40,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4668 to 4629. [2020-10-27 00:20:40,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4629 states. [2020-10-27 00:20:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 5470 transitions. [2020-10-27 00:20:41,015 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 5470 transitions. Word has length 183 [2020-10-27 00:20:41,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:20:41,016 INFO L481 AbstractCegarLoop]: Abstraction has 4629 states and 5470 transitions. [2020-10-27 00:20:41,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:20:41,017 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 5470 transitions. [2020-10-27 00:20:41,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-27 00:20:41,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:20:41,020 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:20:41,020 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:20:41,020 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:20:41,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:20:41,021 INFO L82 PathProgramCache]: Analyzing trace with hash -35785291, now seen corresponding path program 1 times [2020-10-27 00:20:41,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:20:41,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365882631] [2020-10-27 00:20:41,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:20:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:41,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:41,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:42,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:42,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 208 [2020-10-27 00:20:42,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:20:42,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1344 [2020-10-27 00:20:42,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:42,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:20:42,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:20:42,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-27 00:20:42,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:42,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:20:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:42,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:42,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:42,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:20:42,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:42,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 00:20:42,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:42,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:20:42,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:42,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:20:42,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:42,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:20:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:42,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:42,792 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:42,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:20:42,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:42,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-27 00:20:42,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:42,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:20:42,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:20:42,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:20:42,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:42,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:20:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:42,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:43,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:43,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:43,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:20:43,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:20:43,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-27 00:20:43,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:20:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:20:43,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:20:43,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 103 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:20:43,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365882631] [2020-10-27 00:20:43,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:20:43,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:20:43,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143072344] [2020-10-27 00:20:43,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:20:43,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:43,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:20:43,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:20:43,441 INFO L87 Difference]: Start difference. First operand 4629 states and 5470 transitions. Second operand 6 states. [2020-10-27 00:20:56,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:20:56,722 INFO L93 Difference]: Finished difference Result 9266 states and 11276 transitions. [2020-10-27 00:20:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 00:20:56,724 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 194 [2020-10-27 00:20:56,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:20:56,752 INFO L225 Difference]: With dead ends: 9266 [2020-10-27 00:20:56,752 INFO L226 Difference]: Without dead ends: 5078 [2020-10-27 00:20:56,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:20:56,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2020-10-27 00:20:56,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 4631. [2020-10-27 00:20:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4631 states. [2020-10-27 00:20:56,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 5467 transitions. [2020-10-27 00:20:56,918 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 5467 transitions. Word has length 194 [2020-10-27 00:20:56,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:20:56,919 INFO L481 AbstractCegarLoop]: Abstraction has 4631 states and 5467 transitions. [2020-10-27 00:20:56,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:20:56,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 5467 transitions. [2020-10-27 00:20:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-27 00:20:56,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:20:56,925 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:20:56,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:20:56,925 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:20:56,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:20:56,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1189053968, now seen corresponding path program 1 times [2020-10-27 00:20:56,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:20:56,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624222385] [2020-10-27 00:20:56,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:20:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:57,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:57,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:58,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:00,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:01,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:01,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-27 00:21:01,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:21:01,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4302 [2020-10-27 00:21:01,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:01,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 00:21:01,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:21:01,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 272 [2020-10-27 00:21:01,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:01,576 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:21:01,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:21:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:01,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:01,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:01,612 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:21:01,612 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:01,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 00:21:01,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:01,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:21:01,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:01,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:21:01,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:01,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:21:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:01,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:02,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:02,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:21:02,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:02,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 343 [2020-10-27 00:21:02,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:02,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:21:02,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:02,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:21:02,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:02,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:21:02,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:02,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:02,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:02,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:21:02,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:02,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 216 [2020-10-27 00:21:02,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:02,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:02,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:02,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:21:02,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:02,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:21:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:02,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:02,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:02,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:21:02,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:02,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-27 00:21:02,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:02,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:02,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 00:21:02,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 00:21:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 9 proven. 34 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2020-10-27 00:21:02,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624222385] [2020-10-27 00:21:02,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:21:02,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:21:02,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894906481] [2020-10-27 00:21:02,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:21:02,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:21:02,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:21:02,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:21:02,994 INFO L87 Difference]: Start difference. First operand 4631 states and 5467 transitions. Second operand 8 states. [2020-10-27 00:21:03,165 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:21:31,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:31,022 INFO L93 Difference]: Finished difference Result 13406 states and 16762 transitions. [2020-10-27 00:21:31,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 00:21:31,025 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 265 [2020-10-27 00:21:31,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:31,072 INFO L225 Difference]: With dead ends: 13406 [2020-10-27 00:21:31,073 INFO L226 Difference]: Without dead ends: 8753 [2020-10-27 00:21:31,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:21:31,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8753 states. [2020-10-27 00:21:31,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8753 to 6923. [2020-10-27 00:21:31,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6923 states. [2020-10-27 00:21:31,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6923 states to 6923 states and 8522 transitions. [2020-10-27 00:21:31,358 INFO L78 Accepts]: Start accepts. Automaton has 6923 states and 8522 transitions. Word has length 265 [2020-10-27 00:21:31,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:31,360 INFO L481 AbstractCegarLoop]: Abstraction has 6923 states and 8522 transitions. [2020-10-27 00:21:31,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:21:31,360 INFO L276 IsEmpty]: Start isEmpty. Operand 6923 states and 8522 transitions. [2020-10-27 00:21:31,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-10-27 00:21:31,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:31,368 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:21:31,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:21:31,369 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:31,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:31,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1797253393, now seen corresponding path program 1 times [2020-10-27 00:21:31,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:31,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695882549] [2020-10-27 00:21:31,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:31,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:31,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:31,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:33,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:36,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:36,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 304 [2020-10-27 00:21:36,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:21:36,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-27 00:21:36,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:36,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:36,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:21:36,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-27 00:21:36,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:36,854 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:21:36,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:21:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:36,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:36,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:36,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:21:36,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:36,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 00:21:36,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:36,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:21:36,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:36,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:21:36,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:36,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:21:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:36,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:37,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:37,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:21:37,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:37,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 00:21:37,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:37,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:21:37,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:21:37,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:21:37,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:37,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:21:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:37,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:37,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:37,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-27 00:21:37,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:37,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-27 00:21:37,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:37,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:21:37,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:21:37,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 00:21:37,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:21:37,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-10-27 00:21:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:37,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:37,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:21:37,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:21:37,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:21:37,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-27 00:21:37,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:21:37,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:21:37,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:21:37,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:21:37,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:21:38,273 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 127 proven. 70 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2020-10-27 00:21:38,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695882549] [2020-10-27 00:21:38,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:21:38,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:21:38,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821247976] [2020-10-27 00:21:38,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:21:38,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:21:38,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:21:38,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:21:38,279 INFO L87 Difference]: Start difference. First operand 6923 states and 8522 transitions. Second operand 7 states. [2020-10-27 00:21:39,256 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 00:21:45,153 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 71 [2020-10-27 00:21:56,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:21:56,719 INFO L93 Difference]: Finished difference Result 14873 states and 18406 transitions. [2020-10-27 00:21:56,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:21:56,726 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 288 [2020-10-27 00:21:56,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:21:56,763 INFO L225 Difference]: With dead ends: 14873 [2020-10-27 00:21:56,764 INFO L226 Difference]: Without dead ends: 8391 [2020-10-27 00:21:56,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-27 00:21:56,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8391 states. [2020-10-27 00:21:56,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8391 to 8350. [2020-10-27 00:21:56,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8350 states. [2020-10-27 00:21:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8350 states to 8350 states and 10230 transitions. [2020-10-27 00:21:56,988 INFO L78 Accepts]: Start accepts. Automaton has 8350 states and 10230 transitions. Word has length 288 [2020-10-27 00:21:56,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:21:56,988 INFO L481 AbstractCegarLoop]: Abstraction has 8350 states and 10230 transitions. [2020-10-27 00:21:56,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:21:56,989 INFO L276 IsEmpty]: Start isEmpty. Operand 8350 states and 10230 transitions. [2020-10-27 00:21:56,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-27 00:21:56,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:21:56,995 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:21:56,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:21:56,996 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:21:56,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:21:56,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1674236081, now seen corresponding path program 1 times [2020-10-27 00:21:56,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:21:57,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963428848] [2020-10-27 00:21:57,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:21:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:21:57,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:21:57,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:00,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:02,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:02,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 328 [2020-10-27 00:22:02,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:22:02,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 00:22:02,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:02,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:22:02,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:22:02,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 224 [2020-10-27 00:22:02,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:02,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:22:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:02,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:02,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:02,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:22:02,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:02,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 00:22:02,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:02,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:22:02,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:02,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:22:02,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:02,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:22:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:02,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:02,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:02,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:22:02,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:02,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 346 [2020-10-27 00:22:02,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:02,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:22:02,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:02,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:22:02,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:02,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:22:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:02,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:03,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:03,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 00:22:03,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:03,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 254 [2020-10-27 00:22:03,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:03,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:22:03,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:03,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-27 00:22:03,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:03,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-10-27 00:22:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:03,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:03,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:03,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:22:03,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:03,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-27 00:22:03,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:03,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:22:03,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 00:22:03,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:22:03,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 225 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 00:22:03,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963428848] [2020-10-27 00:22:03,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:22:03,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 00:22:03,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328238173] [2020-10-27 00:22:03,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:22:03,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:22:03,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:22:03,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:22:03,704 INFO L87 Difference]: Start difference. First operand 8350 states and 10230 transitions. Second operand 10 states. [2020-10-27 00:22:03,955 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-27 00:22:04,832 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 71 [2020-10-27 00:22:24,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:22:24,053 INFO L93 Difference]: Finished difference Result 16843 states and 20838 transitions. [2020-10-27 00:22:24,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 00:22:24,057 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 312 [2020-10-27 00:22:24,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:22:24,087 INFO L225 Difference]: With dead ends: 16843 [2020-10-27 00:22:24,087 INFO L226 Difference]: Without dead ends: 8934 [2020-10-27 00:22:24,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-27 00:22:24,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8934 states. [2020-10-27 00:22:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8934 to 8813. [2020-10-27 00:22:24,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8813 states. [2020-10-27 00:22:24,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8813 states to 8813 states and 10718 transitions. [2020-10-27 00:22:24,359 INFO L78 Accepts]: Start accepts. Automaton has 8813 states and 10718 transitions. Word has length 312 [2020-10-27 00:22:24,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:22:24,360 INFO L481 AbstractCegarLoop]: Abstraction has 8813 states and 10718 transitions. [2020-10-27 00:22:24,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:22:24,360 INFO L276 IsEmpty]: Start isEmpty. Operand 8813 states and 10718 transitions. [2020-10-27 00:22:24,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-10-27 00:22:24,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:22:24,369 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:22:24,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 00:22:24,370 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:22:24,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:22:24,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1234525450, now seen corresponding path program 1 times [2020-10-27 00:22:24,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:22:24,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206180262] [2020-10-27 00:22:24,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:22:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:24,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:24,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:25,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:29,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:29,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-27 00:22:29,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:22:29,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-27 00:22:29,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:29,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:22:29,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-27 00:22:29,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-27 00:22:29,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:29,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:22:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:29,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:29,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:29,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:22:29,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:29,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:22:29,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:29,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:22:29,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:29,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:22:29,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:29,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:22:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:29,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:29,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:29,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:22:29,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:29,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 00:22:29,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:29,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:22:29,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:29,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:22:29,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:29,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:22:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:29,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:29,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:29,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:22:29,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:29,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-27 00:22:29,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:29,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:22:29,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:22:29,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 00:22:29,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:29,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2020-10-27 00:22:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:29,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:29,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:29,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-27 00:22:29,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:29,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-10-27 00:22:29,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:29,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:22:29,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:22:29,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-27 00:22:29,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:30,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 283 [2020-10-27 00:22:30,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:22:30,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:22:30,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:22:30,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:22:30,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:22:30,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-27 00:22:30,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:22:30,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:22:30,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:22:30,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:22:30,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:22:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 232 proven. 70 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-27 00:22:30,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206180262] [2020-10-27 00:22:30,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:22:30,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:22:30,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836566420] [2020-10-27 00:22:30,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:22:30,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:22:30,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:22:30,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:22:30,317 INFO L87 Difference]: Start difference. First operand 8813 states and 10718 transitions. Second operand 7 states.